Fast, Reliable Attic Insulation Across Kirby
Most attic insulation jobs in Kirby run $1,800-$4,500 depending on whether we’re topping up existing material or replacing decades-old batts in a mid-century ranch. We dispatch crews from our San Antonio office and typically reach Kirby homes same-day or next-day for estimates. Call (830) 243-6352 for a written price before any work starts.
Kirby’s a unique market. This fully built-out enclave city, completely surrounded by San Antonio, is packed with 1950s-1970s slab ranches built when Texas had no meaningful attic insulation code. Those attics hit 150°F in July. Original fiberglass batts, if they exist at all, have settled to near nothing. We’ve sealed and insulated over 9,000 homes since 2016, and Kirby’s density of uninsulated legacy housing makes it one of the highest-ROI retrofit markets in Bexar County. Our Attic Insulation team knows the permitting, the housing stock, and the specific failure modes this enclave produces.
Why Topside Attic Insulation New Braunfels Is Kirby’s Preferred Attic Insulation Company
We’ve worked enough Kirby addresses to know the pattern. The ranch off FM 78 with the 1962 build date and bare rafters. The house near Kirby Middle School where the homeowner’s been told three times they need “more insulation” without anyone checking if the soffits are vented. We pull City of Kirby permits, not San Antonio’s. That distinction matters here.
Our crews are background-checked and uniformed. Calls are answered by a live person 24/7, no voicemail loops. Every job starts with a written price and written scope, Haven Standard Clause 1, and ends with a Documented Photo Record. On air-sealing jobs, we publish before-and-after blower-door numbers so you see the actual performance change, not just a promise.
The 365-Day Done Right Promise applies to all completed work. If it’s not done right, we make it right. We’ve operated under The Haven Standard since 2016, and we don’t ask you to trust us for how long we’ve been around. We show you the documentation.
Our Attic Insulation Services in Kirby
Blown-In Attic Insulation
Blown-in fiberglass or cellulose is the workhorse for Kirby’s mid-century ranches. We use Owens Corning and GreenFiber materials, blown to code depth across the attic floor after air sealing is complete. Most Kirby homes need R-38 to R-49, which typically means 12-15 inches of settled depth. We never blow over unsealed top plates or can light penetrations. Sealed first, then insulated. The blower-door test confirms the result.
Attic Batt Insulation
Batt insulation has a place in Kirby, mostly in knee walls, attic hatches, or specific framed cavities where blown material won’t stay put. We use Johns Manville batts cut to fit, not stuffed. In Kirby’s older homes, poorly installed batts are often the original problem, compressed into gaps or installed with face paper upside-down. We remove and replace when batt is the right solution, not as a default.
Attic Insulation Top-Up
Some Kirby homes have partial insulation, maybe 3-4 inches of settled fiberglass from a 1980s upgrade. A top-up can work if the existing material is dry, uncontaminated, and the attic floor is already sealed. We inspect first. If we find rodent damage, moisture staining, or compressed R-5 batts from 1964, we recommend full replacement. No point in burying a problem.
Attic Insulation Replacement
This is the most common scenario in Kirby. We remove original 1950s-1970s fiberglass batts, or the nothing-at-all that passes for insulation in some of these tract homes. We haul it out, seal the envelope, install baffles at the soffits for ventilation, and blow new material to full depth. Typical range: $2,800-$4,500 for a 1,200-1,800 square foot Kirby ranch. You get the photo record, the blower-door numbers if air sealing is included, and the written warranty.
Attic Baffles & Ventilation Prep
Kirby’s mid-century attics were built without soffit baffles. Insulation gets stuffed against the eaves, blocking airflow. The attic becomes a convection oven. We install proper baffles at every soffit vent to maintain the intake path, then blow insulation to the edge without blocking it. This is standard on every replacement job we do in Kirby. Without it, you’re just trapping heat.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Before
AfterTrusted Brands We Service in Kirby
We source from Owens Corning, Johns Manville, Knauf, and GreenFiber, among others. No proprietary lock-in. For Kirby customers, this means we match the material to the application, not the other way around. Owens Corning blown-in fiberglass for standard attic floors. GreenFiber cellulose when we’re targeting specific sound-dampening or pest-resistance properties. Knauf batts for precise cavity work. We stock common materials locally, so Kirby jobs don’t wait on freight.
Common Attic Insulation Problems We See in Kirby Homes
- Original fiberglass batts compressed to R-5 or less. The 1950s-1970s batts in Kirby ranches were thin to begin with, often 2-3 inches. Sixty years of heat cycling and gravity have flattened them to ineffective mats. We’ve pulled batts that measure half an inch.
- No soffit baffles, blocked ventilation, and 140°F+ trapped air. Kirby’s slab ranches were built with minimal ventilation design. Insulation gets pushed against soffits, blocking intake. The attic superheats and cooks what’s left of the insulation. We see this on nearly every 1960s ranch we open.
- Permits filed through San Antonio instead of the City of Kirby. Out-of-area crews don’t know Kirby is its own municipality. They file with San Antonio, lose days to rejection, then fail inspection because the work wasn’t permitted correctly. We pull City of Kirby permits from the start.
- Ice storm exposure from February 2021. That freeze killed pipes across Bexar County in homes with no attic insulation and no wall cavities. Kirby’s slab ranches were especially vulnerable, heat rising straight through the ceiling. Post-freeze, we’ve replaced insulation in dozens of Kirby homes where the event exposed how thin the thermal envelope really was.
Pricing for Attic Insulation in Kirby, TX
Here’s what attic insulation costs in Kirby’s market:
| Service | Typical Range |
|---|---|
| Attic Insulation Top-Up (existing material in good condition) | $1,800-$2,800 |
| Attic Insulation Replacement (remove old, seal, blow new) | $2,800-$4,500 |
| Attic Baffles & Ventilation Prep (add to replacement job) | $400-$700 |
| Air Sealing + Blower-Door Verification (add-on) | $800-$1,400 |
Factors that move the number: attic square footage, accessibility (some Kirby ranches have hatches in closets with 6-foot clearances), existing material condition, and whether we need to remediate rodent damage or moisture staining. We don’t give ballpark guesses. We inspect, measure, and deliver a written price before any work starts. Free estimates. Free Second Opinion on any written estimate from another contractor. Call (830) 243-6352.
We Also Serve Cities Near Kirby
Our crews work throughout the corridor. We handle Attic Insulation in Kirby along with New Braunfels, Cibolo, Seguin, and Schertz. Same written price guarantee, same documentation, same live-answer dispatch.
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 - Attic Insulation in Kirby
You need a City of Kirby permit. Kirby is an independent municipality with its own building department, not a San Antonio subdivision. Out-of-area crews routinely file with San Antonio, get rejected, and delay your project by days or weeks. We pull City of Kirby permits on every job. Call (830) 243-6352 and we’ll confirm the permit status on your specific address.
No. Original 1960s fiberglass batts in Kirby have compressed, degraded, and often harbor rodent debris or moisture staining. We remove and replace. The energy math doesn’t work for topping up over failed material. We inspect first, document with photos, and show you what we found before recommending replacement. Estimates are free.
Your attic hits 150°F because it’s uninsulated or under-insulated, likely with no soffit baffles to vent the superheated air. Newer suburbs built to 2000s+ codes have R-38 minimum, proper ventilation, and sealed envelopes. Kirby’s 1950s-1970s ranches were built before those codes existed. The difference is structural, not cosmetic. We measure the actual R-value and the blower-door leakage to show you exactly what you’re losing.
Yes. That freeze exposed how severely under-insulated Kirby’s slab ranches are for cold events. Heat rose straight through ceilings with no thermal barrier. Pipes froze in walls and attics that had never been properly insulated. Since 2021, we’ve replaced insulation in dozens of Kirby homes where the freeze was the wake-up call. The fix is the same: seal the envelope, insulate to code depth, verify with documentation.
You need both for a complete fix, or insulation alone if budget is immediate. A radiant barrier reflects radiant heat from the roof deck, which helps in Kirby’s 140°F+ summer attics. But it does nothing to stop conductive heat flow through an uninsulated ceiling in winter. We assess your specific attic and give you the numbers for each approach. Call (830) 243-6352 for a written comparison.
Written by Wes Okafor, Owner at Topside Attic Insulation New Braunfels, serving Kirby and surrounding communities under The Haven Standard since 2016.