What Is the Best Roof for a Flat or Low-Slope Home?
Asphalt shingles shouldn't be used below a 2:12 pitch. For flat and low-slope residential roofs, the best options are TPO (reflective, heat-welded seams), EPDM (durable rubber membrane) and modified bitumen (multi-ply, tough surface). The right choice depends on slope, foot traffic, drainage and budget.
Modern and mid-century homes, porch roofs, sunrooms, additions and garages often have sections too flat for shingles. Shingles on a low pitch are a common source of leaks after heavy Front Range snowmelt. A properly detailed membrane roof solves the problem.
Low-slope systems we install on homes
- TPO — single-ply membrane with heat-welded seams; white TPO reflects summer sun.
- EPDM — proven rubber membrane that handles Colorado temperature swings well.
- Modified bitumen — multi-ply SBS or APP asphalt system, great where there's foot traffic, such as roof decks.
- Tapered insulation — to add slope and eliminate ponding water.
Tie-ins and details
Most residential leaks happen where a flat section meets a pitched roof or a wall. We flash those transitions carefully, and because we also install shingles, metal and tile, one crew handles the whole roof.
Own a commercial building? See our commercial roofing services.
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