Insulation Company in San Antonio, TX
San Antonio’s heat doesn’t just make summers uncomfortable. It exposes how little insulation sits between your family and a 105-degree afternoon. Our crews work across the city, from 1920s bungalows in Monte Vista to 2000s builder-grade homes in Alamo Park West, and we see the same pattern: attics with thin, compressed fiberglass that stopped doing its job years ago. The result is upstairs bedrooms that never cool down, stairwells that feel like a wall of heat, and AC systems running around the clock. We solve that with attic insulation and spray foam matched to the house, not a one-size-fits-all product. Call (903) 437-9164 and we’ll talk through what your attic actually needs.
Why San Antonio Homes Are Different
San Antonio’s housing stock grew in waves, and each wave left its own insulation problem. The city’s explosive production-built boom from the 1980s through 2000s put up thousands of homes with minimal original insulation and poorly sealed attics, and thirty-plus years of South Texas sun has compressed what little was there. In neighborhoods like Churchill Estates and Oak Hills, we frequently find 1970s-era homes with only R-11 fiberglass batts in the attic, brittle and flattened by decades of heat. Owners notice it most in upstairs bedrooms that run 10 to 15 degrees hotter than the ground floor until the attic gets addressed. Older wood-frame bungalows in King William are a different challenge entirely: some were built with no insulation at all, and plaster ceilings mean careful work around original trim.
The climate does not make the job easier. San Antonio’s humid summers drive high cooling loads, so radiant barrier and proper attic ventilation matter just as much as the insulation itself. And the humidity in wall cavities means our crews watch vapor barrier placement closely, because a wrong move here leads to mold. When winter dips below freezing at least once most years, it shocks under-insulated pipes and makes those drafty rooms impossible to ignore. All of this means the highest-ROI upgrade for most San Antonio homeowners is not a new AC unit. It’s getting the attic insulated and the air leaks sealed first.
Our Main San Antonio Services
Most San Antonio homeowners call us for one of two jobs, and each has its own dedicated page where we explain the process, the products, and what it costs in this market.
Attic Insulation in San Antonio
Attic insulation in San Antonio is the workhorse fix for those hot upstairs rooms. We’re pulling out decades-old batts, air sealing the attic floor around top plates and light fixtures, and then laying new insulation at a depth that actually works for this climate. The job is straightforward in most San Antonio attics, but hot attics in July and August mean our crews start early and work efficiently. We also check the attic ventilation before we finish, because insulation without airflow in a humid climate creates new problems. Read more about how we approach it on our Attic Insulation in San Antonio page.
Spray Foam Insulation in San Antonio
Spray foam earns its keep in San Antonio’s tighter spaces: unvented attics, knee walls, cantilevered floors under second-story bump-outs, and the rim joists that leak air into slab-on-grade ranch homes built from the 1960s through the 1990s. Foam seals and insulates in one step, which handles the air leakage that fiberglass alone cannot. It also adds structural rigidity, which matters in a city with expansive clay soils that shift foundations enough to open small gaps in framing. Our crews use products from brands like Demilec and Icynene, matched to the specific cavity. Learn what’s involved on our Spray Foam Insulation in San Antonio page.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Brands We Service in San Antonio
We install products from Owens Corning, CertainTeed, Demilec, and GreenFiber here in San Antonio, choosing the product that fits the house and the family. GreenFiber, for instance, gives San Antonio homeowners a pet-safe blown-in option made primarily from recycled paper. We stock common materials locally, so most jobs get scheduled without waiting on freight. See the full our brands list for what we work with.
Pricing for Insulation Company in San Antonio, TX
Prices below reflect what we typically quote across San Antonio’s housing stock. Exact numbers depend on square footage, access, and the product you choose, and you get a written price before any work begins.
| Service | Typical range in San Antonio |
|---|---|
| Attic insulation – small attic (under 800 sq ft) | $1,600 – $3,200 |
| Attic insulation – medium attic (800 – 1,500 sq ft) | $3,200 – $5,400 |
| Attic insulation – large attic (1,500+ sq ft) | $5,400 – $8,500 |
| Spray foam – small attic (under 800 sq ft) | $4,000 – $7,000 |
| Spray foam – medium attic (800 – 1,500 sq ft) | $7,000 – $11,000 |
| Spray foam – large attic (1,500+ sq ft) | $11,000 – $16,000 |
| Air sealing package (with insulation) | $600 – $1,800 |
| Radiant barrier (installed in attic) | $900 – $2,100 |
Two things push prices up most often in San Antonio: attic access that’s tight or awkward, and older homes where the existing insulation is degraded enough to need full removal before anything new goes in. Every quote here is written down before we start. No verbal ranges, no surprise line items.
Neighborhoods We Serve in San Antonio
We work across San Antonio every week. Our crews run from the historic districts inside Loop 410 up through the northern suburb-style neighborhoods around UTSA and beyond. Most of San Antonio can be reached quickly, and we schedule so your crew arrives prepared with the right material for your specific attic.
- Monte Vista and King William – older bungalows needing careful treatment
- Oak Hills and Churchill Estates – 1970s homes with compressed R-11 batts
- Alamo Heights and Terrell Hills – mid-century construction and unique attics
- Stone Oak and Encino Park – newer builds with under-sealed attics
- Northwest side – Alamo Ranch and still-growing 2000s subdivisions
Service Area – Cities Near San Antonio
Beyond San Antonio proper, our crews serve the surrounding communities where homeowners face the same heat and the same under-insulated attics. That includes Cibolo, TX, Floresville, TX, Boerne, TX, and New Braunfels, TX. If you’re not certain whether your address falls in our service area, call us and ask. A live person answers, every time.
Serving San Antonio, TX - Our Local Coverage Area
We’re based in the San Antonio area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Insulation Company in San Antonio
Most San Antonio homes can be on our schedule within a week or two, and we can often route emergency work like a damaged roof leak that soaked the insulation sooner. Call (903) 437-9164 and the person who answers can check the calendar and tell you the next opening while you’re on the phone.
Most San Antonio HOAs do not require approval for attic insulation or air sealing work since it’s not visible from the street. If you’re in a historic district like King William, the city’s design rules might affect exterior vents or roof work, so we’ll flag that before we start. Call us and we’ll help you sort out what applies to your home.
Yes. We schedule the work at a time that works for your household, and our crews work quietly when kids are napping. If you have pets, we choose pet-safe products where a choice exists, like GreenFiber blown-in insulation, so the dog can be home while we work.
What happens when you call
- 1A real person answersNo phone trees - talk to a local insulation pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3A background-checked tech heads outLicensed & insured, typically within 30-60 min.
- 4You approve before work beginsNothing starts until you say go.
What San Antonio Customers Say
"Attic insulation with a newborn in the house. The crew was quiet, laid protection on every floor they crossed, and hauled off all the old material. Left it spotless and the house is cozier already."
- Corinne Dyer"Removed the old flattened insulation and blew in new. They were so careful not to track anything through the house, booties on, drop cloths down. Cleaned up spotless after."
- Kelvin Osei"Careful and clean from start to finish. They covered the hallway, wore booties, and hauled off all the old material without leaving a speck. Respectful of the home the whole time."
- Brett Yamamoto