In Quebec, two-ply elastomeric is the most common flat roof membrane for homes: very tough, it lasts 25 to 40 years. TPO is a white single-ply membrane, light and reflective, ideal where a light-coloured roof is required. EPDM is a flexible rubber sheet that’s easy to patch. The right choice depends on your roof, budget and borough rules.
At a glance
| Elastomeric | TPO | EPDM | |
|---|---|---|---|
| Build | Modified bitumen, 2 plies | Thermoplastic, 1 ply | Synthetic rubber, 1 ply |
| Price | $9.50 to $15 / sq ft | $7 to $12 / sq ft | $9 to $12 / sq ft |
| Lifespan | 25 to 40 years | 15 to 35 years | 15 to 35 years |
| Colour | Many, including white granules | White, very reflective | Usually black |
How to choose
- Montreal plex: light-coloured elastomeric is often the best mix of toughness and compliance.
- Rooftop deck or foot traffic: elastomeric resists punctures better.
- Tight budget, large area: TPO is often the most affordable.
- Simple shapes, building movement: EPDM is a good option.
Budget it with our flat roof cost guide and check the white roof rules.
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Indicative prices before taxes, based on Quebec ranges in 2025 and 2026. Always compare written quotes.