Demilec Insulation Removal & Replacement Nationwide

Demilec Insulation Removal & Replacement in West Hollywood: What to Know First

We provide independent Demilec insulation removal and replacement in West Hollywood, typically completing most jobs in one to two days with a written price delivered before any work starts. Most Demilec attic jobs in West Hollywood run between $2,800 and $6,400 depending on contamination level, access difficulty, and whether the original foam was open-cell (Heatlok HFO, Heatlok XT) or closed-cell (Heatlok HFO High Lift, Sealection 500). Call (213) 306-2607 for a free estimate with a written scope, or bring us a competing quote for our free second opinion.

Call (213) 306-2607

This page is for West Hollywood homeowners who find their Demilec spray foam has degraded, been compromised by rodent activity, or was installed over an unsealed attic floor and is now trapping moisture against the deck. We see this combination often in the 1940s bungalows and 1960s courtyard apartments off Santa Monica Boulevard and north of Melrose, where original ventilation was minimal and later Demilec retrofits missed the air-sealing step that should have come first.

How Demilec Products Fail - and How We Fix Them

• Heatlok HFO (open-cell) - hydrophilic breakdown in humid conditions. This line absorbs and retains moisture when the attic dew point is not controlled. In West Hollywood, where marine layer moisture pushes inland through June and July, we’ve pulled degraded Heatlok HFO that had turned from cream-colored to amber and was pulling away from rafter bays. We remove it completely, dry the substrate with targeted ventilation, seal all top plates and penetrations, then replace with a closed-cell alternative or a properly vented open-cell system depending on the roof assembly.
• Heatlok XT (open-cell) - dust and particulate settling in low-density areas. The 0.5 lb/ft³ density leaves voids where cellulose dust and construction debris collect over years. We find this in West Hollywood remodels where Demilec was applied over original lath-and-plaster ceilings without proper cleaning. Our crew vacuums the degraded XT to substrate, performs a boroscope inspection of every bay, then replaces with a higher-density open-cell or a hybrid system with air-sealed drywall below.
• Heatlok HFO High Lift (closed-cell) - off-ratio curing from temperature swings. This 2.0 lb/ft³ closed-cell system is sensitive to substrate temperature during application. In West Hollywood garages converted to ADUs, we’ve found High Lift that cured brittle and cracked where the unconditioned space saw 40-degree morning swings. We cut out the failed sections, grind to sound substrate, and reapply with a monitored substrate temperature log - or switch to a more forgiving closed-cell if the assembly won’t stabilize.
• Sealection 500 (open-cell) - rodent nesting and biological contamination. The soft, low-density structure is ideal for rats and squirrels to tunnel through. We’ve removed Sealection 500 in West Hollywood attics where a single roof rat entry point led to galleries through 40 percent of the installed volume. We remove all contaminated foam, sanitize the substrate with an enzyme treatment, rodent-proof all access points with 1/4-inch hardware cloth, then replace with a rodent-resistant mineral wool or closed-cell system depending on the homeowner’s preference and budget.
• Demilec retrofit over unsealed top plates - thermal bypass and stack effect acceleration. This isn’t a product failure; it’s a sequence failure. We regularly find Demilec spray foam (all lines) installed over attic floors where top plates, can lights, and duct chases were never sealed. The R-value on the bag assumes an air barrier; without one, conditioned air escapes through the foam itself. We remove the compromised insulation, seal every penetration with foam and tape, then reinstall - because the R-value on the bag assumes you did it in that order.

Our Demilec Insulation Removal & Replacement Process

1. 1
   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, boroscope, and blower-door rig.
2. 2
   Diagnose and document. We identify the Demilec line, test for moisture content in the substrate, and photograph every bay. You get a Documented Photo Record before we start.
3. 3
   Written price and parts decision. We deliver a flat price with scope and warranty in writing. For replacement, we discuss OEM-compatible Demilec products versus alternatives from Owens Corning, Johns Manville, or Rockwool - no proprietary lock-in.
4. 4
   Removal and substrate prep. We vacuum or cut out failed foam, HEPA-filter the space, treat biological contamination if present, and seal all air leaks before any new material goes in.
5. 5
   Replacement and verification. New insulation is installed to California Energy Code. On applicable jobs, we run a blower-door test - pressurizing the house to 50 pascals to locate infiltration paths - and hand you the pre- and post-job numbers.
6. 6
   Cleanup and closeout. We leave a clean attic, a written warranty, and your Documented Photo Record. The 365-Day Done Right Promise begins the moment we finish.

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What Demilec Insulation Removal & Replacement Costs in West Hollywood

Price moves with three factors: square footage of installed foam, contamination level (rodent, mold, or water), and access difficulty - West Hollywood’s steep pitch roofs and tight scuttle holes add labor hours. We also service Reflectix and other reflective insulation systems if your assembly includes layered products.

Every estimate is free, written, and delivered before any work starts. Bring us a competing quote and we’ll read it with you - our free second opinion, no obligation.

Why West Hollywood Homeowners Call Topside Attic Insulation West Hollywood for Demilec Work

We’ve been inside more than a few bungalows off Santa Monica Boulevard - air-sealing the top plates before a single bag of cellulose goes in, because that’s the sequence that actually holds an R-value. Our crew knows Demilec’s specific failure modes: the hydrophilic tendency of Heatlok HFO, the brittleness of off-ratio High Lift, the rodent vulnerability of Sealection 500. We don’t guess; we test, document, and publish the blower-door numbers so you can verify the result when your utility bill arrives.

Under Haven Standard: flat price, written scope, written warranty before anyone lifts a tool. Background-checked, uniformed technicians. A live person answers the phone. And if it’s not done right, we make it right - 365-Day Done Right Promise, no exceptions.

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