The 35–40 year lifespan of an elastomeric membrane system assumes: a complete two-layer system with a granulated cap sheet, proper installation by torch welders, adequate drainage (no chronic ponding), correct flashing at all penetrations and perimeter walls, and periodic inspection
A quality asphalt shingle roof in Gatineau costs roughly $10,000–$14,000 and lasts 25–35 years. Metal roofing costs $18,000–$28,000 and is permanent. Over 60 years, two shingle replacements at increasing costs total $25,000–$35,000+ — while one metal roof installation stays fixed.
Metal roofing was the dominant roofing material in rural Quebec for generations, for good reason. Pre-painted galvanized steel performs exceptionally well in the province’s freeze-thaw climate. Key advantages include: permanent lifespan with no replacement needed; natural snow shedding that reduces
Pre-painted galvanized steel roofing does not have a defined end-of-life under normal conditions. It doesn’t granulate, rot, absorb water, or crack under freeze-thaw stress. The factory-applied paint coating carries a 40-year fade and chalk warranty on quality products. Structurally, a
Ice dams form when heat escaping through the attic warms the roof deck and melts snow. The meltwater runs down to the cold eaves, where it refreezes. As the ice builds, it traps subsequent meltwater, forcing it back under shingles
In Quebec, all roofing contractors must hold an active RBQ (Régie du bâtiment du Québec) licence. You can verify any contractor’s licence at rbq.gouv.qc.ca. Beyond the mandatory licence, look for: BBB accreditation, established local history (5+ years in the Gatineau-Ottawa
Standard bitumen membranes become brittle in cold temperatures and can crack under freeze-thaw cycling. SBS (Styrene-Butadiene-Styrene) polymer modification gives elastomeric membranes their key property: they stretch and recover rather than crack. In Gatineau’s climate, where rooftop temperatures swing from -30°C