Fast, Reliable Attic Insulation Across Floresville
Attic insulation in Floresville costs between $1,800 and $4,600 for a typical 1,500 – 2,200 square foot home, with most projects completed in one day. We’re Thistledown Insulation San Antonio, and our crews work in Floresville weekly – we know the pier-and-beam houses near downtown, the ranch-style homes off Highway 181, and the newer subdivisions spreading toward the outskirts. When you call (903) 437-9164, a live person answers. No voicemail tree, no callback tomorrow. You’ll get a written price before any work starts, every single time.
Why Thistledown Insulation San Antonio Is Floresville’s Preferred Attic Insulation Company
Floresville homeowners deal with a specific problem: attic temperatures that climb past 140°F in July and August, coupled with humidity that works its way up from pier-and-beam crawl spaces. Most insulation crews treat Floresville like a generic South Texas town. We don’t. Our technicians have spent enough hours in the attics around the Wilson County Courthouse and along C Street to know exactly what they’ll find before they open the hatch: settled rock wool from the 1950s, unsealed balloon-framed wall cavities, and fiberglass batts that have baked so long they’ve lost their loft and their R-value.
Neil Barron leads our team, and he’s built the company around one promise: a written price before anyone picks up a tool. That’s not a sales gimmick. It’s the Cedarwell Care Promise, and it’s how every job runs. Shoe covers go on at the front door. Drop cloths go down across your hallway from the entry to the attic hatch. We ask before we move anything, respect quiet hours when kids are napping, and we photograph the clean-up before the van pulls away. The 365-Day Done Right Promise backs every install: if something isn’t right, we make it right. No debate, no fine print.
We coordinate scheduling from our San Antonio office, and we respond to Floresville service calls every business day, usually with next-day availability for estimates.
Blown In Insulation in Floresville
Blown in insulation in Floresville is the most common upgrade we install in older homes, because it’s the fastest way to get an under-insulated attic up to current code without tearing out ceiling drywall. We blow loose-fill fiberglass or cellulose across the attic floor to a consistent depth, typically R-38 to R-49 for this climate zone. The job takes one day for most single-story Floresville houses. Blown-in installation in Floresville runs $1,800 – $3,800 depending on square footage, depth, and whether we’re topping up existing insulation or starting from a bare attic floor.
Cellulose for Drafty Older Homes
GreenFiber cellulose is our go-to for Floresville’s pier-and-beam houses. It’s denser than fiberglass, which means it resists air movement better – a real advantage in attics connected to balloon-framed walls and unsealed crawl spaces. Cellulose also performs better in high heat: fiberglass loses effectiveness as attic temperatures climb, while cellulose holds its R-value more consistently.
When to Top Up vs. Remove
If your attic has less than six inches of existing insulation, we usually recommend removal and a fresh blow-in. At that depth, the old material is likely settled, compressed, and contaminated with years of dust and possibly pest debris. On a 1940s home near the Wilson County Courthouse, our crew found original rock wool settled to under three inches with no air sealing anywhere. We extracted the failed material, air-sealed the top plates and wall chases with closed-cell spray foam, then blew GreenFiber cellulose to R-38 and stapled a radiant barrier to the rafters. The homeowner told us the upstairs bedrooms stayed within three degrees of the first floor on a 100 degree afternoon.
Insulation Contractors in Floresville
Insulation contractors in Floresville vary widely in how they handle older homes, and the difference shows up in final results. A contractor who shows up, blows fiberglass over whatever’s already in the attic, and leaves has skipped the most important part of the job: air sealing. Floresville’s heat and humidity make air sealing non-negotiable. Our crews seal top plates, wall chases, duct penetrations, and any gaps around chimneys or plumbing vents before insulation goes in. Complete attic insulation replacement with air sealing in Floresville runs $2,900 – $4,600.
Attic Baffles and Ventilation Prep
Ventilation matters as much as R-value here. Attics that hit 140°F need airflow to stay functional and to protect roof decking from moisture damage. We install baffles in every rafter bay before blowing insulation, which keeps soffit vents open and prevents insulation from blocking airflow. For Floresville homeowners with existing gable or ridge vents, we’ll verify the system actually moves air before adding insulation on top of it.
Radiant Barrier Retrofit
In Floresville’s summer, a radiant barrier can reduce attic temperatures by 20 – 30 degrees, which takes significant load off your air conditioner and slows heat gain into living space. We staple it to the underside of rafters after insulation goes in. If your attic already has fiberglass batts that are in decent shape, adding a radiant barrier is often the better first step than replacing what’s already there.
Trusted Brands We Service in Floresville
We install and service insulation from Owens Corning, Johns Manville, and GreenFiber, and we stock common repair materials for Floresville jobs on our trucks rather than making customers wait for parts from San Antonio. For spray foam applications we work with Demilec closed-cell and open-cell products. The right product depends on your attic: an older pier-and-beam house with no wall insulation needs a different approach than a newer ranch home with batt insulation but no air sealing. We’ll explain the difference in plain English, and we’ll put the price in writing before you decide anything.
Common Attic Insulation Problems We See in Floresville Homes
- Settled rock wool in pre-1960 attics. Original insulation in courthouse-area homes has usually compressed to under four inches, leaving the ceiling plane thermally transparent. The problem compounds over pier-and-beam crawl spaces that feed humid air upward.
- Unsealed attic bypasses around balloon-framed walls. In Floresville’s older homes, open wall cavities act like chimneys, pulling superheated attic air into living space. Your AC runs constantly while the attic stays above 140°F.
- Moisture condensing on old roof decking. Humid air migrating from crawl spaces into unconditioned attics condenses on the underside of roof sheathing. Homeowners misdiagnose this as a roof leak and replace shingles when the actual problem is air sealing and ventilation.
- Baked and ineffective fiberglass batts. Fiberglass loses performance as temperatures climb. In Floresville attics that hit 140°F, old batts may be delivering less than half their labeled R-value. Radiant barrier and blown-in cellulose both perform better in this heat.
Pricing for Attic Insulation in Floresville, TX
A basic blown-in fiberglass job in a 1,200 square foot Floresville attic starts around $1,800. Full attic insulation replacement with air sealing and radiant barrier on a 2,000 square foot older home runs $3,800 – $4,600. Attic batt insulation installation typically falls between $1,500 and $3,200, while spray foam runs higher due to material cost. What moves the number: attic square footage, whether old insulation needs removal, how much air sealing is required, and whether you’re adding radiant barrier. You’ll have your exact written price before we touch a rafter. Call (903) 437-9164 for a free estimate – estimates are free, and the number doesn’t change unless you change the scope.
We Also Serve Cities Near Floresville
Our crews serve Attic Insulation in Floresville and the surrounding communities, including Cibolo, San Antonio, New Braunfels, and Boerne. If you’re in one of those areas and need Attic Insulation, the same written-price promise and 365-Day Done Right Promise applies. Call us and we’ll schedule a walk-through at a time that works for your family.
Serving Floresville, TX - Our Local Coverage Area
We’re based in the Floresville 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 Attic Insulation in Floresville
The insulation has likely settled and failed, and the attic is probably unsealed. Older Floresville homes with balloon framing have open wall cavities that pull hot attic air into upstairs rooms. Your existing insulation may also be degraded: fiberglass batts lose performance above 120°F, and Floresville attics routinely exceed 140°F in summer. Removing failed material, air sealing wall chases and top plates, and blowing in cellulose to R-38 usually solves the problem. Call (903) 437-9164 and we’ll inspect it.
Yes, in most cases. A radiant barrier attached to the rafters reflects heat before it reaches your batts, dropping attic temperatures 20 – 30 degrees. That extends the life of your fiberglass and cuts cooling costs. If your batts are already baked and flat, you’ll get better results replacing them along with adding the barrier. We can quote both options separately so you see the difference in writing.
We recommend it. Pier-and-beam crawl spaces feed humid air upward into unconditioned attics, where it condenses on roof decking and causes mold and rot. If the crawl space is unsealed, you may be adding insulation on top of a moisture problem. We’ll check the crawl space during our inspection and tell you what needs to happen first, in what order, and what each step costs.
If the rock wool is under four inches thick, settled, or contaminated with pest debris, it needs to come out before new insulation goes in. Blowing over failed material doesn’t restore performance and can trap moisture. Removal adds to the job cost but ensures the new insulation actually works. We’ll show you what’s in the attic and give you a written price for removal versus top-up before you make a decision.
Closed-cell spray foam handles humidity best because it acts as both an insulation and an air and vapor barrier. But it’s also the most expensive option. For most Floresville homes, the practical answer is blown-in cellulose with proper air sealing and ventilation – GreenFiber cellulose resists moisture-related settling and holds its R-value in high heat. Call (903) 437-9164 for a specific recommendation for your house.
Ready to Talk? Call Neil and the Thistledown Team
We’re happy to walk your Floresville attic, show you what’s up there, and explain your options without pressure. You’ll get a written price before any work starts, shoe covers on your floors during the visit, and a photo of the clean-up before we leave. The 365-Day Done Right Promise means if something’s not right, we come back and fix it. Call (903) 437-9164 now – a live person answers, day or night.
Written by Neil Barron, Owner at Thistledown Insulation San Antonio, part of the Cedarwell family since 2003.