Owens Corning Wall Insulation in San Antonio: What to Know First
Owens Corning wall insulation service in San Antonio typically runs $1.80 to $4.20 per square foot depending on whether you need drill-and-fill injection foam, exterior wall retrofits, or interior soundproofing, and most jobs are completed in one day. We’re an independent Owens Corning service provider, meaning we work on Owens Corning products every week but we’re not tied to their corporate pricing or their playbook. We tell you what your San Antonio house actually needs, not what a national quota says to sell. If your walls are under-insulated or you’re tired of hearing every car that drives down your street, call (866) 751-4428 and you’ll get a live person, not a voicemail.
How Owens Corning Products Fail - and How We Fix Them
Owens Corning makes good insulation. But nothing lasts forever in San Antonio’s heat, and we’ve seen the same failure patterns show up in house after house. Here’s what we find most often:
- EcoTouch fiberglass batts settling and slumping in older wall cavities. This is the biggest one. EcoTouch batts were never great in vertical cavities where humidity swings cause the fibers to lose loft over the years. By year ten or twelve, the top 18 inches of a wall cavity can be bare. We pull the old batts, check the cavity for moisture damage, and either blow in Owens Corning AttiCat fiberglass if the wall is accessible or switch to injection foam for a denser fill.
- Foamular XPS rigid board gaps at rim joists and exterior sheathing. Foamular panels don’t shrink, but the seams between them absolutely do open up as a house moves. The result is air channels that let conditioned air escape and outdoor air sneak in. On San Antonio’s 100-degree days these gaps turn wall cavities into ovens. We seal the seams with compatible foam sealant and re-flash any penetrations.
- Thermafiber mineral wool compacted by DIY or rushed installations. Thermafiber is a solid product for soundproofing, but it loses its acoustic and thermal value when crammed into a cavity too small for the batt. We see this constantly in walls that a previous contractor stuffed to finish quickly. We spec the right batt width for the actual stud spacing and install it without compression.
- Moisture trapped behind foam injection jobs where drainage wasn’t considered. Closed-cell injection foam is great for wall retrofits, but it’s unforgiving if you inject into a cavity that already has a small leak or old weep holes that aren’t clear. The foam holds the moisture against the sheathing and you get rot you can’t see from inside. We check for existing moisture issues before we ever drill the first hole, and we won’t inject into a wall that’s already wet.
- Improperly mixed or under-applied foam on retrofit jobs. This isn’t an Owens Corning product defect, it’s an installer defect. But homeowners don’t always know the difference. If the two-component foam wasn’t mixed at the right temperature or the tech rushed the application, you get pockets of un-expanded foam that do almost nothing. We use moisture meters and thermal imaging after every wall job to verify the fill is actually there.
Our Owens Corning Wall Insulation Process
We’ve been doing this since 2000, and the process hasn’t changed much because it works:
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You call (866) 751-4428. A live person answers. We ask about your house, your comfort complaints, and your energy bills. No script, no call center.
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We schedule the site visit. No trip charge inside our service county. One of our background-checked techs shows up in a uniform at the time we said they would.
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We diagnose the actual problem. We walk the house, check the walls with a thermal camera, look for moisture, and figure out what’s really going on. That means pulling an outlet cover or two and sometimes drilling a small inspection hole.
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We tell you what we’d do if it were our house. That may mean Owens Corning products, or it may mean a different brand that’s a better fit. We’re not married to any one manufacturer, and we’ll tell you why we’re recommending what we’re recommending.
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We install it right, and we test it. We drill, fill, patch, and clean up. Then we verify the fill density and air seal with our diagnostic tools before we pack up.
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You get the Done Right Promise. Lifetime workmanship. If it’s not done right, we make it right. That’s the whole promise, and it’s in writing.
What Owens Corning Wall Insulation Costs in San Antonio
Here’s the honest numbers for San Antonio wall work, not a national chart:
- Drill-and-fill injection foam into existing walls: $2.80 to $4.20 per square foot
- Blown-in fiberglass into open wall cavities: $1.80 to $2.60 per square foot
- Foamular rigid board on exterior sheathing or rim joists: $3.00 to $4.50 per square foot
- Interior wall soundproofing with Thermafiber: $2.50 to $3.80 per square foot
What actually moves the price: access to the wall cavities (exterior siding that can’t be removed cleanly costs more), the condition of the existing insulation, whether we find moisture or pest damage, and the total square footage on the job. Bigger jobs cost less per square foot because setup time is spread out. Every estimate is upfront and itemized. Call (866) 751-4428 for a free estimate, and if you’ve got another written quote, bring it in and we’ll give you a free second opinion. No trip charge in our county. And if you’re a senior or veteran, it’s always 10% off, not just when there’s a holiday to market around.
Why San Antonio Homeowners Call Walt’s Insulation for Owens Corning Work
We’re the one down the road. Not a franchise with a rotating crew, not a national chain that subcontracts to whoever’s available that week. Walt Brenner started this company in 2000 after watching too many San Antonio homeowners get sold insulation that didn’t match the South Texas climate, and we still answer the phone ourselves, 24/7. We answer the phone live - talk to a real person, get a straight answer. Our techs are background-checked and uniformed, so you know exactly who’s at your door. We work with Owens Corning, Rockwool, Icynene, Johns Manville, CertainTeed, Demilec, Knauf, GreenFiber, and Reflectix, so when a job genuinely calls for a different product, we’ll tell you instead of forcing the brand we happen to have on the truck. Locally owned, published address, license number on the website, and every job backed by the lifetime Done Right Promise. If it’s not done right, we make it right.
FAQs
No. Your Owens Corning product warranty covers manufacturing defects and remains valid regardless of who installs the product, as long as installation follows manufacturer specs. We install to spec, and we document our work. As an independent Owens Corning service provider, we’re not an authorized dealer, and we’ll never claim to be one. But we know these products inside out, and we install them properly. Call (866) 751-4428 if you have a specific warranty question about your home.
In most cases we can schedule a site visit within a few days, and emergency situations call us at (866) 751-4428 any hour. A live person answers. Most wall insulation jobs themselves are completed in a single day, so you won’t be living in a construction zone for a week.
It depends on what we find in your walls. If the cavities have old EcoTouch batts that have slumped, adding to them is usually a half-measure that costs more over time. In many San Antonio homes built before the mid-1990s, the best value is removing the old material and doing a proper drill-and-fill retrofit, because the new fill will outlast what was there and start saving on your energy bill immediately. We’ll give you both numbers and tell you which one we’d choose if it were our house. Free estimates, no pressure.
Yes. Drill-and-fill injection foam goes through small holes drilled from the exterior or interior, then we patch the holes so you can’t tell we were there. It’s the standard approach for finished San Antonio homes where removing drywall would mean repainting entire rooms. The process works well with the tools and materials we’ve used since 2000. Call (866) 751-4428 and we’ll tell you if your wall construction is a good candidate for drill-and-fill based on what we see at the site visit.
We do. If you’re building or adding on in San Antonio, we can spec and install Owens Corning batts, blown-in fiberglass, or foam board during the framing phase before drywall goes up. That’s when insulation is cheapest and easiest to get right. Getting us involved before the walls are closed gives you a tighter envelope and avoids a retrofit down the road.
Get Your Owens Corning Wall Insulation Done Right
The walls in your San Antonio home are working against you all summer and doing you no favors in January either. You don’t need a sales pitch. You need someone who’s been doing this since 2000, knows Owens Corning products and their quirks, shows up when they say they will, and backs every square foot with a lifetime workmanship guarantee. Call (866) 751-4428 for a free estimate. A live person answers, any hour, and you’ll get a straight answer about what your walls actually need.
Written by Walt Brenner, Owner, Walt’s Insulation at Walt’s Insulation, serving San Antonio and nearby areas.