Fast, Reliable Spray Foam Insulation Across Windcrest
Spray foam insulation in Windcrest typically costs $2.80 to $5.40 per board foot for closed-cell and $1.20 to $2.20 for open-cell, with most complete attic jobs running $3,800 to $7,500 depending on square footage and whether we’re treating the roof deck or the floor. We’re at Windcrest homes within 45 minutes of dispatch from our San Antonio scheduling office, and our crews know the city’s streets well enough to navigate without GPS: Windcrest Drive, Midcrown Drive, the neighborhoods threading off Eckhert Road. If your brick ranch was built between the 1950s and 1970s, we’ve almost certainly already treated a house on your block. Call (830) 420-0953 for a written price before any work starts.
Why Topside Attic Insulation Converse Is Windcrest’s Preferred Spray Foam Insulation Company
We’ve sealed and insulated more than 9,000 homes since 2016, and a disproportionate share of them sit in this small, fully built-out enclave surrounded by San Antonio on all sides. Windcrest’s housing stock is almost comically uniform: single-story brick-veneer ranch homes, most with original blown fiberglass that has settled to an effective R-7 or lower, baking under attic temperatures that spike past 150°F from May through October. That repetition is an advantage. We don’t waste a morning diagnosing surprises; we walk in knowing what we’ll find.
Our reviews from Windcrest customers consistently mention two things: the before-and-after blower-door numbers we publish on every applicable job, and the fact that we finished in a single day. One recent customer on Timberhill Drive noted that her crew “arrived with the scope already written, knew where the plumbing stacks were without being told, and left the same afternoon.” Another on Crestway Street wrote that the documented photo record we delivered showed exactly what had been sealed and where the foam went.
Response time to Windcrest averages under 45 minutes from dispatch. Our San Antonio office coordinates scheduling and dispatches crews who live in the metro and know Windcrest’s layout. No callback windows measured in business days. A live person answers calls 24/7.
Our Spray Foam Insulation Services in Windcrest
Closed-Cell Spray Foam
Closed-cell spray foam is our primary recommendation for Windcrest’s brick ranch attics. At roughly 2.0 pounds per cubic foot, it delivers R-6.5 per inch, acts as its own vapor barrier, and adds structural rigidity to roof decks that have flexed through sixty summers of thermal cycling. On a typical Windcrest one-story ranch, we’re spraying 3 to 5 inches to the roof deck or rafter bays, achieving R-19 to R-32 where there was previously R-7 settled fiberglass or less. The material we use is sourced from Owens Corning and Demilec; no proprietary lock-in, so we specify what’s appropriate for the assembly rather than what a manufacturer contract requires.
Open-Cell Spray Foam
Open-cell foam runs lighter, about 0.5 pounds per cubic foot, with an R-value of roughly R-3.6 per inch. It’s permeable to moisture vapor, which makes it appropriate for certain wall cavities and sound-dampening applications but rarely our first choice for Windcrest attics given the 100°F-plus summer highs and the humidity that pushes through from the Gulf. We do use it in garage ceiling applications where the roof deck above is unconditioned and the goal is primarily noise reduction from the garage space below. Our Spray Foam Insulation team will specify which product belongs where, and we’ll put that specification in writing before anyone starts.
Rim Joist Spray Foam
The rim joist is where your foundation meets your first floor, and in Windcrest’s 1950s-1970s ranches, it’s almost always unsealed and uninsulated. During summer, hot humid air migrates through that band and condenses against the cooler subfloor; in winter, it’s the coldest surface in the house. We spray closed-cell foam directly to the rim joist, typically 2 to 3 inches, which seals air leaks and insulates in one pass. On homes near Windcrest Drive and the older sections off Midcrown, we’ve found this single treatment eliminates the cold-floor complaints that homeowners had assumed were normal for a slab-on-grade house.
Spray Foam Roof Deck
Spray foam applied to the underside of the roof deck converts your attic from a vented, unconditioned space into a semi-conditioned envelope. In Windcrest, this matters enormously. Brick veneer absorbs daytime heat and radiates it into the attic well past sunset; with the roof deck foamed and the attic air-sealed, that heat never reaches the living space below. We typically see attic temperatures drop from 150°F to within 10 to 15 degrees of the conditioned space below. On plaster-and-lath ceilings, which are common throughout Windcrest, this approach avoids adding weight to the ceiling assembly and eliminates the need to disturb potentially fragile lath.
Garage Ceiling Spray Foam
Windcrest garages, like the homes they’re attached to, were built with no consideration for thermal boundary. We spray open-cell or closed-cell foam to garage ceilings depending on whether there’s living space above, and we always air-seal the common wall first. The result is a garage that doesn’t hit 120°F in August and bedrooms above that finally hold temperature.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Before
AfterTrusted Brands We Service in Windcrest
We source materials from Owens Corning, Johns Manville, Knauf, and other manufacturers including Icynene and Demilec. For Windcrest jobs, we stock closed-cell and open-cell formulations appropriate for Climate Zone 2’s hot-humid summers and mild winters. No proprietary product lock-in means we specify by assembly need rather than by distributor incentive. Most Windcrest jobs pull from our San Antonio warehouse inventory, so material delays are rare even when a job books on short notice.
Common Spray Foam Insulation Problems We See in Windcrest Homes
- Settled blown fiberglass at R-7 or lower. The original 1960s-70s insulation in nearly every Windcrest attic has compacted to a fraction of its labeled R-value. We measure it with a probe during our initial assessment; homeowners are usually surprised by how thin the effective layer has become.
- Unsealed penetrations in plaster-and-lath ceilings. Plumbing stacks, electrical chases, and top plates leak conditioned air directly into the attic. Spray foam alone won’t fix this; we air-seal every penetration with targeted foam and gasket before the main spray begins.
- Brick veneer thermal mass pushing heat into attics after dark. Windcrest’s brick construction stores solar gain and releases it into attic spaces late into the evening, forcing cooling systems to run overtime. A sealed and foamed roof deck interrupts that heat path.
- Humidity migration through rim joists and crawl spaces. Windcrest’s position in the hot-humid/hot-dry transitional zone means summer humidity swings are severe. Unsealed rim joists become condensation surfaces; closed-cell foam eliminates both the air leak and the cold surface.
Pricing for Spray Foam Insulation in Windcrest, TX
| Service | Typical Range in Windcrest |
|---|---|
| Open-cell spray foam (per board foot) | $1.20 - $2.20 |
| Closed-cell spray foam (per board foot) | $2.80 - $5.40 |
| Typical attic roof deck, 1,200 sq ft ranch | $4,200 - $6,800 |
| Rim joist treatment only | $1,800 - $3,200 |
| Garage ceiling, 2-car | $2,400 - $4,000 |
What moves a Windcrest job within these ranges: square footage of surface to be foamed, whether we’re treating roof deck or attic floor, the condition and accessibility of the existing insulation, and whether we’re also performing air sealing of top plates and penetrations. Every job begins with a written price - flat, with scope and warranty documented before anyone lifts a tool. That’s Haven Standard Clause 1. We also offer a Free Second Opinion on any written estimate from another contractor; bring us their scope and we’ll read it with you. Call (830) 420-0953 to schedule.
We Also Serve Cities Near Windcrest
Our crews work throughout the San Antonio metro, including Windcrest and neighboring Converse, Universal City, Live Oak, and Schertz. Dispatch and scheduling are coordinated from our San Antonio office, with local crews serving each area. If you’re unsure whether your address falls within our standard Windcrest service radius, call and we’ll confirm.
Serving Windcrest, TX - Our Local Coverage Area
We’re based in the Windcrest 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 - Spray Foam Insulation in Windcrest
Adding more blown fiberglass on top of settled R-7 material doesn’t solve the air leaks, and in Windcrest’s 150°F attics, new fiberglass will settle and degrade on the same accelerated timeline. Spray foam, particularly closed-cell applied to the roof deck, creates an air-impermeable thermal boundary that doesn’t settle and doesn’t allow the attic heat to radiate through. On a brick ranch near Windcrest Drive, we opened the attic hatch and found the original 1960s blown fiberglass flat on plaster-and-lath, no sealing around the plumbing stack, and the homeowner’s August electric bill topping $300. We air-sealed the penetrations, then sprayed closed-cell foam to the roof deck, and her next August bill dropped by about a third while the back bedrooms finally held temperature. Because it was a one-story brick ranch with no surprise framing, we finished in a single day-no return trip needed. Call (830) 420-0953 for a written price on your specific home.
Yes, and it’s often the best approach for exactly that reason. Plaster-and-lath ceilings are brittle and labor-intensive to disturb; spraying the roof deck above avoids adding weight or vibration to the ceiling assembly entirely. The foam creates the thermal boundary at the roofline instead of the floorline, which also keeps your ductwork - typically located in the attic - inside the conditioned envelope. We document the entire application with photos and provide before-and-after blower-door readings so you can verify the air-sealing result.
Most complete jobs finish in a single day, typically six to eight hours on site. Windcrest’s uniform housing stock means we rarely encounter framing surprises or access issues that would require a return trip. The crew arrives with the written scope, performs air sealing first, then sprays. You receive the Documented Photo Record and, on applicable jobs, the blower-door numbers before we leave. Call (830) 420-0953 to book a specific date.
It affects where we use open-cell versus closed-cell. Closed-cell’s vapor impermeability and higher R-value per inch make it our default for roof decks and rim joists in Windcrest’s climate. Open-cell stays in the specification for garage ceilings and some wall cavities where moisture management differs. We don’t guess; the product selection is written into your scope before work starts, with the rationale noted. Under Haven Standard: Have it in writing.
Almost certainly similar, though we’ll verify with our own assessment. Windcrest’s narrow build-out window means the failure pattern repeats block after block: original blown fiberglass settled to R-7 or lower, unsealed penetrations, plaster-and-lath ceilings, brick veneer thermal mass. That predictability is an advantage for you. We can scope accurately from a brief attic inspection, write a flat price with confidence, and execute without the contingencies that drive up costs on homes with mixed construction eras. Call (830) 420-0953 and we’ll schedule a look.
Ready to stop losing conditioned air into a 150°F attic? Call (830) 420-0953 for a free estimate. We’ll provide a written price before any work starts, a 365-Day Done Right Promise, and a Documented Photo Record when the crew leaves. On applicable jobs, you’ll also receive before-and-after blower-door numbers so you can see exactly what changed.
Written by Wes Okafor, Owner at Envelope Insulation Co., serving Windcrest and the San Antonio metro since 2016.