Demilec Spray Foam Insulation Nationwide

Demilec Spray Foam Insulation in Los Angeles: What to Know First

We provide independent Demilec spray foam insulation repair and installation across Los Angeles, with most jobs completed in one visit. Expect to pay between $1.50 and $4.50 per board foot depending on whether you need open-cell or closed-cell foam, with full attic jobs in Los Angeles typically landing between $3,000 and $9,000. You’ll know the price before we pull the hatch.

Call (864) 428-1615

This page is for Los Angeles homeowners who already have Demilec foam in their walls, attic, or rim joists and need someone who actually understands how it behaves in Southern California’s dry-heat climate. If you’re noticing uneven temperatures, higher bills, or foam that’s pulling away from the framing, call us at (864) 428-1615 and we’ll tell you what’s going on.

How Demilec Products Fail – and How We Fix Them

Demilec makes solid foam. But every product has its patterns, and after years of opening up Los Angeles attics and crawl spaces, we know what to look for before we even climb the ladder.

• Heatlok HFO off-ratio foam. Heatlok HFO Pro is a closed-cell line we see in a lot of LA rim joist and roof deck applications. When the A and B sides aren’t mixed at the right temperature or ratio, the foam cures soft and friable instead of dense. You’ll see it flaking or crumbling at the edges. We cut out the bad section, check the substrate, and re-spray with a properly heated, properly mixed rig.
• Sealection 500 shrinkage at framing joints. Sealection 500 is Demilec’s open-cell line, and in Los Angeles attics that hit 140 degrees in August, we see it shrink back from rafters and top plates over time. That creates air gaps exactly where you don’t want them. The fix is cutting back the seam, cleaning the surface, and re-filling with compatible open-cell foam.
• APX 2.0 adhesion failure on dusty sheathing. Demilec’s APX 2.0 closed-cell foam doesn’t bond well to construction dust or old blown-in fiberglass residue. In older Los Angeles homes, we frequently find foam that looks fine from below but has delaminated from the roof deck. We probe it, confirm the void, and re-apply after proper surface prep.
• Heatlok Soya UV degradation on exposed edges. Heatlok Soya was one of Demilec’s soy-based closed-cell lines, and any foam left exposed to direct sun in Los Angeles breaks down fast. If a previous contractor didn’t cover the foam with a thermal barrier or coating, the top layer gets chalky and powdery. We remove the degraded layer and re-seal with a UV-stable product.
• Improper lift thickness on vertical surfaces. Spray foam needs to be applied in lifts of 1 to 2 inches. When someone rushes a wall cavity in one thick pass, the foam generates too much heat during cure and can scorch or develop voids behind the surface. We’ve pulled out enough of these in LA to know the smell immediately. The repair is to cut out the entire cavity, let it breathe, and re-spray correctly.

Our Demilec Spray Foam Insulation Process

Every Demilec job we do in Los Angeles follows the same steps. No shortcuts, no surprises.

1. 1
   You call (864) 428-1615. A live person answers, day or night. We schedule a time that works for you and send the technician’s name and photo before the visit.
2. 2
   We diagnose in the attic. Your tech climbs into the space, probes the existing foam, checks depth and density, and identifies exactly what’s failing and why. Garrett Sloane built this company on telling homeowners what we found, not what we want to sell.
3. 3
   You get a written price. Before any work starts, you have the full number in writing. That’s the price. It doesn’t change after we find something else unless you approve it first.
4. 4
   We do the repair or re-spray. We remove the failed foam, prep the surface properly, and re-apply using Demilec-spec materials. When OEM product makes sense for the application, we use it. When a quality aftermarket product does the same job at a better price, we tell you that too.
5. 5
   We test it. Depth checks, adhesion probes, and a visual inspection of the full area before we close anything up. You’re invited to look before we finish.
6. 6
   You get the guarantee in writing. Every job carries the 365-Day Done Right Promise. If it’s not right, we come back and make it right, free of charge.

What Demilec Spray Foam Insulation Costs in Los Angeles

Here’s what current Demilec work runs in the Los Angeles market, based on the jobs we’ve priced in recent months.

• Rim joist spray foam (per joist bay): $45 to $90 each. Most LA homes have 8 to 20 accessible bays.
• Open-cell attic floor spray (Sealection 500): $1.50 to $2.50 per board foot. A 1,500-square-foot attic at 5.5 inches runs $4,500 to $7,500 on average.
• Closed-cell roof deck spray (Heatlok HFO Pro): $2.50 to $4.50 per board foot. Roof deck jobs run higher because of the density and the prep work.
• Garage ceiling spray foam: $800 to $2,200 depending on square footage and whether it’s open or closed cell.
• Spot repair of failed existing foam: $250 to $900 depending on access and how much foam needs to come out. This is the most common call we get from Los Angeles homeowners with older Demilec installations.

What moves the price: access (crawl spaces and low-slope roofs cost more), foam thickness, whether the existing foam needs removal, and the condition of the substrate. Call (864) 428-1615 for an exact quote. Estimates are free, and the number we give you is the number you pay.

Why Los Angeles Homeowners Call Aspen Attic Insulation for Demilec Work

Most insulation companies in Los Angeles will spray whatever foam is on the truck. We don’t work that way. We stock eight brands including Demilec, Owens Corning, Johns Manville, Knauf, Rockwool, CertainTeed, Icynene, and GreenFiber, plus Reflectix for radiant barrier applications. Your Demilec job gets the right product, not whatever happens to be left in the warehouse.

Every technician who shows up at your Los Angeles door is background-checked, identity-verified, and photo-badged under the Threshold Standard. You get their name and photo before the visit. If someone else arrives claiming to be your tech, the visit is free. That’s how seriously we take who enters your home.

And every job, Demilec or otherwise, carries the 365-Day Done Right Promise in writing. It covers labor and materials for a full year. If the repair fails, the second visit is free.

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