Fast, Reliable Spray Foam Insulation Across Boerne
Spray foam insulation in Boerne typically runs $1.80-$3.20 per board foot for open-cell and $3.50-$5.50 for closed-cell, with most whole-home attic jobs falling between $2,800 and $7,500 depending on roof deck square footage and accessibility. Our crews serve Boerne from our San Antonio dispatch office, and we usually book site visits within 48 hours for addresses along I-10, FM 474, and throughout the Kendall County corridor. Call (830) 529-7780 to schedule a free estimate with a written price before any work starts.
We’ve been sealing and insulating homes under The Haven Standard since 2016, and Boerne’s building stock keeps us busy in ways that surprise homeowners who bought new construction expecting efficiency. The master-planned subdivisions off I-10, from Esperanza to the newer phases south of town, were built to minimum Texas energy code with blown fiberglass that settles fast in dry Hill Country air. Our Spray Foam Insulation team treats every job as a thermal envelope repair, not just an insulation upgrade.
Why Topside Attic Insulation Boerne Is Boerne’s Preferred Spray Foam Insulation Company
We’ve sealed and insulated over 9,000 homes since 2016, and a growing share of that work is in Boerne’s newer subdivisions where homeowners are discovering their builder-grade insulation isn’t performing. Our reviews from Boerne customers consistently mention two things: the blower-door numbers we publish showing actual before-and-after air leakage, and the written price they received before anyone lifted a tool. No voicemail loops, no callback windows measured in business days. A live person answers our phones 24/7, and our crews typically reach Boerne properties from our San Antonio office within the same scheduling window we keep for inner-ring suburbs.
What separates our work in Boerne is that we know the local housing stock cold. Slab-on-grade foundations over Edwards Plateau limestone, metal roofs that supercharge attic heat gain, rim joists left wide open by production builders. Wes Okafor built our protocol around documenting everything, because homeowners in Boerne’s 32-50 demographic research thoroughly before calling. They read three-star reviews as carefully as five-star ones, and they want evidence, not enthusiasm.
Our Spray Foam Insulation Services in Boerne
Closed-Cell Spray Foam
Closed-cell spray foam is our primary specification for Boerne roof decks and rim joists, and for good reason. At roughly 1,400 feet elevation on the Edwards Plateau escarpment, Boerne sees larger diurnal temperature swings than San Antonio below. Closed-cell’s R-6.5 per inch and rigid structure handle those swings without the condensation risk that thinner open-cell applications can develop during hard freezes like Winter Storm Uri in February 2021. Most Boerne closed-cell jobs run $3.50-$5.50 per board foot, with typical roof deck applications in a 2,200-square-foot home landing between $3,200 and $5,800.
Open-Cell Spray Foam
Open-cell spray foam works well in Boerne’s above-grade wall cavities and some attic floor applications where moisture management is less extreme and cost is a priority. At R-3.6 per inch, it’s less thermally efficient than closed-cell, but it expands to fill irregular framing common in the Hill Country-style architecture of subdivisions like Esperanza. We specify open-cell at minimum 5.5 inches on Boerne roof decks, never the thin applications that failed during Uri. Typical open-cell jobs in Boerne run $1.80-$3.20 per board foot, with whole-attic floor jobs in production homes ranging $2,800-$4,500.
Rim Joist Spray Foam
Rim joist spray foam is arguably the highest-impact upgrade we do in Boerne, because production builders consistently leave these slab-on-grade perimeter connections unsealed. The Edwards Plateau limestone substrate doesn’t forgive air leaks. Summer heat radiates up through unsealed rim joists. Winter freeze air, especially during Hill Country cold snaps, bypasses floor insulation entirely. We specify closed-cell at 2-3 inches on Boerne rim joists, creating both an air seal and a thermal break. Most Boerne homes need 80-150 linear feet of rim joist treatment, typically running $1,200-$2,400.
Garage Ceiling Spray Foam
Garage ceiling spray foam has become a standard add-on in Boerne after we complete attic work, because the metal roofs common on Hill Country-style homes radiate straight through uninsulated garage ceilings into conditioned space above. We were called to a slab-on-grade home in the Esperanza subdivision off the I-10 corridor where the builder had installed standard blown fiberglass under a standing-seam metal roof; by August the attic was reading over 150°F and the homeowner’s HVAC couldn’t hold 78°F. Our crew applied closed-cell spray foam to the roof deck and rim joists, sealing the thermal envelope that the builder-grade insulation never addressed, and the attic temp dropped dramatically while the system stopped short-cycling. The homeowner also had us foam the garage ceiling while we were there, since the metal roof above it was radiating straight into the house. Garage ceiling jobs in Boerne typically add $1,800-$3,200 to an attic package.
Spray Foam Roof Deck
Spray foam applied directly to the roof deck, rather than the attic floor, is our recommended approach for Boerne homes with ductwork or air handlers in the attic, which describes most production homes built since 2010. By creating a conditioned, semi-conditioned attic space, we move the thermal boundary to the roof line where it belongs, eliminating the 150°F+ attic temperatures that destroy HVAC efficiency and duct sealant. Closed-cell at 4-5 inches or open-cell at 5.5+ inches, depending on budget and moisture risk assessment. Boerne roof deck jobs range widely, $3,500-$7,500 for typical 2,000-2,800 square foot homes.
What happens when you call
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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.
Trusted Brands We Service in Boerne
We source spray foam materials from Owens Corning, Johns Manville, Knauf, and other manufacturers including Icynene and Demilec, with no proprietary product lock-in that limits what we can specify for your specific Boerne home. Our crews stock common closed-cell and open-cell formulations locally for fast turnaround on scheduled jobs, and we select product based on the application, not a distributor relationship. For Boerne’s metal roof/high-heat-load scenarios, we often specify higher-density closed-cell products from Owens Corning or Johns Manville that maintain dimensional stability across the wide temperature swings that come with 1,400-foot elevation. Every product choice is documented in your written scope before work begins.
Common Spray Foam Insulation Problems We See in Boerne Homes
- Builder-grade blown fiberglass settles in Boerne’s dry Hill Country air, leaving the roof deck under-insulated right where metal roofs push attic temps past 150°F in summer. We regularly find R-values 30-40% below stated spec in homes less than five years old.
- Open-cell foam applied too thin on a Boerne roof deck can’t handle the large diurnal swings that come with the ~1,400 ft elevation, leading to condensation and freeze-thaw issues during events like Winter Storm Uri. We specify minimum thicknesses and verify with moisture meters.
- Rim joists on slab-on-grade Edwards Plateau homes are frequently left unsealed by production builders, letting Hill Country freeze air and summer heat bypass the insulation entirely. This is the single most common air leak we find in blower-door tests on newer Boerne homes.
- Garage ceilings with no thermal boundary radiate heat directly into conditioned bedrooms above, especially with the dark metal roofing popular in Hill Country-style architecture. The temperature differential can exceed 40°F on a July afternoon.
Pricing for Spray Foam Insulation in Boerne, TX
| Application | Price per Board Foot | Typical Job Range |
|---|---|---|
| Open-Cell Spray Foam (attic floor) | $1.80 - $3.20 | $2,800 - $4,500 |
| Closed-Cell Spray Foam (roof deck, rim joist) | $3.50 - $5.50 | $3,200 - $5,800 |
| Rim Joist Only (closed-cell) | $3.50 - $5.50 | $1,200 - $2,400 |
| Garage Ceiling Spray Foam | $2.20 - $3.80 | $1,800 - $3,200 |
| Full Roof Deck (closed-cell, typical home) | $3.50 - $5.50 | $3,500 - $7,500 |
What moves a Boerne job toward the higher end: steep roof pitches common in Hill Country-style architecture, limited attic access in homes with finished bonus spaces, and the need for extensive air sealing of top plates and can lights before foam application. What keeps costs down: open attic framing, straightforward access, and combining multiple applications (attic plus garage ceiling, for example) in a single mobilization. Every estimate includes a Written Price Before Any Work Starts under Haven Standard Clause 1, plus a Free Second Opinion if you bring us a competing quote to review together. Call (830) 529-7780 for your written estimate.
We Also Serve Cities Near Boerne
Our crews work throughout the Hill Country corridor, including Boerne and surrounding communities: Bulverde to the south along US-281, Helotes to the southeast, Canyon Lake to the northeast, and San Antonio proper for larger envelope projects. Dispatch and scheduling are coordinated from our San Antonio office, with Boerne jobs routed for efficient coverage of the I-10 and FM 474 corridors.
Serving Boerne, TX - Our Local Coverage Area
We’re based in the Boerne 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 Boerne
Boerne’s master-planned homes were built to minimum Texas energy code with blown fiberglass that settles rapidly in dry Hill Country air, and production builders routinely skip rim joist sealing and adequate roof deck insulation. Call (830) 529-7780 and we’ll review your builder’s insulation spec against what we find in your attic.
Yes, metal roofs supercharge radiant heat gain and push attic temperatures past 150°F, which makes roof deck spray foam, rather than attic floor insulation, the correct thermal boundary placement for most Boerne homes. We specify closed-cell or thick open-cell to handle both the summer heat load and winter freeze exposure that comes with 1,400-foot elevation.
Boerne’s ~1,400-foot elevation on the Edwards Plateau escarpment creates larger diurnal temperature swings and harder freeze exposure than lower San Antonio suburbs, so we specify thicker open-cell minimums and prefer closed-cell for roof decks and rim joists where condensation risk is highest. Winter Storm Uri proved that thin foam applications fail here in ways they don’t at lower elevations.
Yes, garage ceiling spray foam blocks radiant heat transfer from metal roofs into conditioned bedrooms above, and we’ve measured temperature differentials dropping by 15-25°F after application in Boerne homes. Most homeowners add this after seeing attic results, and we price it as a package add-on with written scope.
Watch for HVAC systems that can’t hold setpoint on hot afternoons, uneven temperatures between rooms, and energy bills that climb faster than neighbors in identical floor plans. These are the three symptoms we see most in Boerne’s newer subdivisions where blown fiberglass has settled below spec. Call (830) 529-7780 for a free estimate with blower-door testing and documented photo record.
Written by Wes Okafor, Owner at Topside Attic Insulation Boerne, serving Boerne since 2016 under The Haven Standard.