Flat and low-slope roofing
for Central Valley & East Bay properties.
TPO, EPDM, modified bitumen, built-up roofing, and liquid-applied systems. NuShake handles commercial warehouses, low-slope residential, and patio covers across the Central Valley & East Bay — with Title 24-compliant options standard.
Get a free flat roof estimate.
Takes 30 seconds. No obligation.
- ✓ Licensed — CSLB #1142280
- ✓ 5 manufacturer certifications — GAF, Owens Corning, CertainTeed
- ✓ Written quote — before any work
- ✓ No high-pressure sales — ever
Quick answer
Flat roofing covers low-slope roofs on warehouses, additions, and patio covers. NuShake installs TPO, EPDM, modified bitumen, built-up, and liquid-applied systems, with cool-roof options that meet California's energy code. Call (209) 253-0506 for a free estimate.
Which flat roofing system fits your project?
Flat roofing is not one system. Each membrane has different cost, durability, and energy performance tradeoffs. NuShake recommends based on your building type, climate zone, and budget — not on which system carries the highest margin.
Flat roofs work harder in the Central Valley than in most of California. Summer highs of 100–105°F bake dark membranes and speed up cracking. Most Valley cities sit in climate zones 12 and 13, where Title 24 (California's energy code) requires reflective cool-roof products on most low-slope re-roofs. Valley dust and orchard debris clog drains and scuppers (roof-edge drain openings), so ponding shows up faster here. Tule-fog winters keep membranes damp for weeks at a time, which makes welded seams and sound flashing (the metal sealing joints and edges) matter even more.
TPO Single-Ply
Thermoplastic polyolefin — the most common commercial flat roofing system in California. White or light-colored TPO reflects solar radiation, which qualifies it as a Title 24 cool roof without added coatings.
- Best for commercial and large flat residential
- White surface meets Title 24 cool-roof requirements
- Heat-welded seams — stronger than glued seams
- Lifespan: 20–30 years
- Cost: quoted per project after a free estimate
EPDM Rubber
Ethylene propylene diene monomer — a black synthetic rubber with a long track record. Some EPDM roofs installed in the 1980s are still performing. The black color absorbs heat, which is a drawback in Central Valley summers but can be coated white.
- Excellent long-term durability
- Puncture-resistant
- Can be coated white for heat reduction
- Lifespan: 20–25 years
- Cost: quoted per project after a free estimate
Modified Bitumen (Mod-Bit)
Asphalt-based membrane reinforced with fiberglass or polyester. Torched or self-adhered. A good choice for residential low-slope roofs and smaller commercial projects. More forgiving for repair than single-ply systems.
- Good choice for residential additions
- Easier to repair locally than single-ply
- Lifespan: 15–20 years
- Cost: quoted per project after a free estimate
Built-Up Roofing (BUR)
Multiple layers of asphalt-saturated felt topped with gravel or a mineral cap sheet. The multi-layer system is highly durable and redundant — a puncture in one layer does not immediately cause a leak. Common on older commercial buildings.
- Multi-layer redundancy
- Excellent for high-traffic roofs
- Lifespan: 20–30 years
- Cost: quoted per project after a free estimate
Liquid-Applied Systems (Silicone and Acrylic)
Applied like paint over an existing membrane. Silicone is the premium option — it withstands ponding water without degrading and lasts 15+ years. Acrylic is more affordable but not suited to areas with standing water. Liquid coatings are covered in depth on the Roof Coating page — this is the right choice when the existing membrane is in sound condition and you want to extend its life rather than replace it.
Where NuShake installs flat roofing
Commercial warehouses and industrial
Stockton, Tracy, and Manteca have a high concentration of warehouses and distribution centers. TPO and BUR are the standard systems for these buildings. NuShake serves the north San Joaquin industrial corridor.
Commercial flat — retail and office
Strip malls, office parks, and small commercial buildings throughout the East Bay and tri-valley. We handle both full replacements and multi-section re-roofing to minimize tenant disruption.
Low-slope residential additions
Home additions with low slope — sunrooms, in-law units, rear extensions — often cannot use asphalt shingles. Modified bitumen or TPO is the right call on these projects.
Patio covers and carports
Freestanding patio covers and attached carport roofs with minimal pitch. Mod-bit and EPDM are common here — easy to detail around posts and edges with limited flashing complexity.
Solar-ready flat roofs
A new TPO membrane paired with ballasted solar racking is one of the cleanest solar installations available. No penetrations through the membrane. NuShake's GAF Solar Certified status means we handle both the roof and the solar under one project.
Multi-family residential
Apartment buildings and fourplexes with flat or low-slope roofs in Stockton, Lodi, and the East Bay. We work with property managers on phased re-roofing to keep units occupied during work.
How NuShake prices flat roofing
Flat roofing is quoted per project after a free estimate — there's no fixed rate. Your written quote reflects the system you choose, roof size and access, tear-off, insulation board, membrane, seaming, and any drain work. Every line is itemized, with no surprise charges at close.
Modified bitumen
Most economical
- Most affordable flat system
- Good for residential additions
- 15–20 year lifespan
TPO single-ply
Most popular for commercial
- Title 24 compliant (white)
- Best for commercial
- 20–30 year lifespan
EPDM / BUR
Maximum durability
- Maximum durability
- Multi-layer redundancy (BUR)
- 20–30 year lifespan
Drainage improvements, tapered insulation, and complex penetration flashing are quoted separately if required. All NuShake quotes are itemized in writing — no surprise line items at close.
Our flat roofing process
| Free estimate and drainage assessment. We walk the roof, map existing drains and scuppers, check for ponding areas, and assess membrane condition. You get a written report and system recommendation. |
| System selection and permitting. We recommend the right system for your building type and climate. NuShake pulls permits for your jurisdiction — Bay Area, Sacramento, or San Joaquin County. |
| Tear-off and deck inspection. The old membrane and insulation are removed. The deck is inspected for moisture damage. Any wet or damaged insulation is replaced before new material goes down. |
| Insulation board and membrane installation. Tapered insulation is installed where drainage needs improvement. The new membrane is installed and all seams are heat-welded (TPO) or torched (mod-bit). All penetrations and edges are flashed and sealed. |
| Final inspection and warranty documentation. We schedule the city or county final inspection. You receive manufacturer warranty documentation and our workmanship warranty in writing. |
What makes NuShake the right flat roofing contractor
Title 24 expertise for California code
California's Title 24 energy code requires cool-roof-compliant products on most commercial re-roofing projects. NuShake specifies Title 24-compliant TPO by default on commercial flat work. We do not let code compliance catch you off guard at permit inspection.
GAF Solar Certified — flat roof + solar combination
If you are planning a solar array on a flat commercial or residential roof, NuShake can handle both the new membrane and the solar installation under one contract. Ballasted racking on a TPO membrane is one of the cleanest installations available — no penetrations, no warranty conflicts.
Honest repair-vs.-replace assessment
Not every flat roof needs to be replaced. If the membrane is in sound condition, a coating or targeted repair can extend its life by 10–15 years at a fraction of replacement cost. We tell you what your roof actually needs — not what generates the largest invoice.
Commercial corridor experience
NuShake serves the industrial corridor from Stockton through Tracy and Manteca — one of the fastest-growing logistics and distribution markets in California. We understand flat commercial timelines, multi-phase projects, and tenant-occupied re-roofing requirements.
Common flat roofing questions
Get a free flat roof estimate.
NuShake serves commercial and residential properties across the Bay Area and Central Valley. We assess your roof, identify the right system, and give you a written quote with no pressure.
CSLB #1142280 • Mon–Fri 8am–5pm • office@nushake.com