Demilec Spray Foam Insulation in Pomona: What to Know First
We provide independent Demilec spray foam insulation service in Pomona, typically completing open-cell and closed-cell jobs within one to two days of your written approval. Most residential spray foam projects in Pomona run between $2,800 and $7,500 depending on cavity depth, square footage, and whether we’re treating an attic roof deck, wall assembly, or rim joist band. Call (562) 242-7569 for a free estimate with a written price before any work starts.
This page is for homeowners in Pomona, Claremont, La Verne, and surrounding areas who already have Demilec foam in their walls or attic and need service, retrofit, or replacement. We are not affiliated with or authorized by Demilec; we are an independent Demilec service provider with hands-on experience across the product lines that were installed in local homes during the 2012-2019 building boom.
How Demilec Products Fail - and How We Fix Them
- Heatlok HFO High Lift shrinkage in vented attics. Heatlok HFO, a closed-cell formulation popular in Pomona new construction during the mid-2010s, can pull away from rafter bays when seasonal temperature swings exceed 40 degrees, which they regularly do here between August afternoons and January mornings. We cut back the separated foam, recondition the substrate with a primer compatible with HFO chemistry, and reinstall with a lift schedule that accounts for the Inland Empire’s diurnal temperature swing.
- Heatlok XT adhesive failure on OSB roof decks above west-facing garages. The XT line’s aggressive R-value per inch came with a narrower application-temperature window than installers realized. In Pomona, where garage ceiling cavities over unconditioned space can reach 140°F before the foam cures, we’ve found delamination at the foam-wood interface. We remove the failed section, map the moisture drive with a thermal imager, and reapply only after verifying the deck moisture content is below 19 percent.
- Demilec open-cell water absorption in crawl space rim joists. Open-cell foam was sometimes used below grade in early 2010s Pomona tract homes because it was cheaper per board foot. It absorbs bulk water like a sponge. We excavate the saturated foam, dry the cavity with directed airflow, and replace with closed-cell at 2 inches minimum to meet the vapor retarder threshold.
- APH-LT low-temp formulation off-gassing in conditioned attic assemblies. The APH-LT line was marketed for cool-weather application, but in Pomona’s shoulder seasons, crews sometimes used it in enclosed attics with marginal ventilation. The result is a persistent amine odor that outlasts the normal 24-72 hour cure window. We identify the affected bays with a portable VOC meter, remove and refoam with a standard-cure formulation applied during adequate attic ventilation.
- Sealant Pro hybrid foam cracking at top plate transitions. This open-cell hybrid was sprayed at perimeter wall-to-ceiling joints in some Ganesha Park-area ranches. The differential movement between truss lift and rigid foam creates stress cracks at the boundary. We router out the cracked material, install a backer rod for strain relief, and refoam with a more flexible open-cell product rated for the joint movement we measure on site.
Our Demilec Spray Foam Insulation Process
- 1
Call and scope. A live person answers 24/7. We schedule a site visit, not a phone guess.
- 2
Blower-door test and thermal imaging. We pressurize the house to measure CFM50, then run a thermal scan to locate where Demilec foam has failed, shrunk, or was never properly applied. You get the before number in writing.
- 3
Written price and material spec. We specify OEM Demilec replacement foam or, when appropriate, a compatible alternative from Icynene or Johns Manville that matches the original thermal performance without voiding adjacent warranty coverage. The price is flat; the scope is written.
- 4
Air sealing before foam. Top plates, can lights, penetrations - sealed first. Seal the leaks first. The insulation is just the last layer of the answer.
- 5
Application and documentation. We photograph every bay, record foam thickness and pass count, and run a post-installation blower-door test. You receive the after number, the photo record, and the written warranty before the crew leaves.
- 6
365-Day Done Right Promise follow-up. We call at 30 days to confirm no odor, no shrinkage, no callback needed.
Before
AfterWhat Demilec Spray Foam Insulation Costs in Pomona
Most Demilec spray foam jobs in Pomona fall in these ranges based on what we’ve priced in the last 18 months:
- Open-cell attic roof deck (1,200 sq ft): $3,200-$4,800
- Closed-cell garage ceiling (400 sq ft): $2,800-$3,600
- Rim joist band replacement, crawl space (linear ft): $45-$65 per foot
- Whole-house open-cell wall retrofit (2,000 sq ft home): $5,500-$7,500
- Demilec removal and refoam (add 40-60% for labor and disposal): priced per job after inspection
What moves the price: cavity accessibility, existing foam removal requirements, whether the substrate needs moisture remediation, and lift height for roof decks over 8/12 pitch. We also service Reflectix radiant barrier systems when they’re part of the same assembly. Call (562) 242-7569 for an exact quote - estimates are free, and the price we write is the price you pay.
Why Pomona Homeowners Call Topside Attic Insulation Pomona for Demilec Work
We’ve sealed and insulated over 9,000 homes since 2016, and a measurable subset of those were Demilec foam jobs that another contractor walked away from. Wes Okafor, who picked up his air-sealing fundamentals at Richard J. Daley College before California codes made it standard, still runs a blower-door test on every applicable job so the R-value on paper matches what the house actually performs. Our technicians are background-checked and uniformed; you get a name and a text when they’re en route. Under Haven Standard, every job carries a written scope, a written warranty, and our 365-Day Done Right Promise. If it’s not done right, we make it right. No voicemail loops, no callback windows measured in business days.
FAQs
Demilec’s material warranty covers manufacturing defects, not installation errors, and it does not require factory-authorized service for the material portion to remain valid. Our work carries its own 365-Day Done Right Promise for labor and application. Call (562) 242-7569 if you have a specific warranty document you’d like us to review with you.
We source OEM Demilec product when the job spec calls for matched chemistry, particularly for repairs to Heatlok HFO or XT where thermal expansion coefficients need to align. For full removals and refoams, we may recommend compatible alternatives from Icynene or Johns Manville that meet or exceed the original R-value and vapor retarder specs. We never lock you into a proprietary product.
Repair is viable when the failure is localized, the substrate is sound, and a thermal scan shows the surrounding foam maintains continuous contact with the cavity. Full replacement is necessary when moisture has degraded the foam structure, when shrinkage exceeds 10 percent of the original thickness, or when the original application was below code minimum depth. We give you the scan data and our recommendation; you decide.
Most residential repairs are done in one day; full attic or whole-house refoams typically take two days including setup, application, and cure time before we run the post-installation blower-door test. We do not rush cure chemistry to hit a schedule. Call (562) 242-7569 for current availability - a live person answers.
You get a written scope of work, before-and-after blower-door readings when applicable, a Documented Photo Record of every cavity treated, and a written warranty under our 365-Day Done Right Promise. This is Haven Standard: you know what leaving looks like before we arrive.
Written by Wes Okafor, Owner, Topside Attic Insulation Pomona at Topside Attic Insulation Pomona, serving Pomona and nearby areas.