Demilec Home Energy Audit Nationwide

Demilec Home Energy Audit in Cupertino: What to Know First

We provide independent Demilec home energy audit in Cupertino, typically scheduling within 48 hours and completing the full diagnostic same day. Most audits run between $280 and $450 depending on house size and test complexity, and you’ll get a written scope with exact pricing before we start any follow-up work. This page is for Cupertino homeowners with Demilec open-cell or closed-cell spray foam who need to know whether their insulation is performing as specified, or whether gaps, shrinkage, or application errors are costing them on their PG&E bill. Call (831) 217-8521 to schedule or text us if you prefer.

Call (831) 217-8521

How Demilec Products Fail - and How We Find Them

Demilec makes quality foam, but application conditions and aging behavior in Cupertino’s dry-summer, mild-winter climate create specific failure patterns our blower-door and thermal imaging work catches. Here’s what we document on actual Demilec jobs in the field:

• Heatlok HFO Pro closed-cell shrinkage at stud bays. The HFO blowing agent can pull 2-4% during cure; in Cupertino’s older Rancho Rinconada tract homes with OSB sheathing, we’ve found gaps at the stud edge that show up as cold stripes on FLIR during morning cooldown. We map every bay, mark the deficient ones, and specify whether spot repair or full removal is warranted.
• Sealection 500 open-cell overspray into soffits blocking ventilation. This low-density foam expands aggressively; crews working fast in tight Cupertino attics sometimes fill soffit chutes meant for airflow. Our inspection checks every chute with a borescope, and we clear blockages before they create moisture problems in the roof deck.
• Demilec 500 open-cell dusting at low-application temperatures. When applied below manufacturer spec, the foam develops a friable surface that sheds particles into the living space. We test with a simple rub test and check HVAC returns for foam debris; if we find dusting, we document it for warranty discussion with your original installer.
• Heatlok XT adhesive failure on galvanized ductwork in Cupertino foothills homes. The older split-levels near Monta Vista and the foothills often have galvanized supply trunks in the attic; Heatlok XT can release from galvanized steel if surface prep was skipped. Our duct leakage test separates leakage at seams from leakage through failed foam adhesion.
• Missed top-plate gaps behind Demilec in “flash-and-batt” jobs. We see this in Cupertino additions from the 2015-2020 boom: two inches of Demilec closed-cell with fiberglass batts behind, but the top plate where the wall meets the ceiling plane never got sealed. The foam looks complete from below, yet the blower-door test reads 3,800 CFM50 or higher. We find these with pressure pan testing at each wall-ceiling junction.

Seal the leaks first. Insulation covers problems; it does not fix them.

Our Demilec Home Energy Audit Process

1. 1
   Call intake. A live person answers, 24/7. We ask your Demilec product line if you know it, house age, and whether you’re seeing high bills, uneven temperatures, or both. We schedule a two-hour window and text you when the technician is en route.
2. 2
   Visual and borescope inspection. We access the attic and crawl space, photographing all Demilec surfaces. We’re looking for color change (yellowing indicates UV exposure on open-cell), shrinkage gaps, and overspray into wrong cavities.
3. 3
   Blower-door test. We run a pressurization reading to establish your baseline CFM50, then use a smoke pencil and thermal imaging to locate the largest leakage paths. This tells us whether the Demilec is the problem or whether it was applied over unsealed bypasses.
4. 4
   Duct leakage test and pressure pan diagnostics. If your HVAC runs through the attic, we measure total duct leakage and identify whether Demilec-adjacent failures are contributing. Pressure pans at each top plate show which wall-ceiling joints are connected to outside.
5. 5
   Written report with exact repair scope and price. Under Haven Standard Clause 1, you get a flat price, written scope, and written warranty before anyone lifts a tool. The report includes all photos, blower-door numbers, and our recommendation on whether repair, spot remediation, or full removal makes sense.
6. 6
   Schedule or decline. No deposit required to book. If you have a competing quote, bring it; we offer a Free Second Opinion and will read it with you line by line.

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What Demilec Home Energy Audit Costs in Cupertino

Most Demilec home energy audits in Cupertino fall in these ranges:

What moves the price: house size over 3,500 square feet, multiple attic zones (common in Cupertino hills homes with additions), or accessibility issues requiring scaffolding. What doesn’t move it: the Demilec brand itself; we don’t upcharge for manufacturer-specific work. Every audit includes a Documented Photo Record. Call (831) 217-8521 for an exact quote; estimates are free.

Why Cupertino Homeowners Call Topside Attic Insulation Cupertino for Demilec Work

We’re an independent Demilec service provider, not a manufacturer affiliate, which means our diagnosis isn’t filtered by warranty department interests. Wes Okafor learned blower-door diagnostics at Olive-Harvey College before most South Bay contractors owned the equipment, and our crew has worked Demilec foam from the original Rancho Rinconada tract builds to custom homes in the Monta Vista foothills where the envelope complexity demands methodical testing.

Our 365-Day Done Right Promise applies to any remediation we perform, and we publish before-and-after blower-door numbers so you see the CFM50 drop in writing, not just a verbal “much better.” We also service Reflectix and other brands, so if your audit reveals that a different material suits your situation better, we’ll say so. Calls answered live, 24/7. Written price before any work starts, always.

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