Demilec Insulation Removal & Replacement in Irvine: What to Know First
We remove and replace Demilec spray foam insulation in Irvine homes, typically completing the job in one to two days depending on the area affected. Cost runs $3.50 to $7.50 per square foot for full removal and replacement, with contaminated or moisture-damaged foam landing on the higher end. If you’re dealing with failing Demilec foam and want a straight answer on what happened and what it’ll take to fix, call (949) 832-7835 and a live person answers, day or night.
This page is for Irvine homeowners who own a Demilec-insulated property and need the foam taken out and replaced correctly. Whether your foam was installed years ago and has started failing, or you’ve discovered contamination issues, we’ll walk you through exactly what’s involved. Written for homeowners, not other contractors.
How Demilec Products Fail - and How We Fix Them
- Sealection 500 open-cell shrinkage and pull-away. This is the most common failure we see in Irvine attics. When Demilec’s open-cell Sealection 500 was installed in hot roof decks, the foam sometimes pulled away from the sheathing as it cured. In Woodbridge and other older Irvine neighborhoods, we regularly remove Sealection 500 that’s detached from rafters by a half-inch or more, leaving a thermal gap that lets attic heat pour in. The fix: full mechanical removal, surface prep, and replacement with a properly conditioned closed-cell or upgraded open-cell foam.
- Heatlok HFO delamination from substrate. Demilec’s closed-cell Heatlok HFO is a solid product, but we’ve seen delamination when it was sprayed over dusty or improperly prepped surfaces. The foam itself is fine, but it’s not adhering. You can’t just patch this - the detached sections have to come out and the substrate cleaned before new foam goes in.
- Odor and off-gassing from improper ratio mixing. This is the complaint that drives most removal calls. When the A and B sides of Demilec foam weren’t heated or mixed correctly at installation, the chemical reaction never fully completes. Homeowners describe a fishy or ammonia smell that gets worse in heat. Irvine summers push attic temperatures past 140°F, which makes an improperly cured Demilec installation impossible to live with. The only real fix is removing the affected foam entirely and reinstalling with correct equipment and ratios.
- Moisture trapping behind closed-cell foam. In some Irvine homes with pre-existing roof leaks or high crawl space humidity, closed-cell Demilec foam (especially Heatlok HFO) trapped moisture against the sheathing. This creates a rot risk you won’t see until the foam comes down. We’ve opened walls in Northwood and Turtle Rock where the foam looked intact from the living space but hid soft sheathing behind it. Our removal process includes a substrate inspection so the homeowner knows exactly what’s underneath before we install anything new.
- Vermiculite and pre-Demilec legacy insulation contamination. A lot of Irvine homes built in the 1970s and 1980s have old vermiculite or fiberglass under or around later Demilec foam work. When we do a Demilec removal, we often find the original insulation was never fully extracted before the foam went in. We handle both: safe removal of all legacy material and the Demilec foam, then fresh installation from the deck up.
One honest note: Demilec makes a good product. Most failures we see in Irvine come down to installation error, not manufacturing defects. That’s an important distinction when you’re deciding whether to patch or remove.
Our Demilec Insulation Removal & Replacement Process
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Call and talk to a live person. We answer 24/7. You’ll describe what you’re seeing or smelling, and we’ll ask the right questions to determine if you need a removal consult or a full diagnostic visit.
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On-site inspection and moisture reading. We inspect the affected areas, take moisture readings on the substrate, and identify the exact Demilec product installed. If contamination or odor is the issue, we’ll pinpoint the scope of affected foam - it’s not always the whole attic or wall cavity.
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Honest repair-vs-remove conversation. We don’t push removal when a targeted extraction fixes the problem. But for odor, adhesion failure, or moisture trapping, partial removal usually doesn’t hold. Neil’s rule: if we wouldn’t put it in our own house, we’re not recommending it for yours.
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Contained removal and cleanout. We mechanically extract the Demilec foam using HEPA-filtered vacuums and full containment where needed. For contaminated or pest-damaged areas, we follow safe-handling protocols and dispose of material properly.
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Substrate inspection and prep. Before any new insulation goes in, the exposed surfaces are checked for rot, leaks, or damage. If we find a problem, you’ll know before you spend another dollar on replacement.
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Replacement installation and verification. We install the replacement insulation suited to your home’s construction and Irvine’s climate, then verify coverage and depth. Every job is backed by our 90-Day Done Right Promise: if it’s not done right, we make it right.
What Demilec Insulation Removal & Replacement Costs in Irvine
Here’s what Irvine homeowners typically pay for Demilec removal and replacement:
- Attic open-cell (Sealection 500) full removal and replacement: $3.50-$5.50 per sq ft
- Attic closed-cell (Heatlok HFO) removal and replacement: $5.00-$7.50 per sq ft
- Wall cavity Demilec removal and re-insulation: $4.50-$6.50 per sq ft, depending on access
- Odor-remediation removal only (no replacement): $2.50-$4.00 per sq ft, plus disposal
What moves your price: the square footage affected, whether we’re working in an attic or closed wall, the condition of the substrate we find underneath, and whether contamination or pest debris requires special handling. You’ll get a written, upfront price before we start. Call (949) 832-7835 for a free estimate, and ask about our $50 Off Any Repair Over $250 when your total qualifies.
Why Irvine Homeowners Call Warmline Insulation Co. for Demilec Work
Most Irvine homeowners call us after a generalist contractor says the foam is “probably fine” or quotes a patch job that doesn’t address the real problem. Demilec removal isn’t a side project; it’s serious work that affects your air quality, your energy bills, and the structural health of your home. We’ve been doing this since 2011, and our technicians are background-checked, uniformed, and trained specifically on spray foam extraction. Every Demilec job we do is backed by the 90-Day Done Right Promise, and our phones are answered by a live person 24/7.
We also service other insulation brands, including Reflectix, so if you’ve got a mixed-brand situation in your attic or crawl space, one crew handles the whole job. Most removal and replacement work is completed in a single visit - you won’t be living with an open attic or exposed walls for long. Our team is led by Neil Ashford, who’s been working Irvine homes for years and has seen firsthand how Woodbridge’s older construction bleeds conditioned air through failed attic insulation. Comfortable houses don’t happen by accident - they’re built that way on purpose.
FAQs
Demilec’s product warranty generally covers manufacturing defects, not installation errors like improper mixing, poor adhesion, or odor issues from incorrect application. As an independent Demilec service provider, we’re not affiliated with the manufacturer, but we’ll help you document the failure clearly so you can pursue a warranty claim if one applies. Call (949) 832-7835 and we’ll assess what you’re dealing with before you try to navigate the warranty process alone.
Sometimes. If the failure is localized - a small delaminated section or a limited area of odor - targeted removal and re-spray can work. But for widespread adhesion failure, moisture trapping, or whole-attic odor, partial removal usually means you’re back in the same position within a year or two. We’ll give you an honest recommendation after inspection, not before.
For odor or moisture emergencies, we can typically get a crew out within 24 to 48 hours depending on the season. Standard removal and replacement jobs are scheduled within a week in most cases, and most projects are completed in one to two days on site.
Repeated patch jobs add up fast, especially when the underlying problem - poor adhesion, bad mixing, trapped moisture - keeps creating new failures. A proper removal and replacement costs more up front but ends the cycle. Ask about our $89 Seasonal Tune-Up if you’re not ready for full removal yet: we’ll assess the extent of the damage so you can plan and budget accurately.
Yes. You can take $50 off any repair over $250, there’s an $89 Seasonal Tune-Up for evaluating your existing foam’s condition, and we offer a permanent 5% discount for seniors and veterans. Call (949) 832-7835 to confirm which offers apply to your job.
Dealing with failed Demilec insulation in Irvine is frustrating, but you don’t have to manage the removal process alone. Call Warmline Insulation Co. at (949) 832-7835 and a live person answers 24/7. We’ll talk through what you’re seeing, schedule an inspection, and give you a written, upfront price for the removal and replacement work.
Written by Neil Ashford, Owner, Warmline Insulation Co. at Warmline Insulation Co., serving Irvine and nearby areas.