SBS modified bitumen has been the dominant commercial flat roofing system in Quebec for decades. Its track record in the Outaouais’s freeze-thaw climate is well established. For commercial buildings in Gatineau, retail, office, light industrial, and multi-residential, a two-layer SBS system delivers 35–40 years of waterproofing performance with minimal maintenance requirements.
TPO Membrane: Best for Large Roofs and Energy Performance
Thermoplastic polyolefin (TPO) is a single-ply membrane heat-welded at seams. Its white or light-coloured surface reflects solar radiation significantly, reducing cooling loads on large commercial buildings. TPO is the preferred system for commercial buildings with rooftop HVAC equipment and high summer energy costs. Seam integrity relies on consistent heat-welding technique, Cossette uses trained technicians for all TPO installations.
Commercial Metal Roofing for Sloped and Specialty Applications
Commercial buildings with sloped roofs, warehouses, agricultural buildings, churches, and industrial facilities, benefit from standing seam metal roofing in the Outaouais. It offers a permanent lifespan, minimal maintenance, and excellent snow shedding performance. Cossette installs commercial metal roofing across the Gatineau-Ottawa region.
Roof Ventilator Efficiency on Commercial Buildings
Commercial flat roofs in the Outaouais frequently have underperforming ventilators, seized units, inadequate numbers for the building’s square footage, or improper sealing around the curb. Cossette’s commercial roofing team assesses ventilator performance and replaces units as required, improving both energy efficiency and moisture management in the building.
Frequently Asked Questions
Does Cossette handle large commercial roofing projects in Gatineau?
Yes. Cossette’s commercial roofing team handles projects from small retail units to large industrial and multi-residential buildings across Gatineau, Ottawa, and the Outaouais. Commercial emergency service is available 24/7.
What is the difference between SBS and TPO for commercial flat roofs?
SBS is torch-applied in two layers — thicker, more impact-resistant, with a longer track record in Quebec. TPO is a single-ply heat-welded membrane — lighter, more reflective, and better suited to very large roofs where energy performance is a priority. Cossette recommends the appropriate system based on building type, size, and client priorities.
Can Cossette work on a commercial roof without disrupting the business?
Yes. Cossette coordinates commercial roofing schedules with business operations — including phased sequencing, early-start mornings, and minimizing noise during business hours where possible. This is discussed and planned before work begins.