
A brown stain on the ceiling, dripping water, a musty smell settling in... a leak doesn't give you a warning. It often happens at the worst possible time: in the middle of the night, during a heavy rain, or right after a rapid snowmelt. The good news is that there are concrete steps you can take immediately to limit the damage before a qualified roofer arrives. This article explains what to do, step by step, without getting bogged down in technical details.
Water is silent, but its effects accumulate quickly. What you see on the ceiling is often just the tip of the iceberg. Moisture can seep into the insulation, joists, and walls for days before becoming visible.
According to the Canada Mortgage and Housing Corporation (CMHC), excessive humidity promotes mold growth within 24 to 48 hours of exposure. The longer you wait, the more extensive the repairs are likely to be.

Start by moving furniture, electronic devices, and valuables away from the affected area. Place containers, towels, or a tarp to collect the water. If the ceiling is swollen or bulging, pierce a small hole in its center with a screwdriver to allow the water to drain in a controlled manner, which prevents it from collapsing suddenly.
If water is leaking near a light fixture, an outlet, or an electrical panel, cut the power to that area immediately. If in doubt, turn off the main circuit breaker. This is a simple precaution that can prevent many complications.
Then take photos and videos of everything you see : the ceiling, walls, floor, and damaged items. Note the time and date. These elements will be essential for your insurance claim and to help the roofer to understand the extent of the damage.
From the outside, check if you can see any missing shingles, a lifted membrane, or accumulated debris. But do not go onto the roof yourself. Wet surfaces are slippery, and without proper equipment, you risk unknowingly worsening the damage.
Finally, contact a certified roofer the as soon as possible. In Quebec, every roofing contractor must hold a license from the Régie du bâtiment du Québec (RBQ). Always verify that the professional is in good standing before entrusting them with the work.
Some instincts, however well-intentioned, can complicate the situation :

Once the situation is resolved, a qualified roofer can propose a maintenance plan tailored to your roof. Regular inspections, twice a year ideally (in spring and fall), allow you to spot warning signs long before they become costly.
The Consumers' Association for Quality in Construction (ACQC) recommends having your roof inspected after major weather events such as hailstorms, strong winds, or intense freeze-thaw cycles. Regular maintenance remains the best way to avoid unpleasant surprises.
With the right approach, you can handle a leak without panic and without making the situation worse. Contain the water indoors and call a certified roofer quickly – that's all you need to do. The rest is their job.
If you're dealing with a leak and don't know where to start, our team can guide you every step of the way. Contact us for a quick assessment and advice tailored to your home.