Demilec Home Energy Audit Nationwide | Walt’s Insulation

Demilec Home Energy Audit in Fullerton: What to Know First

A Demilec home energy audit in Fullerton typically runs $199-$495 depending on home size and how deep the testing goes, and we can usually get a technician to your door within two to three business days. We’re an independent Demilec service provider, which means we inspect and diagnose what’s actually happening inside your walls and attic: no manufacturer talking points, no scare tactics, just test results and a straight answer about what needs fixing. If you own a home in Fullerton with Demilec spray foam and your energy bills have been creeping up, or rooms feel uneven, this page is for you. Call (657) 216-9948 and a live person picks up, any hour.

Call (657) 216-9948

How Demilec Products Fail - and How We Fix Them

Demilec makes solid foam products, but nothing is perfect, and Fullerton’s climate finds every weakness. Here’s what we see on home energy audits, and what it actually means.

• Heatlok HFO shrinkage at the rim joist. In older Fullerton ranch-style homes near the Arboretum, we routinely find Heatlok HFO pulling away from rim joists by a quarter inch or more. It looks fine until a blower door test shows air moving behind the foam. The fix is usually targeted air sealing at the gap, not a full re-spray.
• Sealection 500 open-cell saturation in crawl spaces. Open-cell foam absorbs moisture. In Fullerton homes with high groundwater or poor drainage, we find Sealection 500 holding water against floor joists. A thermal imaging inspection shows cold, wet bands. We recommend drying and, in many cases, removal and replacement with closed-cell or a vapor barrier strategy that actually works with the house.
• Heatlok Soy 200 off-ratio application. When installers run a Demilec rig too cold or push the ratio out of spec, the foam never fully cures. We’ve found Heatlok Soy 200 that’s still tacky years later, off-gassing and underperforming. Our audit includes foam hardness and adhesion checks in visible areas, and an honest assessment of whether it’s a patch job or a tear-out.
• Attic bypasses the foam never touched. This is the big one. A Demilec install can be done correctly at the roofline while the top plates, can lights, and plumbing chases remain wide open. Our blower door test combined with a thermal camera finds these bypasses in about twenty minutes. The fix is air sealing, not more foam, and it’s usually under $400.
• Demilec APX 2.0 and UV degradation in vented attics. Closed-cell foam exposed to sunlight breaks down, period. In Fullerton attics with gable vents or patched roofing, we see APX 2.0 turning amber and brittle. An energy audit catches this early, before the foam loses its sealing edge and you’re paying to re-spray half the roofline.

Our Demilec Home Energy Audit Process

Here’s how a Demilec home energy audit works when you call us in Fullerton.

1. 1
   Call and talk to a person. You reach Walt or one of our techs directly, 24/7. We ask a few questions: square footage, when the Demilec foam was installed, what rooms feel off. Then we book a time that works, often within 48 hours.
2. 2
   Walkthrough and visual inspection. A background-checked, uniformed technician walks the home with you, inside and out, looking at the attic, crawl space, and any visible foam. We’re checking for the failure modes above and anything unusual.
3. 3
   Diagnostic testing. We set up the blower door and run the house at negative pressure. Then we sweep with a thermal imaging camera. This combination pinpoints exactly where air and heat are moving, whether it’s Demilec shrinkage, bypasses, or duct leakage hiding in a chase.
4. 4
   Duct leakage test where needed. If your ducts run through unconditioned space, we test them. Duct leakage in Fullerton homes often accounts for 15-25% of cooling loss, and it’s fixable with mastic and tape, not a new system.
5. 5
   Honest findings and a written quote. We sit down with you and explain what we found, what it’s costing you, and what we’d fix first. We use OEM-equivalent materials when it matters and quality aftermarket alternatives when they’re genuinely equal. No upsells.
6. 6
   The work and the Done Right Promise. If you hire us, we do the job, test again to confirm, and leave the site clean. Every job is covered by our lifetime workmanship guarantee. If it’s not done right, we make it right. No runaround.

What Demilec Home Energy Audit Costs in Fullerton

Here are the price ranges we quote most often in Fullerton, based on what we find during a Demilec home energy audit.

What moves the price is home size, how accessible your attic and crawl space are, and whether we’re testing ducts. Bigger homes take longer and need more camera time. If you have a written estimate from another Fullerton company, bring it in and we’ll give you a free second opinion. Estimates are free, and there’s no trip charge inside our service county. Call (657) 216-9948 for an exact quote.

Why Fullerton Homeowners Call Walt’s Insulation for Demilec Work

We’ve been locally owned and owner-operated since 2000. Walt Brenner built this company on the idea that the person answering the phone should be the same person who stands behind the work, and that’s still how we run it. We’re not a franchise. We have a published address and a license number you can look up. When you call about your Demilec foam at midnight because something doesn’t feel right, a live person answers. No voicemail, no answering service.

Our technicians are background-checked and show up in uniform, so you know exactly who’s walking into your home. We work on Demilec products every month in Fullerton, and we also service other brands including Reflectix, so we’re not guessing when we diagnose your house. Every job carries the Done Right Promise: a lifetime workmanship guarantee. We do the job right the first time - because we’re the ones who have to stand behind it. Seniors and veterans always get 10% off. And any repair over $200 gets $40 off. That’s just how we operate.

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