Demilec Home Energy Audit in Schertz: What to Know First
We provide independent Demilec home energy audit in Schertz with same-day or next-day scheduling, and every audit begins with a written price before any work starts. Most Demilec system audits in the Schertz area run between $275 and $495 depending on the scope of testing required. We are not affiliated with or authorized by Demilec; we are an independent Demilec service provider that works on these systems because they show up in local homes built during the 2015-2022 construction boom, particularly in subdivisions like Sedona off FM 1518 and along the Schertz Parkway corridor. If you own a Demilec-insulated home and your energy bills are climbing, rooms won’t hold temperature, or you’re preparing to sell and need documented envelope performance, call (830) 402-5240. A live person answers 24/7.
How Demilec Products Fail - and How We Fix Them
- Demilec Heatlok HFO Pro shrinkage at top plates in vented attics. This closed-cell spray foam can pull back 1/4 to 1/2 inch from framing edges after five to seven years of Schertz’s 140°F summer attic cycling, creating thermal bypasses that blower-door tests catch at 4,000+ CFM50. We cut back the failed bead, reseal with compatible low-expansion foam, and retest.
- Demilec Heatlok XT missed cavity fills in complex rooflines. The 2.0 lb density foam doesn’t always flow to the eave corners in homes with clipped gables or dormers common in newer Schertz builds. Our thermal imaging picks the voids; we spot-fill with matching-density foam rather than blowing fiberglass over the gap, which would hide the problem without fixing it.
- Demilec Sealection 500 open-cell moisture retention in crawl spaces. The 0.5 lb density allows vapor drive in Schertz’s heavy clay soils, especially where groundwater tables shift seasonally. We find saturated foam at the rim joist, remove it, address the moisture source, and specify closed-cell replacement or full encapsulation depending on the reading.
- Demilec Heatlok HFO Pro delamination from OSB roof sheathing. Occurs when the substrate wasn’t properly cleaned or when summer attic heat cycles exceed the adhesive rating. We scrape to bare wood, reprime with manufacturer-compatible cleaner, and reapply - documenting the before-and-after adhesion test in your photo record.
- Demilec Sealection Agribalance settling in wall cavities. The bio-based content can settle 10-15 percent in the first two years if the initial pass was too thin, leaving a gap at the top plate. Our audit includes borescope inspection; we drill and gravity-fill the void rather than tearing drywall.
Our Demilec Home Energy Audit Process

- 1
Call and scheduling. A live person answers, confirms your Demilec product line if you know it, and books a two-hour window. You get a text when your technician is en route.
- 2
Blower-door test first. We depressurize the house to 50 Pascals and record the CFM50 reading - the single number that tells us how much conditioned air your envelope is leaking. This happens before we touch anything.
- 3
Thermal imaging and visual inspection. We map surface temperatures with a FLIR camera and borescope the Demilec foam cavities, looking for shrinkage, voids, delamination, or moisture staining specific to your product line.
- 4
Written scope and price. Under Haven Standard Clause 1, you get a flat price, written scope, and written warranty before anyone lifts a tool. No exceptions.
- 5
Air sealing, then insulation correction. Seal the leaks first. Then insulate. The attic doesn’t care how thick the insulation is if the air is still moving through it. We seal top plates, can lights, and penetrations before adding or correcting any insulation.
- 6
Post-work blower-door test and documentation. We run the pressurization test again, print your before-and-after comparison, and add thermal images and depth-stick photos to your Documented Photo Record. The 365-Day Done Right Promise begins when we leave.
What Demilec Home Energy Audit Costs in Schertz
| Service | Typical Range | What Moves the Price |
|---|---|---|
| Standard Demilec home energy audit (blower door + thermal imaging) | $275 - $375 | Home size, number of HVAC zones, attic accessibility |
| Demilec audit with duct leakage testing | $375 - $495 | Duct accessibility, number of returns, need for register sealing |
| Demilec foam repair after audit (spot fill, top plate reseal) | $180 - $450 | Linear feet of failed bead, cavity access, foam density required |
| Full attic air sealing + insulation correction post-audit | $1,800 - $3,400 | Attic square footage, current insulation depth, extent of bypasses found |
Homes in the Sedona area and along FM 1518 often test at higher initial leakage rates due to vented attic designs with complex rooflines, which can push audit-plus-repair work toward the upper end of these ranges. Every estimate is free, and we offer a Free Second Opinion on any written estimate you’ve already received - bring us the competing quote and we’ll read it with you. Call (830) 402-5240 to schedule.
Why Schertz Homeowners Call Topside Attic Insulation Schertz for Demilec Work

We’ve been working the Schertz corridor for several years now, and we’ve learned that Demilec systems fail in predictable ways once you know what to look for. Wes Okafor built this crew on the sequencing he learned at Richard J. Daley College and refined across two decades in attics: blower-door test first, air-sealing second, insulation third. Every applicable job publishes before-and-after blower-door numbers so you can verify the result yourself. The 365-Day Done Right Promise means if it’s not done right, we make it right - backed by a written scope and written warranty delivered before anyone starts. We also service Reflectix and other major brands, so if your audit reveals that the Demilec product was never the right specification for your application, we can recommend and install the correct material without a second contractor. Calls are answered by a live person 24/7, and our technicians are background-checked, uniformed, and named in your appointment text.
FAQs
No. Demilec’s product warranty covers material defects, not the installation workmanship, and using an independent service provider for audit or repair does not void coverage on the foam itself. We document our findings with photos and written reports that you can submit to Demilec if a material claim is warranted. Call (830) 402-5240 and we’ll walk you through what’s covered versus what isn’t.
We use Demilec OEM foam for repairs where the original specification must be matched exactly, particularly for Heatlok HFO Pro and Heatlok XT density requirements. For certain spot-fill applications, we may specify a compatible third-party foam that meets the same ASTM standards and performs equivalently in Schertz’s climate - we’ll explain the trade-off and price both options in your written scope before you decide.
Spot repairs on isolated shrinkage or voids typically run $180-$450, while full removal and reapplication of a Demilec-insulated attic can exceed $4,000. We only recommend full replacement when the foam is extensively delaminated, moisture-compromised, or was incorrectly specified from the start. Your audit will show which category you’re in, and the written scope will price both paths if both are viable. Estimates are free - call (830) 402-5240.
Same-day or next-day in most cases. We keep blower-door equipment and thermal cameras on every Schertz-area truck, and we don’t outsource diagnostics to a separate crew. If your audit reveals needed repairs, we can often schedule the follow-up within 48 hours. Call (830) 402-5240 - a live person will confirm the next available window.
You receive a printed blower-door report with before-and-after CFM50 readings if repairs were performed, thermal images with temperature annotations, a written scope of any recommended work, and a Documented Photo Record showing access points, problem areas, and completed corrections. This is standard on every job, not available on request. Under Haven Standard, you leave with documentation, not just a receipt.
Written by Wes Okafor, Owner, Topside Attic Insulation Schertz at Topside Attic Insulation Schertz, serving Schertz and nearby areas.