Demilec Home Energy Audit in Union City: What to Know First
We provide independent Demilec home energy audit in Union City for homeowners who want to know exactly why their spray foam isn’t performing the way the spec sheet promised. Most audits are scheduled within 48 hours, and you’ll get a written price before we start any work - no exceptions. Call (650) 381-1512 to book a free estimate.
This page is for Union City homeowners with Demilec open-cell or closed-cell spray foam who are seeing uneven temperatures, rising PG&E bills, or moisture issues in their attic or walls. You might live in a 1960s ranch near Alvarado Adobe Park or a newer build along the Decoto corridor - either way, the marine climate here does specific things to Demilec foam that a generic energy audit won’t catch.
How Demilec Products Fail - and How We Fix Them
- Demilec SEALECTION 500 open-cell shrinkage at top plates. In Union City’s humidity cycles - fog rolling in off the Bay, then dry Santa Ana spells - SEALECTION 500 can pull away from framing members at the attic perimeter. We find this with thermal imaging, then cut back the failed foam, seal the gap with compatible sealant, and re-apply to manufacturer density. The fix is worthless if you don’t seal the air bypass first, which is why we blower-door before and after.
- Demilec Heatlok XT closed-cell off-ratio curing in crawl spaces. When the A and B components don’t mix clean - common in tight crawl spaces where hose length creates pressure drop - you get a tacky, underperforming skin that traps moisture against rim joists. We core-sample to check density, remove the failed material, and re-apply with heated hose management. Wes Okafor has seen this exact failure in half a dozen Union City homes built between 2015 and 2019.
- Demilec Heatlok HFO Ultra thermal drift in conditioned attics. The HFO blowing agent is more environmentally stable, but early batches in California had inconsistent lambda values that degraded faster than spec in our mild, humid winters. We measure actual R-value with a heat flow meter, compare to the labeled value, and document the gap for your records. If replacement is warranted, we show you the numbers.
- Demilec Agribalance shrinkage around can lights and penetrations. Agribalance is a solid product, but its expansion profile doesn’t forgive rough electrical boxes or unsealed fixture housings. We see compressed, cracked foam around recessed lights in Union City homes where the original installer skipped pre-sealing. Our fix: remove the compromised foam, seal the penetration with fire-rated caulk and cover, then re-foam to proper thickness.
- Demilec SEALECTION Agri-Bond delamination from OSB roof sheathing. When roof decks hit dew point in our coastal climate - especially north-facing pitches that never fully dry - the bond line between foam and OSB can fail. We spot this with moisture meters and infrared, then address the ventilation path before touching the foam. Re-foaming over a wet deck just buys you the same problem in two years.
Our Demilec Home Energy Audit Process
- 1
Call and scheduling. A live person answers, 24/7. We book your Union City audit, confirm the Demilec product line if you know it, and send a text when your technician is en route - Haven Standard: Arrive on schedule.
- 2
Blower-door test. We depressurize the house to 50 Pascals and record CFM50 - the single number that tells us how much conditioned air is escaping. This is our baseline; everything after is measured against it.
- 3
Thermal imaging and moisture mapping. We scan every Demilec surface with a FLIR camera, flagging shrinkage gaps, delamination, and moisture intrusion. Core samples come out if density is in question.
- 4
Written scope and price. Before any work starts, you get a flat price, written scope, and written warranty - Haven Standard Clause 1. No surprises, no “we’ll see how it goes.”
- 5
Air sealing first, then repair. We seal top plates, can lights, and penetrations before touching the Demilec foam. The R-value on the bag is what the material does in a lab. The number on your blower-door report is what your house actually does - and those two figures are not always friends.
- 6
Final blower-door and photo record. We test again, print your before-and-after CFM50, and leave a documented photo log of the work. If we used OEM Demilec foam or a compatible aftermarket product, it’s noted in your file.
Before
AfterWhat Demilec Home Energy Audit Costs in Union City
Most Demilec home energy audits in Union City run between $275 and $550 for a single-family home under 2,500 square feet. Here’s what moves that number:
- Basic audit with blower-door and thermal imaging: $275-$375
- Audit plus core sampling for density verification: $375-$475
- Full diagnostic with duct leakage test and moisture mapping: $450-$550
- Remediation work (air sealing, foam repair, re-application): priced per written scope after audit
Larger homes in the hills above Union City, or properties with multiple Demilec applications (attic plus crawl plus walls), sit at the higher end. We also offer a Free Second Opinion on any written estimate you’ve already received - bring us their scope, we’ll read it with you. Call (650) 381-1512 for your exact number; estimates are free.
Why Union City Homeowners Call Topside Attic Insulation Union City for Demilec Work
We’re an independent Demilec service provider - not affiliated with or authorized by Demilec - which means we work for you, not the manufacturer. Our 365-Day Done Right Promise applies to every job, and we publish before-and-after blower-door numbers so you can verify the result yourself. We’ve sealed and insulated 9,000+ homes since 2016, and we source materials from Demilec, Icynene, Owens Corning, and others - no proprietary lock-in. If your Demilec system is beyond cost-effective repair, we’ll tell you, and we can spec Reflectix or another solution that fits your budget and performance goals. Background-checked, uniformed technicians. Written price before any work starts. Live person on the phone, always.
FAQs
No - Demilec’s warranty covers product defects, not independent inspection. However, warranty claims for material failure still require factory-authorized documentation of the original installation. We photograph and record everything we touch so you have evidence if a product claim is warranted. Call (650) 381-1512 and we’ll walk you through what’s in your file.
We can source OEM Demilec products when they’re the right choice, and we use quality-compatible aftermarket foams when they match or exceed the original spec. We never lock you into a single brand - our supplier list includes Demilec, Icynene, Johns Manville, and others. The written scope specifies exactly what goes in your walls or attic before work starts.
Replacement makes sense when the foam has degraded past 60% of labeled R-value, when moisture damage has compromised the substrate, or when multiple failure modes overlap (shrinkage plus delamination plus off-ratio curing). Repair works when the failure is isolated and the surrounding foam tests at spec. We give you both numbers and our recommendation - no pressure either way. Call for a free estimate.
Most audits are scheduled within 48 hours, and emergency situations - active moisture intrusion or visible foam degradation - get same-day priority. A live person answers calls 24/7, so you’re not waiting through a voicemail loop while your rim joist takes on water.
You get a printed blower-door report with before-and-after CFM50, a photo log of the work area, a written scope showing exactly what was done, and a written warranty under our 365-Day Done Right Promise. Haven Standard: Have it in writing. We don’t make you ask for this - it’s in your hand before the crew leaves.
Written by Wes Okafor, Owner & Lead Insulation Technician, Topside Attic Insulation Union City at Topside Attic Insulation Union City, serving Union City and nearby areas.