Fast, Reliable Blown In Insulation Across Kirby
Blown in insulation in Kirby typically costs $1,450 to $3,700 for a full attic, depending on square footage, existing material removal, and air sealing needs. Most Kirby jobs are done in a single day. If you’re in Kirby and your 1950s or 60s ranch home still runs its AC nonstop through July and August, the attic is usually the first place we look. Our Blown In Insulation crews know Kirby’s housing stock: shallow attic cavities, settled rock wool, and east-side additions that were never sealed where old framing meets new. Call us at (361) 213-9499 and we’ll give you a written price before any work starts.
Why Aspen Attic Insulation San Antonio Is Kirby’s Preferred Blown In Insulation Company
We work in Kirby every week. That matters because Kirby’s homes are not like the newer construction in Schertz or Live Oak. A 1962 brick ranch off Ackerman Road has different attic geometry than a 2005 two-story, and our crews already know what they’ll find before they pull the ladder down. Kirby homeowners tell us the same thing: the air conditioner runs all afternoon, one bedroom stays hot, and the ceiling feels warm to the touch at 5 p.m.
Garrett Sloane set the standard for how we operate here: every technician’s name and photo is sent to you before the visit. The person who shows up is background-checked, identity-verified, and wearing a marked uniform with a photo ID badge. If anyone else arrives, that visit is free and we make it right. That protocol is called the Threshold Standard, and it’s how we’ve earned trust with Kirby families who are often home alone or have young kids in the house.
Our Kirby customers also get something most insulation companies won’t put on paper: a 365-day written guarantee covering labor and materials on every job. If the insulation settles, shifts, or underperforms within a year, we return and fix it at no charge. We’ve been doing this since 2002 as part of the Threshold Group family, and the promise is the same in Kirby as it is anywhere else we work.
Blown In Fiberglass Insulation in Kirby
Blown In Fiberglass Insulation is the most common fix we install in Kirby attics, and for good reason: it fills the uneven, shallow cavities of 1950s and 60s ranch homes better than batts ever could. Loose fiberglass fibers are blown under pressure into every corner, around old framing, and over settled rock wool. In Kirby, this work typically runs $1.75 to $2.60 per square foot installed, which puts a typical 1,200-square-foot attic between $2,100 and $3,100.
When a Kirby Home Needs It
You need blown fiberglass when your existing insulation has settled below R-11, which is common in Kirby homes that still have original rock wool from the Eisenhower and Kennedy eras. If the ceiling above your living room measures over 85 degrees in summer while the thermostat reads 74, the attic is failing you. Blown fiberglass at R-38 to R-49 can change that within a day.
What the Job Involves Here
Our crew removes loose debris and any rodent-damaged material, air-seals the major penetrations like plumbing vents and electrical chases, then blows Owens Corning AttiCat or GreenFiber to the target depth. In Kirby’s tight attics with limited headroom, we use a longer hose reach and work from the access point to avoid trampling existing framing. The result is an even blanket across the entire attic floor.
Loose Fill Insulation in Kirby
Loose Fill Insulation is the broader term for any insulation blown into place, and in Kirby it usually means either fiberglass or cellulose. For Kirby’s shallow attic cavities and older wall assemblies, loose fill is often the only practical retrofit because it conforms to irregular framing without cutting or fitting. Most loose fill attic projects in Kirby run $1,400 to $3,400 depending on depth and access, with wall cavity work typically higher because it requires drilling and patching.
Cellulose in Older Kirby Walls
GreenFiber cellulose, made from recycled paper treated with borate, works well in Kirby’s uninsulated wall cavities. We can dense-pack it into stud bays from the exterior or interior, which is a practical option when a 1960s brick home has nothing but air between the drywall and the brick veneer. This is slower work and costs more per square foot than attic blowing, but the difference in room comfort is immediate.
Fiberglass vs. Cellulose for Kirby Attics
In Kirby’s humid climate, both materials perform well in a properly vented attic. Fiberglass holds its loft longer and is less prone to matting from moisture, which matters in older slab-on-grade homes without vapor barriers. Cellulose provides better air-blocking if you skip a full air seal, but we always recommend sealing first. We’ll walk you through both options with written pricing before we start.
Trusted Brands We Service in Kirby
We stock materials from Owens Corning, Johns Manville, and GreenFiber, and we also work with Demilec when a Kirby homeowner needs spray foam for a specific cavity or crawlspace transition. Because we carry multiple brands, we’re never forced to install whatever happens to be on the truck. We match the product to the house. If you already know which brand you want, we’ll quote it specifically and put that in writing. For Kirby’s older home stock, Owens Corning AttiCat and GreenFiber cellulose are the two we use most often.
Common Blown In Insulation Problems We See in Kirby Homes
- Settled rock wool under R-11. Many Kirby homes still have their original 1950s rock wool, which settles to less than half its intended R-value in shallow attic cavities. The ceiling gets hot to the touch and the AC never cycles off.
- Pier-and-beam addition gaps. Older pier-and-beam additions over unsealed crawlspaces let blown insulation shift and leave bare spots at exterior wall tops. Hot attic air then pours down into the wall cavity.
- No vapor barrier on slab homes. Slab-on-grade ranch homes without a vapor barrier let humidity wick up into blown fiberglass, matting it down and cutting its R-value within a decade. This is a Kirby-specific pattern we check for on every job.
- East-side addition seams. Where an owner-built addition meets the original 1950s framing, there’s often a gap with zero insulation. We found a 14-foot seam like this off Ackerman Road, and the kitchen wall cavity was drawing hot attic air all day long.
Pricing for Blown In Insulation in Kirby, TX
A full attic blow-in for a typical Kirby ranch home runs $2,100 to $3,700, including removal of heavily settled old material, air sealing at major penetrations, and blowing to R-38 depth. Smaller attics under 900 square feet can land closer to $1,450 to $1,900. If you need wall cavities dense-packed, add roughly $2.50 to $4.00 per square foot of wall area. The biggest cost variables in Kirby are attic access, existing material removal, and whether we need to seal crawlspace transitions on pier-and-beam additions. Every quote we give is a written price before work starts, and it’s covered by the 365-day guarantee. Call (361) 213-9499 for a free estimate.
We Also Serve Cities Near Kirby
Our crews run scheduled jobs through Kirby and the surrounding communities every week. We serve San Antonio, Schertz, Universal City, and Live Oak with the same written pricing and 365-day guarantee. If you’re just outside Kirby and wondering whether we cover your street, call us and we’ll confirm on the spot.
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 Blown In Insulation in Kirby
Look in your attic for a loose, gray-brown, pebble-like material that looks like dirty cotton; that’s rock wool, and in Kirby homes of this era it’s almost always settled below R-11. Fiberglass is pink, yellow, or white and comes in batts or loose fluffy fibers. Call (361) 213-9499 and we’ll inspect it as part of a free estimate.
Yes, but only if the seam where the addition meets the original framing is air-sealed first; otherwise blown insulation will sit against the gap and hot air will still bypass it. This is the exact condition we found off Ackerman Road, where a 14-foot seam had zero insulation. We sealed it with foam and blew R-38, and the afternoon indoor temperature dropped 9 degrees.
In most Kirby attics we can blow directly over settled rock wool, provided it’s dry and not rodent-damaged; the new fiberglass or cellulose adds R-value on top and the old material doesn’t hurt performance. If there’s moisture matting or heavy debris, we’ll recommend removal first. We’ll tell you which applies to your attic during the free estimate.
Yes, attic insulation is the single biggest lever for cooling costs in Kirby pier-and-beam homes, but the crawlspace transition at exterior wall tops often needs air sealing too or you’ll keep losing conditioned air around the edges. Our crews check this junction on every older Kirby home we work on. Call us for a written quote that covers the attic and any crawlspace gaps.
Blown fiberglass in a properly vented Kirby attic typically maintains its R-value for 20 to 30 years; the bigger risk is moisture matting in slab homes without a vapor barrier, which can cut performance within a decade. We include a free second visit under the 365-day guarantee if anything settles or shifts. For an exact assessment of your attic’s current depth and condition, call (361) 213-9499.
If your Kirby home’s attic is running on 1960s rock wool or bare framing, we’ll give you a written price and a clear plan before any work begins. Call Aspen Attic Insulation San Antonio at (361) 213-9499 to schedule your free estimate.
Written by Garrett Sloane, Owner at Aspen Attic Insulation San Antonio, serving Kirby since 2002.