Demilec Insulation Removal in Los Angeles: What to Know First
Demilec insulation removal in Los Angeles typically runs $1,800 to $4,600 for a full attic and is usually completed in one to two days. We’re an independent Demilec service provider, not a factory-authorized shop, which means we tell you the truth about whether the foam needs to come out or whether a targeted fix makes more sense. If you own a home in Los Angeles with Demilec spray foam or Demilec blown-in fiberglass, and it’s wet, settled, contaminated, or failing an air-seal test, call (254) 272-5876 and we’ll give you a written price before any work starts.
How Demilec Products Fail – and How We Fix Them
Demilec makes good insulation. But every product has a failure mode, and Los Angeles attics run hotter than most manufacturers design for. Here’s what we actually see when a Demilec job goes wrong:
- Heatlok HFO High-Lift shrinkage and delamination. Heatlok HFO is a closed-cell spray foam Demilec pushed hard for California attics. The problem is when it’s installed over a substrate that wasn’t fully dry, or when the attic hits sustained 140-plus degree roof-deck temperatures in August, the foam can pull away from the rafters in sheets. The homeowner notices a musty smell or a sudden spike in cooling cost. We remove the delaminated sections back to clean wood, assess whether the remaining foam is still adhered, and re-insulate as needed.
- Sealection 500 open-cell water retention. Sealection 500 is Demilec’s open-cell product, and open-cell foam is a sponge. A small roof leak or a bathroom fan vented into the attic instead of through the roof will saturate it. Once open-cell foam holds moisture against the roof deck for more than a few weeks, you get mold and sheathing rot. In Los Angeles, we see this most in older Valley homes where re-roofs happened before 2005 and nobody updated the venting. We remove the saturated foam, dry the cavity, and address the moisture source before anything goes back in.
- Demilec blown-in fiberglass settling below R-value. Demilec’s fiberglass loose-fill, sold under names like Attic Guard, settles. In a 1,200-square-foot Los Angeles attic that was originally blown to R-38, ten years of settlement plus the occasional foot traffic from a cable installer or a pest-control visit can knock it down to R-22 or worse. The tell is ceiling temperature difference room to room. We vacuum out the old material, air-seal the attic floor, and blow fresh insulation to the written spec.
- Improper two-part foam mixing, which no amount of time fixes. Spray foam is mixed on-site through a heated hose, and if the A-side and B-side chemicals are off ratio, the foam never cures correctly. It stays soft, smells chemical, or has visible dark streaks. This is an installation defect, not a product defect, but it’s a Demilec job we see regularly in Los Angeles from the 2015-2020 building boom. The fix is full removal of the uncured foam. You can’t spot-treat a bad mix.
- Rodent and pest damage in Demilec foam. Los Angeles has rats. Rats tunnel through open-cell foam and nest in it. Closed-cell foam, they tend to chew along the edges where it meets framing. If the damage is localized, we cut out the affected runs and re-foam. If it runs wall to wall, we remove the whole thing. Rodent-saturated insulation is a health issue, not just an R-value issue.
Our Demilec Insulation Removal Process
Here’s how a Demilec removal job goes at Alden Attic Insulation, from the first call to the final walkthrough:
- 1
You call, a person answers. Not a voicemail tree. We ask about the product, the age of the home, and what you’re seeing: smell, temperature, visible damage, a failed energy audit.
- 2
We schedule a site visit inside a two-hour window. A background-checked, uniformed technician arrives, inspects the attic, tests the foam’s adhesion and moisture content, and photographs everything. You see what we see.
- 3
Written price, before anything else. The number on the written estimate is the number on the invoice. It includes removal, disposal, cleanup, and any air sealing or prep work the job requires.
- 4
Removal day. We’re in and out in one to two days for most Los Angeles homes. The crew contains the work area, removes the Demilec material with commercial vacuum equipment or hand tools depending on the product, and hauls it off. We don’t leave debris in your yard.
- 5
Post-removal inspection with you. We walk the attic together. You see the clean deck or the open cavity. If we were hired to re-insulate, we confirm the material and R-value before it goes in.
- 6
Written 365-day guarantee. Every job is covered by the 365-Day Done Right Promise. If the work fails within a year, we return at no charge.
For Demilec jobs, the parts decision is straightforward: removal doesn’t have OEM versus aftermarket parts the way an appliance repair does. But if we’re re-insulating, we use whatever product makes sense for your roof assembly and budget, from brands including Demilec, Owens Corning, Johns Manville, Knauf, Rockwool, CertainTeed, Icynene, GreenFiber, and Reflectix where a radiant barrier is called for. We don’t push one brand. We push the one that works for your attic.
What Demilec Insulation Removal Costs in Los Angeles
Every job differs, but here are the ranges we quote most often in Los Angeles.
- Partial removal of Heatlok HFO delamination (under 400 sq ft): $1,000 to $2,200
- Full removal of Demilec blown-in fiberglass from a standard 1,200 sq ft attic: $1,800 to $3,200
- Full removal of open-cell or closed-cell spray foam (whole attic): $2,800 to $4,600
- Full removal plus re-insulation to current code: $4,500 to $8,000 depending on R-value target, air sealing scope, and access
What moves the price: attic square footage, ceiling height and access (crawl spaces and low-slope roofs cost more), how saturated or damaged the material is, disposal fees, and whether you’re re-insulating at the same time. The written price you approve is the price you pay, and it includes all labor, equipment, disposal, and cleanup. Call (254) 272-5876 for a free estimate from a technician who has actually been in Los Angeles attics, not a call center reading a script.
Why Los Angeles Homeowners Call Alden Attic Insulation for Demilec Work
We’re part of the Garrison Partners family, which has been holding every job to The Garrison Standard since 2002. That standard means a written price in your hand before a tool comes off the truck, a written 365-Day Done Right Promise on every removal, and background-checked, uniformed technicians who arrive inside the window they gave you. Our owner, Bryce Holloway, grew up in Reseda and learned building science through the construction technology program at Los Angeles Valley College before spending two-plus decades in L.A. County attics. He’s the one who sets the tone: if your attic needs work, we’ll tell you exactly what and why. If it doesn’t, we’ll tell you that too. When a Demilec job calls for something other than Demilec, we can also work with Reflectix and the other trusted brands above, so we’re not married to one manufacturer’s product line. We’re married to doing the job correctly and standing behind it in writing.
Good insulation doesn’t announce itself – you just stop noticing the heat.
FAQs
It can, which is why we document the failure with photos and a written assessment before we start. If the material failed due to an installation defect, you may have a claim with the original installer or the manufacturer. If the material is simply old, saturated, or damaged by pests, the warranty is likely expired or non-applicable, and removal is the fix. Call (254) 272-5876 and we’ll tell you what we see before any work begins.
Yes, with the right tools and patience. Closed-cell foam requires mechanical removal and scraping, and there’s always a small amount of surface scuffing to the wood, but a trained crew removes the foam without gouging or compromising the deck. We do this work on Los Angeles homes regularly, including those in the Valley and the San Gabriel foothills where attic temperatures make adhesion failures more common. Call (254) 272-5876 for an assessment, and we’ll give you an honest take on whether the deck underneath is worth saving.
For most jobs we’re on-site within three to five business days, and emergency work, like wet foam actively dripping or a mold concern, can often be scheduled sooner. We answer calls 24/7 with a live person, so call (254) 272-5876 and tell us what’s going on. We’ll level with you about timing.
Sometimes adding more on top is fine. Sometimes it’s the wrong move. If the existing Demilec material is dry, adhered, and not contaminated, we’ll tell you to leave it and we’ll quote you for topping off the R-value. If it’s wet, moldy, pest-damaged, or delaminating, adding insulation on top just buries the problem, and you’ll pay to fix it later. Our job is to tell you which path applies to your attic, not to sell a removal you don’t need. Call (254) 272-5876 for an honest assessment.
We haul it off and dispose of it through licensed waste facilities. Wet or contaminated spray foam goes to facilities that handle construction debris and insulation waste specifically. We don’t leave bags in your driveway or bins in your yard. Disposal is included in the written price.
Written by Bryce Holloway, Owner, Alden Attic Insulation, serving Los Angeles and nearby areas.