Residential Flat Roofs
Installation and replacement of smaller residential flat roofs: garages, additions and flat sections of a home.
Flat roofs require specific expertise to ensure proper drainage and perfect waterproofing. Our flat-roof work is limited to smaller residential flat roofs: attached garages, home additions and extensions, and flat sections of a house. On every job, we choose the materials and finishing details best suited to your home and budget.
Problems we solve
- Standing water pooling on your flat roof after every rain.
- Membrane visibly worn, cracked or blistered.
- Roof drains blocked or poorly positioned.
- Intermittent leaks hard to pinpoint.
- Membrane past its service life (15–25 years depending on material).
Residential flat roofs: a real waterproofing system
A flat roof is never truly flat: there's always a slight slope (2% minimum) to drain water toward the drains. That slope, combined with a quality waterproofing system, is what protects the home from leaks.
We install and replace flat roofs on homes: attached garages, additions and extensions, and flat sections of a house. Our preferred system is two-ply welded elastomer membrane, which offers the best durability-price-performance combination for the Quebec climate.
Diagnosis before the work starts
Before any replacement work, we inspect your flat roof in detail: deck, insulation, drains, penetrations and the tie-in to the house wall. Often the deck and insulation are still in good shape and can be kept, which significantly reduces the cost of the work.
In other cases we find that the insulation is water-saturated (a common problem when a leak has been tolerated too long). In those situations, we explain the options clearly: replace the insulation along with the membrane, or do a partial removal depending on what the situation calls for.
Our goal is to help you make the right call based on the facts, not to sell you a full replacement when a more targeted repair would do the job.
Flashings, tie-ins and the details that matter
The weak spots on a flat roof are almost never in the middle of the field. They're the transitions, the tie-in to the house wall, drains, penetrations and flashings. That's where 90% of leaks happen, and that's where we focus the most.
We weld membrane returns onto walls and edges with generous overlap, and we custom-fabricate the metal flashings around every penetration (vents, plumbing stacks, gas pipes).
Every detail is built to last: simple steps, but they take experience and care to execute right.
Why choose Toitures Boulet
- Two-ply welded elastomer membrane, the most proven system for residential flat roofs in Quebec.
- Slope and drainage analysis: we often fix the causes, not just the symptoms.
- Controlled torch and professional welding on fused membranes: zero fire risk, perfect seal.
- Material + workmanship warranty, with before/after photo reports for your records.
Our process
From your first call to the final warranty — clear, transparent, no surprises.
- 1
Contact & on-site inspection
We respond to your request within 24 business hours and schedule a free on-site visit to assess your roof and understand your goals.
- 2
Written, itemized estimate
You receive a clear, line-by-line estimate with no hidden fees. It remains valid for 90 days and covers materials, labour, and applicable warranties.
- 3
Project scheduling
Once the estimate is approved, we agree on an approximate date and order materials. We confirm the exact date closer to the work based on weather and current scheduling.
- 4
Professional execution
Our crews work methodically and safely, protect your property with tarps and plywood, and stick to the agreed timeline.
- 5
Cleanup, final inspection & warranty
We sweep every nail with a magnet, do a final walkthrough with you, and issue your warranty documents. Your project is fully complete.
What's included
FAQ
Why does my flat roof pond water?+
Poor drainage, blocked drains or deck sagging are the main causes. An inspection will identify the source and we'll propose a lasting solution.