Demilec Wall Insulation Nationwide

Demilec Wall Insulation in New Braunfels: What to Know First

We provide independent Demilec wall insulation service in New Braunfels, typically completing drill-and-fill or injection foam jobs in one day with a written price locked before any work starts. Most Demilec wall insulation projects in this market run between $2,800 and $5,400 depending on wall cavity depth, existing condition, and whether the original foam has degraded or separated from the studs. This page is for homeowners who know they’ve got Demilec in their walls and need to know whether it can be repaired, topped off, or fully replaced without guessing at the cost. Call (830) 243-6352 for a free estimate with a written scope and warranty delivered before we lift a tool.

Call (830) 243-6352

How Demilec Products Fail - and How We Fix Them

• Demilec Heatlok Soya HFO shrinkage in older New Braunfels builds. The bio-based content in early Heatlok Soya batches reacted to Central Texas heat cycling by pulling away from stud bays, creating thermal bypass channels we can see with a FLIR camera. We remove the compromised foam through drilled access holes, then inject fresh Demilec Heatlok XT or an equivalent closed-cell product at 2.0 lbs density to restore the R-13 to R-15 per inch the wall was designed for.
• Demilec Sealection 500 off-gassing and odor retention in interior soundproofing walls. Sealection 500’s open-cell structure can trap humidity in New Braunfels homes where interior walls back against poorly ventilated chase spaces, producing a persistent chemical smell years after install. We ventilate the cavity, remove degraded material, and replace with a low-VOC closed-cell alternative or mineral wool batts depending on the soundproofing priority.
• Demilec 500 open-cell water absorption in River Road corridor homes. Near the Guadalupe, slab-on-grade construction with no basement creates a stack effect that drives ground moisture into bottom wall plates; open-cell Demilec 500 absorbs that moisture and loses R-value. We cut at the plate level, install a vapor barrier, then switch to closed-cell foam or dense-pack cellulose for the repair zone.
• Demilec Heatlok XT improper mix-ratio failures from original install. When the A and B components weren’t balanced correctly, Heatlok XT cures brittle and crumbles under stud compression or seasonal movement. We test core samples from drilled holes to confirm density, then extract and re-pour at the specified 2.5 lbs per cubic foot with fresh substrate prep.
• Demilec Agribalance settling in 2×4 exterior walls with inadequate fill. Agribalance’s lighter density sometimes settled 6 to 8 inches below top plates in walls framed before 2018, leaving a convective air loop that reads hot on thermal imaging. We drill at plate height, probe for voids, and top-fill with matching material or switch to a higher-yield product if the cavity geometry allows.

Our Demilec Wall Insulation Process

1. 1
   Call and scope. A live person answers, schedules a site visit, and sends a text with your technician’s name and ETA.
2. 2
   Diagnostics and blower-door baseline. We run a blower-door test - a pressurization reading that shows, in one number, how much conditioned air your building envelope is losing - plus thermal imaging to locate voids, shrinkage, or moisture damage in the Demilec.
3. 3
   Written price and material spec. You get a flat price, written scope, and written warranty before anyone lifts a tool. We specify OEM Demilec or quality aftermarket based on cavity condition, not inventory pressure.
4. 4
   Prep and air sealing. Top plates, electrical penetrations, and plumbing chases are sealed first. We don’t blow or inject over an unsealed cavity.
5. 5
   Injection or drill-and-fill. Access holes are drilled at stud bay intervals, existing foam is extracted or conditioned as needed, and new material is injected to full density with real-time monitoring.
6. 6
   Post-test and documentation. We run the blower-door again, print your before-and-after CFM50 readings, and deliver a Documented Photo Record with every access point, every thermal image, and both test results filed by your address.

Before

After

What Demilec Wall Insulation Costs in New Braunfels

Price moves with cavity depth (2×4 vs. 2×6), whether we can reuse access holes or must open drywall, and whether the original foam requires full extraction or spot repair. We don’t estimate over the phone for Demilec work; the cavity condition varies too much. Call (830) 243-6352 for a free estimate with a written price before any work starts.

Why New Braunfels Homeowners Call Topside Attic Insulation New Braunfels for Demilec Work

We’ve sealed and insulated 9,000+ homes since 2016, and a growing share of our New Braunfels wall jobs involve correcting or upgrading existing Demilec installs. Wes Okafor and our crew have worked neighborhoods throughout the area, including the River Road corridor near the Guadalupe, where stack-effect air leakage in older slab homes tends to run higher than homeowners expect. We also carry Reflectix and other brands, so if your Demilec system isn’t salvageable, we won’t force a Demilec solution that doesn’t fit. Every job closes with a 365-Day Done Right Promise, printed blower-door numbers, and a photo record you can hand to a buyer’s inspector. The number on the blower-door printout tells you what the insulation did. Everything else is just talk.

FAQs