Fast, Reliable Spray Foam Insulation Across Kirby
Spray foam insulation in Kirby typically runs $2.50 – $6.00 per board foot installed, with most whole-attic jobs landing between $3,800 and $7,500 depending on foam type and square footage. We get crews to Kirby homes same-week, often same-day, because we know these ranch-style houses from the 1950s through 1970s and the exact places hot air sneaks in. If you need a quote fast, call (361) 213-9499 and a live person answers, not a voicemail tree. Our Kirby customers get a written price before any work starts, and the technician’s name and photo before anyone rings the doorbell.
Why Aspen Attic Insulation San Antonio Is Kirby’s Preferred Spray Foam Insulation Company
Kirby homeowners keep our number for one reason: we show up exactly as described. Every technician is background-checked, identity-verified, and arrives in a clean marked uniform with a photo ID badge at the door. Before the visit, you receive the tech’s name and photo by text or email. If anyone else arrives, the visit is free and we make it right. That protocol is the Threshold Standard, and it’s non-negotiable on every Kirby job.
Garrett Sloane runs our crews with the belief that an insulation company should be the most predictable contractor you hire all year. We don’t send a different face every time. We send a named person, a written price, and a 365-day Done Right Promise covering labor and materials. If a repair fails within that year, we return free.
Kirby’s mix of small ranch homes and larger acreage lots means some jobs are tight attic crawls and others are sprawling outbuildings. Our teams handle both from the same truck, and we stock the materials to do it without scheduling a second trip. That matters when your east-side addition has been leaking air into the living room for forty years.
Spray Foam Insulation Contractors in Kirby
Spray Foam Insulation Contractors in Kirby do two things most older homes never got: they seal air leaks and add real R-value in the same pass. Most Kirby ranch homes still have original rock wool or thin fiberglass batts in wall cavities too shallow for modern code. Open-cell foam expands into those 2×4 cavities and stops the air movement that fiberglass can’t. Closed-cell foam adds structural rigidity and a vapor barrier, which matters on humid Kirby afternoons. Expect to pay $2.50 – $4.50 per board foot for open-cell and $4.00 – $6.00 for closed-cell installed in Kirby.
Air Sealing Rim Joists and Wall Tops
Older Kirby homes leak air where the walls meet the attic. Our crews spray foam along the top plates and rim joists so conditioned air stays in the living space. This is not a small detail. On a 1950s ranch, open wall-top plates can equal leaving a window cracked all summer.
One-Trip Detached Workshop Treatment
Kirby acreage lots often include detached garages, shops, and storage buildings with no insulation at all. We spray the roof deck or wall cavities in a single visit, no electrical work needed. Garret’s crews bring enough material to handle the whole outbuilding the first time.
Spray Foam Attic Insulation in Kirby
Spray Foam Attic Insulation in Kirby means treating the attic floor or the roofline depending on how the house breathes. Kirby attics from the 1950s and 60s are typically vented with low headroom, which makes batt installation slow and gap-prone. Spray foam fills the entire cavity, including the edges batt installers can’t reach. A typical 1,200-square-foot Kirby attic runs $4,200 – $6,800 for open-cell on the floor or $5,500 – $7,500 for closed-cell along the roofline.
Roofline Foam for Unvented Attics
When homeowners want to convert attic space or move ductwork out of the heat, foam along the roofline creates a sealed, semi-conditioned attic. In Kirby’s humidity, this approach must include a plan for moisture. We cover that in the written estimate and explain exactly what we’re spraying and why.
Radiant Barrier and Air Sealing Combo
On vented attics, closed-cell foam around the perimeter air leaks plus a radiant barrier across the rafters cuts Kirby cooling loads more than insulation alone. We price the combo honestly so you see the cost of each piece before we start.
Trusted Brands We Service in Kirby
We install spray foam from Icynene, Demilec, and CertainTeed, choosing the formulation that fits a Kirby home’s specific leak pattern and humidity exposure. We keep the most common material kits stocked for Kirby jobs, so a rim joist sealing or small addition job doesn’t wait on a warehouse order. The foam brand matters less than the installer’s mix ratio and attention to Kirby’s shallow wall cavities, but we don’t stock off-brands or whatever was cheapest this month. Spray Foam Insulation is all we do, so our Kirby customers get a specialist, not a general handyman with a foam gun.
Common Spray Foam Insulation Problems We See in Kirby Homes
- Foam sprayed over rock wool without removal. Kirby’s original rock wool settles and hides gaps. Spraying foam over it leaves those gaps unsealed and wastes R-value in a shallow 1950s wall cavity. We remove or encapsulate the old material first.
- Off-ratio foam from hot-weather mixing. Two-part spray foam mixed incorrectly on a 98°F Kirby afternoon cures sticky and never reaches full R-value. It has to be scraped out and re-sprayed, which costs a homeowner twice. Our techs check mix temperature on every job.
- Foam against a vented roof deck with no moisture plan. Kirby’s humidity can drive moisture into the sheathing if foam is sprayed directly under a vented roof deck without baffles or a radiant barrier. We inspect the attic’s ventilation before recommending roofline foam at all.
- Missed wall-top plates on east-side additions. Those later back-room additions on Kirby’s east side often leave open wall-top plates where hot attic air pours into living spaces. Cameras show us the gap; spray foam seals it. This is the single most common fix we make in Kirby ranch homes.
Pricing for Spray Foam Insulation in Kirby, TX
Open-cell spray foam in Kirby runs $2.50 – $4.50 per board foot. Closed-cell runs $4.00 – $6.00 per board foot. A standard attic floor in a 1,100 – 1,400-square-foot ranch home typically lands between $3,800 and $6,500 before any prep work. Removing old rock wool or fiberglass adds $1.50 – $2.50 per square foot. Rim joist sealing alone usually comes in at $950 – $1,800 depending on the home’s footprint. Wall cavity injection for existing ranch homes runs $4,500 – $8,000 depending on how much access we have. Every Kirby estimate is written, itemized, and delivered before we spray anything. Call (361) 213-9499 for your number.
We Also Serve Cities Near Kirby
Our crews cover Spray Foam Insulation in Kirby and the surrounding area daily, including San Antonio, Schertz, Universal City, and Live Oak. If you’re a few miles from Kirby, the same pricing and the same written-guarantee protocol apply. We schedule by your neighborhood, not our convenience.
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
Open-cell spray foam works well in low-clearance Kirby attics because it’s applied with a wand, not batts that need room to unroll. The applicator can reach into tight eaves and around trusses without standing upright, and the foam expands to fill the cavity from a single access point. Most Kirby ranch attics can be fully insulated in four to six hours. Call (361) 213-9499 and we’ll tell you if your attic qualifies.
Yes, and that gap is exactly the kind of leak we flag on nearly every Kirby east-side home. The seam where a later addition ties into the original roofline often leaves a direct path from the attic into the living space. Spray foam bridges that seam, and once it cures, that room stops fighting the central AC. We find and seal those transitions on every ranch remodel we touch in Kirby.
We can. Spray foam is applied from a truck-mounted unit with hoses run to the shop, so no building electrical is needed for the insulation itself. The equipment runs off the truck. For Kirby acreage workshops and barns, we typically spray the roof deck or wall cavities in one day and the building is usable by evening. A written price comes before we start.
In most cases, yes. Kirby’s original rock wool was often installed at half the depth modern codes require, and it hides gaps and settled areas that foam alone won’t fix. Removing it lets us inspect the top plates and air seal them properly before reapplying insulation. The cost is added per square foot, and we’ll show you the line item in your estimate.
A 1960s slab-on-grade ranch in Kirby typically loses cooled air through the attic faster than through the slab. Spray foam seals the attic plane and the wall-top leaks, so the central AC runs shorter cycles during Kirby’s 95°F-plus summer days. Many Kirby homeowners notice a cooler back bedroom within the first week. Call (361) 213-9499 for a free estimate and we’ll walk your attic with you before quoting anything.
Written by Garrett Sloane, Owner at Aspen Attic Insulation San Antonio, serving Kirby with background-checked crews and written pricing since 2002.