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, TX typically costs $1.80-$3.20 per board foot for open-cell and $3.50-$5.50 for closed-cell, with most whole-home retrofits running $4,200-$8,800 depending on cavity condition and access. We’re usually on-site in Kirby within 24-48 hours of your call, and dispatch routes through our San Antonio office to keep crews local. If your Kirby ranch was built between the 1950s and 1970s, there’s a strong chance your exterior walls have little or no insulation behind that brick veneer, which is exactly why we start every Kirby job with probe holes and a blower-door test, not a guess. Call (830) 420-0953 for a written price before any work starts.

Call (830) 420-0953

Why Topside Attic Insulation Converse Is Kirby’s Preferred Spray Foam Insulation Company

We’ve sealed and insulated more than 9,000 homes since 2016, and Kirby’s concentration of post-WWII ranch housing makes it one of the most predictable retrofit markets we serve. The city is small enough that we know its patterns: the slab-on-grades near Ackerman Road, the brick-veneer ranches along FM 78, the homes that went up fast for Randolph AFB families and never got proper wall insulation. Kirby customers leave three-star reviews when contractors skip the wall cavities they can’t see; we earn better ones by documenting what we find with photos and blower-door numbers.

Our response time to Kirby averages same-day or next-day for standard calls, because crews are already rotating through Converse, Universal City, and Live Oak. Every Kirby job gets a written scope, a written price, and a written warranty before anyone lifts a tool. Under Haven Standard: Have it in writing. Calls are answered by a live person 24/7, no voicemail loops.

Our Spray Foam Insulation Services in Kirby

Closed-Cell Spray Foam

Closed-cell spray foam is our go-to recommendation for Kirby’s 1960s-70s ranches with empty wall cavities or moisture-prone crawlspaces. At roughly R-6.5 per inch, it acts as its own vapor retarder, which matters in Bexar County’s humid subtropical climate where summer attic temperatures exceed 150°F and winter cold snaps like February 2021’s Storm Uri can freeze poorly sealed envelopes. We source closed-cell products from Owens Corning and Demilec, and we never spray over unsealed top plates or can lights. The homeowner on that Ackerman Road job we mentioned? Their blower-door reading dropped from 4,200 CFM50 to 2,100 after we sealed and sprayed. They got the before-and-after numbers in writing.

Open-Cell Spray Foam

Open-cell runs lighter and less expensive at roughly R-3.6 per inch, and it breathes more than closed-cell, which can be useful in Kirby’s older attic spaces where moisture management already struggles. But we’re careful where we specify it. Open-cell foam applied over a 1970s slab-on-grade ranch’s brick veneer without a vapor retarder traps Kirby’s humid subtropical moisture against the back of the brick. We’ve seen the sheathing rot within a few seasons. Our Spray Foam Insulation team probes first, then recommends. If your Kirby home has brick veneer with no cavity insulation, open-cell may not be the right call for that assembly.

Rim Joist Spray Foam

Kirby’s military-era speculative ranches often have crawlspace framing that was never properly squared, and many contractors skip the rim joist entirely because it’s awkward to access. That’s a mistake. The rim joist is where your floor system meets the foundation, and in a 150°F Kirby attic, unsealed rim joists let that heat bleed straight into your conditioned space. We dense-pack or spray the rim joist on every applicable job, and we photograph the work because it’s the detail most homeowners will never see but will feel on their July electric bill. Our crews carry Johns Manville and Knauf products for rim joist work, matched to the specific assembly we’re sealing.

Garage Ceiling Spray Foam

Many Kirby ranches have attached garages with bedrooms above or ductwork running through the ceiling plane. That ceiling is a thermal boundary, and if it’s uninsulated or holding degraded batts from 1972, you’re paying to condition the garage. We treat garage ceilings as part of the full envelope, not an afterthought. Same written price, same photo documentation, same blower-door verification where the garage is tied to the house HVAC.

Spray Foam Roof Deck

Spray foam applied directly to the underside of the roof deck turns your Kirby attic into a conditioned space, which is often the only practical upgrade path when knee walls are nonexistent or when HVAC equipment lives in the attic. In Kirby’s climate, where attic temperatures routinely hit 150°F, a foamed roof deck can drop that space to within 10-15 degrees of your living area. We specify closed-cell for roof decks in Kirby because of the humidity load, and we always ventilate properly to code. This is not a DIY application; the chemicals, the pressurized equipment, and the confined-space work require trained technicians with documented safety protocols.

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Trusted Brands We Service in Kirby

We source spray foam and complementary insulation materials from Owens Corning, Johns Manville, and Knauf, among others. No proprietary lock-in, no house brand pushed for margin. For Kirby jobs, this means we can match the right product to the specific assembly we’re treating, whether that’s closed-cell for a roof deck, open-cell for a conditioned attic, or dense-pack cellulose from GreenFiber for wall cavities where spray foam isn’t the right call. Our San Antonio warehouse stocks core products for fast turnaround on Kirby schedules, and we publish the brand and spec on every written scope so you know what you’re getting.

Common Spray Foam Insulation Problems We See in Kirby Homes

• Empty exterior wall cavities behind brick veneer. We probe walls before quoting on every Kirby job, and we regularly find nothing but drywall against brick in 1960s-70s ranches. Contractors who quote sight-unseen miss this entirely, then thin the foam or under-bid the job to make margin. You end up with a partially treated house and a bill you didn’t expect.
• Moisture-trapped open-cell over brick. Kirby’s humid subtropical climate means vapor drive is real. Open-cell foam sprayed against the back of brick veneer without a proper retarder traps moisture, rots sheathing, and creates a mold risk that doesn’t show up for two or three seasons. We specify the assembly, not just the product.
• Skipped rim joists in crawlspaces with out-of-square framing. The builder-era crawlspaces in Kirby’s military housing were built fast, not square. Rim joist foam gets skipped because it’s hard to reach and harder to make look clean. We don’t skip it. We photograph it.
• Attic blow-ins over unsealed air leaks. Some Kirby homeowners have already paid for “new insulation” that was blown over leaky top plates, can lights, and duct chases. The R-value looks good on paper, but the air leakage nullifies it. We seal first, then insulate. In that order. Every time.

Pricing for Spray Foam Insulation in Kirby, TX

We Also Serve Cities Near Kirby

Our crews rotate daily through Kirby, Converse, Universal City, Live Oak, and Windcrest, which keeps response times short and scheduling flexible across eastern Bexar County. If you’re near the border between Kirby and one of these neighbors, we’ll confirm your service area when you call and route the closest available crew.

FAQs - Spray Foam Insulation in Kirby