Guide to Flat Roof Construction in Quebec

Flat roofs are becoming an increasingly popular choice for commercial and residential buildings in Quebec, thanks to their sleek, modern appearance and practical functionality. Whether for reasons of energy efficiency, optimal use of space or to achieve a contemporary design, the construction of a flat roof offers many advantages.

Building a flat roof demands a thorough understanding of construction standards and regulations. Combined with careful planning, these measures guarantee that the structure will last and do its job in the local climate.

Our flat roof builders in Montreal present this guide explaining what is involved in flat roof installation in Quebec, with a focus on choosing the right materials and putting in place best practices for a successful project.

Choosing to install a flat roof

Appearance is not the only thing to consider when choosing a flat roof for a construction or renovation project in Quebec. In fact, there are a range of practical, environmental and design considerations that can significantly influence the efficiency and value of a property.

Modern design

Flat roofs are synonymous with modernity and minimalism. They create a clean skyline that blends harmoniously with an urban environment, one element of a contemporary architectural approach.

Efficient use of space

In contrast to pitched roofs, flat roofs offer the possibility of using your roof to create usable outdoor spaces such as roof decks or green roofs. The roof area can be used for relaxation, recreation or even urban vegetable gardens, adding living space to a building without taking up surrounding land.

A flat roof can be smooth and accessible, and can be used to install solar panels or rainwater harvesting systems. These additions help reduce a building’s ecological footprint and allow building owners to spend less on heating and cooling.

Durable and resistant to local climatic conditions

Modern building materials and techniques have greatly improved the strength and lifespan of flat roofs. This is especially important in the face of the extreme climatic conditions typical of Quebec, which include heavy precipitation, ice and snow, and wide variations in temperature.

With efficient drainage systems and simplified maintenance, flat roofs are designed to prevent water and snow accumulation, reducing the risk of infiltration and helping the roof and building last longer.

Flat roof installation standards and regulations

The construction of a flat roof, like any other construction or restoration project, must comply with a strict set of standards and rules, which were put in place to monitor and regulate the safety, sustainability and energy efficiency of local buildings.

Régie du Bâtiment du Québec (RBQ)

The RBQ oversees the construction quality and safety of buildings in Quebec. It outlines strict standards for all aspects of flat roof construction, with a focus on structural safety, waterproofing and insulation.

If you are planning to complete a construction project in Quebec, you need to follow the RBQ’s guidelines. This includes using approved materials and construction techniques and upholding established standards for insulation and ventilation.

Importance of municipal approval

Before starting a flat roof construction project for a residential or commercial building, you must obtain a building permit from your municipality.

A permit confirms that your project meets not only provincial and national standards, but also specific local regulations. These may include restrictions related to building height and appearance and the appropriate use of outdoor spaces.

Municipal inspections at various stages of the project guarantee that construction complies with approved plans and follows all applicable standards. To learn more about municipal regulations, you can always contact a professional Montreal roofer.

Flat roof planning and design

Any successful flat roof project in Quebec begins with careful planning and design. This initial step aligns the architectural goals of the project with climatic and regulatory requirements.

Assessing goals and requirements

What is the primary function of your roof? Have you chosen a flat roof for its appearance, or are you planning to use the space for green installations, recreational areas, or to install solar panels?

Set clear goals related to energy performance, sustainability, and long-term maintenance. Also, consider the impact of your project on the value of the building.

Choosing materials adapted to Quebec’s climate

With its harsh winters and hot summers, Quebec’s climate poses unique construction challenges. Choosing the right building materials is extremely important:

  • Elastomeric membrane: This roofing material is particularly valued for its resistance to temperature variations and its ability to return to its original shape after being stretched. It offers excellent waterproofing and is resistant to UV and weathering, making it an ideal choice for flat roofs in areas with a harsh climate.
  • Modified Bitumen membranes: Polymer Modified Bitumen (PMB) offers high durability and resistance to cracking. It is well suited to the extreme climatic conditions typical of Quebec, and will absorb building movements caused by freezing and thawing.

Insulation and ventilation

Proper roof insulation helps maintain a building’s energy efficiency and protects the structure from frost damage. When you build a flat roof, choose high-quality insulation materials that meet current energy standards.

A proper roof ventilation system will prevent moisture build-up and condensation problems that could compromise the integrity of the roof or building and also affect indoor air quality. Proper ventilation makes building materials last longer and contributes to a healthy indoor environment.

Steps to building a flat roof

Building a flat roof is a complex process. Attention to detail at every stage is vital to the safety, durability, and efficiency of the project. It is always preferable to contact a certified roofer to complete this type of work, but keep reading if you want to learn the main steps involved in flat roof construction in Quebec.

1. Site preparation & safety

  • Cleaning the site: The process begins by making sure the roof surface is clear of debris and clean, so nothing can get in the way of construction.
  • Safety measures: Always put adequate safety measures in place to protect workers and bystanders. This will likely involve installing temporary guardrails and using personal protective equipment (PPE).

2. Construction of the frame

  • Roof framing: The roof frame must be strong enough to support the weight of the roof itself and additional loads due to snow and whatever else you intend to install (such as a rooftop garden). Always use approved materials that comply with local building standards.
  • Slope check: Despite its name, a “flat” roof still requires a slight slope for water drainage. Make sure the frame allows water to flow to specific drainage points.

3. Installation of thermal insulation

  • Choice of insulation: Select an insulating material according to the local climate. Roof insulation must offer good thermal performance and be resistant to moisture.
  • Installation: Insulation is usually installed on the frame before applying the waterproofing membrane. Make sure it is spread uniformly to avoid creating thermal bridges.

4. Application of a waterproofing membrane

  • Choose a membrane: Choose an elastomeric or modified bitumen membrane according to the specifics of your project. Factors to consider include durability, weather resistance, and how easy it will be to maintain the roof.
  • Application: Depending on the type of waterproofing you are applying, it could be glued, welded or mechanically fastened to the roof. Make sure all joints and edges are properly sealed, to prevent leaks.

5. Drainage systems

  • Drainage system design: No matter where your building is, you need to install effective drainage solutions to direct water away from the structure. These could include gargoyles, overflows, or drains. Drainage points should be evenly distributed to prevent water pooling.
  • Installation: Install the drainage system according to the design plans, and include an adequate slope to facilitate water drainage.

6. Finishes & accessories

  • Guardrails and barriers: If your flat roof is going to be accessible, you’ll need to install guardrails and safety barriers that meet local standards.
  • Additional elements: If you plan to use the roof space for a deck or garden, or solar panels, be sure to install all elements carefully without damaging the waterproofing membrane.

Renovate or build a flat roof with our roofers!

Building, maintaining and repairing a flat roof can pose a challenge, especially in Quebec’s varied climate. Professional roofers can guarantee that your flat roof complies with local standards and regulations, and can also help keep your roof in excellent condition.

At Duro-Toit we understand the importance of a well-built and well-maintained flat roof. That’s why we offer comprehensive specialized flat roof construction services, from initial design to final installation. Each project is completed with precision to meet the highest standards of quality and compliance.

Our team of professionals is dedicated to providing top quality roofing solutions tailored to the unique needs of each project. Whether you plan to build a new flat roof or need help to maintain or repair an existing roof, Duro-Toit is here to help you every step of the way.

6 Tips to Extend the Life of Your Roof

Any roof in Quebec is exposed to the elements, natural wear and tear, and the fluctuations of the local climate. These factors combined mean that roof maintenance is absolutely necessary to extend your roof’s lifespan and avoid costly repairs.

In this article, our Montreal roofing professionals offer their best practical advice and strategies for prolonging the life of your roof.

1. Do regular inspections

The lifespan of a roof depends largely on how often you do thorough inspections. Properly examining your roof will allow you to identify problems and resolve them quickly, before they become serious. Inspections help you avoid expensive repairs, but still do what is necessary to extend the life of your roof.

Recommended frequency for roofing inspections

We recommend inspecting your sloped roof at least twice a year: once in spring and once in autumn. These seasons follow the periods of the year when Quebec experiences the most extreme weather conditions, winter and summer, which can cause significant damage to your roof.

We also recommend an additional inspection after major storms or exceptional weather events, to verify whether there is any damage.

Key points to check during a roof inspection:

  • Condition of shingles or tiles
  • Gutter system
  • Roofing materials
  • Presence of moss or algae
  • Ventilation and insulation

2. Clean and maintain your roof

Regular cleaning and maintenance of your roof will help prevent damage and extend its life. Cleaning gutters and removing moss and debris are particularly important maintenance tasks.

Cleaning your gutters

Gutters are part of your roof’s drainage system, and they also help direct water away from the foundation of the building. When they are clogged with leaves, branches or other debris, water can accumulate and eventually seep under the shingles, causing damage to your roof structure and even to the interior of your building.

Regular cleaning of your gutters, at least twice a year, will keep your eavestroughs functioning properly and prevent problems linked with moisture.

Removing moss and debris

Moss can trap moisture against the surface of your roof, which damages the shingles and shortens the lifespan of your roof. To remove moss, use a soft bristle brush or roofing rake to gently loosen it from the surface without damaging the shingles. After brushing, apply an anti-moss product designed especially for roofs, and follow the manufacturer’s instructions carefully.

Leaves, branches and other debris can accumulate on your roof and in your gutters, promoting damp and the growth of moss or algae. Use a leaf blower or a soft brush to tidy up the surface. Make sure you work safely at heights, using a safety harness as needed.

If you need help cleaning your roof, you can always consult certified roofers.

3. Prevent weather damage

Extreme weather conditions (especially in Quebec) can take a toll on your roof. Wind, rain, snow or hail – they can all do damage, and you should take preventive measures!

Tips to protect your roof from weather-related damage

  • Do an inspection after storms: Inspect your roof for damage after any major weather event. Look for missing, damaged or lifted shingles, which can result from exposure to strong winds or hail.
  • Reinforce your roofing materials: When replacing or repairing your roof, consider using materials that are designed to withstand extreme weather conditions. Some shingles are specially treated to withstand high winds, hail and extreme temperature variations.
  • Prune trees: Tree branches hanging directly overhead can break off and fall on your roof during storms, causing significant damage. Regularly prune the trees around your building to reduce the risk.
  • Use an efficient drainage system: Make sure your gutters and drainage system are in good condition. It’s important to prevent water build-up, as it can weigh down your roof and even infiltrate your building.

4. React to minor roofing problems before they get worse

The key to keeping your roof in good condition and extending its lifespan is to be vigilant and take action when you notice a minor problem. Here are our tips for identifying and dealing with minor roofing problems, and advice about when to call in a professional.

Identify and repair minor problems quickly

  • Damaged or missing shingles: Damaged, lifted or missing shingles are a common problem that is easy to spot.
  • Minor leaks: Signs of moisture in the attic or on ceilings could mean you have a small leak. Find and repair the source of any leaks as soon as they appear to avoid more extensive work.
  • Clogged or damaged gutters: Functional gutters help direct water away from your home or building. Clean gutters regularly and repair any damage to keep water off your roof.
  • Moss and algae: Although they do not cause immediate damage, moss and algae can retain moisture on your roof which can makes your shingles wear out more quickly. Special moss- and algae-cleaning products can help keep them under control.

5. Use the right materials and installation techniques

Choosing the right materials and installing them properly are key to having a strong, long-lasting roof. When you invest in high-quality materials and install them correctly, you prevent many future problems.

Recommended roofing materials for a long roof lifespan

  • Asphalt shingles: Popular for offering good value for money, some high-quality asphalt shingles offer excellent weather resistance and can last up to 30 years.
  • Metal: Metal roofing is known to be highly durable, with a life expectancy of 50 years or more.
  • Slate: Natural slate is one of the most durable roofing materials and can last over 100 years. Although it is more expensive, its appearance and longevity make it a popular choice for upscale buildings.

Impact of installation quality on durability

Proper installation maximizes the lifespan of your roof. When you hire experienced, certified roofers, you can be confident that your roof covering will be installed according to industry best practices.

The best professionals will offer warranties on their work, so you have the option to benefit from follow-up services if there are problems. These services can include periodic inspections to verify that the roof is still in good condition.

6. Apply preventive treatments and protection

To extend the life of your roof and keep it working properly, you will need to take a few preventive measures, such as applying sealants and protective coatings, and using anti-moss and anti-algae treatments.

Sealants and protective coatings

  • Sealants: Roof sealants provide an extra layer of protection against water, sun and, in some cases, chemicals. They can extend the life of roofing materials by preventing premature degradation due to UV exposure and moisture.
  • Protective coatings: Coatings go one step further by improving a roof’s reflectivity, which reduces how much heat is absorbed by the roof and, consequently, cuts air-conditioning costs. Some coatings are specifically designed for specific roof coverings, like metal or elastomeric membrane roofs.

Advantages of anti-moss and anti-algae treatments

Mosses and algae thrive in damp environments, and they can cause significant damage to roofs by holding moisture against the surface. In time, this moisture causes materials to rot and can even weaken the roof structure. Anti-moss and anti-algae treatments can therefore help preserve the integrity of your roof.

Moss and algae can also make your roof look dull and make it look neglected. Preventive treatments help maintain the appearance of your building, and may even preserve or increase its value.

Duro-Toit Roofers can extend the lifespan of your roof

By following the tips and practices recommended in this article, you can significantly extend the life of your roof so it can continue to protect your home or commercial building. Remember that experienced roofing professionals have the expertise to guarantee that maintenance work is carried out to the highest standards.

For over 15 years, Duro-Toit roofers have specialized in the installation, repair and maintenance of commercial and residential roofs. Our team of certified professionals has the experience and skills to keep your roof in top condition, year after year.

Whether you need a roof installation or regular roof maintenance, Duro-Toit is ready to meet all your roofing needs. Contact us today to discuss your project and find out how we can help protect your investment for years to come.

What is an Elastomeric Membrane for Flat Roofs?

Flat roofs are a common feature of modern commercial buildings, as they are both practical and visually attractive. Over time, roofing technology has evolved from traditional asphalt and gravel methods to more advanced and durable solutions. Elastomeric membrane stands out among these innovations as a leading choice for protecting flat roofs.

Our Montreal roofers present you this complete guide to elastomeric membrane roofing.

Elastomeric membrane flat roof covering

Elastomeric membrane is your best option for low-slope or flat roofs. It’s made from polymer modified bitumen (PMB), which gives it flexibility and strength, and is often reinforced with a fiberglass or polyester mat to make it even more durable.

This modern roofing technology was developed through ongoing efforts by the construction industry to develop materials that are both strong and resistant to the elements. It offers a superior alternative to traditional roofing materials.

Elastomeric membrane layers

Elastomeric roofing is composed of two layers. These are heat-welded together during installation to form a single, continuous membrane. Once fused, the membrane acts as a highly effective waterproof barrier that allows the roof to breathe without any risk of moisture build-up.

Base coat

The first or base layer is made of elastomer modified bitumen (EMB). This layer serves as the first barrier against water and weather. It is usually reinforced with a fiberglass or polyester mat to increase its strength and durability. The base coat is applied directly to the roof substrate to create a strong, long-lasting bond.

Finishing coat

The second layer, or finishing coat, is also made of modified bitumen. However, this topcoat is covered with colored granules or another special protective coating. The second layer not only protects the flat roof membrane against UV damage and climatic variations, but also gives the roof its final sleek appearance. Granules can vary in color, making it possible to personalize the roof’s appearance to some degree.

Advantages of elastomeric membrane

Elastomeric roofing offers many significant advantages! Our certified roofers outline the most notable benefits.

Outstanding durability

Elastomeric membrane is widely recognized for being exceptionally durable and long-lasting, with a life expectancy of up to 35 years. This high performance results from its unique composition, which gives it superior resistance to the challenges posed by Quebec’s extreme weather conditions.

Easy to install

In addition to being robust, elastomeric membrane is easy to install and requires very little maintenance. These are major advantages in terms of both initial costs and long-term upkeep. Thanks to hot-application techniques and self-adhesive products, elastomeric membrane can be laid quickly and safely, using minimal labor with a low level of risk.

Multiple customization options

Elastomeric membranes give a sleek, modern appearance to buildings. They are available in a variety of colors, making it possible to customize a roof to match the architectural style of the building. This roofing material is a versatile solution that can be tailored to the specific needs of each project.

How to install an elastomeric membrane

Installing an elastomeric membrane on a roof is a technical process. For safe, effective installation, it’s important to prepare carefully and rely on the expertise of qualified professionals.

1. Preparing the roof

Before installation, the roof must be cleaned of any debris, dust or materials that could prevent the membrane from sticking correctly. Any surface irregularities must be smoothed out so the membrane can be applied evenly.

2. Applying the undercoat

The first layer, or undercoat, ensures that the roof always remains watertight. This layer can be mechanically fastened to the roof, or glued, depending on the manufacturer’s specifications and the condition of the roof.

3. Installing the elastomeric membrane

Next, it’s time to install the elastomeric membrane. For traditional installations, roofers use a blowtorch to heat the membrane so that it fuses with the underlay. It’s important to avoid creating any air bubbles or creases that could compromise the seal.

4. Cold application technique

Cold application is becoming increasingly popular as an alternative to using a blowtorch. This method involves using self-adhesive membranes which do not need to be heated, so pose no risk of fire. This technique is a safe and easy installation option.

5. Finishing

Once the elastomeric membrane has been installed, finishing touches can be applied to the edges of the roof, and around drains and other roof elements, to ensure maximum protection against water infiltration.

6. Inspection and cleaning

Installation ends with a detailed inspection of the membrane to check for defects and make sure all areas of the roof are covered properly. Roofers will also do a final site clean-up.

Elastomeric membrane maintenance

Mantaining an elastomeric membrane is relatively simple and less demanding than for other types of roofing. Still, there are a few things you can do to make your roofing last longer and perform better.

  • Regular inspections: We recommend inspecting the roof at least twice a year, usually in spring and autumn, to detect any problems like cracks, bubbles and tears in the membrane, or issues at joints and edges.
  • Cleaning: Clean the surface of the elastomeric membrane carefully, using soft brooms or low-pressure washers to avoid causing damage. It is important to remove debris, leaves and other items that may accumulate on the roof and clog drainage systems.
  • Minor repairs: If you detect minor damage, such as cuts or punctures, we recommend that you contact a roofing professional as soon as possible.
  • Maintenance of drainage systems: Gutters and drains should be checked and cleaned regularly to ensure proper water drainage. Water accumulation on the roof can lead to long-term damage.
  • Monitoring after major weather events: Inspect your roof for damage following heavy storms or significant snowfall.

Flat roof maintenance by Duro-Toit

Elastomeric membranes offer durability, exceptional weather resistance and minimal maintenance, making them an ideal solution for flat roofs. However, to guarantee that your roof covering works properly and lasts as long as it should, it’s a good idea to trust professional roofers with installation and maintenance.

Duro-Toit professional roofers have extensive experience in flat roof maintenance, repair and more. We have mastered elastomeric membrane installation and maintenance techniques.

Trust our roofers to provide a high-performance, long-lasting roof. Contact us today to discover how we can help you get the most out of your roof covering.

What is EPDM Roofing?

EPDM roofing membrane is an innovative and durable roof covering that is the solution of choice for flat and low-slope roofs. This type of roofing is resistant to extreme weather conditions and lasts a long time, making it a reliable alternative to traditional roofing methods.

In this article, our Montreal roofers explain what makes EPDM roofing unique. Keep reading to learn about the advantages it offers, how to install it and the type of maintenance that will maximize its lifespan.

EPDM membrane

EPDM (ethylene-propylene-diene monomer) membrane is a synthetic rubber roof covering that offers excellent resistance to extreme weather conditions, UV rays and ozone.

Its unique composition makes it perfect for flat roofs in the residential, commercial and industrial sectors.

Advantages of EPDM roofing

EPDM is a type of flat roof membrane with many benefits, making it an attractive choice for both home and business owners.

Exceptional durability and longevity

EPDM membranes are known to last a long time, with a lifespan that can easily go beyond 30 years, lasting even up to 50 years. It is resistant to UV, ozone and climatic variations, meaning it will retain its physical properties over long periods of exposure.

Resistance to extreme weather conditions

Since it is a type of synthetic rubber, EPDM roofing can withstand extremely cold or hot temperatures without cracking, deforming or losing elasticity. It also offers excellent resistance to all precipitation – rain, snow or hail.

Easy installation and low maintenance

It doesn’t take long to install an EPDM membrane, and installation does not require the use of an open flame, which greatly reduces associated risks. Once installed, it requires very little maintenance. Regular inspections and minor repairs are usually enough to keep it up to par.

Positive environmental impact

EPDM is an environmentally friendly choice because it lasts a long time, reducing the need for frequent replacement, and because it is recyclable. EPDM membranes can also be used to create white roofs, which help reduce air-conditioning costs and the overall carbon footprint of your building.

How to install an EPDM membrane

It is important to install EPDM roofing membrane correctly and precisely to guarantee that it will be strong and last a long time. Certified roofers explain.

1. Surface preparation

The first step is to carefully prepare the roof. This means making sure that the surface is clean, dry and free of debris, and any irregularities or sharp objects have been removed, to avoid puncturing the membrane.

2. Placing the membrane

The EPDM membrane is then unrolled and spread over the roof surface. At this stage, it’s important to let it sit for a few hours so that it can acclimatize and relax. This will reduce the risk of wrinkles or tensions in the material.

3. Attaching the roof covering

There are several possible ways to attach an EPDM membrane, depending on the type of roof and the manufacturer’s specifications. The most common methods include fastening it to the roof edges, or full adhesion to the roof surface.

4. Sealing the joints between strips

The joints between the EPDM membrane strips need to be sealed with a special adhesive tape or waterproofing liquid so they will be completely waterproof. This step requires high precision to prevent any roof leaking.

5. Finishing and details

Roof elements such as ventilation ducts, chimneys, etc. require special attention. Pre-formed parts or in-situ molding techniques can be used to create a watertight seal.

How to take care of an EPDM roof

EPDM roofing is known to be durable and to provide effective, long-term protection for flat roofs. However, as for all roof coverings, proper maintenance will maximize its longevity and performance.

  • Regular inspections: We recommend carrying out a visual inspection of your EPDM roof at least twice a year, ideally in spring and autumn. It’s important to detect any problems like cracks, bubbles or signs of wear before they become serious.
  • Cleaning: EPDM roofing surfaces should be cleaned regularly to remove dirt, debris and leaves, which can trap moisture and encourage the growth of algae or moss.
  • Drainage: Make sure your roof’s drainage system is working properly. Gutters and downspouts should be cleaned regularly to avoid blockages that could cause water accumulation.
  • Repairs: If you notice small holes or cracks in your EPDM membrane, we recommend that you call in a professional.

Choose the right roof covering with Duro-Toit

Duro-Toit offers recognized expertise in EPDM membrane installation, maintenance and renovation for flat roofs. Our dedicated and experienced team of professionals does flawless, long-lasting installations that will protect any roof and keep it looking great for years to come.

Whether you’re planning a new installation, a complete renovation or simply need to do preventive maintenance, our roofers are at your service with high-quality, custom solutions. Trust us with your project to enjoy total peace of mind and satisfaction, guaranteed.

How to Manage Snow Accumulation on a Roof

Winter has arrived in Quebec, and beautiful white snow along with it. But picturesque winter scenes can quickly turn into a concern when you consider just how much damage snow accumulation on a roof can do.

Many businesses and residents of the province are unaware of the dangers linked with snow on a roof. In fact, few building owners know that just a few inches of snow piled on top of a roof can weigh several hundred kilograms.

Is your roof ready to handle that much weight in snow? The reality is that many roof structures are not built to withstand that much of a load, making a snow removal service essential.

How much snow can your roof support? What can you do to protect your roof from snow build-up in winter? Duro-Toit answers these questions below.

Snow accumulation on a roof: risks and dangers

Snow build-up can significantly add to the weight borne by your roof structure, especially when it is partially melted and wet. An overload can pose various risks and dangers:

  • Roof collapse: The most serious risk is roof collapse. Older roofs and those not designed to support heavy loads can collapse under the excessive weight of snow.
  • Leaks and internal damage: Snow accumulation on a roof can also cause leaks, leading water to infiltrate your building. Melting snow can seep through cracks or worn joints and cause long-term damage.
  • Ice formation: When snow melts and refreezes, it can create ice dams that prevent proper water drainage and increase the risk of building damage.

How much snow can a roof hold?

According to the Insurance Institute for Business and Home Safety, most residential roofs in good condition can handle 20 pounds per square foot of snow.

Another factor that to consider when determining whether the snow on your roof is approaching this weight limit is the type of snow:

  • Fresh snow: 10 to 12 inches of fresh snow equals about 5 pounds per square foot of roof. This means you can have a maximum snow load of 4 feet before the roof becomes strained.
  • Packed snow: 3 to 5 inches of “old snow” equals about 5 pounds per square foot of roof. More than 1 foot of snow may be more than your roof can handle.
  • Ice on the roof: A thin 1-inch layer of ice is equivalent to 12 inches of fresh snow! This is why it is so important to watch for ice dams and take care of them quickly.

We have put together at least one easy to use calculator to help you. Check it out in our article on how to calculate the weight of snow on your roof.

In a matter of seconds, you’ll know whether you need to clear your roof of snow or whether you can sleep soundly.

Snow weight accumulates quickly on flat roofs

Keep in mind that flat roofs are more susceptible to snow damage because the total weight accumulates faster. This is because melt water is more likely to freeze on flat roofs before it can drain off, contrary to pitched roofs.

Snow removal on flat roofs should be done more frequently to avoid serious structural damage.

What to do when snow starts to accumulate on your roof

To prevent snow from accumulating on the roof and avoid all the risks that this entails, you should commit to frequent snow removal. Snow removal is not a simple task and is often dangerous. Whoever is responsible for clearing snow from the roof should take all necessary safety precautions.

At Duro-Toit, we recommend contacting snow removal professionals if you have any doubts about your ability to safely remove snow from your roof.

Look for signs of roof damage

Sagging ceiling tiles or sprinkler lines, popping or cracking noises, blocked doors and windows, cracked walls or a leaky roof are all signs of an over-stressed roof.

Roof inspections are important

If you live in Quebec or anywhere where there is a lot of snow in winter, consider scheduling a professional roof inspection before the cold sets in. It’s best to confirm that your roof can handle the weight of the snow before it begins to fall.

And even if snowfall isn’t frequent where you live, it’s a good idea to contact an expert at least once a year to check the condition of your roof. Even rain or wind can cause problems if your roof is in bad shape.

Winter roof maintenance and preventive measure

Preventing snow build-up and maintaining your roof regularly will prevent damage and keep everyone safe during the winter months. Here are some practical tips from our Montreal roofers:

  • Install snow barriers: Snow barriers or snow guards can prevent snow from accumulating unevenly on your roof and sliding off in large quantities.
  • Use heating cables: Roof de-icing cables along gutters and roof edges can help prevent ice dams by making snow melt and drain off more quickly.
  • Proper insulation and ventilation: This helps maintain an even roof temperature and reduces the risks of repeated melting and refreezing.
  • Preventive snow removal: Consider removing snow from your roof to avoid excessive accumulation in the event of a heavy snowfall.

Safe rooftop snow removal with Duro-Toit!

With winter in full swing, you need your roof to be safe and functional. At Duro-Toit, we understand the importance of efficient, responsible snow removal.

Our team of experts is equipped to handle the challenges of winter snow removal and keep your flat or pitched roof in perfect condition.

If you need our services or have any questions, call us at (514) 755 – 8648 or fill out the form on our contact page.

Pros and Cons of Roof De-Icing Cables

A common problem for building owners in snowy climates is the formation of ice dams on their roofs.

Ice dams are build-ups of ice and snow on the edges and eaves of a pitched roof. Ice dams can result in beautiful icicles, but they can also damage the roof, break gutters and cause water infiltration.

Several strategies have been developed over the years to prevent the formation of ice dams and the resulting property damage. One of the most popular strategies is roof de-icing cables.

In this article, Montreal roofers explain how ice dams form and how roof de-icing cables can help counteract the process.

What is roof de-icing cable?

A roof de-icing cable, also known as a roof heating cable or heating wire, is a roofing system designed to prevent ice and snow build-up on roofs, gutters and downspouts.

A heavy-duty electric cable is energized to generate heat. This heat prevents ice from forming and melts snow to preserve the roof structure and prevent potential damage caused by ice build-up.

How can roof de-icing cables help prevent ice dams?

Roof de-icing wires use electrical resistance to generate heat, melting pathways through the snow and ice on the roof. The channels allow meltwater to run off instead of freezing into ice dams or seeping into the roof. 

Please note: De-icing cables cannot melt all of the snow on the roof or completely prevent ice dams. Roof snow removal is still important when there is a thick layer of snow, even if the roof is equipped with de-icing cables.

Advantages of installing roof de-icing cables

If the de-icing cables are good quality and are installed by certified professional roofers, they can certainly minimize the water accumulation that causes ice dams and help slow their growth. They are generally placed in patterns along eaves, around chimneys and skylights and in gutters or drainpipes.

Although de-icing cables aren’t a permanent solution, they are an excellent choice for homeowners who need a quick solution. They cost much less than the roofing work needed to seal attic leaks, install proper insulation and create appropriate roof ventilation systems.

There are 4 main advantages of to installing roof de-icing cables:

  1. Prevention against ice formation and ice dams
  2. Protection against structural damage caused by the weight of snow
  3. Reduced maintenance and repair costs
  4. Improved safety

Choosing the right type of de-icing cable

Selecting the right type of de-icing cable will ensure that your roof is effectively protected against the harsh elements during winter. There are several different types of heating cable on the market, each suited to specific applications and climatic conditions.

Types of heating cables

  • Self-limiting heating cables: These cables are designed to adjust their heat output according to ambient temperature. They are ideal for climates where temperatures vary dramatically.
  • Constant wattage heating cables: These cables provide a constant amount of heat and are often used in areas where temperatures remain uniformly low.
  • Temperature-controlled heating cables: Fitted with sensors, these cables adjust their heat output according to weather conditions, making them energy-efficient.

Choosing the right cable for the building structure

  • Roof type: The choice of cable depends on the type of roof (slate, tile, metal, etc.). Some cables are better suited to specific surfaces than others.
  • Roof layout: Consider roof features such as slope, valleys, gutters and downspouts. This will influence the type of cable and installation method you choose.

Choosing a cable to suit the climate

  • Intensity of winter conditions: Regions subject to heavy snowfall and extremely low temperatures (like Quebec) will require sturdy, high-performance cables.

Roof heating cable installation

Installing a roof heating cable is a process that requires precision and attention to detail. Here’s a step-by-step guide to installing de-icing cables. Remember, always follow the manufacturer’s instructions!

1. Preparedness and safety

Start by reading the manufacturer’s instructions carefully. Each cable type may have specific installation requirements.

Make sure you have all necessary tools and materials at hand.

Switch off the power supply to the installation area and use appropriate safety equipment.

2. Planning the layout

Calculate the total cable length required, remembering to measure gutters, downspouts and problem areas on the roof.

Plan where the wiring will cross the roof, making sure to cover areas where ice and snow tend to accumulate most often.

3. Installing the de-icing cable

Start by securing the cable along roof edges, in gutters and around downspouts. Use the fasteners and clips supplied by the manufacturer.

Make sure the cables don’t cross each other and are distributed evenly.

Maintain the recommended spacing between cable loops for even heat distribution.

4. Electrical connection

Connect the cable to the electrical system according to the manufacturer’s instructions. If you aren’t sure how tot do this, exercise caution and call in a qualified electrician.

If your system is equipped with a thermostat or sensor, you’ll need to install this as well.

5. System test

Once installation is complete, turn the power supply back on and verify that the system is working correctly.

6. Post-installation maintenance

After installation, inspect the system regularly for any flaws or damage.

Installation of heating cables: safety and regulatory compliance

Installing roof heating cables involves following strict safety procedures, including disconnecting the power supply and using protective equipment. Work at heights must be carried out using fall-prevention equipment, and you must never attempt it alone. Be sure to respect the wire spacing recommended by the manufacturer to prevent overheating and reduce the risk of fire.

When installing heating cables, you must comply with electrical and building regulations, using certified equipment that meets established criteria for safety and quality. To guarantee that your cables are installed correctly, call on qualified professionals.

Install de-icing cables to protect your roof during the winter!

It’s very important to understand that roof de-icing cables cannot prevent ice dams from forming or eliminate them completely. They simply melt channels through the dams to help meltwater flow off the roof. To prevent ice dams from forming in the first place, you must address the root of the problem—an overheated roof caused by heat leakage from inside the house and/or a lack of maintenance in specific weather conditions.

Thankfully, Duro-Toit roofers are here to help homeowners whose roofs are prone to ice dams. After inspecting the roof, we will suggest a customized approach that includes all of the work needed to keep your roof at the ideal temperature. 

Contact us today for more information!

Roofing Maintenance: Complete Checklist

Whether it’s your house, your condo or your business premises, the condition of your roof has a direct impact on your building and your well-being.

A worn out and unmaintained roof can cause a lot of problems, including leaks and insulation defects, which can lead to high heating costs.

Being aware that your roof needs to be taken care of is a good thing, but how do you go about it? And when should you do it?

Find out now with Duro-Toit Montreal’s roofers practical roof maintenance checklist.

The 6 essentials of roofing maintenance

Do you want to protect your roof, but aren’t sure where to start? From cleaning and snow removal to regular inspections, discover 6 roof maintenance tips that will save you time and money!

1. Clean the roof with the right equipment

The roof of your home is the first line of defense against wind, rain, temperature changes and, of course, snow. Consequently, even a top-quality roof covering will be exposed to bad weather and possible damage. A few things must be done to ensure that your roofing retains both its appearance and its insulating properties.

Cleaning is an essential element of regular maintenance. When done on a regular basis, it gets rid of damaging debris such as leaves, branches, sand and moss. There are various ways to clean your roof. However, you should avoid using high-pressure jets or brooms, which can cause damage. For more information on the best cleaning  solutions for your type of roof, consult a roofing professional.

2. Waterproofing

Homeowners can protect their roof against moisture and leaks by applying a waterproofing product. This type of water or acrylic based protection is available in two forms:

  • Film-forming: once dry, it will form a protective film that prevents air and water from penetrating below its surface.

  • Pearl effect: as its name indicates, this environmentally friendly product helps to form droplets that run off the roof more easily.

Again, there are many different products on the market and it is important to consult a professional to choose a water repellent that is compatible with your choice of roofing membrane or asphalt shingles and will not alter its color or composition.

3. Moss treatment

As indicated earlier, the geographical location of your home, the amount of vegetation on the property and above all the humidity can often produce moss on the surface of the roof. Formed by algae or lichens, these mosses are extremely damaging because they store water, create cracks when it freezes and make the materials more porous and therefore more vulnerable to bad weather. A comprehensive roofing maintenance effort should include moss treatment.

4. Gutter maintenance

Maintaining gutters and downspouts is essential because all unwanted dirt and debris is drained through your gutters. If you neglect your gutters for a long period of time, the pipes can become blocked and damage your roof, exterior walls and other structural elements. A simple flush may be enough to clean them out. However, if there is too much buildup, a manual or high-pressure cleaning may be necessary to ensure proper drainage from your roof.

5. Snow removal

Ice and snow build-up is probably the most common cause of roof leaks and water damage in Quebec homes. This is in addition to the extra weight that often causes roof structures to collapse. Consequently, snow removal during storms is an essential step for maintaining your roof!

If you live in the Greater Montreal area, you can have your pitched roof snow removal or flat roof snow removal done by Duro-Toit.

6. Roof inspection

Remember, sometimes the signs of deterioration of a roof are imperceptible. You’ll need a roofing expert to determine the health of your roof. A quarterly inspection is recommended to verify whether your roof needs maintenance, and whether you have:

  • Peeling flashing
  • Granular loss
  • Missing shingles
  • Curling shingles
  • Cracked shingles

If a professional inspection results in the detection of damage, you will be able to take action more quickly to avoid the spread of any weakness or flaws that could result in the need for more complex roof repairs or a complete roof replacement.

When should your roof be serviced?

Doing maintenance on your roof is essential for effective building management, whether for a house, condo, building or commercial space. Maintenance done by professional roofers will extend the life of your roof and thus help maintain the integrity of the building, making it a truly worthwhile investment that will save you money in the long run.

Roofing maintenance should be done at the following times:

When your roof shows signs of wear

As soon as your roof appears to show signs of wear, which could be indicated by an uncomfortable change in temperature, abnormally high heating costs, visible deterioration of the coating or traces of moisture, you should have a roof inspection done. Professional roofers will be able to tell you what type of roof maintenance makes the most sense for the building.

Depending on the case, you may be able to fix the problem by repairing only the damaged portion of the roof, by removing the obsolete components and replacing them with new materials. The work may also involve simply sealing leaks or installing new sealants or better insulation.

Repairing or adding vents is also a great solution for roofing systems that are prone to ventilation problems. Investing in the installation of a new unit will be much less expensive than having to do a complete roof restoration.

Before winter arrives

Quebec’s climate is harsh on roofs, which need to survive strong winds and the weight of snow and ice in winter. To avoid Mother Nature’s wrath, roofing maintenance begins with careful winter preparation. Some roofing companies, like Duro-Toit, offer roof winterization services. Avoid any unpleasant surprises and make an appointment before the first snow storms hit!

During winter, snow can often build up in large quantities. It is common to see cracks, leaks, structural deformities or even complete roof collapses. We recommend hiring a professional to remove snow and ice from your roof, to limit the risk of injury.

At regular intervals

Roofing maintenance involves a certain amount of vigilance. You should have an expert inspect your roof every three to six months, or after bad weather.

Cleaning the gutters is important, as well as checking the storm drains, to be sure they are doing their job and draining water and debris.

Adding gravel to asphalt roofs is a sure way to protect them from the sun’s destructive rays. In fact, this simple roof maintenance trick will slow down the contraction of the asphalt during major temperature variations and make your roofing last longer.

Let experienced roofers take care of your roof!

In short, regular roofing maintenance is essential if you want to keep your roof in good condition for years to come! That said, roofing work has to be done at height, so it is safer to rely on professional roofers. To learn more, contact the experts at Duro-Toit today!

For more information on our roof maintenance services or to make an appointment with one of our technical advisors, contact us today at (514) 755-8648.

Condo Roof Replacement: What You Need to Know

Condominium roof renovation and repair is an example of collaborative property management. There are many questions that need answering when replacing a shared roof: how to find the right roofers, when to do the repairs, how to plan a budget, figuring out what type of repairs to do, and so on.

If you’re thinking of re-roofing your building, we can help! Montreal roofers present a comprehensive list of factors to consider at your next meeting of the syndicate, so that you can accomplish a successful condominium roof renovation.

What does condominium roof renovation involve?

Replacing a shared roof means completely or partially renewing the roofing of a building owned by several co-owners.

In the context of co-ownership, the building roof is considered a shared part of the building, which means that the maintenance and renovation of the roof are the collective responsibility of the co-owners, organized within the syndicate of co-owners. The aim of condo re-roofing is to restore the roof’s waterproofing, insulation and durability, thus preserving the integrity of the building as a whole.

When is it time to re-roof your condominium?

Knowing when to undertake condominium roof renovation is an important decision which has an impact on the entire building’s lifespan. There are several signs that it might be time to take action and renovate the roof:

  • Water infiltration
  • Moisture stains on the ceiling
  • Missing or damaged tiles or shingles
  • Visible wear of roofing membrane
  • Thermal insulation problems.

If repairing and maintaining your roof is no longer enough, it may be time for a complete overhaul. After all, a roof’s lifespan is not infinite. If this is the case for your condominium building, put your trust in certified roofers.

Seasonal and weather considerations

Choosing the best time to undertake a condominium roof renovation involves taking seasonal and weather considerations into account.

In general, spring and summer are times of year where the weather is favorable for this type of work. It’s best to avoid doing roof repairs in the winter, when coping with extreme cold and heavy snow can add to the cost of the project.

Collaborative planning to avoid costly emergencies

Condominium roof renovation is a major project that requires careful planning and close collaboration between the syndicate of co-owners, the co-owners and your chosen construction professionals.

Rather than waiting to react to problems once they become urgent, take a proactive approach and establish a condominium roof renovation schedule based on signs of wear and tear, the age of the roof and the financial forecasts of the condo contingency fund.

By involving all stakeholders early in the planning process, you avoid costly emergencies, delays and unexpected disruptions.

Condo roof maintenance

Whether you’re a concerned condominium owner or a board member, understanding how roof maintenance works in a condominium will bring you one step closer to ensuring a safe and comfortable building for all residents.

Distinction between “shared common areas” and “private areas”

In a condominium, some building elements are shared by all co-owners, including corridors, staircases and the roof. Private areas, on the other hand, refer to the individual elements owned exclusively by each co-owner, including balconies, parking spaces and windows.

Maintenance responsibilities of the condo syndicate of co-owners

According to the Civil Code of Quebec, the condo syndicate is legally responsible for maintaining shared common areas, including the roof. This responsibility includes planning, organizing and supervising all repair and maintenance work on the roof.

However, co-owners also have maintenance responsibilities, which include maintaining and repairing their individual sections, such as units, windows, balconies etc.

Authorizing the work

Authorization to do condominium roof renovation must first be granted by the syndicate. The syndicate is generally made up of the assembly of co-owners and a Board of Directors. Each member’s decision-making power is proportional to their relative value in the co-op. For this reason, it is necessary to consider all the possible consequences that condominium roof renovation could have on both the condominium and its occupants.

To get approval for the work, consult the various members of the syndicate and set dates that suit as many people as possible. Once the general points have been discussed, a majority vote will determine the final decision.

Formalities and updates to the registration

The Board of Directors is responsible for ensuring compliance with building standards and regulations when the time comes for condominium roof renovations. The board is also responsible for managing financing, choosing professional roofers, negotiating and coordinating the work, and communicating with individuals on-site.

The board will also be responsible for ensuring the safety of all residents, and the integrity of the building. Any changes or modifications, including those required for roof maintenance, will have to be updated in the condo register, where applicable.

Finally, every aspect of the planning and execution of the work may be subject to change, according to the specifics of the deed of incorporation, the building by-laws and the description of the fractions (ownership rights).

Contingency condo fund

To finance condominium roof renovations and other major expenses, the syndicate of co-owners usually creates and manages a contingency fund. This fund is fed by monthly condominium fees paid by all co-owners.

Condo fees are calculated on the basis of various factors, including the estimated cost of major repairs and replacement of shared common areas. The syndicate of co-owners generally uses a predictive evaluation to estimate future costs for re-roofing and other necessary work.

The funds collected through condominium fees are then paid into the contingency fund to cover future expenses related to shared maintenance responsibilities.

Spending and financial planning

Whether you’ve been a co-owner for years or are new to this type of shared property, you pay what are commonly known as “condo fees” every month. This monthly charge usually covers all operating expenses, as well as your contribution to the residence’s contingency fund. As the building’s roof is considered a shared common area, this is the fund that will be used to finance condominium roof renovations.

If the condo fund is not sufficient to cover all the work, additional billing costs will be divided according to the value of each member’s private portion in relation to the total value of all the private portions of the property.

To save costs, it is never recommended to rely on friends or relatives to do roof repairs. Instead, call on experts to do condominium roof renovations and be sure to get several quotes so that you can compare possible contracts. This is the best way to get a good price without compromising on the quality of the work or the safety of the site. Remember, condominium roof renovations should never be carried out by amateurs.

Choose long-lasting, high quality condominium roof renovations from Duro-Toit

Condominium roof renovation is a complex process that requires meticulous planning and close collaboration between condo co-owners and the condo syndicate.

If you’re looking for condominium roof maintenance and repair experts, trust Duro-Toit. We have extensive expertise and commitment to quality, making us an ideal partner to ensure a durable, safe condominium roof repair that will maintain the value of your shared building.

When you choose Duro-Toit, you’re choosing a professional team that knows how to meet the specific needs of shared buildings. We’ll do everything in our power to deliver exceptional results. Contact our team to find out more about our roofing services.

Green Roof Benefits and Regulations

With growing environmental awareness and the need to rethink the way we build in urban areas, green roofs are emerging as an innovative, environmentally-friendly solution.

Also known as living roofs or vegetated roofs, these features offer remarkable ecological and economic benefits, harmoniously blending nature and urbanity.

In this article, our Montreal roofers present the different types of green roofs, explain the advantages they offer and outline how to maintain them.

What is a green roof?

Green roofs, also known as vegetated roofs or living roofs, are innovative architectural solutions that combine urban construction with natural vegetation.

Unlike traditional roofs that are covered in membrane or gravel, green roofs are covered, in whole or in part, with living plant vegetation. This garden-like cover transforms a roof into an oasis of green with remarkable environmental, economic and aesthetic benefits.

Types of green roofs

Green roofs fall into several categories, each adapted to specific objectives and varied contexts. The three main types of green roof are:

  • Extensive green roofs: These are characterized by a relatively thin layer of vegetation and hardy, low-maintenance plants. Typical species include grasses, mosses and succulents. Extensive green roofs are lighter and require less water and maintenance, making them suitable for larger buildings.
  • Intensive green roofs: Intensive green roofs feature a wider diversity of plants, including trees, shrubs and even entire vegetable gardens. This variant obviously requires more maintenance and a more robust support structure due to the increased weight of the vegetation and substrate.
  • Semi-intensive green roofs: These combine features of both extensive and intensive green roofs. They offer a greater variety of plants than extensive roofs, but require less maintenance than intensive roofs.

To find out which solutions are best suited to your building, contact our roofers today!

The components of a green roof

The structure of a green roof is made up of several interdependent components that work together to create a thriving ecosystem.

  • Substrate: The substrate is the artificial soil placed on the roof to support plant growth. It provides nutrients to the chosen plant species while draining water properly.
  • Plants: The species of plants you choose for a green roof depend on the type of roof and local environmental conditions. Roof plants must be able to thrive in specific rooftop conditions, which usually involve exposure to sun and wind, and significant temperature variations.
  • Drainage system: Green roofs require an effective drainage system to eliminate excess water and prevent stagnation. Proper drainage ensures that the substrate remains well aerated and that plants receive the right amount of water.

Green roof regulations in Quebec

In Quebec, green roofs represent a promising solution to mitigate the environmental issues associated with urbanization. However, the regulations governing these green installations are still under development. Here’s an overview of current legislation and the role played by the Régie du bâtiment du Québec (RBQ) in regulating green roofs.

The role of the Régie du bâtiment du Québec (RBQ) in regulating green roofs

Although roof construction legislation is not specific to green roofs, the Building Act and the RBQ Standard Guide for Selection, Installation, and Maintenance of Plants for Green Roof Systems provide guidance to ensure the safety and viability of these environmentally-friendly features.

Technical criteria and standards for green roof construction

The RBQ’s technical criteria are designed to ensure that green roofs are safe, functional and durable. These include ethe following:

  • Fire safety: Since vegetation is flammable, builders have to take measures to minimize the risk of fire and facilitate access for firefighters.
  • Load-bearing capacity: Green roofs impose an additional load on the building structure. The RBQ has established maximum permissible loads to prevent any risk of overloading.
  • Waterproofing and drainage: Builders must include provisions to prevent water infiltration and stagnation, which could damage the roof structure.
  • Maintenance: The technical guide includes recommendations for the regular monitoring and maintenance of green roofs, to verify that they are functioning efficiently.

What are the benefits of green roofs?

Although installing a green roof generally costs more than installing a traditional roof, even though you could be eligible for a green roof tax credit, there are many benefits to offset these costs.

Better rainwater management

Green roofs absorb almost 80% of rainwater in their soil. This water is later soaked up by the plants, eliminated slowly through the drainage layer, or it evaporates.

This process delays the flow of rainwater into the storm sewer system, which helps to stabilize groundwater levels, decreasing the peak load on the sewer system and reducing the risk of flooding. It also purifies the rainwater by removing various pollutants.

Increased biodiversity

The plants on a vegetated roof can provide an ideal habitat for various species of birds, butterflies and insects, which is particularly helpful in urban areas that are mostly made up of concrete and asphalt.

Improved air quality

Green roofs can combat air pollution, since plants filter the harmful airborne particles and gases emitted by cars and factories.

Mitigating the heat island effect

Green roofs reflect more sunlight and absorb less heat than traditional roofing materials. A living roof can help cool down urban areas in summer.

Reducing ambient noise, outside and inside the building

Vegetation provides excellent acoustic insulation for flat roofs, because it absorbs sound waves. It has been proven that a 12 cm thick layer of vegetation can reduce airborne sound by almost 40 dB.

So, a green roof can act as an acoustic barrier for your building by absorbing sound. This means it can help you provide a quieter environment both inside and outside your building.

More leisure space

A green roof provides additional space that can be used to create a vegetable garden or a terrace, or simply kept as a pleasant natural environment.

With access to a new open-air space that can be used for meetings or relaxation, your employees will be happier at work.

More energy efficient

Increasing the R-value (a measure of a material’s resistance to heat flow) of the roofing system and lowering the roof temperature reduces the building’s heating, ventilation and air conditioning needs, resulting in significant energy savings.

This also affects the lifespan of heating and air conditioning systems, because they will undergo less strain.

Over its estimated 40-year lifespan (another benefit), a green roof could help you save on a numerous expenses. Of course, the benefits of each green roof depend on design, geographic location, environment and the building itself.

Certified roofers are the best people to tell you what you really need!

Increased property value

A living roof can also increase property value, particularly in urban areas where green space is scarce.

With its 40-year lifespan, a green roof is an excellent selling point, because the future owner will probably not need to do any commercial roof repairs for a long time! Living roofs last longer because the plants protect the flat roof membrane from UV rays and extreme heat.

How to maintain a green roof

Maintaining a green roof is essential to ensure that it lasts a long time, functions efficiently and looks good. While offering many advantages, these types of roofs do require special attention according to the types of plants chosen and the season.

Maintenance according to the type of vegetation

Green roofs are home to a variety of plants, each with their own growing requirements. Before selecting plants for your roof, assess the amount of maintenance you’re prepared to do. Mosses and succulents are among the least demanding species, while a vegetable or flower garden will require more regular effort.

Watering frequency according to plant type

Watering frequency depends on the type of plants on your green roof. Some plants, like orpine, are drought-resistant and can survive without frequent watering. Others, like vegetables and flowers, will definitely require regular watering.

Pest management

Just like traditional gardens, green roofs can be vulnerable to pests and parasites. Grubs, insects and birds can damage vegetation. If you notice any signs of infestation, you’ll need to consult a landscaping professional who can identify the problem and implement appropriate prevention or treatment measures.

Protecting your green roof in winter

To ensure that your green roof lasts through the winter, choose plants adapted to your region’s climate (especially in Quebec). Cold-hardy species require less care when preparing for the winter season. You can be confident that your roof is designed to withstand winter conditions by following the recommendations of a professional.

Duro-Toit can answer your questions about green roofs

There is no sign that green roof popularity is going to diminish anytime soon. Living roofs offer so many advantages for commercial and residential buildings that they will continue to find a place in big cities like Montreal.

If you are interested in installing a green roof on your property, contact us today! Duro-Toit can help you throughout the process, via services like professional roof inspection to confirm that your building can accommodate a vegetated roof.

How Much Does a Flat Roof Cost?

When it comes to building or renovating a building with a flat roof, one of the first questions that comes up is: how much will it cost? By understanding all costs associated with installing a flat roof, you can plan a realistic budget and make good decisions.

In this article, our roofers present the different factors that can affect the price of constructing a new flat roof.

What does a flat roof cost per square foot?

The cost-per-square-foot approach is widely used in the construction industry to determine the price of a flat roof. This method offers a convenient way to compare prices and obtain a general budget estimate.

Based on the experience of our roofing contractors, the average cost per square foot for a flat roof in Quebec can vary from $10 to $40. This estimate is based on several factors, which we explain below.

The price of a flat roof, depending on the type of covering

The right flat roof membrane system guarantees that your roof will be waterproof and your building will be protected from the elements.

Homeowners have many choices when it comes to choosing the right flat roof membrane. Of course, there can be significant price differences between different types of roofing.

TPO membrane

TPO (thermoplastic polyolefin) flat roof systems consist of a single layer of synthetic material with a reinforcing grid. The TPO membrane is usually tacked down or fully adhered to the roof substrate.

This type of membrane stands out for its exceptional durability, and is usually guaranteed for 20 years. However, the quality of this membrane is greatly influenced by ambient temperature. In areas like Quebec where cold temperatures are common, the joints between membranes can become brittle. Even so, TPO membranes remain one of the best-performing membranes on the market, as long as it is installed correctly and used under the right conditions.

The average price per square foot for a TPO-coated roof is estimated at $15 to $25.

EPDM membrane

EPDM is an acronym for ethylene propylene diene monomer, a type of flat roof membrane used mainly for industrial buildings. The best way to imagine this material is to compare it to the inner tube of a bicycle tire.

Waterproofing is achieved with a single layer of membrane. Although it is durable, this roof coating is not recommended if there will be a lot of traffic on the roof. It can be installed in several ways: mechanically attached, fully adhered or held in place solely by the weight of the gravel.

Like TPO membrane, the average cost per square foot is between $15 and $25.

Multilayer asphalt and gravel membrane

This type of roof covering is composed of several layers of superimposed felts saturated with hot asphalt, which is then covered with gravel to slow the contraction or expansion of the asphalt during extreme temperature changes.

This inexpensive waterproofing membrane does, however, require recurrent long-term maintenance and the lifespan of this type of flat roof is generally shorter. The use of large quantities of asphalt in multi-layer roofing is also less environmentally friendly, as the extraction and processing of bitumen is energy-intensive and generates pollutant emissions. What’s more, asphalt is not biodegradable and contributes to the longevity of landfill waste once it has reached the end of its life.

The estimated price for this membrane is $12 to $18 per square foot.

Elastomeric membrane

Elastomeric membrane coating is considered one of the most durable roofing membranes, and the best for Quebec temperatures. This waterproofing system is composed of two plies of heat-welded modified bitumen membrane which can be installed at any time of year. Installing elastomeric membrane on a flat roof is often considered a good investment, as it requires little maintenance and has an excellent lifespan.

Although elastomeric membrane contains bitumen, it is a highly environmentally-friendly solution in the long term, thanks to its remarkable durability and resurfacing capacity. It’s both an economical and environmentally friendly choice. The cost per square foot is between $20 and $25.

Flat green roof

A vegetated roof or “green roof” makes it possible to grow plants on the roof of a building, which also regulates its temperature.

The cost includes the expense of the waterproofing membrane that must be installed underneath, and can vary from $10 to $30 per square foot.

Additional costs and fees associated with flat roofs

Beyond the cost per square foot and the choice of cladding, various elements can influence the overall budget of a flat roof project. Keep reading to learn more!

Minor or major roof renovation?

Flat roofs are very common in urban areas like Greater Montreal. Many residential and commercial buildings have flat roofs that were installed decades ago, but unfortunately, flat roofs do not last forever. They need to be renovated periodically so that they continue to function as an effective barrier against the elements.

Of course, a minor renovation to replace the covering will cost significantly less than a major renovation that involves replacing the entire roof system. The more components that need to be renovated (insulation, ventilation, adding skylights), the more expensive it will be.

The size of the flat roof

It goes without saying that the larger the roof is, the more expensive it will be to construct or renovate.

On the other hand, keep in mind that the surface area that requires covering does not include any obstacles on the surface. Also, the larger and taller the roof, the greater the challenge of installation and handling materials and debris. It’s important to consider costs related to labor and tools/equipment (e.g. hoists) required to carry out the work, in addition to permits to block streets, etc.

Roof structure and decking

A flat roof requires a structure and decking that will support the system and mechanical components.

For flat roof projects, prefabricated structural components such as roof trusses with a slight slope can sometimes be used to cut costs, because completely flat structures require tapered insulation.

Flat roof ventilation

Proper flat roof ventilation is vital to preserve the integrity of the building and prevent problems. The National Building Code of Canada lays out ventilation requirements that owners and roofing contractors are obliged to follow.

When renovating or constructing a flat roof, part of the budget must be allocated to ventilation.

Flat roof insulation

A flat roof must be properly insulated to keep the building at a reasonable temperature. Part of the renovation or construction budget must go to insulation.

Vented flat roofs must be paired with insulation that supports the ventilation system. Generally, the system will require fans placed in strategic locations, openings and insulation with a high R-value.

Unvented flat roofs, on the other hand, have no ventilation system in the attic and must therefore be insulated from above using rigid insulation panels placed directly on the vapour barrier.

There are many types of insulation products available at a wide variety of prices. To choose the right one, it is necessary to thoroughly assess the properties and characteristics of each product.

The location of the worksite

When a roofing contractor prepares a quote, they always consider the location of the worksite in their estimate.

For example, building a flat roof in a remote area may involve additional transportation expenses for equipment, materials and labour that will need to be included in the bill.

Also, replacing a flat roof at the top of a 10-storey building can be more expensive than replacing the roof of a duplex, because getting the necessary materials to that height is a complex task that may require additional equipment.

Roof maintenance

While flat roof maintenance costs are not part of the installation price, it’s still important to remember that keeping a roof in good condition requires some investment.

Flat roof maintenance includes regular inspections and occasional snow removal. Neglecting to care for a flat roof will inevitably shorten its lifespan.

The roofing contractor

Generally, the cost of materials is relatively consistent from one contractor to another. However, hourly rates can vary considerably. Some companies provide warranties, use certified labour and have an excellent reputation, while others do not. It’s generally worth paying a bit more for high quality roofing work. Beware of prices that are too good to be true!

Get a quote for your flat roof replacement with Duro-Toit

Are you considering having a flat roof replaced or repaired? There may be more factors to consider than you thought! Take the time to discuss your project with our flat roof experts—it’s the best way to get an accurate picture of the overall cost.

Contact our team to discuss your needs or request a quote for your roofing work.