Spray Foam Insulation in Kirby - Same-Day Service, Done Right the First Time

Fast, Reliable Spray Foam Insulation Across Kirby

Spray foam insulation in Kirby typically runs $1,800 to $6,200 depending on whether you’re sealing an attic floor, a roofline, a rim joist band, or a garage ceiling. Most Kirby jobs are completed in a single day once the foam has time to cure. We dispatch crews from our San Antonio office into Kirby every week, and we know this city’s housing stock well enough to spot problems before the first can of foam gets opened. Call (254) 279-0971 for a written quote before any work begins.

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Here’s the thing about Kirby: it’s not one housing market, it’s two. The east side is full of 1950s through 1970s ranch homes with low-pitch roofs and minimal eave overhangs. The west and south sides are packed with 2000s and 2010s tract builds that look fine on the surface but often skipped real air sealing. Both need spray foam for different reasons, and those reasons change how we apply it.

Key takeaways for Kirby homeowners:

• Closed cell foam on your attic floor is the single biggest cooling-cost cut you can make in a Kirby summer.
• Open cell foam belongs on the roofline in most ranch homes, but only with proper vapor management for our humidity.
• Older east-side ranch attics frequently hide compressed R-5 batts under plywood decking, and spraying over them creates mold risk.
• We give you a written price before work starts, plus a 365-day Done Right Promise in writing on every job.

Why Laurel Attic Insulation San Antonio Is Kirby’s Preferred Spray Foam Insulation Company

Laurel Attic Insulation operates as part of the Relay Home Co. family, founded in 2003. We built this business around a simple idea: insulation should be priced in writing, installed by someone who shows up on time, and backed by a real guarantee. That’s the Relay Visibility Guarantee, and it applies to every Kirby job we run. You get a live arrival time for your technician, before-and-after photos of the work, and a written price delivered before a single staple or foam bead is set.

Our crews answer to Chase Whitaker, who leads Laurel Attic Insulation across the Kirby and greater San Antonio area. Chase’s standard is blunt: if a Kirby homeowner can’t see exactly what got sprayed, where it got sprayed, and what it cost, the job isn’t done. That’s why we photograph every top plate, every can light penetration, and every rim joist cavity before we close up.

We’ve worked in Kirby long enough to recognize the streets. Ackerman Road, FM 78, Binz-Engleman Road, the subdivisions west of Ackerman Middle School. Our technicians know that an east-side ranch off Binz-Engleman may have original 1963 framing that shifts in August heat, and that a 2005 tract home near Old Seguin Road probably has unsealed top plates leaking conditioned air into the attic all summer. Local knowledge like that is the difference between a foam job that works and one that just looks done.

Every Kirby job includes the 365-Day Done Right Promise. If it’s not right, we make it right. In writing. And if a repair fails, you get a free second visit. No charge, no argument. Calls are answered by a live person 24/7, which matters when your attic hits 140°F on a Saturday afternoon in July and you want answers.

Closed Cell Spray Foam Insulation in Kirby

Closed Cell Spray Foam Insulation in Kirby is the workhorse for ranch homes and tract houses that fight this city’s humidity. Closed cell foam cures to a rigid, dense layer that stops both air and moisture, and it adds structural strength to the roof deck. In Kirby, where summer dew points sit in the 70s and shoulder-season humidity lingers for weeks, that moisture-blocking ability is not optional.

Most closed cell attic floor jobs in Kirby run $2,800 to $5,400 for a typical 1,400 to 1,800 square foot ranch. Roofline applications go higher because you’re covering more surface area and need at least 3 inches of foam, but they eliminate the attic as a thermal problem entirely. Garage ceiling jobs are the smallest scope, usually $900 to $1,800.

Attic Floor Sealing for East-Side Ranches

Kirby’s mid-century ranches have a specific failure pattern. The original R-11 fiberglass batts compress over decades, especially under plywood storage decks. Thermal cameras show ceiling temperatures crossing 94°F by mid-afternoon. We remove the decking, vacuum the old material, and apply closed cell foam directly to the attic floor, sealing every top plate and penetration as we go.

Roofline Applications for Low-Pitch Roofs

Low-pitch roofs in Kirby leave very little attic headroom, which makes attic floor insulation a miserable retrofitt. Closed cell foam on the roofline turns the attic into conditioned space and stops heat from ever entering. This approach works especially well when the home’s HVAC equipment sits in the attic, which describes most 2000s-era Kirby tract houses.

Open Cell Spray Foam in Kirby

Open Cell Spray Foam in Kirby is the right call when you need serious sound control and air sealing but don’t need the vapor-barrier properties of closed cell. Open cell foam expands aggressively and fills every crack in a rim joist band or garage ceiling cavity, which makes it excellent for stopping air movement. But in Kirby’s humidity, it has to be placed correctly or it creates problems.

Open cell spray foam on a Kirby attic floor typically runs $1,800 to $3,600. Rim joist work in a crawlspace or basement-adjacent foundation runs $500 to $1,400 depending on linear footage. Garage ceiling applications fall between $1,200 and $2,200 for a standard two-car garage.

Rim Joist and Crawlspace Work

Kirby’s east-side ranches sit on pier-and-beam foundations or shallow crawlspaces that wick humidity straight into the floor system. Open cell foam injected into the rim joist cavities stops that air movement cold. The foam is vapor-permeable, so any moisture that does get in can dry toward the interior, which prevents the trapped-water problems you get with closed cell in the wrong location.

Garage Ceiling and Bonus Room Floors

Kirby tract homes often have bonus rooms above garages that are impossible to keep comfortable. Open cell foam on the garage ceiling stops heat from cooking the bonus room floor and quiets garage noise at the same time. It’s a two-for-one upgrade that pays off every August afternoon when the garage door opens and blasts hot air into the space below a bedroom.

Trusted Brands We Service in Kirby

We stock and install open cell and closed cell foam from Icynene, Demilec, and CertainTeed. These are not the brands you find on a shelf at a big box store. Icynene’s open cell formulation expands consistently in Kirby’s heat without leaving soft spots. Demilec’s closed cell foam cures rigid enough to walk on within hours, which matters when we’re sealing an attic floor and the homeowner wants to put the storage deck back. CertainTeed’s building science team produces data on vapor drive that informs how we place foam in high-humidity attics like the ones we see on Kirby’s east side. We carry Demilec and Icynene products specifically for Kirby’s older ranch applications because they perform better in low-pitch roofline work than cheaper alternatives.

Common Spray Foam Insulation Problems We See in Kirby Homes

• Open cell foam against the roof deck without a vapor retarder. Low-pitch ranch roofs in Kirby have minimal eave overhangs, which means rain and humid air hit the sheathing directly. Open cell foam wicks that moisture toward the eaves and you get sheathing rot at the edges where the roof meets the wall. We place open cell foam only where drying can happen, and we use closed cell or a vapor retarder at the roofline.
• Closed cell foam sprayed over compressed batts. Older Kirby attics often have R-11 fiberglass batts flattened under plywood decking. If a contractor foams over that without removing it, the closed cell traps moisture beneath the foam layer and mold grows on the drywall ceiling below. We remove the old material first, every time.
• Gaps around recessed can lights in 2000s tract homes. Can light penetrations are the biggest air leak in a Kirby tract attic. Installers sometimes skip the intumescent fire barrier around the fixture, which leaves a hot-air bypass. We seal and fire-block every can light before spraying.
• Skimped foam depth on roofline jobs. Closed cell foam needs 3 inches to hit code-level R-value and to act as a vapor barrier. Some contractors spray 1.5 or 2 inches and call it done. In Kirby’s humidity, that thin layer condenses moisture on the foam surface and drips onto whatever is below. We measure depth with a gauge and photograph every section.

Pricing for Spray Foam Insulation in Kirby, TX

We Also Serve Cities Near Kirby

Our crews work throughout San Antonio, Selma, Converse, and Leon Valley. If you’re in Kirby and your neighbor across the city line in San Antonio asks who did your foam job, send them our way. Read more about our full spray foam service area at Kirby or see how Spray Foam Insulation works across the region.

FAQs About Spray Foam Insulation in Kirby