Demilec Attic Insulation Nationwide

Demilec Attic Insulation: The Burbank Owner’s Guide

If you have Demilec spray foam or Demilec loose-fill insulation in your attic and it’s failing, we stock compatible replacement material and complete most Demilec remediation jobs in Burbank in a single visit. Installed replacement typically runs $1,200 to $4,800 depending on attic size, foam type, and whether we need to remove degraded material first. You’ll know something’s wrong when rooms won’t hold temperature, your AC bill climbs in July and August, or you spot dark, crumbling foam around the attic hatch or knee walls. Call (747) 837-5834 and a live person answers, 24/7.

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Which Demilec Models This Applies To

We work with the two main Demilec product families you’re most likely to find in Burbank attics. The first is Heatlok HFO, Demilec’s closed-cell spray foam line. Heatlok HFO Pro and Heatlok HFO High Lift are the most common variants we encounter. Closed-cell foam acts as both insulation and air barrier, and in Burbank’s dry-summer climate it generally holds up well unless it was applied too thin or over a dirty substrate. The second family is Sealection 500, an open-cell foam used more for interior cavity work but sometimes found in attic rooflines. Open-cell is more breathable and less expensive, but it absorbs moisture if a roof leak develops, and that’s where we see failures start.

Identifying what you have is straightforward. Closed-cell Heatlok HFO is rigid and dense, usually cream or pale yellow, roughly 2 inches thick when properly applied. Sealection 500 is softer, spongier, and lighter in color. If you can’t tell, snap a photo of the foam and the nearest rafter label and we’ll identify it when we arrive. One gotcha we see often in Burbank: homes insulated under a previous owner’s remodel may have a third-party aftermarket foam that was marketed as “Demilec-compatible” but isn’t. If the foam has no Heatlok or Sealection markings stamped on a nearby facing, it’s probably not genuine Demilec product, and we’ll recommend full removal rather than a patch job. Warmline Insulation Co. is an independent contractor; we’re not affiliated with Demilec, but we’ve installed and repaired their products across the San Fernando Valley for over a decade.

Signs Your Demilec Attic Insulation Is Failing

• Your upstairs rooms won’t hold temperature. In Burbank’s summer heat, closed-cell foam that’s delaminated from the roof deck lets radiant heat pour into the attic. The symptom is a bedroom that’s 10 degrees hotter than the hallway at 5 p.m.
• Foam is pulling away from rafters or sheathing. This is the most common Demilec failure we see. It happens when the foam was sprayed over dusty or damp wood, or when the substrate flexed during a hot-cold cycle. Gaps as small as a quarter inch turn a sealed attic into a leaky one.
• You smell a faint musty or chemical odor near the attic hatch. Sealection 500 open-cell foam that’s been wet from a roof leak or condensation will off-gas and hold odor. In older Burbank homes near Griffith Park-adjacent canyons, morning condensation can exacerbate this.
• Foam is crumbling, flaking, or turning dark brown. Heatlok HFO is UV-sensitive. If a roof vent or skylight shaft lets sunlight hit the foam, it degrades. Dark, brittle foam means the chemical structure has broken down and it’s no longer insulating properly.
• Your energy bill climbed for no other reason. Burbank Water and Power rates aren’t getting cheaper. If your summer bill jumped 25 to 40 percent year over year and you haven’t added load, a failed attic insulation layer is a prime suspect.

Replacement Cost & What’s Included

In Burbank, you’re looking at these ranges for Demilec-compatible attic insulation replacement:

• Closed-cell Heatlok HFO replacement, smaller attic (800-1,200 sq ft roof deck): $1,800-$3,200 installed
• Closed-cell Heatlok HFO replacement, larger attic (1,200-2,000 sq ft roof deck): $3,200-$4,800 installed
• Sealection 500 open-cell replacement: $1,200-$2,600 installed, depending on depth and access
• Partial removal of degraded Demilec foam (per job, before reinstalling): $400-$1,000 depending on how much is crumbling

Every quote includes removal and disposal of failed material where needed, surface prep so the new foam bonds properly, the replacement insulation, and a final air-seal pass around attic penetrations. We stock Heatlok HFO Pro and a compatible open-cell equivalent on our trucks, and we also carry Reflectix radiant barrier for hybrid attic assemblies where spray foam alone isn’t the right call. The work is backed by our 90-Day Done Right Promise: if it’s not done right, we make it right. That’s in writing.

DIY or Call Us?

You can safely inspect the attic hatch area and take photos. You can check for obvious gaps between foam and rafters, look for dark or crumbling sections, and note any musty odor. That’s useful information and it helps us quote accurately over the phone.

What you shouldn’t do is attempt to cut out and replace spray foam yourself. Closed-cell Demilec foam is a two-part chemical product that requires respirator protection during installation, precise temperature control, and a professional rig. Cutting into old foam releases particulates you don’t want in your lungs. Our technicians are background-checked, uniformed, and trained on Demilec product handling. Most jobs are done in a single visit. Call (747) 837-5834 and we’ll get you on the schedule without the runaround.

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