Fast, Reliable Spray Foam Insulation Across Kirby
Spray foam insulation in Kirby typically costs $1.50 to $3.80 per board foot for open-cell and $2.20 to $5.00 per board foot for closed-cell, with most attic retrofits in Kirby’s ranch homes landing between $2,800 and $6,500. We serve every corner of Kirby, from the tight lots along Binz-Engleman Road to the older subdivisions off Ackerman Road. Our crews know these homes because we’ve worked in dozens of them: shallow roof pitches, hallway closet attic hatches, brick veneer walls that bake in the afternoon sun. Call (903) 437-9164 and a live person answers, day or night.
Why Thistledown Insulation San Antonio Is Kirby’s Preferred Spray Foam Insulation Company
We show up to Kirby with shoe covers on before we step past your front door. That matters when you’ve got kids crawling on the hallway floor and a dog that investigates every stranger. Every technician who walks into your Kirby home is background-checked, uniformed, and trained to explain exactly what we’re doing before we do it.
Neil Barron leads our crews, and he holds them to the Cedarwell Care Promise on every single job: drop cloths from the door to the attic hatch, a photo of the clean-up before we leave, and quiet tools when a baby is napping upstairs. No exceptions.
Kirby homeowners call us because we answer the phone. Not a voicemail tree. A person. At 2 a.m. or 2 p.m., if you’ve got a question about your attic or a foam job we’re scheduling, you get a human voice. And every project starts with a written price before any work begins. That’s not an upgrade. It’s how we’ve operated since 2003.
Spray Foam Attic Insulation in Kirby
Spray foam attic insulation in Kirby usually runs $2,800 to $6,900 depending on attic square footage and whether we’re air-sealing the roofline deck or just the attic floor. The first thing we do in a Kirby attic is measure the clearance. Many of the ranch homes here built between the 1950s and 1970s have 4/12 roof pitches that leave fewer than 30 inches of working space at the eaves. Open-cell foam expands into those tight corners where blown-in fiberglass simply cannot reach.
Tight attic hatch access
Most Kirby attics are accessed through a hallway closet or garage ceiling panel. We’ve worked through hatches as small as 22×30 inches. Our equipment and our crew are sized for it. The foam hose goes up, the technician follows, and the job gets done without cutting a larger hole in your ceiling.
Air-sealing the roofline deck
In Kirby’s hot-humid climate, sealing the underside of the roof deck turns the attic into conditioned space. That means the air handling ducts in your attic stop sweating, the temperature in the attic drops by 30 to 40 degrees in August, and your air conditioner doesn’t fight a 140-degree attic all afternoon. For homes with ductwork in the attic, this is the single biggest comfort upgrade we perform in Kirby.
Spray Foam Wall Insulation in Kirby
Spray foam wall insulation in Kirby’s brick veneer ranch homes typically costs $3,200 to $7,800 for exterior wall retrofits using injection or pour methods. The west-facing walls here absorb solar gain from about 3 p.m. until sunset, and in a 1962 brick home with empty 2×4 cavities, that heat pushes straight through the drywall by dinner time. Open-cell foam injected into those wall cavities cuts that radiant transfer dramatically.
Brick veneer considerations
Kirby’s older brick homes need a careful hand. We inspect the weep holes along the bottom course of brick before we spray anything. Closed-cell foam applied incorrectly behind brick veneer can trap moisture and cause spalling. We take the time to get it right, and Neil Barron walks the wall with you before we start pumping foam.
West-facing wall relief
The unshaded west walls of Kirby’s ranch homes are the worst offenders. We’ve measured surface temperatures over 130 degrees on a late July afternoon. Once we inject foam into those 2×4 cavities, the interior wall temperature stabilizes, and the hallway stops feeling like a sauna by 6 p.m. It’s one of the most noticeable changes a Kirby homeowner can make without replacing windows or adding awnings.
Trusted Brands We Service in Kirby
We install Icynene, Demilec, and CertainTeed spray foam products, and we keep open-cell and closed-cell stock available for Kirby jobs on short notice. The Icynene open-cell foam is our default recommendation for the shallow attics and tight wall cavities we see across Kirby’s 1950s-70s subdivisions. It expands fully, air-seals those irregular cavity shapes, and doesn’t require tearing out roof decking to install. If your Kirby home needs a specific product line, call us and we’ll tell you exactly what we carry and what it costs before anyone schedules a visit.
Common Spray Foam Insulation Problems We See in Kirby Homes
- Uninsulated attic hatches. In Kirby’s older subdivisions, the attic access panel in a hallway closet or garage ceiling is often just a half-inch sheet of plywood with no weatherstripping. That single square foot of uninsulated surface leaks air all year and can make the hallway 6 to 10 degrees warmer than the rest of the house.
- Shallow roof pitches. The 4/12 and even 3/12 pitches common on Kirby’s ranch homes leave very little room at the eaves. Blown-in fiberglass cannot be installed evenly to the wall top plates. Open-cell spray foam conforms to the deck and seals those corners properly.
- Moisture trapped against unvented shingle roofs. Spray foam applied directly against the underside of Kirby’s asphalt shingle roofs, without proper ventilation or a thermal barrier plan, traps humid Gulf air and can rot the decking within five years. We assess each roof before recommending a foam strategy, and we will walk away from a job that would damage your home. That’s part of the 365-Day Done Right Promise.
- Narrow side yards and foam rig access. Many Kirby homes have side yards under 8 feet wide. Our foam rigs are positioned carefully, and we coordinate with neighbors when alley access is tight. We won’t block someone’s driveway or fence gate and leave it that way while we work.
Pricing for Spray Foam Insulation in Kirby, TX
A full open-cell attic retrofit in a 1,400 to 1,800 square foot Kirby ranch typically runs $3,400 to $5,800. A closed-cell attic job with a higher R-value per inch lands between $4,800 and $9,200. Wall injection for a 1960s brick veneer home usually falls in the $3,200 to $7,800 range depending on the number of exterior walls and how many cavities are empty. Rim joist spray foam, common in Kirby homes with pier-and-beam additions, runs $900 to $2,200. Garage ceiling foam ranges from $1,100 to $2,600. Every customer gets a written price before any work starts. Call (903) 437-9164 for a free estimate, and we’ll give you the exact number for your house, not a ballpark.
We Also Serve Cities Near Kirby
Our crews cover Kirby and the surrounding communities including Spray Foam Insulation in Kirby, plus San Antonio, New Braunfels, Boerne, and Cibolo. If you’re in one of those nearby cities and need the same detailed, written-price approach to Spray Foam Insulation, we’ll bring the same crews and the same Care Promise to your door.
Serving Kirby, TX - Our Local Coverage Area
We’re based in the Kirby 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 Spray Foam Insulation in Kirby
Yes. We regularly work through 22×30 attic hatches in Kirby’s older ranch homes. Our technicians and hoses fit through those openings without cutting a larger access panel. Call (903) 437-9164 and we’ll schedule a free attic inspection to confirm your hatch and clearance.
Yes, it does. Open-cell foam injected into empty 2×4 wall cavities on the west side of a Kirby brick home reduces the radiant heat transfer from direct afternoon sun. Homeowners typically notice the hallway or bedroom on that side staying within 2 to 3 degrees of the rest of the house after the job.
We crawl it. Our crew works in low-clearance attics with 28 to 34 inches of space at the eaves, using short hoses and applying open-cell foam directly to the underside of the roof deck. The low pitch actually makes open-cell the best choice there, because blown-in materials can’t be installed evenly along the wall top plates.
Spray foam is safe once it has cured, which typically takes 24 hours. We schedule the work so no one is in the home during installation, and we ventilate the space properly during and after the job. If you have specific concerns, Neil Barron will walk you through the product data sheet and the re-entry timeline before we start.
We can do just the hatch and the major bypass penetrations. That’s a $400 to $900 job in most Kirby homes, and it solves the biggest single air leak in the house. We’ll seal the hatch with a foam gasket and rigid board insulation, then foam the plumbing and electrical penetrations around the attic floor. It’s a small job with an outsized comfort impact.
Ready for us to take a look at your Kirby attic or walls? Call (903) 437-9164. A live person answers, and we’ll set a time that works for you. Your written price comes before anything gets sprayed, and the 365-Day Done Right Promise means if it isn’t right, we make it right. No debate, no fine print.
Written by Neil Barron, Owner at Thistledown Insulation San Antonio, serving Kirby with attic and spray foam insulation since 2003.