Demilec Spray Foam Insulation in Converse: What to Know First
We provide independent Demilec spray foam insulation service in Converse, TX, with most jobs scheduled within 48 hours and completed in a single day. Our written price before any work starts runs between $2,800 and $6,400 for typical residential Demilec open-cell or closed-cell applications, depending on the assembly and square footage. We do not guess at pricing over the phone; we inspect, measure, and deliver a flat written scope with the price attached.
This page is for Converse homeowners who already have Demilec foam in their walls, roof deck, or rim joists and need repair, replacement, or new installation. That includes the older ranch-style homes near Foster Road where Demilec Heatlok HFO Pro closed-cell was spec’d in the 2015-2019 building boom, and newer builds in Woodlake where Demilec Sealection 500 open-cell went in during the 2021-2023 surge. If your foam is pulling away from studs, yellowing, or no longer performing, call (830) 420-0953. A live person answers, 24/7.
How Demilec Products Fail - and How We Fix Them
- Heatlok HFO Pro closed-cell shrinkage at stud faces. Demilec’s HFO-blown closed-cell line can pull 3-8% during cure in Converse’s low-humidity winter months, leaving visible gaps at framing edges. We cut back the separated foam to sound substrate, prime with Demilec-compatible adhesive, and re-shoot to full thickness rather than caulking over the void. The fix is documented with before-and-after photos and a thermal-scan verification.
- Sealection 500 open-cell overspray into soffit vents. This low-density open-cell foam expands aggressively; in Converse’s tight attic assemblies, installers sometimes miss the baffle gap and clog intake ventilation. We remove the blocked foam with a specialized hot-wire cutter, reinstall proper cardboard or foam baffles, and re-apply Sealection 500 with masking corrected. The homeowner gets photos of the cleared vent path.
- Demilec 500 closed-cell delamination from OSB roof decking. When roof decks hit 140°F+ in July and August, the interface between Demilec 500 and oriented strand board can release if the substrate wasn’t properly conditioned or if a single-pass application exceeded lift thickness. We scrape to bare deck, apply a moisture-conditioned primer coat, and rebuild in 1-inch lifts to spec density. Our crew logs substrate temperature and humidity at each pass.
- Heatlok XT spray adhesive failure on rim joists. In crawl spaces with seasonal groundwater fluctuation, Demilec’s XT formulation can lose bond where the sill plate meets the foundation. We diagnose with a hammer-tap survey and infrared, remove the failed section, treat the concrete with a silane-based moisture barrier, and re-apply Heatlok XT to a dried, brushed substrate. The work includes a 365-Day Done Right Promise on adhesion.
- Aging Demilec foam yellowing and odor recurrence. Pre-2018 Demilec formulations using older amine catalysts can off-gas trace odors when attic temperatures spike above 120°F, common in Converse’s unvented cathedral ceilings. We do not paint over this. We remove the degraded foam, ventilate the cavity to below 40% relative humidity, and reinstall with current Demilec low-VOC chemistry. The homeowner receives the batch number and cure-time documentation.
Our Demilec Spray Foam Insulation Process
- 1
Call and schedule. A live person answers at (830) 420-0953, 24/7. We book a site visit in Converse within 24-48 hours. No deposit required to hold the slot.
- 2
On-site inspection and blower-door test. We pressurize the house to 50 pascals and record CFM50 leakage - the single number that tells us how much conditioned air the envelope is losing before we touch anything. For Demilec jobs, we also probe foam adhesion with a blunt awl and photograph any shrinkage, delamination, or thermal bridging with infrared.
- 3
Written price and scope. Under Haven Standard Clause 1, you get a flat price, written scope, and written warranty before anyone lifts a tool. For Demilec repairs, we specify whether we’re using OEM Demilec material or a compatible aftermarket equivalent, and why.
- 4
Air sealing first, then foam. We seal top plates, can lights, and penetrations before adding or replacing any insulation. Seal the leaks first. Then insulate. The numbers will tell you if it worked.
- 5
Application and documentation. The crew applies Demilec foam to specified thickness and density, photographing each stage. On applicable jobs, we run a second blower-door test and print the before-and-after comparison.
- 6
Cleanup and record delivery. You receive a Documented Photo Record, the blower-door report if measured, and the written warranty. Payment is due only after you review and sign off on the completed scope.
Before
AfterWhat Demilec Spray Foam Insulation Costs in Converse
| Job Type | Typical Range | What Moves the Price |
|---|---|---|
| Demilec open-cell wall cavity (1,800 sq ft home) | $2,800 - $4,200 | Cavity depth, stud spacing, existing removal required |
| Demilec closed-cell roof deck (2,000 sq ft attic) | $4,500 - $6,400 | Deck condition, lift count, substrate prep needed |
| Rim joist spray foam (typical crawl space) | $1,800 - $3,200 | Linear feet, access difficulty, moisture remediation |
| Demilec repair / spot remediation | $650 - $1,800 | Area affected, foam type match, ventilation correction |
These are real numbers for Converse homes we’ve measured in the last 18 months. A 1950s ranch near FM 78 with balloon framing and no existing air sealing will run higher than a 2019 build with sealed top plates already in place. We also source Reflectix and other brands when the assembly calls for a hybrid approach. Every estimate is free, written, and delivered before any work starts. Call (830) 420-0953 for an exact quote on your Demilec job.
Why Converse Homeowners Call Topside Attic Insulation Converse for Demilec Work
We’ve sealed and insulated over 9,000 homes since 2016, and a growing share in Converse involves Demilec foam installed during the 2015-2023 building wave that’s now showing its first failure modes. Wes Okafor, our owner and lead technician, trained in building trades at Kennedy-King College before two decades in Texas attics. He knows the difference between Heatlok HFO Pro shrinkage and installation error, and he documents the distinction with photos and blower-door numbers rather than opinions.
Our 365-Day Done Right Promise applies to every Demilec job. Our technicians are background-checked and uniformed. Calls are answered by a live person, 24/7, not a callback queue. And if you have a written estimate from another contractor, we provide a free second opinion - we’ll read it with you line by line.
FAQs
No - Demilec’s product warranty covers material defects, not installation or subsequent repair work by an independent service provider. As an independent Demilec service provider, we document the existing foam condition with photos and batch numbers where visible, so any legitimate material claim remains traceable. Our repair work carries its own 365-Day Done Right Promise. Call (830) 420-0953 if you need help locating your original install documentation.
Yes, we match Demilec density and closed-cell or open-cell type to the existing assembly. For Heatlok and Sealection lines, we can source current-formulation OEM material or a compatible aftermarket equivalent with equivalent R-value and vapor permeance. We specify which we’re using in your written scope before application starts. Free estimates include a density-test probe of the existing foam.
Spot repair is usually 40-60% less than full removal and replacement, but only when the failure is localized and the surrounding foam tests sound for adhesion and density. If we find systemic shrinkage, moisture intrusion, or pre-2018 formulation degradation, full replacement is the honest recommendation. We explain the test results and show you the infrared images before you decide. Call (830) 420-0953 for a free inspection.
Most Demilec repairs are scheduled within 48 hours and completed in one day. Rim joist and small wall-cavity jobs often finish in 4-6 hours. Roof deck or full-attic work may take two days due to lift-cure times between passes. We do not rush cure chemistry. Your written scope includes the day count before work starts.
We service all major spray foam brands, including Demilec, Icynene, and others. We also install and repair Reflectix radiant barrier systems when the assembly calls for a hybrid approach. No proprietary lock-in means we recommend what the house needs, not what a manufacturer requires us to sell. Every recommendation is in your written scope with the reasoning attached.
Ready to get your Demilec foam inspected, repaired, or replaced? Call (830) 420-0953 now. A live person will answer, schedule your free estimate in Converse, and you’ll have a written price before any work starts - guaranteed under Haven Standard Clause 1.
Written by Wes Okafor, Owner & Lead Insulation Technician, Topside Attic Insulation Converse at Topside Attic Insulation Converse, serving Converse and nearby areas.