From modern flat-roofed homes to warehouses and mixed-use buildings, low-slope roofs fail differently than pitched roofs — ponding water, seam splits, and UV breakdown are the enemies. We install, replace, and repair heat-welded TPO, rubber EPDM, and modified-bitumen systems across Santa Clara County and the Peninsula, correct the drainage that causes leaks, and back the work with a manufacturer warranty.
A flat roof is a low-slope roof — typically pitched under 3:12 — that is waterproofed with a continuous sealed membrane like TPO, EPDM, or modified bitumen rather than overlapping shingles or tiles. Because these roofs drain slowly, they rely on a watertight membrane with heat-welded or bonded seams, tapered insulation that builds positive slope, and a reflective surface that meets California's Title 24 low-slope cool-roof standard. We handle both commercial low-slope roofs and the flat sections on Bay Area homes.
Built for both — the same crew that reroofs a San Jose warehouse handles the flat section over a home addition or modern residence.
Solves ponding water — we build tapered insulation and crickets so standing water drains within 48 hours instead of pooling and rotting the deck.
Cool-roof compliant — reflective white membranes meet Title 24's aged-SRI-75 low-slope minimum and cut rooftop heat load.
Minimal disruption — we phase the tear-off and keep every section dry overnight, so your home or business stays livable and open.
For most Bay Area flat roofs, TPO is the best all-around choice — its white, heat-welded surface reflects sunlight, meets Title 24 out of the box, and its welded seams are stronger than the membrane itself; EPDM is the pick when you want a long-lived, budget-friendly rubber membrane with excellent flexibility and impact resistance. TPO is a white thermoplastic that reflects solar heat; EPDM is a dark synthetic rubber (unless coated) whose glued or taped seams are the usual failure point between years 15 and 25. We spec the membrane to your roof size, rooftop equipment, foot traffic, and budget — and handle the San Jose permits and Title 24 paperwork.
You want maximum energy savings and Title 24 reflectance from day one. TPO's hot-air-welded seams create a monolithic surface with no adhesive to fail, and the bright-white membrane keeps rooftop HVAC and interiors cooler through South Bay summers. It is our default recommendation for new low-slope roofs.
You need a long-lived, budget-friendly rubber membrane with excellent flexibility and hail/impact resistance — common on roofs with heavy foot traffic or extreme thermal cycling. We can add a reflective coating so an EPDM roof still meets cool-roof goals.
Understanding the structural benefits and the maintenance realities of a flat roof helps you invest in the right system — and the right drainage — the first time.
We install and repair every major low-slope system — matched to your building, rooftop load, drainage, and budget — with manufacturer-backed 20–30 year warranties.
White, single-ply thermoplastic with hot-air-welded seams — the most reflective and popular low-slope system, and the strongest Title 24 performer.
A durable synthetic-rubber membrane that flexes through temperature swings and resists impact — an affordable, long-lived choice for high-traffic roofs.
Multi-ply, reinforced asphalt membrane — tough underfoot and reliable for smaller flat roofs, decks, and buildings with heavy rooftop traffic.
Reflective silicone/acrylic restoration coatings and tapered insulation that build positive slope to eliminate ponding — often extending a sound roof 10+ years.
A correctly installed low-slope membrane does more than stop leaks — it drains, it cuts cooling load, and it comes with a warranty you can hand to a lender, insurer, or property manager.
Tapered insulation, added crickets, and welded seams drain standing water within 48 hours — ending the ponding that adds weight, rots decks, voids warranties, and triggers the slow leaks flat roofs are notorious for.
A white TPO membrane meets the Title 24 low-slope cool-roof minimum (aged solar reflectance ≥ 0.63, aged SRI ≥ 75) and reflects most solar heat, easing the load on rooftop HVAC through 90°F+ South Bay summers.
As a manufacturer-certified installer we register No-Dollar-Limit (NDL) warranties covering both material and labor — documentation your lender, insurer, or property manager will ask for.
Built to keep your home or business running — we scan the roof, correct the drainage, and manage the permits and Title 24 paperwork from survey to final certification.
We map every ponding area and use thermal drone imaging plus electronic leak detection to find moisture trapped in the deck, then send a digital roof inspection report with a repair-vs-replace recommendation.
We spec the membrane, design tapered insulation and crickets for positive slope, pull the City of San Jose permit, and hot-air-weld a 100% watertight single-ply bond around every curb, drain, and skylight.
A 50-point quality inspection confirms Title 24 cool-roof compliance and watertightness, we water-test the seams, register your manufacturer NDL warranty, and leave the roof clean and documented.
Owens Corning Platinum Preferred Contractors — a status held by fewer than 1% of roofers nationwide — and manufacturer-certified installers for systems like Carlisle, GAF, and Firestone. We know the low-slope code requirements of the San Jose Community Development Department, offer 24/7 commercial roofing response, and coordinate directly with homeowners, property managers, and HOAs to keep everyone uninterrupted.
A real tear-off and replacement of a deteriorating flat-roof section on a mixed-use / residential structure — exposed wood-plank decking rebuilt with a bright, reflective single-ply membrane.
We provide specialized flat-roofing solutions — from industrial TPO to residential low-slope membranes — throughout the South Bay and Peninsula, and we handle the specific permitting and Title 24 requirements of each municipality.
San Jose, Sunnyvale, Cupertino, Santa Clara, Mountain View, and Campbell.
San Mateo, Menlo Park, and Redwood City.
Fremont, Milpitas, and Hayward.
A 5.0-star average across 152 Google and 162 Yelp reviews — from homeowners, HOAs, and facility managers across San Jose and the Peninsula.
"Lifetime Roofing exceeded all expectations. Their handling of complex HOA requirements was exceptional — they became my advocates."
"Tony and his team were amazing for our new roof. Clean-up every day was impressive, and the workmanship was exactly as promised."
"We had a partially flat roof with a major leak. Tony and Dylan came up with great solutions and didn't try to oversell us."
There is no flat per-square-foot price, because cost depends on roof size, the membrane you choose (TPO, EPDM, or modified bitumen), the number of rooftop penetrations, the drainage and tapered-insulation design, tear-off, and access. Rather than a ballpark phone quote, we provide a detailed, itemized estimate after a free on-roof inspection so the number reflects your actual roof.
EPDM often edges out TPO on raw lifespan, but most EPDM failures happen at the glued or taped seams between years 15 and 25. Quality TPO installs are very durable because the seams are heat-welded into a single continuous surface. Installation quality matters more than the material label, which is why manufacturer-certified welding is critical — and why we spec the membrane to your specific roof.
Ponding happens when a low-slope roof lacks enough pitch or has settled, so water sits instead of draining. It is a real problem: standing water accelerates membrane breakdown, adds weight, and voids many warranties if it remains longer than 48 hours. We correct it by installing tapered insulation and crickets to build positive slope and by adding or relocating drains.
Yes. California Title 24 requires nonresidential low-slope roofs to use a cool-roof surface, meaning an aged solar reflectance of at least 0.63 and thermal emittance of at least 0.75, or an aged SRI of at least 75. A white TPO membrane meets this out of the box, and we document CRRC ratings and pull the San Jose permit so the roof passes inspection.
Yes. The same specialist crew installs and repairs low-slope roofs on warehouses, offices, and mixed-use buildings as well as the flat sections and modern low-slope roofs on Bay Area homes. We match the membrane and drainage design to the building, and for larger properties we offer 24/7 commercial roofing response.
Often, yes. If the membrane is generally sound and the deck is dry, we can re-flash penetrations, weld new membrane over failed seams, or apply a reflective restoration coating that adds 10 or more years. When moisture is trapped in the deck or the roof is at the end of its life, replacement is the sounder investment. Our free inspection tells you honestly which one you need.
Get a free, no-obligation flat-roof estimate from San Jose's Owens Corning Platinum Preferred team. We spec the right TPO, EPDM, or modified-bitumen system, correct the drainage, handle Title 24 and permits, and keep your home or business open.
Flat and low-slope roof replacement (TPO/PVC single-ply) in the Bay Area generally starts around $15,000+ and scales with the roof's square footage, membrane, and insulation. Because flat roofs are priced by area and system type, the range is broad.
What moves the price:
These are Bay Area ranges, not quotes — flat-roof pricing is especially size-dependent. Book a free inspection for an exact figure.
