Demilec Insulation Removal & Replacement Nationwide

Demilec Insulation Removal & Replacement in Palo Alto: What to Know First

We provide independent Demilec insulation removal and replacement in Palo Alto, with most jobs completed in one to two days and a written price delivered before any work starts. As an independent Demilec service provider, we’re not affiliated with or authorized by Demilec - we work on what we find, document what we do, and guarantee the result. Most Palo Alto homeowners who call us are dealing with Demilec open-cell or closed-cell spray foam that’s failed to bond, degraded from rodent activity, or was installed over an unsealed attic floor that’s now trapping moisture. Call (650) 352-3577 for a free estimate with a written scope and upfront price.

Call (650) 352-3577

How Demilec Products Fail - and How We Fix Them

• Demilec Heatlok HFO Pro closed-cell separation from substrate. We see this in Palo Alto ranch homes near Midtown where roof decks were installed in morning marine-layer conditions without adequate surface temperature. The foam cures with a chalky, delaminated skin that flakes off in sheets. We cut back to sound substrate, recondition the surface with controlled heating, and reapply - but only after we’ve sealed the top plates and can-light penetrations that caused the thermal bypass in the first place.
• Demilec Sealection 500 open-cell shrinkage at stud bays. This 0.5-lb density foam can pull away from framing members after 7-10 years, especially in south-facing walls that cycle through Palo Alto’s wide diurnal temperature swings. The gap looks minor but creates a convection highway. We remove the shrunken material with controlled grinding, verify the cavity is dry with a moisture meter, and replace with new open-cell or dense-pack cellulose depending on the assembly and the owner’s preference.
• Demilec Heatlok XT rodent saturation and odor lock-in. Closed-cell foam is not rodent-proof - it’s rodent-resistant until it isn’t. Once mice or roof rats nest against Heatlok XT, the oil-based chemistry absorbs urine and holds it. Surface cleaning won’t fix it. We remove the contaminated foam in full lifts, treat the substrate with an enzymatic cleaner, and replace only after we’ve installed exclusion screening and sealed all penetration points. The photo record shows before, during, and after.
• Demilec Sealection Agribalance overspray onto electrical and HVAC components. This bio-based line was popular in green-built Palo Alto homes from 2012-2018. Overspray onto recessed can housings or flex duct creates a fire hazard and violates California Title 24. We carefully excise the foam from electrical components - power off, verified with a tick-tracer - and document the clearance restoration with photos for the homeowner’s inspector file.
• Demilec spray foam installed over unsealed attic floors, any series. This isn’t a product defect - it’s an installation error we correct weekly. Foam or blown insulation over a leaky attic floor is like wearing a sweater in the wind. The insulation has nowhere to work if the air is moving around it. We remove the compromised material, perform air sealing of all top plates, wire penetrations, and chimney chases, then reinstall. The blower-door test - a pressurization reading that shows, in one number, how much air your building envelope is losing - proves the difference.

Our Demilec Insulation Removal & Replacement Process

1. 1
   Call and scope. A live person answers 24/7. We schedule a site visit, and Wes Okafor or a senior tech arrives with a moisture meter, thermal camera, and inspection camera.
2. 2
   Written price before any work starts. We deliver a flat price, written scope, and written warranty - Haven Standard Clause 1 - before anyone lifts a tool. No exceptions.
3. 3
   Controlled removal. We section the failed Demilec foam with specialized cutting equipment, contain debris in sealed bags, and protect finished spaces with negative-air isolation where needed.
4. 4
   Substrate preparation and air sealing. The deck or framing is cleaned, dried, and verified. We seal every penetration with appropriate caulk, foam, or fire-rated sealant before any new insulation touches the surface.
5. 5
   Replacement and verification. New insulation - Demilec, Owens Corning, Johns Manville, Knauf, Rockwool, CertainTeed, Icynene, or GreenFiber, depending on the application and your preference - is installed to specified depth and R-value. On applicable jobs, we run a blower-door test and publish the before-and-after CFM50 reading.
6. 6
   Documented Photo Record and closeout. You receive photos of all work stages, the written pre- and post-installation report with R-value achieved and air-sealing locations, and the final blower-door result if tested. We perform a combustion-safety check on any gas appliance in the attic space before we leave - depressurizing a house without verifying flue draft first is how carbon monoxide problems start.

What Demilec Insulation Removal & Replacement Costs in Palo Alto

Most Demilec removal and replacement jobs in Palo Alto fall between $3,200 and $7,800, depending on what we find. A localized Heatlok XT removal in a 400-square-foot attic with clean substrate and straightforward reapplication runs toward the lower end. Full-agreement Sealection 500 removal across multiple wall assemblies, with associated drywall repair and dense-pack replacement, pushes higher.

What moves the price: square footage of foam to remove, accessibility (steep roof pitch or tight crawl space), contamination level (rodent-soaked foam requires hazmat-level handling), and whether the original installation skipped air sealing that now must be done correctly. We also service Reflectix and other brands if your assembly includes mixed materials.

Bring us any written estimate - we offer a Free Second Opinion on any written quote. Call (650) 352-3577 for a free estimate with exact pricing.

Why Palo Alto Homeowners Call Topside Attic Insulation Palo Alto for Demilec Work

We’ve sealed and insulated over 9,000 homes since 2016, every one with a written price before work started and a documented record when the crew left. Our 365-Day Done Right Promise means if it’s not done right, we make it right - backed by a written scope and written warranty delivered before anyone starts. Background-checked, uniformed technicians arrive on schedule; you get a named technician and a text when they’re on the way. We source materials from Demilec, Owens Corning, Johns Manville, Knauf, Rockwool, CertainTeed, Icynene, and GreenFiber - no proprietary lock-in, so you get what’s right for your assembly, not what we’re pushing. Wes Okafor grew up on Chicago’s South Side and learned the trade at Richard J. Daley College, where the building science curriculum ran heavy on air-sealing fundamentals before a single batt of insulation ever came up in class. That sequence - seal first, then insulate - still governs every job we run in Palo Alto.

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