Demilec Insulation Removal & Replacement in Newport Beach: What to Know First
We provide independent Demilec insulation removal and replacement in Newport Beach, typically completing most jobs in one to two days with a written price delivered before any work starts. Most Demilec removal and replacement projects in this market run between $3,800 and $7,200 depending on attic size, contamination level, and whether the existing foam is open-cell (Heatlok HFO, Heatlok XT) or closed-cell (Demilec SEALECTION 500, Demilec Agribalance). This page is for Newport Beach homeowners who installed Demilec spray foam between 2010 and 2020 and are now dealing with odor issues, failed adhesion, or the need to reconfigure attic space after a roof or HVAC upgrade. Call (657) 261-8265 for a free written estimate with no work obligation.
How Demilec Products Fail - and How We Fix Them
- Heatlok XT open-cell odor retention in coastal humidity. The XT series uses a water-blown blowing agent that can trap moisture against roof decks in Newport Beach’s marine layer conditions. We’ve pulled Heatlok XT in Harbor View Hills and Corona del Mar where the foam had begun to off-gas a persistent sweet, chemical smell after five to seven years. Our fix: complete mechanical removal with oscillating multi-tools and wire brushes, then HEPA vacuum extraction before any replacement material goes in. We never encapsulate odorous foam; that just seals the problem inside.
- SEALECTION 500 closed-cell shrinkage at rafter interfaces. SEALECTION 500 is a 2.0 lb density closed-cell foam that can pull away from rafter edges during thermal cycling, especially where roof sheathing hits 140°F in summer. In Newport Beach, this shows up as dark gaps visible during attic inspections on homes above PCH. We remove the separated sections, re-prep the substrate with grinding and solvent cleaning, then reinstall with compatible closed-cell or transition to a hybrid system depending on the new design goal.
- Agribalance soy-based formulation degradation from rodent activity. Demilec marketed Agribalance as a renewable-content foam, but the soy oil component can attract rodents once the surface seal is compromised by chewing. We’ve found this in Balboa Peninsula cottages where roof rats have tunneled through Agribalance to nest. The fix isn’t spot repair; it’s full removal of contaminated sections, sanitization with enzyme treatment, and replacement with a non-organic foam or mineral wool in rodent-prone zones.
- Heatlok HFO incomplete cure in thick lift applications. Heatlok HFO, Demilec’s later-generation open-cell using hydrofluoroolefin blowing agents, can skin over before the core fully reacts when installers exceed recommended pass thickness. The result is a tacky, uncured interior that off-gasses for years. We encounter this in Newport Beach remodels where the original contractor chased speed over specification. Our removal protocol includes core sampling to verify cure depth before we quote; partial removal of undercured foam costs more than full removal of properly cured material because of the adhesive residue left behind.
- Demilec-to-substrate bond failure on dusty OSB or previously painted surfaces. Demilec’s installation guidelines require clean, dry, bare wood or masonry. In practice, many Newport Beach tract builds from the 2010s had OSB with mill glaze or residual drywall dust. The foam adheres initially, then releases in sheets during the first hot season. We see this in Eastbluff and Newport Coast installations. Our repair includes substrate preparation with grinding and primer application before replacement, documented in the photo record we deliver.
Our Demilec Insulation Removal & Replacement Process
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Site assessment and written price. We inspect the attic, identify the Demilec series, test for odor and adhesion, and deliver a flat written price before any work starts. Haven Standard Clause 1: no surprises.
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Blower-door baseline (when applicable). If the home has active HVAC and we’re replacing functional insulation with a new system, we run a blower-door test - a pressurization reading that shows, in one number, how much conditioned air the building envelope is losing. This establishes the performance benchmark.
- 3
Mechanical removal and HEPA extraction. We remove Demilec foam with oscillating tools, wire brushes, and controlled scraping, never chemical strippers that leave residue. All debris is HEPA-vacuumed and bagged for proper disposal. Open-cell Demilec generates more particulate volume than closed-cell; we size the extraction equipment accordingly.
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Substrate prep and air sealing. Before any replacement insulation, we seal top plates, can lights, and penetrations. Seal the leaks first. Then insulate. The R-value on the bag means nothing if the air is moving freely around it.
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Replacement installation and documentation. We install the specified replacement material - spray foam from Owens Corning, Johns Manville, Knauf, Icynene, or another named supplier; mineral wool; or blown cellulose - and provide a Documented Photo Record of the completed work. On applicable jobs, we run the after blower-door test and publish both numbers.
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Written warranty and 365-Day Done Right Promise. You receive the written scope, the photo record, and the warranty before we leave. If it’s not done right, we make it right.
Before
AfterWhat Demilec Insulation Removal & Replacement Costs in Newport Beach
Most Demilec removal and replacement jobs in Newport Beach fall in these ranges:
- Partial removal (contaminated or failed section, under 400 sq ft): $3,800 - $5,400
- Full attic removal, open-cell Demilec (Heatlok XT, Heatlok HFO), replacement with blown cellulose: $4,600 - $6,800
- Full attic removal, closed-cell Demilec (SEALECTION 500), replacement with new closed-cell foam: $5,800 - $8,200
- Full removal with rodent decontamination and sanitization: add $1,200 - $2,400
- Hybrid system (foam + mineral wool in conditioned attic): $6,400 - $9,800
What moves the price: attic square footage, roof pitch (steeper = slower removal), whether the Demilec is open-cell or closed-cell, contamination level, and whether the substrate needs grinding or primer before replacement. We also provide a Free Second Opinion on any written estimate - bring us a competing quote and we’ll read it with you. Call (657) 261-8265 for a written price specific to your attic.
Why Newport Beach Homeowners Call Topside Attic Insulation Newport Beach for Demilec Work
We’ve removed Demilec from homes across Newport Beach - from the compact attics of Lido Isle to the sprawling conditioned spaces above Corona del Mar. Wes Okafor, our owner, learned the trade through the HVAC and Building Sciences program at Olive-Harvey College in Chicago and has spent well over a decade running blower-door tests on coastal Southern California homes. His crew has pulled permits and documented air-sealing results from the Balboa Peninsula to the hills above Corona del Mar.
We’re an independent Demilec service provider, not a factory-authorized dealer, which means we can source replacement materials from Owens Corning, Johns Manville, Knauf, Rockwool, CertainTeed, Icynene, Demilec, GreenFiber, or Reflectix - whatever fits the building science goal. Every job gets a written price first, a Documented Photo Record at completion, and the 365-Day Done Right Promise. Calls are answered by a live person, 24/7.
FAQs
The original Demilec installation warranty, typically 10 years on material and workmanship through the installing contractor, is already void if that contractor is out of business or if the failure stems from installation error. As an independent service provider, we do not extend Demilec’s original warranty, but we provide our own written warranty on removal and replacement work. Call (657) 261-8265 to review what coverage remains on your specific installation.
We can source current Demilec formulations, but exact batch matching of aged foam is not possible - foam yellows and oxidizes, and new material will contrast visually. Most Newport Beach homeowners use removal as an opportunity to upgrade to a newer chemistry (Heatlok HFO replaces older Heatlok XT, for example) or switch to a multi-layer system with better moisture management. We’ll explain the trade-offs in the written scope before you decide.
Localized adhesion failure on a small addition or isolated roof section can sometimes be cut back and re-foamed. Odor issues, widespread shrinkage, or rodent contamination always require full removal - spot repairs over compromised substrate fail within two years in our experience. We assess this during the initial inspection and tell you which path we’re quoting. Estimates are free; call (657) 261-8265.
Most Demilec removals in Newport Beach are scheduled within 5 to 10 business days of written estimate acceptance. Emergency situations - active roof leaks through failed foam, or severe odor affecting occupancy - can sometimes be expedited. You’ll get a named technician and a text when they’re on the way.
We bag all Demilec debris on-site and transport it to a waste facility licensed for polyurethane foam disposal. Closed-cell Demilec is not recyclable through standard municipal programs. We include disposal in our flat written price; you won’t see a separate dumpster or tipping fee. The Documented Photo Record shows before, during, and after conditions for your files.
Written by Wes Okafor, Owner, Topside Attic Insulation Newport Beach at Topside Attic Insulation Newport Beach, serving Newport Beach and nearby areas.