Flat Roof Systems

The Bay Area has one of the highest concentrations of flat-roof homes in the country, thanks to the Eichler legacy. Thousands of mid-century modern homes in Mountain View, Sunnyvale, Palo Alto, San Mateo, and Cupertino feature low-slope and flat roofs that require specialized membrane systems — not the shingles or tiles that work on pitched roofs. We are flat roof specialists with deep experience in the three leading membrane technologies: TPO, EPDM, and PVC.

Choosing the right membrane system for your flat roof is critical, and the decision depends on your specific situation. TPO (Thermoplastic Polyolefin) is our most popular recommendation for residential flat roofs — it is energy-efficient, cost-effective, and carries a white reflective surface that meets California Title 24 requirements. EPDM (rubber roofing) is the proven workhorse with a 50-year track record, ideal for homeowners who want the most time-tested option. PVC is the premium choice, offering superior chemical resistance and the longest seam integrity of any membrane.

Beyond material selection, flat roof performance depends on drainage engineering. Standing water is the enemy of any flat roof, and the Bay Area's winter rainy season puts drainage design to the test. Every flat roof we install includes a comprehensive drainage plan with proper slope-to-drain calculations, tapered insulation where needed, and overflow scupper or internal drain systems. For Eichler homes with original beam-and-decking ceilings, we work within the existing roof structure to maximize drainage without altering the iconic interior.