Trusted Insulation Removal & Replacement for San Antonio Homeowners
Old, damaged, or contaminated insulation doesn’t just make your home uncomfortable. It works against you every single day, driving up cooling costs through San Antonio’s brutal summers and letting allergens, pest waste, and moisture problems fester where you can’t see them. We’re Walt’s Insulation, locally owned and owner-operated since 2000, and we’ve removed and replaced failing insulation in thousands of San Antonio attics and crawl spaces over the past 25 years. When you call (866) 751-4428, a real person answers. Not a voicemail, not a call center. And we can usually get a crew to your San Antonio home same day or next day, depending on the scope of the job.
What Our Insulation Removal & Replacement Service Includes
Removing old insulation is the first step, but it’s not the whole job. What matters is what happens after: replacing it with material that actually performs in San Antonio’s climate, sealing the gaps that let conditioned air escape, and making sure the job is done right enough to carry a lifetime guarantee. Here’s exactly what we handle under our Insulation Removal & Replacement cost guide.
Attic Insulation Removal
Attic insulation removal means vacuuming out the existing material layer by layer until we reach the attic floor decking. Most San Antonio homes built before 2000 have fiberglass batts or loose-fill that have settled, compressed, or been torn apart by rodents, and it’s no longer doing much of anything. We use high-powered commercial vacuums with sealed containment bags, so none of that fine dust and fiberglass particulate gets released through your living space. Once the attic is empty, we inspect the decking for moisture damage, animal entry points, and air leaks before any new material goes in.
Contaminated Insulation Removal
Contaminated insulation is insulation that has been soaked, soiled, or saturated by something you don’t want in your home. In San Antonio, we most often see this after roof leaks, AC overflow pan failures, rat or raccoon infestations, and water heater ruptures that soak through the ceiling into the attic insulation below. Rodent droppings, urine, and nesting material in the insulation are a genuine health concern – raccoon roundworm and hantavirus are both documented in Texas. We remove contaminated material in sealed bags using full containment protocols, then sanitize the affected area before installing fresh insulation.
Vermiculite & Old Insulation Removal
Vermiculite insulation is the loose, pebbly material with a shiny, mica-like texture that was common in homes built before 1990. Older vermiculite from the Libby, Montana mine is known to contain asbestos, and while not every batch does, the EPA recommends treating any vermiculite as suspect until tested. If you have vermiculite in your San Antonio attic, do not disturb it yourself; we’ll bring in a licensed asbestos testing partner, and if it tests positive, we coordinate abatement through certified professionals before we proceed with the insulation replacement. If it tests negative, we remove it using standard containment and move on to installation.
Insulation Replacement
Insulation replacement means installing new material after the old stuff is out, and the right choice depends on where it’s going and what your home actually needs. For most San Antonio attics, we recommend blown-in fiberglass or cellulose to a depth that gives you an R-38 to R-60 rating – in this climate, higher R-value in the attic is the single biggest lever for cutting summer cooling bills. We work with Owens Corning, CertainTeed, GreenFiber, and Knauf products, and for walls or hard-to-reach cavities, we also install spray foam from Demilec and Icynene. Every replacement job includes air sealing at the attic floor: plumbing penetrations, wire chases, recessed can lights, and top plates, because new insulation can’t do its job if conditioned air is still rushing out through the gaps.
What happens when you call
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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.
Brands We Service for Insulation Removal & Replacement
Over 25 years, we’ve pulled out and replaced just about every insulation product ever installed in a South Texas home. That matters because removal is different depending on what you’re dealing with. CertainTeed fiberglass batts from the 1990s come out in clean sections but leave behind a heavy dust load that needs proper vacuuming before any new install. GreenFiber cellulose is denser and often settles into corners and odd attic geometry, which means our crews spend extra time working around trusses and HVAC ductwork to get every last bag of it out.
On the replacement side, we install CertainTeed and Owens Corning blown-in fiberglass for most San Antonio attics because both hold their loft in high heat and humidity. For wall cavities and band joists, Demilec and Icynene closed-cell spray foam give you the best air-sealing performance per inch. Whether you’re replacing old CertainTeed batts, failed Icynene foam that was installed wrong by a previous contractor, or any other make, we can handle the removal and the reinstall. No brand loyalty required just because it’s what’s already in your house.
Signs You Need Insulation Removal & Replacement Right Now
- Your cooling bills keep climbing while your AC runs nonstop. San Antonio summers push every attic to its limit, but if your insulation has settled to R-19 or less, your air conditioner is fighting a losing battle. Removing and replacing under-insulated material typically cuts cooling costs 15 to 30 percent in this climate.
- You’ve had rodents in the attic at any point in the last decade. Rats and squirrels tunnel through insulation, compress it into useless patches, and contaminate it with droppings and urine. Even after you trap the animals, the contaminated insulation stays behind; complete removal and replacement is the only way to get a clean slate.
- You see water stains on ceilings below attic spaces. A roof leak or AC overflow that soaked your ceiling almost certainly soaked the insulation above it too. Wet fiberglass and cellulose collapse, lose almost all R-value, and create perfect conditions for mold. Insulation that’s been wet needs to come out; drying it in place is not a real fix.
- Your insulation looks flat, old, or barely covers the joists. If you can see attic floor joists poking through the insulation from the attic hatch, you have maybe R-11 to R-13 of effective coverage. San Antonio homes need R-38 minimum in the attic, and most benefit from R-49 to R-60 given how hard our ACs work from May through October.
- Your home is 30 years old and you’ve never touched the insulation. Fiberglass and cellulose both degrade over time: settling, dust accumulation, moisture exposure, and pest activity all take their toll. If your house was built in the 1990s or earlier with original insulation, it’s not just under-performing; it’s well past its useful life.
Our Insulation Removal & Replacement Process - Step by Step
We’ve done enough removals across San Antonio to know that homeowners want to understand what’s happening in their attic, not just receive a hand-waved explanation. Here’s exactly how the job goes. If the old insulation needs to come out for health or contamination reasons, we also recommend having us check the home‘s air sealing condition while the attic is bare and easy to inspect.
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Assessment and measurement. We start with a full attic walkthrough: measuring existing insulation depth, checking for moisture, identifying air leaks, and documenting any pest or mold issues. You get photos of everything we find, not just a verbal summary. We’ll also measure square footage precisely so the quote is for your actual space, not a rough guess.
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Containment setup. Before any vacuum starts running, we seal the attic access with plastic sheeting and tape, lay down floor protection, and run sealed hoses from the attic to a commercial vacuum unit outside or in the garage. This keeps fiberglass dust, cellulose particles, and any contaminants from circulating through your living areas during the removal.
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Complete removal. Our crew vacuums the attic down to the decking, removing every layer of old insulation, loose debris, and pest nesting material. For batt insulation, we bag it by hand and lower it out. Throughout the process, we’re watching for anything that shouldn’t be there: mold, roof deck rot, wire damage, or structural issues that need attention before new insulation goes in.
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Air sealing and prep. With the attic empty, we seal plumbing penetrations, electrical wire chases, recessed light housings, ceiling fan boxes, and top plates using foam sealant and caulk appropriate for each application. This is the step that separates a real insulation job from a “blow and go” job, and it’s the biggest driver of long-term comfort and energy savings.
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New insulation installation. We blow in the new material to the agreed R-value, checking depth with measuring cards across the entire attic to ensure consistent coverage. Every job is walked by a lead technician before we pack up, and every job comes with the Done Right Promise: if it’s not done right, we make it right, no runaround.
How Much Does Insulation Removal & Replacement Cost in San Antonio?
A typical attic insulation removal and replacement in San Antonio runs $2,800 to $6,500 depending on attic size, insulation type, and whether you’re adding air sealing or contaminated-material handling. Simple blown-in replacement over a clean 1,200-square-foot attic might land around $2,800 to $3,500, while a larger home with rodent contamination requiring full containment, sanitizing, air sealing, and R-60 blown-in can push into the $5,000 to $7,000 range. Vermiculite removal with professional asbestos testing adds testing and abatement coordination costs on top of the base removal.
What moves the price: attic square footage and roofline complexity, the type of insulation being removed (cellulose comes out slower than fiberglass), whether contamination protocols are needed, the R-value target for the new material, and whether you bundle air sealing. We quote it as one line-item price with no surprise add-ons, and every estimate is free. We also offer a no-obligation second opinion on any written estimate you’ve received, and there’s no trip charge inside our service county. Call (866) 751-4428 and we’ll schedule a walkthrough at a time that works for you.
Insulation Removal & Replacement Near San Antonio - Our Service Area
Walt’s Insulation is based close enough to be the one down the road, not a contractor crossing three counties. We serve San Antonio proper and surrounding communities throughout Bexar County and beyond, with typical response times of same day or next morning for most jobs. Homeowners in Insulation Removal & Replacement in Houston, Insulation Removal & Replacement in Spring, and Insulation Removal & Replacement in The Woodlands also rely on us for the same straight-talking service. Owner Walt Brenner started this business in 2000, and he still answers for the work personally.
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 - Insulation Removal & Replacement in San Antonio
Insulation Removal & Replacement - Pasadena and San Antonio customers: the process is vacuuming or bagging out old, damaged, or contaminated insulation from your attic, walls, or crawl space, then installing new insulation to current recommended R-values. In San Antonio, the most common driver is either age-related degradation or contamination from rodents, water, or mold. We remove everything down to the decking, air seal the space, and install new material suited to your home’s construction and our climate.
Most single-family attic insulation removals and replacements in San Antonio, or Insulation Removal & Replacement in Humble, take one full day, sometimes two for larger homes or contaminated-material jobs that require extra containment and sanitizing. A standard 1,500-square-foot attic with simple blown-in replacement is usually a one-day job for our crew. We’ll give you a specific timeline when we quote the project so you’re not guessing.
Insulation removal alone, without replacement, typically runs $1,200 to $2,800 depending on attic size, material type, and whether contamination protocols are required. Contaminated insulation removal with full containment runs higher because it involves sealed handling, sanitizing, and disposal. We’ll always quote removal and replacement as separate line items, so you can see exactly where the money goes. Call (866) 751-4428 for an exact quote, and remember we offer a free second opinion on any written estimate you’ve already received.
Yes. We’ve removed and replaced insulation from every major manufacturer installed in San Antonio homes over the past 30 years: CertainTeed, Owens Corning, Johns Manville, Knauf, GreenFiber, and closed-cell spray foams from Demilec and Icynene. The removal technique adjusts based on the material and how it was installed, but no brand is off the table. On the replacement side, we recommend materials based on what your home actually needs, not what we’re trying to move off a warehouse shelf.
Yes, in most cases. If you’ve had a roof leak soak your attic insulation, or a rodent infestation has gotten out of hand, call us right away. A live person answers 24/7 at (866) 751-4428, and we can often get a crew out the same day or next morning to assess the damage and start the removal process. Removing wet or contaminated insulation quickly prevents mold growth and further structural damage, so don’t wait if you see water stains on ceilings or smell something stale in the attic space.
Every insulation removal and replacement job we install comes with the Done Right Promise: lifetime workmanship, guaranteed. If the insulation settles, fails, or wasn’t installed to the standard we promised, we make it right, no runaround and no charge. That’s the promise Walt Brenner built this company on in 2000, and it’s the reason we don’t need to hide behind fine print.
Clear a path to the attic access, move any vehicles out of the driveway if we’ll be running a vacuum hose to a truck or trailer, and cover or move items in the rooms directly below the attic hatch. Our containment setup catches nearly all dust, but it’s smart to cover bedding and electronics in adjacent rooms anyway. We handle all the plastic sheeting, floor protection, and cleanup; you shouldn’t need to do anything beyond basic access prep.
Schedule Your Insulation Removal & Replacement Service in San Antonio Today
Old insulation isn’t going to fix itself, and another San Antonio summer is coming fast. Call (866) 751-4428 right now and you’ll reach a live person at Walt’s Insulation. We’ll set up a free, no-obligation walkthrough, give you an honest quote line by line, and if the old insulation needs to come out, we’ll schedule the removal at a time that works for you. Seniors and veterans always save 10 percent, and every job we do carries the Done Right Promise for life.
Written by Walt Brenner, Owner at Walt’s Insulation, serving San Antonio since 2000.