- 819 777-7177
- info@toiturescossette.ca
- Licence RBQ:5697-7788-01
Cossette Roofing installs elastomeric membranes (SBS modified bitumen) for residential and commercial flat roofs in Gatineau, Ottawa, and the Outaouais since 2005. Lifespan of 35 to 40 years. Weighs half as much as gravel covering. Can be installed over existing bitumen roofs. Torch-welded by technicians. RBQ License 5697-7788-01.
An elastomeric membrane is a roofing covering made from bitumen, polymers, and fiberglass or polyester. It is a premium option for flat roofs, offering superior energy efficiency compared to traditional gravel covering and a lifespan of 35 to 40 years.
Elastomeric membrane weighs approximately half as much as gravel covering, reducing structural stress. If the existing roof is bitumen, the new membrane can be installed directly on top, speeding up the project. Membranes are available in different colors; lighter colors reflect summer heat.
Installation is performed by torch welding or specialized adhesive by technicians. Contact 819-777-7177.
An elastomeric membrane is a flat roofing system made from SBS (Styrene-Butadiene-Styrene) modified bitumen reinforced with fiberglass or polyester. It is installed by torch-welding layers together, creating a seamless, flexible, fully waterproof surface. SBS membranes are specifically engineered for cold climates — the SBS modifier keeps the membrane flexible at low temperatures, making it highly resistant to the freeze-thaw cycles that are common in Gatineau and Ottawa. Cossette has installed elastomeric membrane roofs since 2005 on both residential and commercial buildings throughout the Outaouais.
An elastomeric membrane roof can last several decades. A lifespan of 35 to 40 years is an estimate for favourable conditions, rather than a guarantee for every roof. In Quebec, freeze-thaw cycles, snow and ice, drainage, installation quality and maintenance all affect service life. Regular inspections of seams, flashings and drains, and prompt repairs, help protect the roof. A roof assessment and the selected membrane system provide the basis for a realistic lifespan estimate. Manufacturer and workmanship warranties have separate terms.
Yes, in many cases. If the existing roof is bitumen-based and structurally sound, a new elastomeric membrane can be installed directly over it, which speeds up the project and reduces disposal costs. This is not always possible — if the existing roof has significant water damage, structural deterioration, or multiple layers, full removal may be required. Cossette inspects the existing roof during the free evaluation and recommends the most appropriate approach for your building.
Both elastomeric membrane (SBS modified bitumen) and TPO (Thermoplastic Polyolefin) are excellent flat roofing systems, but they suit different needs. Elastomeric membrane is torch-applied, self-healing at minor punctures, and performs exceptionally well in cold climates like Quebec — it has decades of proven performance in the Outaouais region. TPO is heat-welded, highly reflective (good for energy efficiency in hot climates), and lighter in weight. Cossette installs both systems and recommends the best option during the free evaluation based on your building type, climate exposure, and budget.
Cossette Roofing holds RBQ License 5697-7788-01. Contact 819-777-7177 to discuss your flat-roof project, the proposed membrane system and installation method.
The cost of a flat roof replacement in Gatineau depends on the roof area, the existing roof condition, the membrane system chosen, and accessibility. Elastomeric membrane is generally priced per square foot and varies based on product grade and installation complexity. Cossette provides a detailed written estimate at no charge — the evaluation includes a full inspection of the existing roof, a recommended scope of work, material specifications, and a complete cost breakdown. Call 819-777-7177 or email info@toiturescossette.ca to schedule your free flat roof evaluation.