Trusted Blown In Insulation for San Antonio Homeowners
Blown In Insulation in San Antonio typically costs $1.50 to $3.80 per square foot installed, with most attics in the 1,500 to 2,500 square foot range landing between $2,300 and $7,500 total. The work usually takes one day, and we’re available for same-week scheduling across Bexar County. Aspen Attic Insulation San Antonio has been insulating homes since 2002, and we back every job with our 365-Day Done Right Promise in writing, covering labor and materials for a full year. Call (361) 213-9499 and a live person answers, day or night. We’ll give you a written price before any work starts, with the technician’s name and photo sent to you before we arrive.
In neighborhoods like Alamo Heights, Terrell Hills, and Castle Hills, homes built before 1990 often carry R-11 to R-19 in the attic. San Antonio’s summers punish that. We regularly see attics in Kirby and Live Oak with settled cellulose barely covering the ceiling joists. The fix is straightforward, and it starts with an honest assessment of what’s up there now.
Cellulose Insulation
Cellulose insulation is loose, recycled paper fiber treated with fire retardant and blown into attic floors or wall cavities to form a continuous thermal blanket. It’s a strong choice for San Antonio’s older pier-and-beam homes in Alamo Heights and Terrell Hills, where irregular joist spacing makes batt insulation a poor fit. Aspen Attic Insulation San Antonio installs cellulose at $1.50 to $2.80 per square foot depending on depth and access, with a written price handed to you before the hose comes out of the truck.
Dense-Pack Wall Retrofit
Older San Antonio homes in neighborhoods like Jefferson and Beacon Hill often have empty wall cavities. We dense-pack cellulose into those cavities through small access holes, raising the wall’s R-value without tearing out drywall. The material settles minimally and cuts the drafts that make rooms on the west side of the house feel like ovens in July.
Fire-Retardant Treatment
Our cellulose comes from GreenFiber and CertainTeed, both of which treat their product with borate-based fire retardant at the factory. That treatment stays active for the life of the insulation. It also deters cockroaches and silverfish, which is a real concern in San Antonio’s humid climate.
Blown In Attic Insulation
Blown in attic insulation means loose fibers, either cellulose or fiberglass, mechanically blown across the attic floor to the depth required for a target R-value. It’s the fastest and least disruptive way to bring a San Antonio attic from R-19 to R-38 or R-49, the levels that actually matter for our 100-degree summers. We install blown in attic insulation for $1.50 to $3.80 per square foot, and the job is typically finished in four to six hours.
R-Value Verification
We don’t guess at depth. Before we start, we measure what’s already in the attic with a depth gauge and calculate the existing R-value. Then we blow to the exact height that gets you to R-38 or R-49. After the job, we show you the depth in multiple spots so you know the number on the quote matches what’s under your feet.
Air Sealing First
Insulation doesn’t fix leaks. In thousands of San Antonio attics, Garrett Sloane and his crews find gaps around recessed lights, plumbing vents, and top plates that let conditioned air pour into the attic. We seal those penetrations with foam before we blow, because R-49 with a leaky ceiling is still a hot house. That’s part of the written price, not an add-on.
Blown In Cellulose Insulation
Blown in cellulose insulation is the specific application method where treated recycled paper fibers are blown through a hose into the attic or wall to a set density and depth. It’s a smart pick for San Antonio homes in Live Oak and Converse, where the material’s higher density helps it resist the air movement that plagues vented attics. Our blown in cellulose insulation runs $1.50 to $2.80 per square foot, and the material includes factory-applied fire retardant from GreenFiber or CertainTeed.
Settling and Coverage Reality
Cellulose settles about 13 to 20 percent in the first two years. We account for that. When we quote an R-38 job, we blow the settled thickness so that five years from now it’s still performing at the level you paid for. If you’ve had cellulose installed before and you’re seeing bare joists, it was likely under-blown on day one, not a material failure.
Sound Dampening Bonus
One thing homeowners in Helotes and Fair Oaks Ranch appreciate about blown in cellulose is how it quiets the house. It’s denser than fiberglass, so it deadens sound from outside, rain on the roof deck, and foot traffic. If you live under a flight path near Lackland AFB, that’s not a minor detail.
Blown In Fiberglass Insulation
Blown in fiberglass insulation is loose glass fiber, typically white or pink, blown across the attic floor with a specialized machine to create an even, non-settling thermal layer. It’s lighter per square foot than cellulose, which matters in San Antonio homes where older drywall ceilings in Castle Hills or Terrell Hills can’t carry much extra weight. Our blown in fiberglass insulation runs $1.80 to $3.80 per square foot, and we carry product from Knauf and Johns Manville.
Non-Settling Performance
Fiberglass doesn’t settle like cellulose. The fibers hold their loft over time, which means the R-value at year ten is the R-value at day one, assuming no roof leaks or pest activity. For San Antonio homeowners in Bulverde and Fair Oaks Ranch with larger, open attics, we often recommend fiberglass because coverage stays consistent over long spans.
Moisture Resistance
San Antonio’s humidity is hard on attics. Fiberglass doesn’t absorb or hold moisture the way untreated cellulose would, which makes it a better fit for homes with minor roof leaks that haven’t been caught yet. If the attic is dry, it’s a wash. If there’s a slow drip near a vent, you’ll be glad the insulation doesn’t turn into a sponge.
Loose Fill Insulation
Loose fill insulation is the broader category that includes both cellulose and fiberglass products installed by blowing rather than rolling or spraying. It’s the right choice for any San Antonio attic with uneven joists, low clearance, or existing insulation that’s too thin but not contaminated. Our loose fill insulation installations run $1.50 to $3.80 per square foot, with a written quote before any work starts and a 365-day guarantee in writing.
Top-Off Jobs
Half the attics we see in Schertz and Universal City have some insulation, just not enough. If the existing material is dry and mold-free, we can blow fresh loose fill right on top to reach R-49 without a removal job. That’s the most cost-effective path for most homeowners, and we’ll tell you honestly whether it’s an option after we inspect.
Full Removal and Replacement
Sometimes the attic has rat droppings, old water damage, or insulation that’s been compacted to nothing. In those cases, topping off isn’t responsible. We remove the old material, sanitize, seal the ceiling plane, and blow fresh loose fill to the right depth. It costs more, but it’s the only way to fix the underlying problem instead of covering it up.
Blown In Insulation Contractors
Blown in insulation contractors are the people who show up with the machine, the hose, and the responsibility for getting the depth right and the mess cleaned up. Not all of them are equal in San Antonio. Aspen Attic Insulation San Antonio sends background-checked, identity-verified technicians in clean marked uniforms, with a photo ID badge at the door and the tech’s name and photo sent to your phone before we arrive. Our blown in insulation work runs $1.50 to $3.80 per square foot, with a written price and a 365-day written warranty, plus a free second visit if the work fails.
The Threshold Standard
Every Aspen Attic Insulation technician operates to The Threshold Standard, which means identity verification before hiring, ongoing background checks, photo-badged arrival, and a named contact who is accountable for your job from start to finish. If anyone other than the technician we named shows up at your door, the visit is free and we make it right. That’s in writing, every time.
Licensed, Insured, and Answering the Phone
We’re state-licensed, insured, and bonded, and part of the Threshold Group family since 2002. Call (361) 213-9499 at 2 a.m. or 2 p.m. A live person answers, takes your information, and gets a technician scheduled. You’ll never sit in a voicemail loop with us. That matters when your attic hits 140 degrees in August and you realize the insulation has failed.
Brands We Service
We work daily with GreenFiber cellulose, and we know its settled-depth curves for San Antonio’s climate. We adjust blow rates and depth targets for GreenFiber’s specific density so the R-value you’re quoted is the R-value you live with five years later.
We also install CertainTeed fiberglass and cellulose products. Their fiberglass holds loft well in San Antonio’s vented attics, and we’ve run enough of it through our machines to dial in the exact blower settings for even coverage across long joist bays. We also carry Demilec spray foam products for homes where air sealing and insulation need to happen in one pass. Whether you have GreenFiber, CertainTeed, Demilec, or any other make already in your attic, we can assess it and recommend the right next step. The home to comfort starts with knowing what’s actually up there.
Signs You Need a Pro Right Now
- Rooms that never cool down, even with the AC running. If your thermostat says 72 but the back bedroom in Castle Hills sits at 80, your ceiling is conducting heat. That’s an insulation problem, not an AC problem, and replacing the unit won’t fix it.
- Bare ceiling joists visible in the attic. Walk up with a flashlight. If you can see the tops of the joists, you have less than R-19. That’s miles from where a San Antonio attic should be, and you’re paying for it every month.
- Ice or frost in the attic on the rare cold snap. Warm air leaking into a cold attic condenses on the roof deck. It rots plywood and rusts nails. That’s why we air seal before we blow.
- Energy bills climbing while rates stay flat. In Fair Oaks Ranch and Helotes, CPS Energy bills should dip in spring. If they don’t drop, heat is moving through your ceiling in both directions. Insulation is the first thing we check.
- Rodent droppings or nesting material in the insulation. Rats and mice ruin blown in insulation, flattening it and contaminating it with urine and droppings. That’s a removal and replacement job, and it needs to happen before the damage spreads.
Our Process, Step by Step
Step 1: Written Estimate and Technician Photo
You call (361) 213-9499. A live person answers, asks about your home, your concerns, and your attic. Before the visit, we send you the name and photo of the technician who will show up, so there are no surprises at the door.
Step 2: Attic Inspection and Measurement
The technician arrives in a clean marked uniform with a photo ID badge. We inspect the attic for moisture, mold, rodent activity, and existing insulation depth. We measure square footage and calculate the current R-value. You get those numbers, plain and simple.
Step 3: Written Price Before Work Begins
We hand you a written quote that includes the materials, the labor, the depth target, and the total cost. No verbal numbers, no handshake pricing. If you approve it, we schedule the work. If you don’t, you keep the quote and we shake hands and leave.
Step 4: Air Sealing and Insulation Installation
On install day, we seal the ceiling penetrations, set up containment if needed, and blow the insulation to the specified depth. We use depth gauges throughout, not just at the hose end. Every room above is checked before we call the job done.
Step 5: Walkthrough and 365-Day Promise
We show you the finished attic, the measured depth in multiple spots, and leave you with a written 365-Day Done Right Promise covering labor and materials. If anything fails in the next year, we return and fix it for free, no questions, no argument. That’s the deal, in writing, every time.
How Much Does Blown In Insulation Cost in San Antonio?
A typical Blown In Insulation pricing job in San Antonio runs $1.50 to $3.80 per square foot. For a 2,000-square-foot attic getting topped off from R-19 to R-38, that means roughly $3,000 to $7,500 total. Attics under 1,200 square feet often land between $1,800 and $3,500. These are installed prices, including materials, labor, and cleanup.
What moves the number? Depth, first. R-49 costs more than R-38 because it’s roughly 4 extra inches of material. Access matters too. Attics with low clearance, steep pitches, or no walkway slow the crew down. Removal of old insulation adds cost if there’s contamination from rodents or moisture. And air sealing is included in our written quote, not billed as a surprise line item at the end.
How do you avoid overpaying? Get a written price that names the material, the target R-value, and the total cost before any work starts. If a contractor won’t put it in writing, walk. Our estimates are free, and they don’t expire. Call (361) 213-9499 and we’ll send a technician to measure, inspect, and quote. You’ll know the number before we touch the hose.
Our Service Area Near San Antonio
Aspen Attic Insulation San Antonio serves the entire San Antonio metro area, including Alamo Heights, Terrell Hills, Castle Hills, Kirby, Live Oak, Converse, Helotes, Fair Oaks Ranch, Bulverde, and Lackland AFB. We also run crews to Blown In Insulation in Schertz and Blown In Insulation in Universal City weekly. Typical response is same-day for emergencies and within 48 hours for standard estimates across the metro.
Serving San Antonio, TX - Our Local Coverage Area
We’re based in the San Antonio area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
Frequently Asked Questions About Blown In Insulation in San Antonio
Blown in insulation is loose-fill material, usually cellulose or fiberglass, installed by blowing it through a hose into attic floors or wall cavities. It creates a continuous thermal layer that blocks heat transfer between your living space and the outdoors. In San Antonio, blown in insulation is the most practical way to bring an attic from R-19 to R-38 or R-49 without tearing out drywall or rebuilding the roof. Blown In Insulation in San Antonio jobs typically take one day.
Most San Antonio attics take 4 to 6 hours to insulate, including air sealing and cleanup. Larger homes in Fair Oaks Ranch or Bulverde can run a full day. Removal and replacement jobs take longer, usually 1 to 2 days depending on contamination and access. We schedule with a written time window so you’re not waiting around all day.
Blown in insulation in San Antonio runs $1.50 to $3.80 per square foot installed. A 2,000-square-foot attic typically lands between $3,000 and $7,500. The price depends on target R-value, attic access, and whether old insulation needs removal. Call (361) 213-9499 for an exact quote, and we’ll put it in writing before any work starts.
Yes. If you’ve had a roof leak, a rodent invasion, or a ceiling collapse that exposed your attic, call (361) 213-9499 and we’ll triage it over the phone. A live person answers 24/7. We keep same-day slots for San Antonio homeowners with water-damaged or contaminated insulation because the problem compounds fast in our climate.
Yes, we install GreenFiber and CertainTeed products regularly, and we know their settled-depth and blow-density characteristics for San Antonio attics. We also carry Knauf, Johns Manville, and Demilec products so the material matches the house, not the other way around. If you have a preference, tell us and we’ll quote it exactly.
Every job carries our 365-Day Done Right Promise in writing. It covers labor and materials for a full year. If the insulation settles, fails, or doesn’t perform to the specified R-value within 365 days, we return and fix it for free. No prorated terms, no service fees, no argument.
Clear a path to the attic access, move any stored items away from the hatch, and let us know about any known wiring issues or past pest problems. We handle the rest, including floor protection and cleanup. If you have pets, keep them in a separate room during the install. We’ll walk you through everything when we call to confirm your appointment.
Schedule Your Blown In Insulation Service in San Antonio Today
A hot attic doesn’t fix itself, and every San Antonio summer costs you real money if your insulation is thin or failing. Call (361) 213-9499 for a free, no-obligation estimate. A live person answers 24/7, you’ll get a written price before any work starts, and the technician’s name and photo come to your phone before we knock. That’s the Threshold Standard, and it’s been our way since 2002.
Written by Garrett Sloane, Owner at Aspen Attic Insulation San Antonio, serving San Antonio since 2002.