Spray Foam Insulation in San Antonio, TX
Spray foam insulation for attics, rim joists, crawl spaces, or chimney chases. Closed-cell for vapor barrier + structural, open-cell for sound + interior walls. Serving San Antonio (110 ZIP codes, 1470k residents) and surrounding neighborhoods with same-week scheduling.
Spray Foam Insulation in San Antonio
Spray foam insulation applies open- or closed-cell foam that insulates and air-seals in one step — excellent for rim joists, attics, and hard-to-seal cavities. Closed-cell adds an air and vapor barrier with high R-value per inch.
Why this matters in San Antonio
San Antonio spans some of the oldest masonry in Texas — King William, Monte Vista, Alamo Heights — to vast new-build like Alamo Ranch and Stone Oak. Historic clay-liner cracking and masonry repointing dominate the older stock, while prefab cap-and-chase work leads in the suburbs. That local stock is exactly why our San Antonio crews tailor spray foam insulation to the homes here — not a generic checklist.
Common signs in San Antonio homes
- Drafty rim joists or cathedral ceilings
- Air leaks insulation alone won't fix
- Want a combined air + vapor barrier
- High bills despite existing insulation
Spray Foam Insulation in San Antonio (Bexar County) — what's local
San Antonio sits in Bexar County (county seat: San Antonio). San Antonio's home county — some of the oldest masonry in Texas; clay-liner cracking and repointing dominate alongside suburban prefab work. For spray foam insulation that means our San Antonio crew sizes up the local housing stock before quoting — and follows Bexar County permit requirements for any work that needs an inspection sign-off.
Every spray foam insulation in San Antonio
Deliverables
- Full sweep + inspection
- Soot containment + HEPA vacuum
- Level 1 visual inspection report
- Photos of any code issues
- Recommendations + written quote
- Drop cloths + clean cleanup
How a job runs
Assess
Identify cavities and the right foam type.
Mask
Protect surrounding surfaces fully.
Spray
Apply foam to specified thickness/R-value.
Inspect
Confirm coverage, trim, and clean up.
8+ neighborhoods in San Antonio
Same-week service across every neighborhood in San Antonio. Don't see yours? Call (682) 226-6257 — if it's in San Antonio, we cover it.
The San Antonio advantage.
Our San Antonio crew lives in the metro they serve, across Bexar County. They know which San Antonio neighborhoods — Alamo Heights line, Stone Oak, Monte Vista and more — have crumbling crowns, and which newer builds skipped the cap. Local code knowledge, local referrals, local accountability for every spray foam insulation.
4.9 Stars Across 0 Reviews
Every review is publicly verifiable on Google. We don't compose them — and we don't hide negative feedback, we fix it.
"Showed up on time, gave a clear inspection report with photos, and fixed our cap same-day. No upsell pressure."
Sara L.Plano, TX · Chimney Cap Installation"Best chimney service in the area. Written quote before work, no surprises, professional from start to finish."
Robert G.Frisco, TX · Crown Repair"Honest, professional, and reasonably priced. Highly recommended for anyone needing chimney work."
David R.Dallas, TX · Chimney Sweep"Replaced our cracked crown — they explained everything, sent insurance docs, and it's held up through 3 winters now."
Jessica M.McKinney, TX · Chimney Crown"Did the relining job on a 1970s house. Code-compliant, NFI specialist signed off. Worth every penny."
Michael T.Irving, TX · Chimney LinerMore services in San Antonio
Spray Foam Insulation in nearby Bexar cities
We cover spray foam insulation across Bexar County — same crew, same warranty. Nearby San Antonio cities we also serve:
Spray Foam Insulation in San Antonio — FAQ
Open-cell vs. closed-cell spray foam, what's the difference?
Closed-cell is dense, about R-6 to R-7 per inch, adds rigidity, and acts as a moisture and air barrier, which suits tight cavities, rim joists, and damp areas. Open-cell is lighter, about R-3.5 to R-3.9 per inch, expands more to fill gaps, dampens sound, and costs less, but it's vapor-permeable and not a moisture barrier.
Why does spray foam cost more than blown-in?
It's a two-part chemical system needing specialized rigs, trained applicators, and protective gear, and it air-seals as it insulates rather than just adding R-value. The higher upfront price often buys better air-sealing and more R-value per inch, which matters most in tight spaces where blown-in can't go.
Do I have to leave the house during spray foam installation?
Yes. Occupants and pets should stay out during spraying and for the manufacturer's re-occupancy window, commonly around 24 hours, while the foam cures and off-gasses. Proper ventilation during and after is required; your installer confirms the exact re-entry time for the specific product.
Is spray foam an air and vapor barrier?
Closed-cell is both an air barrier and, at sufficient thickness, a vapor retarder. Open-cell air-seals but stays vapor-permeable. Picking the wrong type for your climate, for example a vapor-closed assembly that can't dry, can trap moisture in the structure, so the choice should match your wall or roof assembly.
What drives spray foam pricing?
Foam type (closed-cell costs noticeably more than open-cell), the thickness and R-value targeted, square footage, and prep or removal of existing material. Spraying an open attic roofline is very different work from filling wall cavities, so the quote should specify type, thickness, and area.
Do you serve all of San Antonio?
Yes — our crews cover San Antonio's 110 ZIP codes across Bexar County, including Alamo Heights line, Stone Oak, Monte Vista, plus the surrounding communities.
How soon can you schedule spray foam insulation in San Antonio?
We offer same-week scheduling across San Antonio, booked by a real person in under two minutes, 7 AM to midnight every day.
Why do San Antonio homes need spray foam insulation?
San Antonio spans some of the oldest masonry in Texas — King William, Monte Vista, Alamo Heights — to vast new-build like Alamo Ranch and Stone Oak. Historic clay-liner cracking and masonry repointing dominate the older stock, while prefab cap-and-chase work leads in the suburbs. Spray Foam Insulation is part of keeping that local housing stock safe, efficient, and up to code.
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Free written quote. Same-week scheduling. 24/7 emergency response when you need it.
24/7 Response
Active leak, animal in flue, post-fire damage, or smoke event? Real humans on the line 7 AM to 12 AM every day — replies in under 2 minutes. Tech dispatch within 2 hours during business hours, subject to crew availability after-hours.
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