Residential & Commercial Spray Foam Insulation Services
Spray polyurethane foam (SPF) is a two-component liquid that expands up to 100 times its volume within seconds of leaving the gun, flowing into every crack, gap and void that batts and blown-in leave exposed. The result is a continuous thermal and air barrier that stops the drafts, condensation and energy waste that plague Bay Area homes built before modern energy codes.
USA Spray Me installs spray foam in single-family homes, condos, apartment buildings, offices, warehouses, wineries, labs, metal buildings and shipping containers throughout San Francisco, the Peninsula, East Bay, South Bay and North Bay. Every job is sized to the prescriptive requirements of California Title 24, Part 6 for your climate zone, and we coordinate HERS verification when Quality Insulation Installation (QII) credit is part of your permit.
Open-Cell vs. Closed-Cell: Which Spray Foam Do You Need?
Both foams air-seal, but they solve different problems. Our estimator will recommend one — or a hybrid — based on the assembly, moisture exposure and budget.
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| Open-cell spray foam | Closed-cell spray foam | |
|---|---|---|
| R-value per inch | R-3.6 – R-3.8 | R-6.0 – R-7.0 |
| Density | ~0.5 lb/ft³ — soft, spongy | ~2.0 lb/ft³ — rigid |
| Vapor barrier | No (vapor-permeable) | Yes (Class II at 1.5"+) |
| Sound dampening | Excellent | Good |
| Adds structural strength | No | Yes — up to 2–3× racking strength |
| Best for | Attic roof decks, interior walls, ceilings, soundproofing | Crawl spaces, rim joists, exterior walls, metal buildings, below-grade, coastal moisture |
| Typical installed cost | $1.00 – $1.50 per board foot | $1.50 – $2.50 per board foot |
Where We Install Spray Foam
Spray foam goes wherever energy loss and air leakage are the biggest problem:
- Attics — applied to the underside of the roof deck to create a sealed, semi-conditioned attic that protects HVAC equipment and ducts, or to the attic floor for a conventional vented attic.
- Existing walls — slow-rise injection foam fills closed cavities in Victorians, Edwardians and post-war homes without demolition.
- Crawl spaces — closed-cell foam on the subfloor or foundation walls stops the cold, damp floors common in fog-belt neighborhoods.
- Rim and band joists — the single leakiest spot in most Bay Area homes.
- Garages, ADUs and additions — fast, code-compliant insulation for new construction.
- Commercial buildings — warehouses, cold storage, commercial kitchens, labs, metal buildings and shipping containers.
Why Bay Area Property Owners Choose Spray Foam
California energy prices are among the highest in the country, so air sealing pays back fast. Most homeowners see a 30–50% drop in heating and cooling costs after a whole-house spray foam retrofit, and because the foam never sags, settles or absorbs water, performance stays constant for the life of the building.
- Keeps indoor temperatures stable year-round in micro-climates that swing from 50°F fog to 95°F heat
- Limits the air leaks that cause dampness, condensation and mold in coastal homes
- Improves acoustic comfort by cutting airborne sound transfer
- Lets HVAC run less and last longer — and often allows smaller equipment on new builds
- Qualifies for Title 24 performance-path credit and many utility rebates
What to Expect on Installation Day
A typical attic, wall or crawl-space project takes 1–2 days; whole-building commercial encapsulation 3–5 days. We mask and protect finished surfaces, set up ventilation, spray in controlled lifts to the specified thickness, then trim and inspect. Occupants and pets stay out during application and for 24 hours afterward while the foam cures and off-gasses. Closed-cell cures fully in about 24 hours; open-cell is ready for drywall in a few hours. You get a written timeline before we start and a workmanship warranty when we finish.
Free on-site inspection and written quote for spray foam insulation anywhere within 100 miles of San Francisco.
Recent Spray Foam Insulation Projects
Where We Offer Spray Foam Insulation
USA Spray Me provides spray foam insulation throughout San Francisco, the Peninsula, South Bay, East Bay, North Bay and the Central Valley — every community within 100 miles of our Treasure Island headquarters, including:
