Demilec Insulation Removal & Replacement in Fullerton: What to Know First
Demilec spray foam removal and replacement in Fullerton typically runs $2,800 to $7,500 depending on attic size, foam type, and whether we’re pulling out an open-cell or closed-cell application. Most Demilec removal jobs in Fullerton take one to three days from setup to final cleanup, and we handle the full replacement with the insulation that makes sense for your home. As an independent Demilec service provider, we’re not tied to the manufacturer’s sales pitch, so we tell you straight whether replacement foam, fiberglass, or another material fits your home better. If you’ve got Demilec foam that’s failed, pulled away from the decking, or trapped moisture against your roof sheathing, this page is for you. Call (657) 216-9948 and a real person answers, day or night.
Key Takeaways
- We’re an independent Demilec removal and replacement contractor in Fullerton, not a factory rep
- Most Demilec removals run $2,800 to $7,500, with free estimates and no trip charge in our service county
- We remove failed, moisture-damaged, or poorly installed Demilec foam and replace it with the right material for your home
- Every job is backed by our lifetime Done Right Promise
- Live person answers your call 24/7, including weekends
How Demilec Products Fail - and How We Fix Them
Demilec makes solid foam when it’s applied right. The problem is that “applied right” matters more with spray foam than with any other insulation type, and we’ve seen enough Fullerton attics to know exactly where things go wrong. Here’s what we run into most often with Demilec jobs.
- Heatlok HFO shrinkage off the sheathing. When the A and B sides aren’t mixed at the right temperature or ratio during installation, the foam can cure too fast and pull back from the roof deck within a season or two. You see thin cracks of daylight at the seams where the foam meets the framing. The fix is full removal of the affected section and replacement, not patching, because the adhesion is compromised across the whole lift. We inspect every bay before we quote so you know the scope.
- Open-cell Demilec (like the Sealection 500 series) holding moisture. Open-cell foam breathes, which works fine until a roof leak or condensation cycle saturates it. In Fullerton’s marine layer mornings, a roof that sweats can keep that foam damp for weeks. You get a musty smell in the house and dark staining at the soffit vents. We cut out the wet foam, inspect the decking beneath, and replace with either new open-cell with better ventilation management or a closed-cell product that won’t absorb moisture the same way.
- Off-ratio closed-cell that never fully cured. A Demilec Heatlok job applied too cold or with a clogged proportioner leaves foam that’s brittle and crumbly instead of firm. It never reaches its rated R-value and it sheds dust into the living space through light fixtures and gaps. Homeowners find a fine yellow-white powder on attic contents. The only honest fix is removing the affected material entirely and re-spraying with properly heated equipment, which we do daily.
- Vermiculite and old insulation mixed in under retrofitted Demilec. Fullerton has plenty of 1950s and 1960s ranch homes where someone sprayed Demilec over old loose-fill or vermiculite without removing it first. The foam bonds to the top layer only, trapping the old material underneath. We remove the foam, then run full extraction on whatever’s below. If vermiculite is present, we treat it with the caution it deserves and recommend testing before any disturbance.
- Rodent damage through sprayed foam. Rats and squirrels don’t eat Demilec foam, but they tunnel through it. Fullerton’s older neighborhoods near the Fullerton Arboretum have mature trees and active rodent populations, and we’ve pulled foam out of attics that looked like Swiss cheese from squirrel traffic. The fix is removal, rodent proofing at every entry point, then fresh insulation. Patching never holds because the animals already know the route.
Our Demilec Insulation Removal & Replacement Process
Here’s how a typical Demilec removal goes when you call us in Fullerton. No surprises, no vague timelines.
- 1
Call and talk to a person. You reach Walt’s Insulation directly, day or night. We ask a few questions about your attic, your foam type if you know it, and what you’re seeing. Then we schedule a visit at a time that works for you.
- 2
We inspect the attic and identify the failure. Our technician walks the entire space, checks adhesion, moisture levels, and looks for the specific failure mode. We document everything and explain it in plain English, with photos if you want them.
- 3
We give you a written price. You get a firm number before we start. No vague estimates, no “we’ll see once we get in there.” If you’ve got another written estimate, bring it, and we’ll give you a free second opinion on it.
- 4
Removal day. We seal off the work area, run HEPA filtration, and remove the Demilec foam down to the decking or drywall. We bag and haul everything. If we find vermiculite, we stop and work with you on safe handling before proceeding.
- 5
Replacement. We install the insulation that fits your home and budget. Whether that’s new foam, blown-in fiberglass, or something else, we’re brand-flexible because we install Owens Corning, Rockwool, Johns Manville, Knauf, CertainTeed, and more. We’re not tied to one manufacturer’s line.
- 6
Final walkthrough and the Done Right Promise. We show you the finished job, walk the attic with you if you’re comfortable, and explain the work. Every job carries our lifetime workmanship guarantee. If it’s not done right, we make it right. That’s the promise, and we’re the ones who have to stand behind it.
What Demilec Insulation Removal & Replacement Costs in Fullerton
Here’s honest pricing for the Demilec removal scenarios we handle most often in Fullerton. These are real ranges based on the jobs we’ve done in this city, not national averages pulled from a database.
| Job | Typical Range | What Moves the Price |
|---|---|---|
| Partial Demilec removal (single bay or section) | $800 – $1,800 | Foam depth, access, disposal fees |
| Full attic Demilec foam removal, 1,200 sq ft | $2,800 – $4,800 | Open-cell vs closed-cell, foam thickness, how much is stuck to the decking |
| Full attic Demilec removal + new insulation replacement | $4,500 – $7,500 | Replacement material (fiberglass is less; new closed-cell foam is more), air sealing scope |
| Rodent-damaged Demilec removal + proofing + replacement | $5,000 – $8,500 | Number of entry points, damage extent, attic size |
| Vermiculite-involved removal with Demilec overlay | $4,000 – $9,000+ | Testing requirements, abatement protocols, disposal |
What moves the number most is how stuck the foam is. Closed-cell Demilec that’s properly cured is difficult to remove from roof decking and takes longer than open-cell. We always give you a fixed written price before work starts, and if you’re a senior or veteran, you get 10% off permanently. That’s not a coupon; it’s how we do business. Call (657) 216-9948 for an exact quote on your attic.
Why Fullerton Homeowners Call Walt’s Insulation for Demilec Work
Fullerton homeowners have plenty of insulation contractors to choose from. They call us for Demilec work because we’ve been doing this since 2000, and we’ve spent those years earning the right to be “the one down the road” you can actually rely on.
We’re locally owned and owner-operated, with a published address and license number. Not a franchise. Not a call center. When you call, a real person answers. At 2 PM or 2 AM, you get a human. Our technicians are background-checked and uniformed, so you know exactly who’s walking into your house. And unlike a manufacturer’s authorized installer who has to push one brand, we’re independent. If new Demilec foam makes sense for your Fullerton home, we’ll say so. If Reflectix radiant barrier or blown-in Owens Corning is the smarter play, we’ll tell you that too. Walt Brenner built this company on straight answers, and he still answers the phone more often than not. No upsells, no scare tactics, just an honest look at what your attic needs and a clean job when it’s done.
Every Demilec removal and replacement we do is backed by the Done Right Promise. If it’s not done right, we make it right. No runaround, no fine print. That’s why Fullerton keeps calling us back and why most of our attic work comes from neighbor referrals.
FAQs
For failed spray foam, replacement is almost always the right call. Demilec foam that’s pulled away from the decking, saturated with moisture, or turned brittle doesn’t repair well. Patching looks cheaper on paper but doesn’t fix the underlying adhesion or moisture problem, so you pay twice. Call (657) 216-9948 and we’ll assess your attic free in your county. No trip charge.
We can often start removal the same day or next day, depending on our schedule and the scope of work. Full removal and replacement on a typical Fullerton attic runs one to three days total. If you have an emergency situation like wet foam leaking through a ceiling, call us and we’ll prioritize your job.
Demilec’s manufacturer warranty typically covers the foam itself, not the labor to remove and replace it, and many warranties transfer poorly or have already lapsed by the time homeowners call us. Since we’re an independent Demilec service provider, we don’t file warranty claims on your behalf. We do back our work with the lifetime Done Right Promise, which covers our labor and materials. If it’s not done right, we make it right.
Yes. We install products from Owens Corning, Rockwool, Johns Manville, Knauf, CertainTeed, Icynene, and GreenFiber, along with Reflectix radiant barriers where they make sense. We recommend the material that works best for your Fullerton home’s construction, climate, and budget. We’re not locked into any single manufacturer.
We stock the common materials we use daily and can order anything unusual within a few days from local Southern California distributors. If you need new foam sprayed, we schedule that based on weather and our crews, typically within a week of your approval in Fullerton. Call us for current scheduling if your project is time-sensitive, and we’ll give you a straight answer on when we can get it done.
Need Demilec Insulation That Doesn’t Hold Up Removed and Replaced in Fullerton?
Call (657) 216-9948 and talk to a real person about your attic today. We’ll schedule a visit, walk your attic, and give you an honest written estimate with no pressure. Free second opinion on any written estimate you already have, no trip charge inside the service county, and 10% off for seniors and veterans, always. You’ll get a straight answer, a clean job, and the Done Right Promise behind it. We do the job right the first time, because we’re the ones who have to stand behind it.
Written by Walt Brenner, Owner, Walt’s Insulation at Walt’s Insulation, serving Fullerton and nearby areas.