Fast, Reliable Blown-In Insulation Across Boerne
Blown-in insulation in Boerne typically runs $1.80-$3.20 per square foot of attic space, with most complete attic jobs falling between $2,400 and $5,800 depending on accessibility, existing conditions, and whether air sealing is needed first. We’re usually on-site in Boerne within 24-48 hours of your call, and we carry enough Owens Corning and GreenFiber material on every truck to complete standard jobs without a return trip. That’s important here, because Boerne’s spread-out Hill Country properties, from the acreage off Balcones Creek to the newer subdivisions near I-10, mean long drives back to the San Antonio office for forgotten materials. Our crews dispatch from there, but they serve Boerne with dedicated stock. Call (830) 529-7780 and a live person will answer, 24/7.
Why Topside Attic Insulation Boerne Is Boerne’s Preferred Blown-In Insulation Company
We’ve sealed and insulated over 9,000 homes since 2016, and a significant share of those have been in Kendall County. Boerne homeowners leave reviews that mention the same thing repeatedly: we show up with the written price already in hand, and we leave with blower-door numbers that prove what changed. Our 365-Day Done Right Promise applies to every job in Boerne, backed by Haven Standard Clause 1 - flat price, written scope, written warranty before anyone lifts a tool.
Response time to Boerne matters because attic conditions here deteriorate fast. A crew can typically reach properties in the Esperanza area, the historic core near Main Street, or the acreage west of Boerne Stage Road within 45 minutes of leaving San Antonio. We don’t give callback windows measured in business days. Calls are answered by a live person who can schedule directly.
Local knowledge that other contractors miss: Boerne’s elevation at 1,400 feet on the Edwards Plateau creates larger diurnal temperature swings than San Antonio experiences. Insulation that performs adequately at 700 feet often underperforms here. We size our blown-in top-ups and dense-pack installations for both extremes, not just summer heat.
Our Blown-In Insulation Services in Boerne

Blown-In Fiberglass
We install Owens Corning blown fiberglass in Boerne attics where the existing insulation has settled but the thermal barrier is otherwise intact. Fiberglass doesn’t absorb moisture, which matters in Boerne’s dry Hill Country climate where humidity is low but temperature differentials are severe. We typically spec R-38 to R-49 for attics here, higher than minimum Texas code, because of the metal-roof radiant heat gain common in subdivisions like Esperanza and the I-10 corridor developments. Every blown-in fiberglass job includes air sealing of top plates, can lights, and penetrations before the blower runs. No exceptions.

Blown-In Cellulose
GreenFiber cellulose works well in Boerne’s older homes near Main Street and in any structure where we’re filling empty wall cavities or topping off existing loose-fill. Cellulose has slightly better resistance to air movement than fiberglass, though both require an air-sealed envelope to perform to spec. We don’t recommend cellulose in attics with active roof leaks or chronic condensation, but those conditions are rare in Boerne’s dry climate. Our crew will tell you straight if your attic isn’t a candidate.

Dense-Pack Wall Insulation
Boerne’s 2000s-2020s production homes often have insulated attics but empty or poorly filled exterior walls, especially around plumbing chases and behind tubs. Dense-pack wall insulation - cellulose or fiberglass blown at high density into closed cavities - addresses this without tearing out drywall. It’s particularly valuable in slab-on-grade homes where the first floor is the only thermal buffer between living space and the Edwards Plateau limestone. We’ve dense-packed walls in properties from the older neighborhoods near River Road to newer builds off Boerne Stage Road where the builder skipped wall insulation entirely.

Blown-In Top-Up
This is our most common service call in Boerne. Builder-grade blown fiberglass settles over 5-10 years, and in Boerne’s dry conditions with large temperature swings, that settling accelerates. A blown-in top-up brings attic insulation back to spec without removing what’s there, assuming the existing material isn’t contaminated. We measure depth across the attic floor, identify settled areas around the attic hatch and top plates, and blow new material to achieve uniform R-value. In the Esperanza subdivision off I-10, our crew topped up a 2018 stone-and-stucco home with a metal roof that had builder-grade fiberglass settled to an R-19 despite a stated R-30. We used Owens Corning blown fiberglass to bring it to R-49 and added a radiant barrier, cutting attic temps from 152°F to 128°F on a 98°F day. The homeowner, who wanted it done right in one trip, was relieved we carried everything on the truck.

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.
Trusted Brands We Service in Boerne
We source blown-in materials from Owens Corning, Johns Manville, Knauf, GreenFiber, and Icynene, with no proprietary lock-in that limits what’s available for your job. Our Boerne crews carry Owens Corning blown fiberglass and GreenFiber cellulose on every truck, so we’re not driving back to San Antonio for material mid-job. Demilec spray foam is available for hybrid jobs where blown-in needs complementing with air sealing at the roof deck. We don’t claim exclusive status with any manufacturer. We pick the material that matches the building, the budget, and the performance target documented in your written scope.
Common Blown-In Insulation Problems We See in Boerne Homes

- Builder-grade blown fiberglass settles under Boerne’s dry conditions. The Hill Country’s low humidity and large temperature swings cause loose-fill fiberglass to compact faster than in more humid climates. We regularly find R-30 spec material measuring R-19 or lower in attics less than ten years old, with the top plate and attic hatch completely exposed and convective loops cycling conditioned air out of the living space below.
- Metal roofs common in Hill Country-style subdivisions supercharge radiant heat gain. The stone-and-stucco homes in Esperanza and similar I-10 corridor developments often have standing-seam or corrugated metal roofing that turns attics into solar ovens. Standard blown insulation, even at full thickness, can’t block radiant transfer. We pair blown-in top-ups with radiant barrier installation when the roof deck is accessible.
- Hard freezes like Winter Storm Uri expose under-insulated areas around plumbing in slab-on-grade homes. Boerne’s 2021 freeze burst pipes in exterior walls and soffits where blown insulation hadn’t been dense-packed or topped up properly. The elevation here means winter lows dip lower than San Antonio’s, and the limestone substrate doesn’t provide the thermal mass that clay soils do in lower areas.
- New subdivisions built to minimum Texas energy code are already under-performing. The fastest-growing parts of Boerne - master-planned communities along I-10 and FM 474 - were insulated to pass inspection, not to perform in 150°F attic summers and single-digit winter nights. Upgrading these relatively new homes is now the dominant insulation opportunity in Kendall County.
Pricing for Blown-In Insulation in Boerne, TX
Most blown-in insulation jobs in Boerne fall into these ranges:
| Service | Typical Range |
|---|---|
| Blown-in fiberglass top-up (1,500-2,500 sq ft attic) | $1,800 - $3,400 |
| Complete blown-in fiberglass replacement with air sealing | $3,200 - $5,800 |
| Dense-pack wall insulation (per 1,000 sq ft of wall) | $2,400 - $4,200 |
| Blown-in cellulose top-up | $1.90 - $3.10 per sq ft |
| Radiant barrier with blown-in top-up | $2,800 - $5,200 |
What moves the price: attic accessibility (steep pitches and limited hatch sizes add labor), whether existing insulation must be removed rather than topped, and the extent of air sealing required before blowing. Every job gets a Written Price Before Any Work Starts - Haven Standard Clause 1 - with no change orders unless you add scope. We also offer a Free Second Opinion on any written estimate from another contractor; bring us their scope and we’ll read it with you. Call (830) 529-7780 for scheduling. Estimates are free, and your written price arrives before anyone touches a tool.
We Also Serve Cities Near Boerne

Our crews work throughout Kendall County and the surrounding Hill Country, including Boerne proper, Bulverde to the south, Helotes and San Antonio along I-10 east, and Canyon Lake to the northeast. Rural acreage properties outside Boerne city limits are fully in our service area; we size our trucks and material loads for one-trip completion because long return drives to the San Antonio office waste your time and ours. Blown-In Insulation service details and technical specifications are available on our main service hub.
Serving Boerne, TX - Our Local Coverage Area
We’re based in the Boerne 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 - Blown-In Insulation in Boerne

Your attic is hitting 150°F because standard blown fiberglass doesn’t block radiant heat transfer, and metal roofs radiate downward intensely. The builder likely installed just enough fiberglass to meet minimum code, which in Boerne’s climate is insufficient for metal-roof performance. We add a radiant barrier at the roof deck and top up the blown insulation to R-49, which typically drops attic temperatures 20-30°F on identical outdoor days. Call (830) 529-7780 and we’ll measure what you’ve got against what you need - estimates are free.
Yes. At 1,400 feet on the Edwards Plateau, Boerne runs 5-10°F colder on winter nights than San Antonio, and hard freezes penetrate deeper into the building envelope. Winter Storm Uri proved this in February 2021, when Kendall County saw sustained single-digit temperatures that burst pipes in under-insulated walls and soffits. Insulation sized for San Antonio’s milder lows often underperforms here. We spec for both extremes, not just summer cooling loads.
Settled builder-grade blown fiberglass that no longer meets its labeled R-value. Homes in Esperanza and similar I-10 corridor developments were insulated to pass 2018 Texas energy code, not to perform in 150°F attic heat or hard freezes. The dry Hill Country air and large temperature swings accelerate settling. We find R-30 spec material measuring R-19 or lower in attics less than six years old, with exposed top plates and attic hatches creating thermal bypasses.
Cellulose resists air movement slightly better than fiberglass and performs well in Boerne’s low-humidity climate, where moisture absorption isn’t a concern. However, cellulose also settles over time, and both materials require air sealing first to achieve rated performance. We don’t default to one material; we match the product to the attic condition, the accessibility, and the performance target in your written scope. GreenFiber cellulose and Owens Corning fiberglass are both stocked on our Boerne trucks.
Yes. We size every truck for one-trip completion, which matters on rural properties where the nearest supply house is a long drive. Our crews carry Owens Corning blown fiberglass, GreenFiber cellulose, radiant barrier material, and full air-sealing stock. For dense-pack wall work, we bring the specialized hoses and compressor setup. The only exception is spray foam, which requires a separate rig and is scheduled accordingly. Call (830) 529-7780 to confirm material availability for your specific job - estimates are free, and your written price arrives before work starts.
Written by Wes Okafor, Owner at Topside Attic Insulation Boerne, serving Boerne and Kendall County under The Haven Standard since 2016.