Fiberglass Insulation Services for Homes and Businesses
Fiberglass remains the most widely installed insulation in California for good reason: it is affordable, non-combustible, formaldehyde-free, available in every form factor and — when installed correctly to Quality Insulation Installation (QII) standards — delivers dependable R-11 to R-38 performance for decades. USA Spray Me installs fiberglass batts, blown-in fiberglass, rigid board, metal-building blankets, sound-control batts and duct insulation in homes, remodels, office build-outs, studios, warehouses and metal buildings across San Francisco and the Bay Area.
Fiberglass is also our go-to partner in hybrid systems: a flash coat of closed-cell foam for air sealing, finished with fiberglass batts to reach the target R-value at a lower total cost.
Types of Fiberglass Insulation We Install
- Batts and rolls — pre-cut for 16" and 24" framing, R-11 to R-38, kraft-faced or unfaced, for walls, floors and ceilings.
- Blown-in (loose-fill) fiberglass — R-2.2 to R-2.7 per inch, ideal for topping up attics and filling irregular cavities.
- Rigid fiberglass board — ducts, mechanical rooms and continuous insulation applications.
- Blanket insulation — vinyl-faced rolls for metal buildings, barns and warehouses.
- Sound-control batts — acoustic fiberglass for interior walls, home theaters, studios and multi-family party walls.
- Duct insulation — wraps and liners that stop energy loss and condensation on HVAC ducts in attics and crawl spaces.
Fiberglass vs. Spray Foam vs. Blown-In
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| Fiberglass batts | Blown-in fiberglass / cellulose | Spray foam | |
|---|---|---|---|
| R-value per inch | R-3.1 – R-4.3 | R-2.2 – R-3.8 | R-3.6 – R-7.0 |
| Air sealing | No — needs separate air barrier | Partial | Yes |
| Installed cost (attic) | $0.50 – $1.40 / sq ft | $1.20 – $2.50 / sq ft | $1.50 – $6.50 / sq ft |
| Fire performance | Non-combustible | Treated (cellulose) / non-combustible (fiberglass) | Requires ignition barrier |
| Best for | Open framing, budget projects, sound walls | Attic top-ups, closed cavities | Air sealing, moisture, max R in tight spaces |
| Lifespan | Up to 100 years | 20–30 years (cellulose settles) | Life of building |
Installed Right: Why QII Matters
Fiberglass only performs at its rated R-value when it fills the cavity completely with no gaps, voids or compression, and when it is paired with an air barrier. California's Title 24 awards compliance credit for Quality Insulation Installation verified by a HERS rater, and our crews install to that standard on every job: cut to fit around wiring and boxes, split around pipes, friction-fit without compression, and sealed at top plates and penetrations.
When We Recommend Fiberglass
Fiberglass is the right call when the cavity is open and accessible, when budget is the priority, when a fire-rated assembly is required, or as the fill layer over a closed-cell flash coat. Where moisture, air leakage or limited depth are the main issue, we will tell you honestly that spray foam will serve you better — we install both and have no incentive to upsell.
Free on-site inspection and written quote for fiberglass insulation anywhere within 100 miles of San Francisco.
Recent Fiberglass Insulation Projects
Where We Offer Fiberglass Insulation
USA Spray Me provides fiberglass 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:
