Spray Foam Insulation Contractor in San Francisco & the Bay Area

Spray polyurethane foam (SPF) is a two-component liquid — a polyol resin and an isocyanate — that is mixed and sprayed on site. It expands within seconds and cures into a rigid or semi-rigid foam that insulates and air-seals in one step, and also acts as a vapor retarder. Open-cell foam is lighter and ideal for interior walls and soundproofing; closed-cell foam is denser, moisture-resistant and adds structural rigidity.

In most Bay Area homes, yes. Spray foam costs more upfront, but it seals the air leaks fiberglass and blown-in cannot, so most homeowners see a 30–50% reduction in heating and cooling costs. It also reduces moisture intrusion and mold risk, adds structural strength (closed-cell) and never sags or settles. Fiberglass and blown-in remain good choices for budget projects or retrofits where full air sealing is not the goal — and we install those too.

A typical single-family attic, wall or crawlspace project takes 1–2 days. Commercial jobs or whole-building encapsulation usually run 3–5 days. Closed-cell foam cures fully in about 24 hours; open-cell is ready for drywall within a few hours. You receive a written project timeline before work begins.

Yes. All occupants, including pets, should be out of the house during application and for at least 24 hours afterward while the foam off-gasses and cures. Once cured, the material is inert and non-toxic. Our crew walks you through preparation and safe re-entry timing.

Absolutely. Spray polyurethane foam roofing is seamless, self-flashing and highly energy-efficient. Finished with a UV-protective silicone or acrylic top coat, it lasts 20+ years with periodic recoating. It is one of the most popular systems in the Bay Area for commercial buildings, warehouses, flat-roof apartment complexes and older homes with built-up tar roofs.

Yes — as a standalone service or as part of a re-insulation package. We vacuum out old fiberglass batts, deteriorated blown-in and damaged spray foam, bag and dispose of it (including rodent-contaminated material), then inspect the substrate and address any moisture or mold issues before new insulation goes in.

We are headquartered in San Francisco and serve every city within 100 miles: San Francisco, Oakland, Berkeley, San Jose, Santa Clara, Sunnyvale, the Peninsula, Marin, Sonoma and Napa counties, Contra Costa and Alameda counties, plus Sacramento, Stockton, Santa Cruz and Monterey for commercial projects. We also run a Southern California crew in Los Angeles. Call or submit the quote form to confirm coverage.