Demilec Spray Foam Insulation in Tustin: What to Know First
We provide independent Demilec spray foam insulation in Tustin, typically completing jobs same-day or next-day with a written price before any work starts. Most Demilec spray foam jobs in Tustin run between $2,800 and $6,500 depending on open-cell versus closed-cell, square footage, and whether we’re treating an attic, roof deck, or rim joist. This page is for homeowners who already have Demilec foam in their Tustin home and need repair, replacement, or new installation - or who are comparing Demilec against other spray foam brands and want specifics from a crew that works with it regularly. Call (657) 286-7673 for a free estimate with a written scope.
How Demilec Products Fail - and How We Fix Them
- Demilec Heatlok XT closed-cell separation from roof decking in Tustin’s hot-sun cycles. The XT line’s high R-value per inch - R-7 at full thickness - can delaminate from plywood roof decks when attic temperatures spike past 140°F in summer, which happens regularly in Tustin Legacy homes with dark shingles and limited soffit ventilation. We find this by cutting inspection ports and probing with a putty knife; our fix is full removal of the separated section, reconditioning the deck with a compatible primer, and reapplication to manufacturer density specs. We document the before-and-after adhesion with a pull-test reading in pounds per square inch.
- Demilec Sealection 500 open-cell shrinkage in wall cavities of pre-1990 Tustin homes. Sealection 500 is a light-density open-cell product that can pull away from stud bays by 1/4 to 1/2 inch if applied below the manufacturer’s recommended substrate temperature of 65°F, or if the A-side and B-side ratios drift during installation. We see this most in unconditioned garage conversions in Old Town Tustin where the original contractor rushed the job in cool morning temps. Our fix is selective removal, cavity re-prep, and reapplication with real-time yield monitoring - we track board feet per set to catch ratio problems before they set.
- Demilec Heatlok HFO High Lift off-gassing and odor persistence. The HFO blowing-agent version of Heatlok can retain a faint amine odor for weeks if the applicator exceeded the maximum pass thickness of 2 inches per lift, trapping unreacted iso in the core. Tustin homeowners with acute HVAC return paths near treated spaces notice this first. We diagnose with core samples at multiple depths; remediation involves scarifying the surface to expose the trapped layer, forced ventilation, and in persistent cases, removal and reapplication with proper lift sequencing.
- Demilec Agribalance shrinkage and cracking in crawl space rim joists. Agribalance, the bio-based open-cell line, can develop surface fissures when applied to damp rim joists in Tustin’s older homes near Peters Canyon, where seasonal groundwater wicks into sill plates. The foam itself isn’t failed - the substrate was wet. We fix this by completing our standard air-sealing protocol first: drying the joist with targeted heat, applying a flash coat of closed-cell as a moisture break, then finishing with Agribalance or switching to Heatlok XT if moisture remains borderline. Seal the leaks first. Then insulate. The R-value on the bag means nothing if conditioned air is moving through the gap around that recessed can.
- Demilec spray foam compromised by rodent nesting and urine saturation. In Tustin attics with prior squirrel or roof rat activity - common near the Tustin Hills - open-cell Demilec foam becomes a nesting substrate and absorbs urine, creating odor and air quality issues. Closed-cell is less vulnerable but not immune at cut edges. We remove the contaminated foam entirely, perform full attic cleaning and rodent proofing as a separate scope, then reapply with a borate-treated open-cell or switch to closed-cell depending on the homeowner’s preference and budget. The photo record shows exactly what came out and what went back in.
Our Demilec Spray Foam Insulation Process
- 1
Call and scheduling. A live person answers, or you can text. We book a window, send a text when Wes or his technician is en route, and arrive with a Haven Standard written scope template.
- 2
Blower-door test and thermal imaging. We pressurize the house to 50 pascals and record CFM50 - the baseline. Then we run a FLIR scan to find thermal bypasses the foam was supposed to stop but isn’t. In Tustin Legacy homes, we often find the top plates of interior walls still leaking because the original foam installer skipped them.
- 3
Diagnosis and parts decision. We identify the Demilec line in place - Heatlok XT, Sealection 500, Heatlok HFO, or Agribalance - and determine whether repair, selective removal, or full replacement is warranted. For replacement, we source OEM Demilec material or, with homeowner approval, specify an equivalent from Icynene or Johns Manville if Demilec lead times are long. We never lock you into a single brand.
- 4
Air sealing first, then foam. Every penetration, can light, top plate, and duct boot gets sealed with compatible sealant before any new foam touches the substrate. This is non-negotiable under our Haven Standard.
- 5
Application and real-time monitoring. We apply to manufacturer specs - temperature, humidity, substrate moisture, lift thickness, and yield tracking. For closed-cell, we confirm density with in-place core samples.
- 6
Post-work verification and documentation. We rerun the blower-door test and provide the before-and-after CFM50 numbers, thermal images, a written R-value report, and a Documented Photo Record. The 365-Day Done Right Promise begins when you sign the completion sheet.
Before
AfterWhat Demilec Spray Foam Insulation Costs in Tustin
| Job Type | Typical Range in Tustin | What Moves Price |
|---|---|---|
| Open-cell spray foam, attic (1,200 sq ft) | $2,800 - $4,200 | Thickness (5.5″ vs 7″), access difficulty, existing removal |
| Closed-cell spray foam, roof deck (1,200 sq ft) | $4,500 - $6,500 | Lift count, deck condition, need for primer |
| Rim joist, closed-cell (typical crawl) | $1,800 - $3,200 | Linear feet, moisture remediation, rodent damage |
| Demilec removal and replacement | Add 40-60% to above | Depth of foam, disposal volume, substrate repair |
| Spot repair (localized failure) | $650 - $1,400 | Area size, accessibility, match to existing foam |
These are real ranges from jobs we’ve completed in Tustin and nearby Orange County cities - not teaser prices. The written price you receive before any work starts includes material, labor, disposal, and the Documented Photo Record. No line-item surprises. Call (657) 286-7673 for an exact quote; estimates are free.
Why Tustin Homeowners Call Topside Attic Insulation Tustin for Demilec Work
We’re an independent Demilec service provider - not affiliated with or authorized by the manufacturer - which means we work with what performs, not what we’re contractually pushed to sell. Wes Okafor and his crew have handled Demilec foam in Tustin since the first Heatlok XT jobs went into Tustin Legacy redevelopments in the late 2010s. We also carry Reflectix and other brands, so if Demilec isn’t the right fit for your specific assembly, we’ll say so and specify something that is. Every job gets the Haven Standard: written price first, blower-door numbers where applicable, photo record at completion, and the 365-Day Done Right Promise in writing. Calls are answered by a live person 24/7. Background-checked, uniformed technicians. No voicemail loops.
FAQs
Demilec’s original installation warranty typically requires that work be performed by a Demilec-certified installer, which we are not - we’re independent. However, our 365-Day Done Right Promise covers our workmanship and materials regardless, and we use manufacturer-specified application procedures so the foam performs as designed. For warranty-sensitive situations, we document every step so you have evidence if a future dispute arises. Call (657) 286-7673 and we’ll review your specific installation paperwork.
Properly applied Demilec closed-cell foam can remain effective for 30-plus years; open-cell, 20-plus. In Tustin, premature failure is almost always an installation problem - wrong lift thickness, skipped air sealing, or application in unsuitable substrate conditions - not a material defect. We find the cause so the replacement lasts. Call for a free inspection and we’ll show you what failed and why.
Spot repairs run $650-$1,400; full removal and replacement adds 40-60% to new-install pricing. Repair makes sense for localized failures with sound surrounding foam. Replacement is the better value when the failure pattern is widespread, the original application was substandard, or you’re planning to sell and want clean documentation. We quote both paths when feasible. Call (657) 286-7673 for a written comparison.
Same-day or next-day for most calls. Emergency situations - active water intrusion through failed roof-deck foam, or odor issues affecting occupancy - get priority scheduling. We serve all Tustin neighborhoods including Tustin Legacy, Old Town Tustin, and Tustin Hills. Text or call (657) 286-7673; a live person answers.
We don’t stock Demilec sets in our Tustin-area warehouse - two-part spray foam has a limited shelf life once temperature-cycled - but we maintain relationships with regional distributors and can typically source Heatlok XT, Sealection 500, or Heatlok HFO within 48 hours. For faster turnaround, we may specify equivalent-performance foam from Icynene or Johns Manville with your approval. We never leave a job open waiting on material.
Written by Wes Okafor, Owner, Topside Attic Insulation Tustin at Topside Attic Insulation Tustin, serving Tustin and nearby areas.