Demilec Wall Insulation Nationwide

Demilec Wall Insulation in Schertz: What to Know First

We provide independent Demilec wall insulation service in Schertz, including injection foam retrofits and drill-and-fill exterior wall work, with most jobs scheduled within 3-5 business days and completed in a single day. Every job starts with a written price before any work starts, and we publish before-and-after blower-door numbers so you can verify the performance change. If you own a Demilec-insulated home in Schertz and your walls are underperforming, settling, or were never properly sealed to begin with, call (830) 402-5240 for a free estimate and a documented inspection.

Call (830) 402-5240

How Demilec Products Fail - and How We Fix Them

• Heatlok HFO High Lift shrinkage in stud cavities. The HFO blowing agent in newer Heatlok formulations can contract 8-15% during cure in Schertz’s combination of high summer humidity and rapid attic heat cycling. We find this most often in two-story homes near the Cibolo Creek watershed where overnight cooling doesn’t fully stabilize the cavity temperature. Our fix: we probe the cavity with a borescope, map the voids, then inject Demilec-approved refill foam or switch to a compatible open-cell top-up that bonds to the original substrate without delamination.
• Demilec 500 wall separation at the top plate. In homes built 2012-2018, the 500-series closed-cell foam sometimes pulls away from the top plate as the framing dries and shrinks in Schertz’s hard-clay soil conditions. The gap is usually 1/4 to 1/2 inch, invisible from the interior, and it destroys the air barrier the foam was supposed to create. We seal the gap with acoustic sealant backed by expanding foam, then verify with a smoke pencil during blower-door depressurization.
• Sealection 500 density loss in soundproofing applications. Demilec’s Sealection 500 was marketed heavily for interior wall sound dampening, but we’ve found it degrades to a chalky consistency when subjected to repeated plumbing leaks in shared bathroom walls. The foam loses its acoustic mass and its thermal value simultaneously. We remove the degraded material with controlled extraction, dry the cavity with targeted airflow, and reinstall with a moisture-resistant alternative from our multi-brand inventory.
• Demilec Agribalance off-gassing in retrofit injections. Agribalance, Demilec’s soy-based open-cell line, can emit a persistent amine odor when injected into existing walls that weren’t designed for spray foam off-gassing cycles. Schertz’s tight building envelopes in newer subdivisions like Sedona trap these VOCs longer than the product’s published dissipation curve suggests. We ventilate cavities with temporary exhaust ports during cure, then validate air quality with a photoionization detector before we close the walls.
• Improper original installation depth in 2×4 exterior walls. Demilec’s own published R-values assume full 3.5-inch cavity fill, but we’ve documented numerous Schertz jobs where the original installer stopped at 2.5 inches to save material, leaving the homeowner with R-13 performance in a wall spec’d for R-19. We don’t guess at this: we drill test ports and measure actual depth with a calibrated probe before writing any scope of work.

Our Demilec Wall Insulation Process

1. 1
   Initial inspection and blower-door test. We pressurize the house to measure baseline air leakage in CFM50, then use thermal imaging to locate wall cavities with missing, settled, or degraded Demilec foam.
2. 2
   Borescope cavity mapping. We drill discrete 1/2-inch inspection ports and feed a camera to document exactly what’s inside each cavity, whether it’s voids, delamination, moisture staining, or proper fill. You get these photos.
3. 3
   Written scope and price. Under Haven Standard Clause 1, we deliver a flat price, written warranty, and detailed scope before anyone lifts a tool. No work starts without your signature on that document.
4. 4
   Air sealing before any new insulation. We seal the leaks first. Then we insulate. The attic doesn’t care how thick the insulation is if the air is still moving through it. Top plates, electrical penetrations, and plumbing chases get sealed with acoustic sealant and expanding foam.
5. 5
   Demilec-compatible injection or removal and replacement. For localized voids, we inject matching-density foam. For widespread degradation, we extract the failed material and install new insulation, which may be Demilec, Reflectix, or another brand from our inventory depending on your wall assembly and budget.
6. 6
   Post-work blower-door test and documentation. We run the pressurization test again, print the before-and-after comparison, and add thermal images plus depth-stick photos to your Documented Photo Record. The 365-Day Done Right Promise begins when you sign the completion sheet.

What Demilec Wall Insulation Costs in Schertz

Most Demilec wall insulation jobs in Schertz fall into these ranges based on what we actually encounter:

• Injection foam retrofit for localized voids: $1,800-$3,400 for a typical 1,800-2,400 sq ft home with 8-12 accessible cavities
• Drill-and-fill exterior wall restoration (full remediation): $4,200-$7,800 including extraction of degraded foam, air sealing, and new fill
• Interior wall soundproofing replacement: $2,400-$4,600 for shared walls in townhomes or duplexes near FM 3009
• Blower-door test with thermal imaging only: $280-$420 (credited toward any work we perform)

Price movers: cavity count, whether we need to remove degraded material, accessibility of top plates for air sealing, and whether the original Demilec installation included a proper ignition barrier. We don’t estimate over the phone for wall work, but we do guarantee your written price won’t change once you approve the scope. Call (830) 402-5240 for a free estimate, estimates are free.

Why Schertz Homeowners Call Topside Attic Insulation Schertz for Demilec Work

We’ve been working the Schertz corridor for several years now, including jobs in the Sedona subdivision off FM 1518 where summer attic temps regularly push past 140°F before a single batt goes in. Wes Okafor built this operation on sequencing the work correctly: blower-door test first, air-sealing second, insulation third. Our crew knows the difference between Heatlok HFO and Agribalance cure profiles, and we carry Reflectix and other brands so we’re never locked into a single manufacturer’s solution when your wall assembly needs something different. Every job closes with a printed thermal-imaging summary, post-install depth-stick photos, and the 365-Day Done Right Promise in writing. Calls are answered by a live person, 24/7.

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