Demilec Insulation Removal & Replacement Nationwide

Demilec Insulation Removal & Replacement in Costa Mesa: What to Know First

Demilec spray foam removal and replacement in Costa Mesa typically runs between $1,800 and $6,500 depending on the square footage, foam type, and whether the original install left you with open-cell or closed-cell product. Most full removals we handle are completed within one to two days, and we always give you a written line-item price before any work begins. If you’re dealing with failed Demilec foam, call (657) 224-2897, and a live person will pick up, 24/7.

Call (657) 224-2897

This page is for Costa Mesa homeowners who have Demilec spray foam insulation that needs to come out. Maybe it was installed years ago and has started to shrink or pull away from the framing. Maybe a contractor botched the application and now the foam is off-gassing or holding moisture where it shouldn’t. Or maybe you bought a house and discovered the previous owner’s “great deal” on foam insulation is now your problem. Whatever brought you here, we remove failed Demilec foam cleanly and replace it with something that actually works for your home.

How Demilec Products Fail and How We Fix Them

Demilec makes legitimate spray foam products. But like any foam system, the install matters as much as the chemistry. Here’s what we actually see in Costa Mesa attics and walls, and what we do about it.

• Heatlok HFO shrinkage and pull-away. Demilec’s Heatlok HFO closed-cell line is common in Costa Mesa homes built or retrofitted in the last decade. When it’s applied too thick in a single pass, or when the substrate was dusty or too cold, the foam can cure too fast and shrink back from the framing. You’ll see gaps at the edges of stud bays, and that means air is moving right past the insulation. The fix is full removal of the affected areas and a clean reapplication, often with a different product or a corrected install technique. Patching over pulled-away foam never works. The foam has already lost its bond.
• Sealection 500 open-cell moisture trapping. Sealection 500 is an open-cell foam we occasionally find in Costa Mesa interior walls and ceilings. Open-cell foam breathes, which is fine in dry climates, but Costa Mesa’s marine layer pushes humidity into attics from May through July almost every morning. If a roof leak or a bathroom vent dumps moisture into open-cell foam, that foam holds water like a sponge against your framing. We’ve pulled out Sealection that weighed three times what it should have. The fix is removal, drying the framing, finding the moisture source, and replacing with a product suited to the actual conditions.
• Heatlok Soy off-ratio installation. Older Heatlok Soy jobs, especially from the mid-2010s, sometimes show evidence of off-ratio application. That means the A-side and B-side chemicals weren’t mixing at the right temperature or pressure, so the foam never fully cured. The telltale sign is a persistent chemical odor that never goes away, even years later. That foam has to come out. There’s no spray-over fix. We remove it down to the sheathing, ventilate the space, and reinstall with a properly calibrated rig.
• Demilec in the wrong climate zone. This one’s on the installer, not the product. We’ve seen Demilec closed-cell foam specified as a vapor barrier on the wrong side of the assembly for our coastal climate. Closed-cell foam that traps moisture against a cold surface in a Costa Mesa winter can create condensation inside the wall cavity. When we open those walls, the foam looks fine on the surface, but the framing behind it is starting to stain. Removal and re-specification is the only real fix. And nobody wants to guess which wall has the problem.
• Vermiculite and legacy materials under Demilec foam. This is a Costa Mesa-specific reality. Homes built before the 1980s in neighborhoods like Mesa Verde and the Westside often have existing loose-fill materials in the attic. When a previous owner had foam sprayed over old insulation without removing it first, the foam bonded to whatever was underneath. Now you need both materials gone, and the vermiculite or old cellulose has to be handled properly. We remove the foam first, then the legacy material, then we rebuild the thermal barrier from scratch.

Our Demilec Insulation Removal & Replacement Process

Here’s how a Demilec removal job goes at Warmline, from the first phone call to the final walkthrough. Most Costa Mesa jobs are done in a single visit, though larger or contaminated removals can take two.

1. 1
   Call and schedule. You call (657) 224-2897. A live person answers. We ask a few questions about the age of the home, the type of foam you think you have, and what symptoms you’re noticing. Then we book a time that works for you.
2. 2
   On-site inspection and diagnosis. We come out, get into the attic or open a small access point, and figure out exactly what’s going on. Neil Ashford or one of our senior techs will tell you what the foam is, why it failed, and what the honest repair options are. Sometimes the news is better than you expected.
3. 3
   Written line-item quote. Before anything happens, you get a price in writing. No surprises. We also apply any standing discounts you qualify for at that point.
4. 4
   Containment and removal. We set up dust containment, remove the failed Demilec foam mechanically, and bag it for proper disposal. We don’t leave debris in your yard or attic.
5. 5
   Replacement and testing. We install the right insulation for your home, whether that’s fresh spray foam, blown-in fiberglass from Owens Corning or Knauf, or batts from Rockwool. Then we check the result with thermal imaging where the job calls for it.
6. 6
   Cleanup and the 90-Day Done Right Promise. We clean the work area. And if anything isn’t right within 90 days, we come back and make it right. That’s a written commitment, not a handshake.

What Demilec Insulation Removal & Replacement Costs in Costa Mesa

Here are the price ranges we quote most often in Costa Mesa. The biggest cost drivers are square footage, foam type, whether the foam is accessible from the attic or hidden behind drywall, and whether there’s a moisture or pest issue that needs addressing at the same time.

• Partial attic foam removal and re-insulation: $1,800 to $3,200
• Full attic Demilec removal and replacement (1,200 to 1,800 sq ft): $3,500 to $5,500
• Wall cavity foam removal with drywall repair: $2,500 to $6,500 depending on how many cavities are opened
• Contaminated or moisture-damaged foam removal: $2,000 to $4,500 depending on moisture extent and disposal requirements

We don’t charge for the estimate. Call (657) 224-2897 and we’ll give you an exact number for your house. Seniors and veterans save 5% on every job, and if your repair is over $250, there’s an additional $50 off. Do the job right once, and your house thanks you every month after.

Why Costa Mesa Homeowners Call Warmline Insulation Co. for Demilec Work

We’ve been doing insulation work in Costa Mesa since 2011, and we’ve seen every Demilec failure mode this coastal climate can produce. Our techs are background-checked, uniformed, and trained to handle spray foam removal without damaging your framing or your drywall. We’re licensed and insured on every job. And as an independent Demilec service provider, we’re not tied to any manufacturer’s agenda. We’ll tell you if the foam should come out, if it can stay, or if a product from Reflectix, Owens Corning, Rockwool, or Knauf would serve your house better. Most jobs are completed in a single visit, and the 90-Day Done Right Promise covers everything we touch.

We also do more than foam removal. If your Demilec problem came from a moisture issue, we can handle the air sealing or crawl space work that started it. If pests chewed through the foam, our rodent proofing service is part of the same visit. One contractor, one clean fix.

Frequently Asked Questions