Demilec Attic Insulation Nationwide

Demilec Attic Insulation: The Pflugerville Owner’s Guide

We stock and install Demilec-compatible spray foam and open-cell insulation systems in Pflugerville, with most attic retrofits running between $2,800 and $5,400 depending on square footage and whether the existing material needs full removal. Same-day assessments are available, and we carry Demilec-equivalent formulations on our trucks for homes in the Stone Hill Town Center corridor and throughout the 78660. Most Pflugerville homeowners discover their Demilec insulation is failing when upstairs rooms won’t hold temperature despite the AC running continuously, or when they spot the telltale yellowing and powdering that means the foam has begun to degrade in our Central Texas heat.

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Which Demilec Models This Applies To

Demilec’s residential attic line in Central Texas is dominated by the Heatlok HFO Pro series (closed-cell, 2.0 lb density) and the Sealection 500 open-cell formulation (0.5 lb density), both commonly found in Pflugerville builds from 2012 to 2020. The critical compatibility gotcha: Heatlok HFO Pro requires a substrate temperature above 60°F at application, which means winter installs in unconditioned Pflugerville attics often failed to achieve full adhesion if the crew didn’t heat the space first. You can identify your formulation by the spray pattern on exposed framing, HFO Pro leaves a tight, orange-peel surface with visible cell structure, while Sealection 500 cures to a softer, spongier plane.

Topside Attic Insulation Pflugerville is an independent service provider, not affiliated with Demilec. For replacement, we source equivalent-performance materials from our supplier network including Demilec, Icynene, and Johns Manville, matching R-value and vapor permeance to what was originally specified rather than defaulting to whatever’s cheapest. The OEM-versus-aftermarket decision here is less about brand loyalty than about density match: installing 0.5 lb open-cell where 2.0 lb closed-cell was removed creates a vapor-profile mismatch that can drive moisture into roof sheathing during Pflugerville’s spring humidity spikes.

Signs Your Demilec Attic Insulation Is Failing

• Uneven temperature distribution upstairs. The foam has pulled away from rafter bays or settled at the eaves, creating thermal bypass channels. We see this most often in Pflugerville homes where the original installer skipped adhesive primer on OSB roof decking in July heat.
• Yellowing, powdering, or crumbling at foam surfaces. UV degradation and thermal oxidation break down the polymer chains. In attics with gable vents or missing radiant barriers, Pflugerville’s 100°F-plus summer peak loads accelerate this to a 10-12 year effective lifespan rather than the 20-year nominal rating.
• Musty odor or visible mold on roof sheathing. Open-cell foam in a climate with our humidity load can become a moisture reservoir if the interior vapor drive isn’t managed. The foam itself isn’t mold food, but the accumulated condensation on cold sheathing behind it is.
• Ice damming or persistent icicles in winter. Even in Pflugerville’s mild winters, air leakage through compromised foam lets conditioned air reach the roof plane. The pattern usually tracks to the top plates of interior walls, a detail the original crew sealed poorly.
• HVAC runtime increases year-over-year. Your unit isn’t failing; the building envelope is. We document this with blower-door numbers, a pressurization reading that shows, in one figure, how much air the house is losing. A Pflugerville home with properly maintained Demilec foam should read under 1,500 CFM50; we regularly measure 3,000-plus on failing installs.

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Replacement Cost & What’s Included

What drives the range: square footage is obvious, but the hidden variable is how much failed foam needs mechanical removal versus how much can be shaved and recoated. Demilec’s closed-cell formulations bond aggressively to wood; full removal adds four to six hours of labor. Every replacement quote from us includes the written scope, the written warranty, and a Documented Photo Record. On applicable jobs, we run a blower-door test before and after, and you get the pre- and post-job report with actual CFM50 numbers. The 365-Day Done Right Promise applies to all completed work.

DIY or Call Us?

There’s a short, honest list of what a homeowner can safely check: visual inspection from the attic hatch for yellowing or gaps, a flashlight sweep for obvious mold on sheathing, and a thermometer reading comparing the attic air temperature to the upstairs hallway. Do not attempt removal yourself. Demilec’s two-component spray foam is an isocyanate-based system; the cured material is inert, but cutting or grinding it releases respirable particulates and uncured chemical traces. More immediately dangerous: attic work in Pflugerville’s summer heat is a genuine medical risk without hydration protocols and a spotter.

Where DIY goes wrong is in the prep. Foam replacement without prior air sealing of top plates, electrical penetrations, and can-light housings just repeats the original failure mode. We seal first, then insulate, in that order. Call (737) 259-8352 for a free assessment. We’ll read any competing quote with you under our Free Second Opinion policy, and if you move forward, you’ll get a written price before any work starts.

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