How to Patch a Hole in the Roof

A hole in your roof is never something to take lightly. Even a small opening can quickly lead to water infiltration, damage insulation, weaken the structure, and result in costly repairs. At Les Couvreurs Duro-Toit, we know how important it is to act quickly to protect your home or building in Montreal, Laval, the North Shore, or the South Shore.

In this article, we explain what to do immediately, how to identify the cause, and the different repair methods available.

What to do immediately if you discover a hole in your roof

Assess the urgency

If water is leaking in large quantities or seeping near electrical equipment, it’s an emergency. Contact a professional roofer right away to limit the risk of major damage.

Protect the inside of your home

While waiting for repairs, move furniture and valuables away from the leak. Place a bucket or tarp under the opening to collect water and reduce damage to your floors and walls.

Take photos of the damage

Capture clear pictures of the hole in your roof and any resulting damage. These will be valuable for your insurance claim.

What causes a hole in the roof?

A hole in your roof can have multiple origins. Here are the most common:

• Severe weather: strong winds, hailstorms, or falling branches.
• Natural wear and tear: over time, shingles or membranes weaken.
• Poor installation: improperly sealed skylights or chimneys can cause leaks.
• Structural issues: cracks in bitumen roofing or rust on a metal roof.

How to repair a hole in the roof

The repair method depends on the type of roofing material. Here are the most common solutions:

Asphalt shingles, tiles, or slates

• Replacing a tile or shingle: carefully lift surrounding elements, remove the damaged piece, and secure a new one.
• Small cracks: clean the area, apply roof sealant, smooth it out, and let it dry.

Flat roofs with elastomeric membrane

• Small holes: apply a bitumen patch or sealing spray.
• Larger leaks: full repair with hot welding or membrane section replacement.

Metal roofing

• Clean and sand the rusted area.
• Apply an anti-rust primer.
• Seal the hole with epoxy putty or a metal patch, then paint to protect against corrosion.

When should you call a professional roofer?

Some minor holes can be temporarily patched by a handy homeowner, but most situations require the expertise of an experienced roofer. This is especially true if you cannot identify the exact source of the leak, if the hole is large or already causing infiltration, or if the roof is difficult to access. Extra caution is also needed for commercial, industrial, or multi-unit building roofs.

At Les Couvreurs Duro-Toit, we provide fast and comprehensive service. Our team precisely identifies the source of the issue, carries out durable repairs in compliance with industry standards, and advises you on best practices to prevent future damage. Whether residential or commercial, we make sure your roof remains secure and long-lasting.