Demilec Blown-In Insulation in Schertz: What to Know First
We provide independent Demilec blown-in insulation service in Schertz, typically completing attic jobs in one day with a written price delivered before any work starts. Most Demilec blown-in cellulose and fiberglass top-ups in the Schertz corridor run between $1,800 and $3,400 depending on attic square footage, existing depth, and whether the air sealing has been addressed first. Call (830) 402-5240 for a free estimate with a written scope and flat price - no work begins without both.
This page is for homeowners who have Demilec insulation products in their attic or walls and need service, top-up, or replacement. You might be in a 2015-2020 build in the Sedona subdivision off FM 1518 where Demilec blown-in cellulose was spec’d originally, or you’re seeing settling, moisture staining, or performance drop-off and want to know whether the fix is additive or full replacement. We work on Demilec systems as an independent Demilec service provider - not authorized or affiliated with the manufacturer - which means we source parts and materials based on what solves the problem, not what a brand catalog limits us to.
How Demilec Products Fail - and How We Fix Them
- Demilec Heatlok Soya HFO settling in vented Schertz attics. The open-cell spray foam component in hybrid systems can shrink 15-20% over five to seven years in our climate, where summer attic temperatures exceed 140°F and winter humidity swings stress the material. We find the gap, measure the actual R-value loss with a thermal camera, then dense-pack Demilec blown-in cellulose to restore the thermal boundary without tearing out the original foam.
- Demilec Sealection 500 overspray bridging into soffits. When this medium-density closed-cell foam was applied too thick near eaves in older Schertz installs, it blocks the ventilation path and traps moisture against roof decking. Our fix: surgical removal of the bridged foam, restoration of the soffit baffle airway, then blown-in fiberglass to the correct depth with a vent chute installed where the original was compromised.
- Demilec Eco-Pur reaction with galvanized ductwork in attics. The isocyanate chemistry in some Eco-Pur batches corrodes galvanized metal when applied directly; we’ve found this in three Schertz homes built 2017-2019. We remove the contaminated foam, treat the metal, then switch to Demilec blown-in cellulose for the thermal layer - no chemical contact with the ductwork.
- Demilec Agribalance degradation from rodent activity. The corn-based content in Agribalance makes it attractive to pests once the vapor barrier is breached. We remove the soiled material, rodent-proof the attic with steel mesh at all penetrations, then reinstall with Demilec blown-in fiberglass - less palatable to wildlife and better suited to Schertz’s extended warm season.
- Demilec Polarfoam 7300 off-gassing in conditioned attics. In sealed attic assemblies where this high-R closed-cell foam was used, incomplete curing can produce odor issues for months. We test with a photoionization detector, ventilate if readings are elevated, and when re-insulation is needed, we use Demilec blown-in systems that don’t require chemical reaction in place.
Our Demilec Blown-In Insulation Process
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Call and scheduling. A live person answers 24/7. We book a site visit, and you’ll get a text when Wes Okafor or your assigned technician is en route - Haven Standard: Arrive on schedule, named technician, no surprises.
- 2
Pre-work inspection and blower-door test. We pressurize the house to measure CFM50 - the single number that tells us how much conditioned air you’re losing. In Schertz, we regularly see readings above 3,500 CFM50 in homes with Demilec insulation that was installed without proper air sealing of top plates and can lights.
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Air sealing before any insulation touches the attic. Seal the leaks first. Then insulate. The attic doesn’t care how thick the insulation is if the air is still moving through it. We seal top plates, electrical penetrations, can light housings, and duct boots with fire-rated caulk and rigid foam.
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Material selection and written price. We specify Demilec blown-in cellulose, blown-in fiberglass, or dense-pack wall insulation based on the application - not based on what we have excess inventory of. You get a written price, written scope, and written warranty before anyone lifts a tool. Haven Standard Clause 1.
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Installation with depth verification. The crew installs to the specified weight per square foot (cellulose) or coverage chart (fiberglass), with depth-stick photos taken every 200 square feet. These go into your Documented Photo Record.
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Post-work blower-door test and documentation. We run the pressurization test again, print the before-and-after comparison, and add thermal imaging if temperature differentials warrant it. You leave with the numbers, the photos, and the 365-Day Done Right Promise in writing.
What Demilec Blown-In Insulation Costs in Schertz
Most attic top-ups with Demilec blown-in cellulose in a 1,800-2,400 square foot Schertz home run $1,800-$2,800. Full replacement of settled or contaminated Demilec material, including removal, air sealing, and reinstall, typically falls between $2,800 and $4,600. Dense-pack wall insulation with Demilec blown-in fiberglass in a standard three-bedroom ranch runs $2,200-$3,400.
Three factors move the price: attic accessibility (scuttle vs. pull-down stairs vs. no access at all), the condition of existing material (top-up over clean insulation vs. removal of soiled or degraded product), and whether the air sealing was done originally or we’re starting from zero. We also service Reflectix radiant barrier systems when they’re part of the assembly, though that’s priced separately.
Every estimate is free, every price is written, and every job includes the Documented Photo Record. Call (830) 402-5240 - we’ll read any competing written estimate with you as part of our Free Second Opinion.
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, blown-in insulation third. That sequence matters more with Demilec products than with some other brands because several Demilec lines are moisture-sensitive or chemically reactive with other building materials - putting them in over an unsealed envelope accelerates their failure modes.
Our 365-Day Done Right Promise applies to every completed job. Our materials come from Owens Corning, Johns Manville, Knauf, Rockwool, CertainTeed, Icynene, Demilec, and GreenFiber - no proprietary lock-in means we specify what performs, not what we’re obligated to sell. Background-checked, uniformed technicians. Calls answered by a live person, 24/7. And the before-and-after blower-door numbers are published on every applicable job so you can verify the result yourself.
FAQs
No - Demilec’s product warranty covers material defects regardless of who installs or services it, provided the original application met manufacturer specifications. As an independent Demilec service provider, we document our work with photos and written scope so any future warranty claim has supporting evidence. If you’re unsure about your original install’s compliance, we can assess that during our free estimate and note any concerns in writing. Call (830) 402-5240 to schedule.
Demilec blown-in cellulose and fiberglass are rated for the life of the structure when installed correctly, but our climate accelerates failure in three specific ways: unsealed air movement carries moisture into the attic during humid months, summer attic temperatures above 140°F can degrade binder adhesives in some formulations, and pest pressure in Schertz’s established neighborhoods introduces contamination. We address all three with air sealing, proper ventilation, and rodent-proofing as part of the scope. Most Demilec top-ups we do are at year 8-12, not because the material failed chemically but because the original install skipped the sealing step.
Yes - R-value is a standardized measurement, and we source from Owens Corning, Johns Manville, Knauf, Rockwool, CertainTeed, Icynene, Demilec, and GreenFiber specifically to avoid lock-in situations. For blown-in applications, we match the settled density and coverage chart to achieve the specified R-value, whether that’s Demilec blown-in cellulose at R-3.7 per inch or an equivalent fiberglass at R-2.5 per inch with increased depth. We document the alternative specification in your written scope so there’s no ambiguity about what was installed and why.
Repair is cheaper when the existing material is clean, dry, and only partially settled - typically a $1,800-$2,800 top-up. Removal and replacement runs $2,800-$4,600 but is necessary when there’s moisture damage, pest contamination, or chemical degradation (as with Eco-Pur reaction to galvanized ductwork). We make this call based on what we find in the attic, not based on what invoice we’d prefer to write. The free estimate includes our recommendation and the reasoning behind it. Call (830) 402-5240 - estimates are free and the price is written before any work starts.
Most site visits are scheduled within 48 hours, and standard attic jobs are completed in one day once the written price is accepted. Emergency situations - active roof leaks saturating insulation, for example - get same-day assessment. We don’t manufacture urgency; we schedule based on actual crew availability and the severity of what you describe. A live person answers calls 24/7 to book the next available slot. Call (830) 402-5240.
Written by Wes Okafor, Owner, Topside Attic Insulation Schertz at Topside Attic Insulation Schertz, serving Schertz and nearby areas.