GreenFiber Home Energy Audit Nationwide | Walt’s Insulation

GreenFiber Home Energy Audit in San Antonio: What to Know First

GreenFiber home energy audits in San Antonio typically cost $199 to $449, depending on how deep you go with thermal imaging and duct leakage testing, and most inspections take 2 to 4 hours. We’re an independent GreenFiber service provider, not a factory rep, which means we tell you what’s actually going on in your attic and walls without a sales script behind it. If you own a home with GreenFiber cellulose insulation and your energy bills have crept up, this page covers what we look for, what it costs, and when to call us at (866) 751-4428.

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How GreenFiber Products Fail - and How We Fix Them

GreenFiber makes good insulation. That said, we’ve been inside enough San Antonio attics since 2000 to know exactly where things go wrong, especially in our climate. Here are the five most common issues we find during GreenFiber home energy audits:

• GreenFiber SANCTUARY settles and thins out over exterior top plates. SANCTUARY is their dense-pack wall product, and in San Antonio’s older pier-and-beam homes we see it slump in wall cavities where humidity got to it during construction. The symptom is a bedroom that’s always ten degrees warmer than the hallway. The fix is drilling a small inspection hole, confirming the void with a borescope, and dense-packing the cavity again.
• GreenFiber Insulation blown into attics gets wind-washed near soffit vents. This is the one nobody tells you about. In San Antonio, our prevailing southeast winds hit eave vents and push loose-fill GreenFiber back from the roof deck edge, leaving a bare strip right where attic air leaks in. During a thermal imaging inspection, we see cool streaks along exterior walls from March through October. The fix is adding baffles and topping off those areas to R-38 or better.
• Rodents tunnel through GreenFiber Insulation and destroy its R-value. GreenFiber’s borate treatment deters some pests, but roof rats in Alamo Heights and Terrell Hills will still burrow through it. We find nests the size of footballs. The audit includes checking for rodent entry points because no amount of new insulation fixes a rat highway. We do attic cleaning and rodent proofing before adding material back.
• GreenFiber Insulation loses loft when it gets damp from HVAC condensate leaks. GreenFiber is recycled paper fiber, and San Antonio humidity gives us sweating ducts in attics. A slow drip onto loose-fill cellulose compresses it into a mat that measures closer to R-19 than the R-38 you paid for. Our blower door test often picks up the airflow path, then we trace the moisture. You fix the condensate issue first, then fluff or replace the insulation.
• Duct leakage undoes what GreenFiber was supposed to do. We run a duct leakage test on nearly every GreenFiber audit because San Antonio homes lose 20 to 30 percent of conditioned air through leaky flex ducts. The homeowner blames the insulation, but the real problem is air moving through gaps in the ductwork. We measure it with a duct blaster, then seal the leaks with mastic, not tape.

Our GreenFiber Home Energy Audit Process

When you call, a live person answers. No voicemail tree, no answering service. Here’s what happens next:

1. 1
   We schedule the visit and confirm the scope. You tell us what’s bugging you: a hot room, a draft, a $400 August electric bill. We tell you upfront what testing makes sense.
2. 2
   We walk the house with you. Before any equipment comes out, we look at the attic access, the vents, the return air paths. You’d be surprised what a visual check turns up.
3. 3
   We run the blower door test. This depressurizes the house and shows us exactly where outside air is sneaking in. GreenFiber insulation can’t do its job if air is moving through the building envelope.
4. 4
   We scan with a thermal imaging camera. Walls, ceilings, floors. The camera shows temperature differences that point to missing insulation, air leaks, or moisture behind drywall.
5. 5
   We test duct leakage if your ducts run through the attic. This is standard for us because it’s the number one energy waster in San Antonio homes built before 2010.
6. 6
   We sit down with you and go over the findings. You get numbers, photos, and a straight recommendation. If you want the work done, we give you a written estimate before any tools get picked up.

Everything we do is covered by the Done Right Promise. If we fix something and it’s not done right, we come back and make it right. No runaround, no fighting over what “warranty” means.

What GreenFiber Home Energy Audit Costs in San Antonio

Here’s what you’re looking at for a GreenFiber home energy audit in San Antonio:

• Visual insulation inspection: $199 to $299. We go into the attic, measure depth and coverage, check for settling, moisture, and rodent damage. This is the baseline audit most homeowners start with.
• Blower door test: $249 to $349 as part of a full audit. This is the only way to actually measure air leakage. Guessing at it is a waste of your money.
• Thermal imaging inspection: $299 to $449 for a full-house scan. This catches the problems you can’t see from the attic access hatch.
• Duct leakage test: $199 to $299. We pressurize the ducts and measure exactly how much air you’re losing to the attic.
• Full energy audit package (blower door + thermal imaging + duct test): $449 to $599. This is what we recommend for homes over 20 years old or anyone with rooms that won’t hold temperature.

What moves the price: house size, number of attic accesses, how old the ductwork is, and whether we need to pull old insulation to see what’s underneath. We charge no trip charge inside Bexar County, and if you have a written estimate from anyone else, we’ll give you a free second opinion on it. Seniors and veterans always get 10 percent off. Call (866) 751-4428 for an exact quote.

Why San Antonio Homeowners Call Walt’s Insulation for GreenFiber Work

Walt’s Insulation is the one down the road. We’ve been locally owned and owner-operated since 2000, with a published address and a license number you can actually look up. When you call about GreenFiber insulation, the person who answers the phone works here, not in a call center three states away. Walt Brenner grew up on the north side near Brackenridge Park, learned the trade at San Antonio College, and has been fixing South Texas attics long enough to know that July heat punishes sloppy insulation work. Our techs are background-checked and uniformed, and they know GreenFiber, Owens Corning, Rockwool, Johns Manville, Knauf, CertainTeed, Icynene, and Demilec. If GreenFiber isn’t the right call for your situation, we’ll tell you. Sometimes we recommend Reflectix radiant barrier as a supplement instead of replacing what you already have. The point is, we’re not married to one brand. We’re married to doing the job right.

Frequently Asked Questions