Demilec Attic Insulation Nationwide

Demilec Attic Insulation: The Burbank Owner’s Guide

Most Demilec attic insulation replacements in Burbank run between $2,800 and $5,400 installed, depending on attic square footage and whether the existing material needs full removal. We stock Demilec-compatible open-cell and closed-cell spray foam systems, and we can usually inspect and quote same-day. Homeowners typically figure out something’s wrong when their summer AC runs nonstop but the second bedroom never cools below 78, or when they pop the attic hatch and find foam that’s pulled away from the rafters or turned crumbly and yellow.

Call (213) 816-1699

Which Demilec Models This Applies To

Demilec’s product line for residential attics breaks into two families: the Heatlok HFO closed-cell series and the Sealection 500 open-cell series. Heatlok HFO is the rigid, higher-R-value foam you’ll see in Burbank homes where the owner wanted to condition the attic as living space; Sealection 500 is the softer, vapor-permeable open-cell used in vented attic floors. The label matters because the two systems cannot be patched into each other, and mixing them voids any remaining warranty coverage.

To identify what you have, check the stamp on the foam itself or any paperwork from the original install. Heatlok HFO carries a density around 2.0 lb/ft³ and an R-value of 6.9 per inch; Sealection 500 runs lighter at 0.5 lb/ft³ and R-3.7 per inch. If the original installer used Demilec’s older Heatlok Soy 200 formula, common in Burbank builds from 2012 to 2018, note that Demilec discontinued that specific resin blend. We source compatible modern HFO formulations that bond to the old substrate without full tear-out, which saves most homeowners $1,200 to $2,000 versus starting from bare studs.

Topside Attic Insulation Burbank is an independent service provider, not affiliated with Demilec. We also stock parts and materials for Reflectix radiant barrier systems when a hybrid approach makes sense for the roof assembly.

Signs Your Demilec Attic Insulation Is Failing

• Hot rooms directly below the attic, even with the AC running. In Burbank, where attic temperatures push 140°F in August, separated or degraded Demilec foam creates thermal bypasses - air paths that short-circuit the insulation layer. The R-value on the label becomes irrelevant if conditioned air is leaking around it.
• Yellowing, crumbling, or powdery foam surfaces. This is UV degradation, usually from an attic with inadequate ventilation or a failed radiant barrier. Demilec’s open-cell products are particularly vulnerable; once the surface skin breaks down, the foam loses structural integrity and starts shedding into your HVAC returns.
• Musty odors or visible mold on attic sheathing. Closed-cell foam like Heatlok HFO is a vapor barrier when installed thick enough, but if the original crew skimped on thickness in a Burbank retrofit, moisture can condense on the cold side during our winter temperature swings. That’s a building science failure, not a product defect, but the fix is the same: remove and reinstall to spec.
• Ice-cold ductwork in summer or sweating ducts. When attic insulation fails, your ducts become the path of least resistance for heat gain. We’ve measured supply plenums at 95°F in Burbank attics where the Demilec had separated from the rafter bays, essentially exposing the ducts to ambient attic air.
• Spiking summer electric bills with no rate change. A blower-door test will usually reveal the culprit: the house is leaking conditioned air into the attic through gaps the foam was supposed to seal. The R-value is what the label says. The performance is what the blower-door test says. We care about the second number.

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Replacement Cost & What’s Included

What drives the range: attic square footage, pitch (steeper means slower work), whether we need to remove old foam first, and how many penetrations need air-sealing before the new foam goes in. Every quote from us is a written price before any work starts, per Haven Standard Clause 1. The price includes material, labor, cleanup, and a Documented Photo Record of the completed work. Where applicable, you’ll also receive before-and-after blower-door numbers so you can verify the air-sealing result yourself. Our 365-Day Done Right Promise covers all completed work.

DIY or Call Us?

There’s a short list of things a Burbank homeowner can safely check without tools: confirm the attic hatch seal is intact, look for obvious gaps where foam has pulled away from framing, and note any discoloration or crumbling. Take photos. That documentation is useful for any contractor you call.

Everything else belongs to a crew with the right PPE and equipment. Spray foam chemistry is temperature-sensitive and requires precise substrate prep; in Burbank’s summer heat, off-ratio foam cures wrong and traps solvents that off-gas for months. The application also involves isocyanates, which are respiratory sensitizers at concentrations you cannot detect without monitoring equipment. We don’t recommend DIY spray foam installation or large-scale removal. For a free written estimate on your Demilec replacement, call (213) 816-1699. Estimates are free, and we answer live 24/7.

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