Demilec Insulation Removal & Replacement in Pasadena: What to Know First
We provide independent Demilec insulation removal and replacement in Pasadena, with most jobs completed in one to two days and a written price delivered before any work starts. Demilec’s open-cell and closed-cell spray foam lines - including Heatlok HFO Pro, Heatlok XT, and Sealection 500 - are common in Pasadena homes built or retrofitted between 2010 and 2020, and they fail differently than batt or blown-in systems when moisture, rodents, or off-gassing issues develop. Our crew removes the compromised foam, remediates the substrate, and reinstalls to current code with documented before-and-after blower-door readings on every job.
This page is for Pasadena homeowners who see sagging foam, smell persistent chemical odors, or have been told their Demilec insulation needs to come out. Call (213) 816-5351 for a free estimate with a written scope.
How Demilec Products Fail - and How We Fix Them
- Heatlok HFO Pro shrinkage at roof decks in Pasadena’s summer heat. This closed-cell formulation can pull away from rafters when attic temperatures exceed 140°F for sustained periods, which happens regularly in Pasadena’s inland valleys from July through September. We find gaps at the foam-to-wood interface that bypass the air barrier entirely. Our fix: mechanical removal of the separated foam, substrate cleaning with a nylon brush and vacuum system, then reinstallation with a higher-temperature-rated closed-cell product or a hybrid approach using Rockwool at the roofline.
- Sealection 500 water absorption in crawl spaces after Pasadena’s winter rains. This open-cell foam is vapor-permeable by design, which means it wicks moisture when installed below grade without a proper vapor barrier underneath. We’ve pulled saturated Sealection 500 from crawl spaces in the Linda Vista area that weighed three times its dry mass and supported mold growth on the joist bays. Our fix: full removal, HEPA vacuuming of the bays, installation of a 6-mil polyethylene vapor barrier on the ground, then replacement with closed-cell foam or a conditioned crawl space assembly.
- Heatlok XT off-gassing in tight Pasadena attic assemblies. The XT series uses a higher isocyanate ratio for greater R-value per inch, but in attics with limited ventilation - common in the smaller bungalows near Old Town - the curing process can leave residual odors that persist for months. Homeowners report headaches and eye irritation that trace directly to the foam. Our fix: complete removal using controlled demolition, active ventilation during the cure window of replacement material, and blower-door verification that the attic is not negatively pressurizing living space.
- Rodent nesting in Demilec open-cell foam at eave intersections. Mice and roof rats find the cellular structure of open-cell foam ideal for tunneling, especially where Pasadena’s mature oak canopy provides ready access near the roofline. We’ve found extensive galleries in Sealection 500 near the eaves of homes in the San Rafael Hills. Our fix: removal of contaminated foam down to solid substrate, application of a bittering agent to deter re-entry, rodent-proofing of all penetrations with galvanized steel mesh, then reinstallation with a denser closed-cell product at the vulnerable eave zones.
- Demilec foam degradation from incompatible chemical exposure. Homeowners or prior contractors sometimes apply pest control dusts, bleach solutions, or petroleum-based sealants directly to foam surfaces, triggering breakdown. We’ve seen Heatlok HFO Pro turn crumbly and yellow where mothball crystals were placed in attic corners near Pasadena’s older homes. Our fix: removal of chemically compromised foam, neutralization wash where appropriate, and replacement with virgin material - never patch over degraded substrate.
Our Demilec Insulation Removal & Replacement Process
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Call and scope. A live person answers 24/7. We schedule a site visit, and Wes Okafor or a senior tech arrives with a moisture meter, thermal camera, and blower-door rig.
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Diagnosis and documentation. We identify the Demilec line, map the failure extent, and photograph everything. You receive a written price, scope, and warranty before anyone lifts a tool - Haven Standard Clause 1.
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Controlled removal. We cut or grind the foam using tools selected for the substrate - drywall, sheathing, or masonry - to prevent damage. HEPA containment runs continuously.
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Substrate remediation. Cleaning, drying, mold treatment if needed, and air sealing of all top plates, can lights, and penetrations. Seal the leaks first. Then insulate. The numbers will tell you why.
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Replacement and verification. We install replacement insulation - OEM Demilec, Icynene, Rockwool, or Johns Manville depending on the assembly and your preference. On applicable jobs, we run before-and-after blower-door tests and publish both numbers in your job folder.
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Cleanup and record delivery. Full site cleaning, disposal documentation, and your Documented Photo Record with thermal images and blower-door readings. The 365-Day Done Right Promise begins at completion.
What Demilec Insulation Removal & Replacement Costs in Pasadena
Most Demilec removal and replacement jobs in Pasadena fall in these ranges:
- Partial attic removal (one bay or section, localized failure): $1,800-$3,400
- Full attic removal and replacement, open-cell to open-cell: $4,200-$7,800
- Full attic removal and replacement, open-cell to closed-cell upgrade: $6,500-$11,000
- Crawl space removal and encapsulation assembly: $5,000-$9,500
- Roof deck removal and reinstallation (cathedral ceiling): $8,500-$15,000
What moves the price: accessibility (steep Pasadena roofs add time), contamination level (rodent-soaked foam requires hazmat handling), substrate repairs, and whether we’re converting from open-cell to closed-cell. We also service Reflectix and other radiant barrier systems if your assembly includes layered products.
Call (213) 816-5351 for an exact quote - estimates are free, and we provide a Free Second Opinion on any written estimate you already have.
Why Pasadena Homeowners Call Topside Attic Insulation Pasadena for Demilec Work
We’ve been in attics from Bungalow Heaven to the Craftsmans along Orange Grove Boulevard, and we’ve learned that Demilec foam failures in Pasadena follow patterns tied to this city’s specific climate and housing stock. Our techs know the difference between Heatlok HFO Pro and Heatlok XT by sight and smell, and we stock removal equipment sized for the tight access points common in 1920s Pasadena homes.
Every job gets the Haven Standard: written price first, documented record at the end, and before-and-after blower-door numbers when air sealing is part of the scope. The 365-Day Done Right Promise means if the replacement foam shrinks, smells, or leaks, we return and make it right. Background-checked, uniformed technicians. Calls answered by a live person, 24/7. No voicemail loops.
FAQs
The original Demilec installation warranty typically terminates once the foam is altered or removed by anyone other than the original applicator. As an independent Demilec service provider, we do not extend manufacturer warranties, but our 365-Day Done Right Promise covers our removal and replacement workmanship in writing. Call (213) 816-5351 and we’ll review your original paperwork with you.
We can source current Demilec formulations including Heatlok HFO Pro and Sealection 500 through our supplier network, though we often recommend evaluating alternatives like Icynene or Rockwool depending on the failure mode. We carry no exclusive brand agreements - our materials list includes Owens Corning, Johns Manville, Knauf, Rockwool, CertainTeed, Icynene, Demilec, and GreenFiber - so the recommendation follows the building science, not a sales quota.
Localized shrinkage or mechanical damage can sometimes be spot-repaired if the surrounding foam tests solid and the substrate is dry. But moisture contamination, rodent infestation, or chemical degradation almost always requires full removal because the problem extends beyond what’s visible. We use thermal imaging and moisture meters to map the actual boundary before we quote - no guesswork, no upsell.
Most Demilec removal and replacement jobs in Pasadena are scheduled within 3-5 business days of estimate approval, with emergency situations (active water intrusion, severe odor) prioritized same-day or next-day. Weather matters less for interior attic work, but roof deck jobs may shift during Pasadena’s rare heavy rain windows.
You get a written completion statement, your Documented Photo Record with date-stamped images of each phase, and on applicable jobs the before-and-after blower-door readings showing your home’s air leakage rate in CFM50. Wes Okafor keeps a laminated copy of the pre- and post-job thermal images in every customer folder, because a color gradient showing a cold spot sealed is easier to understand than anything we could say about it.
Ready to get a written price on your Demilec insulation removal and replacement? Call (213) 816-5351. A live person will answer, schedule your free estimate, and you’ll have a flat price and written scope before any work starts.
Written by Wes Okafor, Owner, Topside Attic Insulation Pasadena at Topside Attic Insulation Pasadena, serving Pasadena and nearby areas.