Demilec Spray Foam Insulation in Glendale: What to Know First
We install and service Demilec spray foam insulation in Glendale homes and commercial buildings, typically completing most residential spray foam jobs in one to two days. You won’t get a vague “it depends” quote from us: we price Demilec work by the board foot, and we’ll put the number in writing before any foam leaves the truck. If you’re noticing drafts, uneven room temperatures, or an energy bill that keeps climbing, call (747) 246-7237 and a live person will answer, any hour.
This page is written for Glendale homeowners who have Demilec spray foam, or who are considering it, and want straight answers from an independent installer who works with the product every week, not a call center reading from a script.
How Demilec Products Fail, and How We Fix Them
Demilec makes solid foam products, but like any spray foam, the long-term performance comes down to the install conditions and what the foam goes through afterward. Here’s what we actually run into in Glendale homes:
- Heatlok HFO shrinkage at the rim joist. We’ve opened up rim joist bays in homes near the Verdugo Mountains where Heatlok HFO pulled away from the framing by a quarter inch. The cause is usually a cold substrate: foam sprayed against a surface below Demilec’s recommended temperature range never adheres fully, even if it looks fine on the surface. The fix is cutting out the affected section, warming the substrate, and respraying. Foam over foam won’t fix a bad bond.
- Sealection 500 open-cell getting crunchy and brittle in attic heat. Glendale summers push attic temperatures well past 140 degrees. Sealection 500 is a good open-cell product, but prolonged thermal cycling eventually breaks down the cell structure near the roof deck. We see homeowners in the hills above the 2 freeway find chunks of foam dust in their attic storage. When it gets brittle, the only real fix is removal and replacement with a closed-cell option like Heatlok HFO Pro, which holds up far better under direct roof deck heat.
- Off-ratio foam that never cured. Demilec foam depends on a precise A-side/B-side ratio. A machine that runs even slightly off ratio produces foam that stays tacky or spongy for months and off-gases a smell that never fully clears. This is an installer problem, not a Demilec problem, but the homeowner pays for it either way. We test every Demilec batch we pull with a moisture meter and a hardness check before calling the job done.
- Animal intrusion through under-sprayed perimeter gaps. Rats and squirrels in the Glendale foothills don’t care what brand of foam you used. They’ll chew through open-cell Demilec Sealection in a week if it’s the only thing between them and your attic. We regularly see rodent tunnels right through open-cell foam along the top plate. The fix combines full removal of the damaged foam, proper air sealing at the intrusion point, and respraying with closed-cell, which pests don’t chew through as readily.
- Bowed interior walls from over-applied Heatlok. Closed-cell foam expands with force. In older Glendale homes with 1950s lath-and-plaster walls or half-inch drywall, an installer who sprays Demilec Heatlok too thick in one pass can bow the wallboard. We’ve corrected this in Burbank-border homes more than once. The fix means removing the drywall, shaving back the over-expanded foam, and reinstalling. It’s tedious, and it’s why we monitor substrate deflection during every Demilec install.
Our Demilec Spray Foam Insulation Process
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You call or click. A live person picks up. We schedule a time to look at your Glendale property, usually within a couple of days, sometimes same-week.
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We assess the space properly. We check for existing foam, air leaks, pest activity, and moisture. We map where Demilec spray foam will actually solve your problem, and we’ll tell you straight if another material fits better.
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We give you a written quote. Board-feet, material, labor, cleanup. No trip charge inside the county. You’ll also get a free second opinion if another company has already quoted you.
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We prep like the job matters. Floors and surfaces get masked. We control temperature and humidity if the substrate is cold or wet, because spraying Demilec foam in the wrong conditions is how most failures start.
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We spray and inspect. Our techs apply the Demilec product at the right thickness and verify adhesion before we leave. We check every square foot, not spot-check.
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We clean up and back it. The site gets restored to better-than-we-found-it shape. Then the Done Right Promise kicks in: if it isn’t done right, we make it right for as long as you own the home. You won’t chase us. We’ll be the one down the road.
What Demilec Spray Foam Insulation Costs in Glendale
Demilec spray foam in Glendale generally runs between $1.10 and $3.50 per board foot installed, depending on whether you use open-cell Sealection or closed-cell Heatlok. A 1,000-square-foot attic with a 7-inch open-cell application typically lands around $2,300 to $3,800. Closed-cell roof deck work is more, often $4,000 to $8,000, because the material costs more per board foot and the prep is more involved.
- Open-cell (Sealection): $1.10 to $1.80 per board foot installed.
- Closed-cell (Heatlok HFO): $2.20 to $3.50 per board foot installed.
- Rim joist spray: $900 to $2,200 for most Glendale homes, depending on joist count and access.
- Removal and respray of failed Demilec foam: $3,000 to $9,000, driven by how much must come out and how hard it is to reach.
What moves the price: access, how much prep is needed for old or damp framing, and whether existing foam has to come out first. We’ll put the exact number in writing before any work starts. Call (747) 246-7237 and we’ll walk your property, no charge, and tell you what you’re really looking at.
Why Glendale Homeowners Call Walt’s Insulation for Demilec Work
We’ve been doing insulation work since 2000, and we’ve been driving trucks through Glendale long enough that you’ve probably seen one parked near the Americana on Brand. We’re locally owned and owner-operated, with a published address and a license number. We’re not a franchise and not a call center. When you call at 2 a.m. because a raccoon ripped through your rim joist foam, a live person picks up. When our techs show up, they’re background-checked and uniformed, and they’ll be the same people we said we’d send.
If you already have a quote from someone else, bring it to us. We’ll give you a free second opinion on it, and we’ll tell you honestly whether it’s fair or whether you’re leaving money on the table. We also carry Reflectix for radiant barrier work, so if your Glendale attic needs both spray foam and reflective insulation, you’re not calling two companies. Seniors and veterans always get 10% off, no expiration date, because that’s just how we operate.
Walt Brenner started this company because he got tired of seeing homeowners overpay for undersized jobs. As he puts it: “Do it right the first time or you’ll be doing it twice, and the second time costs more.” That’s the whole philosophy, and we back it with the Done Right Promise on every Demilec job we touch.
FAQs
Yes. We routinely inspect, repair, and remove Demilec spray foam installed by other companies, including foam that was never installed correctly in the first place. We’re an independent Demilec service provider, not a manufacturer-authorized dealer, so we’ll give you an honest assessment of what’s failing and what’s not. Call (747) 246-7237 and we’ll take a look.
It depends on how the foam failed and what the repair involves, but most Demilec warranty claims are tied to the original installer’s workmanship, not what a later contractor does. What we fix, we stand behind under the Done Right Promise. If your installer is gone or unresponsive, we’ll help you document the original failure so you have a case if Demilec’s warranty still applies.
Most repair or respray jobs in Glendale can be scheduled within one to two weeks, and small rim joist or garage ceiling repairs can often happen within a few days. If you call (747) 246-7237, a live person answers and can usually tell you on the spot when we can get a tech to your neighborhood.
Repair is cheaper when the damage is isolated, like a separated rim joist section or one animal-tunneled corner. Full removal and replacement makes sense when the foam has widespread shrinkage, brittleness, or persistent odor. We’ll show you what we’re seeing and give you a straight recommendation, even when the smaller job is the right call. Estimates are free.
We do, including new ADUs and additions, which is a growing share of the work we see in Glendale. Closed-cell Heatlok HFO Pro is often the right choice for ADU roofs and walls because of the moisture resistance and the high R-value per inch. If you’re building in Glendale, get us involved before drywall goes up, and we’ll coordinate with your GC.
Written by Walt Brenner, Owner, Walt’s Insulation at Walt’s Insulation, serving Glendale and nearby areas.