Demilec Wall Insulation in Converse: What to Know First
We provide independent Demilec wall insulation service in Converse, typically completing injection foam and drill-and-fill jobs within one to two days of your call. Most wall insulation projects in Converse homes run between $2,800 and $5,400 depending on wall area, access method, and whether existing material needs removal first. We give you a written price before any work starts, and every job closes with a documented photo record and, where applicable, before-and-after blower-door numbers.
This page is for Converse homeowners who have Demilec products in their walls and need to know whether the material can be supplemented, replaced, or upgraded. Call (830) 420-0953 for a free estimate and a written scope.
How Demilec Products Fail - and How We Fix Them
- Demilec Sealection 500 shrinkage in exterior 2×4 walls. This open-cell foam can pull away from studs over years of Converse heat cycling, creating thermal bypass channels. We diagnose this with infrared imaging, then perform targeted injection foam fill or complete drill-and-fill removal and replacement depending on gap severity.
- Demilec Heatlok HFO High Lift moisture retention in north-facing walls. The higher lift chemistry can trap humidity where exterior drainage planes are compromised, common in Converse’s clay-heavy soils that shift and crack stucco. We pull moisture readings with a pinless meter, remove compromised sections, and reinstall with a vapor-strategy review.
- Demilec Sealection Agribond settling in balloon-framed vintage homes near Foster Road. The bio-based content breaks down faster when original lath-and-plaster walls allow air washing. We remove settled material through exterior drill access, seal top-plate penetrations first, then reinsulate with compatible density foam.
- Demilec Heatlok XT adhesive failure on metal studs in garage conversions. Thermal expansion differential between steel and foam causes delamination. We switch to a hybrid approach: closed-cell contact layer plus mechanical fastening verification, with blower-door confirmation the wall assembly performs as a system.
- Demilec open-cell dusting and air leakage in homes built 2012-2018. Under-applied Sealection 500 in fast-build phases left a friable surface that filters conditioned air into wall cavities. We assess with a smoke pencil and pressure pan, then determine whether topical sealant or full redensity injection is the cost-effective path.
Our Demilec Wall Insulation Process

- 1
Call and scope. A live person answers 24/7. We schedule a site visit, and Wes Okafor or a named technician arrives with an infrared camera and blower-door rig.
- 2
Diagnose and document. We run a blower-door test - pressurizing the house to 50 pascals to measure air leakage in CFM50 - then thermal-scan the walls to locate voids, moisture, or shrinkage. You get photos and a written findings report.
- 3
Written price before any work starts. We specify OEM Demilec product or compatible aftermarket foam based on your existing chemistry, wall assembly, and budget. No work begins without a signed scope and flat price.
- 4
Seal first, then insulate. We air-seal top plates, electrical penetrations, and any bypasses before adding material. “Seal the leaks first. Then insulate. The numbers will tell you if it worked.”
- 5
Install and verify. Injection foam or drill-and-fill is completed, then we run a second blower-door test and provide the printed CFM50 reduction. Most Converse wall jobs show 15-30% envelope improvement.
- 6
Cleanup and record. Holes are patched, siding matched where possible, and you receive a Documented Photo Record plus the 365-Day Done Right Promise in writing.
Before
AfterWhat Demilec Wall Insulation Costs in Converse
Wall insulation pricing depends on access method, wall area, and whether existing Demilec material must be removed first.
| Scenario | Typical Range |
|---|---|
| Supplemental injection foam in partially filled 2×4 walls (per 1,000 sq ft) | $2,800 - $3,900 |
| Drill-and-fill removal and replacement of failed Sealection 500 (per 1,000 sq ft) | $4,100 - $5,400 |
| Interior wall soundproofing with open-cell Demilec (per 1,000 sq ft) | $3,200 - $4,500 |
| Garage conversion metal-stud wall with Heatlok XT (per 1,000 sq ft) | $3,600 - $4,800 |
Factors that move the price: exterior siding type (brick requires different access than Hardie or vinyl), two-story wall height, and the presence of knob-and-tube wiring or balloon framing that demands fire-blocking review. We also work with Reflectix and other brands if your assembly calls for a hybrid solution. Call (830) 420-0953 for a free estimate - we’ll read any competing written quote with you as part of our Free Second Opinion.
Why Converse Homeowners Call Topside Attic Insulation Converse for Demilec Work

We’re an independent Demilec service provider, not a manufacturer affiliate, which means we choose the right material for your wall assembly rather than pushing a product line. Wes Okafor grew up on Chicago’s South Side, trained at Kennedy-King College’s building trades program, and has spent two decades applying that classroom work in Texas attics and walls. His crew knows the Converse housing stock - the ranch-style homes near Foster Road with unsealed top plates, the 2005-2015 builds with fast-foam applications that didn’t cure properly in summer heat.
Every job gets a written price first, a documented record at the end, and blower-door numbers when applicable. The 365-Day Done Right Promise applies to all completed work. Background-checked, uniformed technicians. Live person on the phone, always.
FAQs
No - Demilec’s material warranty covers product defects regardless of who installs it, provided the product was applied to manufacturer specifications. Our work is backed by our own 365-Day Done Right Promise, and we document every step so any future claim has a paper trail. Call (830) 420-0953 if you have a specific warranty concern.
We match the chemistry where possible - Sealection 500 to Sealection 500, Heatlok HFO to Heatlok HFO - but we also evaluate whether the original product was the right choice for your wall assembly. If a different density or closed-cell upgrade makes sense, we’ll explain why in the written scope before you decide. Call for a free assessment.
Spot injection into isolated voids runs $2,800-$3,900 per 1,000 square feet, while full removal and replacement runs $4,100-$5,400. If the failure is widespread shrinkage or moisture degradation across multiple walls, replacement is usually more cost-effective than chasing individual gaps. We give you both options in writing. Call (830) 420-0953 for an exact quote - estimates are free.
Most jobs are scheduled within three to five business days, with emergency heat-loss situations handled faster. We don’t do callback windows - you get a named technician and a text when they’re on the way, under Haven Standard: Arrive on schedule. Call to check current availability.
You get a Documented Photo Record of all access points, material application, and patched finishes; a written invoice matching your pre-work price; and on applicable jobs, printed before-and-after blower-door readings showing your CFM50 reduction. Everything is delivered before the crew leaves. Call (830) 420-0953 to schedule.
Written by Wes Okafor, Owner & Lead Insulation Technician, Topside Attic Insulation Converse at Topside Attic Insulation Converse, serving Converse and nearby areas.