Bay Area Flat Roofing

We serve six Bay Area counties — Alameda, Contra Costa, Marin, Napa, San Mateo, and Santa Clara — covering 47 cities from Oakland to San Jose. Our crews are based in Castro Valley, putting us within 45 minutes of every city we serve. We handle permits and know the building codes for each jurisdiction, which matters because requirements and fees vary significantly between cities.

We offer $0-down financing with approved credit, 12-month same-as-cash plans, and extended terms up to 15 years for larger projects. You only pay for completed, inspected work — we never ask for full payment before the job is done. Your project manager will walk you through every option during your estimate appointment. We also accept checks, ACH, and all major credit cards.

Yes. CSLB License #1078806 — verify it anytime at cslb.ca.gov. We carry $2M general liability, full workers’ comp, and are bonded per California law. We hold GAF Master Elite, Owens Corning Preferred, CertainTeed ShingleMaster, and James Hardie Elite Preferred certifications — each requires annual training and quality audits to maintain. We’re happy to provide proof of insurance before any work begins.

Most exterior projects in the Bay Area require a building permit. Fees vary by city — Oakland runs $200–$600, Peninsula cities often more. We handle the entire permit process: application, plan submission, and scheduling inspections. Permit fees appear as a separate line item in your estimate so you’ll see every cost upfront. For homes in WUI fire zones (Berkeley Hills, Oakland Hills, parts of Marin), we ensure full compliance with local fire-rated material requirements.

GAF Ruberoid torch-down, an SBS modified-bitumen membrane applied in multiple plies and heat-welded at the seams. It is built for low-slope surfaces where water drains slowly.

A properly installed multi-ply modified-bitumen roof commonly lasts 20 to 30 years here, depending on drainage, sun exposure, and maintenance. Correcting ponding at install time is the single biggest factor in longevity.

Ponding usually means the roof lacks enough slope to a drain or the drains are blocked. We correct slope and drainage as part of the install rather than just laying new membrane over the same low spots.

Yes. Because we install the full GAF line, we handle the flat membrane and the sloped GAF shingles as one project and detail the transition between them correctly.

Each has a place. Torch-down's multi-ply build adds redundancy and stands up well to ponding and temperature swings, which is why we use GAF Ruberoid on Bay Area low-slope roofs.

California Title 24 requires cool-roof performance on many low-slope roofs. We build to current code, including reflective cap sheets or coatings where they apply.