Demilec Spray Foam Insulation in New Braunfels: What to Know First
We provide independent Demilec spray foam insulation in New Braunfels, typically completing most jobs same-day or next-day depending on cavity access and cure time. Most Demilec open-cell and closed-cell jobs in this market run between $1,800 and $4,200 for standard residential applications, with written pricing delivered before any work starts. This page is for homeowners who already have Demilec foam in their walls, attic, or roof deck and need service, repair, or additional coverage. Call (830) 243-6352 for a free estimate with a written scope.
How Demilec Products Fail - and How We Fix Them
- APX 500 open-cell shrinkage in hot roof decks. The APX 500 line is a light-density open-cell foam that can pull away from rafter edges in unvented New Braunfels attics where roof deck temperatures exceed 140°F for sustained periods. We see this most in homes off the River Road corridor and in Canyon Lake-area builds from 2015-2019. Our fix: mechanical reattachment of separated foam, then targeted closed-cell Demilec Heatlok XT at the rafter interface to lock the envelope.
- Heatlok HFO Ultra cold-temperature application failures. This HFO-blown closed-cell series demands substrate temperatures above 40°F at application. Crews working fast through a Hill Country cold snap sometimes miss this, and the foam never achieves full density. We strip the compromised lift and reapply with substrate conditioning, then verify with a core density sample pulled on-site.
- APX 500 moisture retention in rim joists. Open-cell foam in below-grade rim joists acts like a sponge when bulk water is present. In New Braunfels, where caliche soils slow drainage and crawl space humidity runs 70% plus for months, we’ve pulled saturated APX 500 that weighed triple its installed mass. We remove the waterlogged foam, seal the sill plate with Heatlok XT, and install a vapor barrier before any new foam goes in.
- Heatlok XT off-ratio curing from aging equipment. The XT’s higher isocyanate index makes it less forgiving of worn mix chambers or pressure drift. We keep dedicated Demilec-calibrated rigs for this reason, and we check ratio every four hours on the job, not just morning and night. Off-ratio foam cures soft or brittle; we don’t cover it with drywall and hope.
- Demilec pour foam separation in block walls. The older two-component pour foam systems in New Braunfels commercial and multifamily jobs can slump or separate in 8-inch block cavities, leaving thermal bypass channels. We diagnose this with a borescope inspection, then drill and re-pour at corrected lift heights or switch to closed-cell spray application depending on wall condition.
Our Demilec Spray Foam Insulation Process
- 1
Call and scope. A live person answers. We schedule a site visit, not a phone guess. Wes Okafor or a named technician arrives on time with a text en route.
- 2
Blower-door baseline and visual. We run a pressurization test to establish CFM50 before touching anything. Then we borescope cavities, probe foam density, and photograph condition for the Documented Photo Record.
- 3
Written price and parts decision. We specify Demilec OEM replacement foam or, where appropriate, a compatible alternative from our multi-brand inventory including Reflectix systems. The price is flat, the scope is written, the warranty is attached. No work starts without your signature.
- 4
Prep and air seal first. Top plates, can lights, penetrations, and bypasses get sealed before any new foam touches the cavity. We don’t blow over leaks.
- 5
Application and cure verification. Foam goes in at specified temperature and humidity, with ratio checks logged. We verify cure with tack-free time and, on closed-cell jobs, a core sample.
- 6
Post-test and documentation. Blower-door retest prints the improvement. You get the photo record, the pre- and post-CFM50 readings, and the written warranty under our 365-Day Done Right Promise.
Before
AfterWhat Demilec Spray Foam Insulation Costs in New Braunfels
| Job Type | Typical Range | What Moves Price |
|---|---|---|
| Open-cell attic (1,200 sq ft roof deck) | $1,800 - $2,800 | Deck pitch, existing removal, access |
| Closed-cell rim joist (1,500 sq ft home) | $2,200 - $3,400 | Crawl height, moisture damage, vapor barrier need |
| Closed-cell roof deck (1,800 sq ft) | $3,200 - $4,800 | Thickness specified, hot-deck prep, HFO vs legacy blowing agent |
| Demilec removal and replacement | $2,800 - $5,500 | Volume removed, disposal, substrate repair |
These are real ranges from jobs we’ve written in New Braunfels, not bait-and-switch anchors. Every estimate includes a Free Second Opinion on any competing written quote you bring us. Call (830) 243-6352 for your exact number - estimates are free, and the price you sign is the price you pay.
Why New Braunfels Homeowners Call Topside Attic Insulation New Braunfels for Demilec Work
We’re an independent Demilec service provider, not a factory-authorized arm, which means we stock what works rather than what we’re told to push. Our techs know the difference between APX 500 and Heatlok XT application requirements because they’ve pulled failed examples of both from local attics. When Demilec lead times stretch, we can specify compatible alternatives from Owens Corning, Johns Manville, or Reflectix systems without leaving you waiting. The 365-Day Done Right Promise is in writing before anyone starts. Calls are answered live, 24/7, by a person who can schedule, not a voicemail loop with a callback window measured in business days. We’ve sealed and insulated 9,000-plus homes since 2016, and we keep every blower-door test report filed by address. The number on the blower-door printout tells you what the insulation did. Everything else is just talk.
FAQs
No. Demilec’s product warranty covers material defects regardless of who applies it, provided the foam was installed to manufacturer specifications and you have batch documentation. We log batch numbers on every job and include them in your written record. Call (830) 243-6352 if you need help locating yours.
Most Demilec open-cell and closed-cell products are in our New Braunfels warehouse or available within 48 hours from San Antonio distributors. Heatlok HFO Ultra sometimes runs 3-5 days in peak season. We’ll tell you the real lead time when we write your scope, not after you’ve signed.
Spot repairs run 30-50% less than full removal when the failure is localized and the substrate is sound. When shrinkage or moisture damage exceeds 20% of the cavity area, replacement becomes more cost-effective. We price both paths in writing so you can decide with real numbers.
We can match density and R-value; exact color and surface texture vary slightly between lots and cure conditions. For visible applications, we sample your existing foam and spec the closest Demilec product from current production. You’ll see the match point before we proceed.
Yes, for urgent air-leak or moisture-intrusion situations. We stock Heatlok XT and APX 500 for emergency stabilization, with full cure verification on the follow-up visit. Call (830) 243-6352; a live person will pick up.
Written by Wes Okafor, Owner, Topside Attic Insulation New Braunfels at Topside Attic Insulation New Braunfels, serving New Braunfels and nearby areas.