Houston flat roofing contractor for Houston. Residential additions, modern architectural styles, garage roofs, and small commercial properties. TPO heat-welded, EPDM rubber, and modified bitumen torch-down. Single source for any flat or low-slope section.
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Flat roofing (technically low-slope, with engineered drainage slope of at least 1/4″ per foot) is the right answer for residential additions, modern architectural styles with flat sections, garage roofs, sun rooms, and small commercial buildings. The materials and installation methods are entirely different from sloped residential roofing.
Three main material categories. TPO (thermoplastic polyolefin) is the modern standard — white, heat-reflective, heat-welded seams, 20-30 year life. EPDM (rubber) is the older standard — black, lower cost, glued or fastened seams, 30-40 year life with maintenance. Modified bitumen is asphalt-based, applied with torches or cold-process, traditional choice for older buildings.
The installation is specialty work. Drainage planning is the most important factor — water that ponds for more than 48 hours fails any flat roof regardless of material. Seam quality is the second factor — most flat roof leaks happen at seams. Flashing at penetrations (drains, scuppers, HVAC, vents) is the third. Done right, flat roofs are reliable; done wrong, they leak constantly.
Modern white-reflective single-ply membrane with heat-welded seams. Best energy performance (reflects 70-80% of solar heat) and strongest seam integrity. Most common new Houston install.
Black rubber single-ply membrane. Lower cost than TPO, longer life with maintenance, but absorbs heat. Older standard; still used widely on commercial and some residential.
Asphalt-based membrane applied in 2-3 layers, torch-applied or cold-process. Traditional flat-roof material. Heavy and durable; aesthetic match for older buildings with existing modified bitumen.
Houston rain volume. 50+ inches of annual rainfall, with intense individual events (4″+ hourly rates during major storms). Drainage capacity matters more than any other design factor. We size drains, scuppers, and overflow paths for worst-case rain events, not average ones.
Houston heat. Flat roofs reach surface temperatures of 160°F+ in summer. White TPO reflects most of that; black EPDM absorbs it. The choice has real implications for AC load and roof aging.
Wind exposure. Flat roofs handle wind differently than sloped roofs — less uplift typically, but wind can drive rain horizontally into seams and flashings. Quality of seam welding and flashing detail determines wind survivability.
Maintenance is non-negotiable. Flat roofs need annual inspection — debris cleared from drains, seams checked, flashings verified. Our maintenance program covers this on flat roof customers; ad-hoc flat roof owners need to schedule it themselves.
TPO is white, reflective, heat-welded seams; best for energy efficiency and modern installs. EPDM is black rubber, glued or fastened seams; lower cost but absorbs heat. Modified bitumen is asphalt-based, torch-applied, traditional flat roof material. All three work; TPO is most common for new Houston installs.
Properly installed flat roofs don’t leak any more than sloped roofs. The key is drainage planning, seam integrity, and proper flashing at penetrations. Leaks usually trace to installation shortcuts, not the material itself.
20-30 years typical for TPO and modified bitumen; EPDM can last 30-40 with proper maintenance. The life depends heavily on installation quality and ongoing maintenance.
No — flat roofs are technically ‘low-slope,’ designed with at least 1/4″ per foot drainage slope. Truly flat roofs would pond water and fail quickly. The slope is engineered to drain to specific points (scuppers, drains).
Yes for inspection and maintenance, with caution. Don’t walk on hot bitumen. Don’t walk on TPO with sharp objects in your shoes. Some homeowners finish flat roof sections as roof decks — that requires specific structural and drainage planning.
Yes, with proper drainage. Flat residential sections are common over additions, garages, and modern architectural styles. The structural and drainage details need to be designed correctly for Houston rain volume.
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