Quebec's preferred flat roofing system. Two-coat elastomeric membrane installation that delivers seamless waterproofing and outstanding durability through harsh winters.
Elastomeric membrane roofing is the dominant flat roofing system in Quebec, used on residential, commercial, and institutional buildings throughout the province. The system consists of two coats of liquid-applied elastomeric coating separated by a reinforcing polyester fabric, creating a monolithic waterproof membrane that bonds directly to the roof surface. This seamless application eliminates the joints and seams that are common failure points in sheet-based roofing systems.
The key advantage of elastomeric membrane in Quebec is its flexibility. The coating remains pliable across a wide temperature range, expanding and contracting with the roof substrate as temperatures shift dramatically between seasons. This flexibility prevents the cracking and splitting that rigid roofing materials can experience after years of freeze-thaw cycling. The reflective white or light-colored finish also provides energy benefits by reducing solar heat absorption during summer months.
Our installation process begins with thorough preparation of the roof surface. Existing membranes are evaluated for adhesion, blistering, and moisture content. The substrate must be clean, dry, and structurally sound before the first coat is applied. We apply a primer coat, followed by the first layer of elastomeric coating, then embed the reinforcing fabric while the coating is still wet. After the first coat cures, we apply the second coat to encapsulate the fabric completely and create the final waterproof surface. Detailing around penetrations, drains, scuppers, and wall junctions requires particular care, as these are the areas most vulnerable to water infiltration. We use compatible sealants and flashing materials at every transition point to ensure a watertight system from edge to edge.
Why this service
Seamless waterproof membrane with no joints
Excellent flexibility through freeze-thaw cycles
Reflective surface reduces cooling costs
Long service life with proper maintenance
Can be applied over some existing roof systems
The most proven flat roof system in Quebec
FAQ for this service
The process involves applying a primer to the prepared roof surface, then a first coat of elastomeric coating. While the first coat is wet, reinforcing polyester fabric is embedded into it. After curing, a second coat is applied over the fabric. The result is a seamless, monolithic waterproof surface.
With proper installation and regular maintenance, elastomeric membrane roofs in Quebec typically last 20 to 25 years. Some well-maintained systems exceed that. Annual inspections and prompt repair of any damage are important for maximizing lifespan.
In many cases, yes. If the existing roof surface is well-adhered, dry, and structurally sound, elastomeric membrane can be applied directly over it. This saves the cost and disruption of a full tear-off. However, a thorough inspection is needed to determine suitability.
Both are excellent systems. Elastomeric membrane is more common in Quebec residential applications because of its proven track record, seamless application, and ease of repair. TPO is often preferred for larger commercial roofs due to its factory-controlled sheet quality and heat-welded seams.
Annual inspection is recommended, ideally in spring after the winter season. Check for blisters, cracks, areas where the coating has worn thin, and condition of flashings around penetrations. Clear drains and scuppers of debris. Small repairs can be done with compatible patching products.