Frequently Asked Questions

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Why is it important to protect the storm drain from ice?

Ice can affect the integrity of the building, causing water infiltration. You must clear the drain of ice so that it does not clog. When blocked by ice, water accumulates and creates backups.

How do you prevent water seepage?

An efficient roofing system will not be exposed to the risk of water infiltration. Ideally, it is necessary that the entire system is in good condition, including the ventilation and insulation. Recommended maintenance include snow and ice removal and regular inspections.

How do you spot a water entry point on a flat roof?

In the case of a steel deck, one can follow the grooves to easily identify the entry point. If you find that water has infiltrated, please consult our specialists roofers, especially in the case of a rooftop terrace or green roof.

What covering is to be avoided for flat roofs?

There is no bad type of coating. The key is to select the proper coating in recognition of the needs of the building. For example, it is advisable to opt for a more flexible membrane when the building structure is given to change in reaction to temperature changes. In the case of a roof terrace or a green roof, it is best to check with an consultant.

What is the most durable covering for flat roofs?

Specifically for the temperatures in Quebec, the best choice is the two-layer elastomer. It consists of two hot-melted modified bitumen membranes. It is recommended to use this system for flat roofs and green roofs.

How to determine ventilation requirements according to the type of roof?

Manufacturers have specific factors that they measure to provide the best diagnosis based on the type of roof, as in the case of a rooftop terrace or green roof. These factors are, for example, the spacing available in the attic, the number of square feet of insulated ceiling, and the configuration of the attic. For more information, see our technical consultants. They will inform you on the ventilation requirements for your type of roof.

How to ventilate the house if it does not have enough air space?

You can modify the structure to create an air vacuum which promotes better circulation in the attic. Otherwise, you can simply replace the existing insulation by using an insulator with a high R-value, such as polyurethane. This solution will significantly increase the resistance of the insulation in the attic.

What is the best insulation system?

To date, polyurethane is one of the best performing products. It allows you to attain a high R-value in a narrow spacing. It also acts as an air and vapour barrier. As regards thermal roofs, polyisocyanurate panels are among the most efficient on the market.

How to calculate the R-value of the insulation?

The insulation requirements vary depending on the building system. It is suggested to consult the description sheet to know the R-value of the insulation. The data may vary in case of a rooftop terrace or green roof.

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