Demilec Home Energy Audit in Mountain View: What to Know First
We provide independent Demilec home energy audit in Mountain View, typically scheduled within 48 hours and completed in a single visit. Most audits run between $280 and $520 depending on home size and test scope, and you’ll get a written price before we start - no exceptions. This page is for Demilec owners in Mountain View who need to know whether their spray foam system is performing as installed, whether air leaks are undermining the R-value they paid for, and what the fix actually costs. Call (669) 259-0406 for a free estimate.
How Demilec Products Fail - and How We Fix Them
- Demilec SEALECTION 500 open-cell foam shrinkage at top plates. In Mountain View’s dry summer climate, we’ve seen SEALECTION 500 pull back 1/4 to 1/2 inch from framing members in attics above Rex Manor and Cuesta Park. The foam itself is fine; the bond failed. We cut back to sound substrate, re-apply with proper substrate conditioning, then verify with thermal imaging before we close up.
- Demilec Heatlok HFO High Lift closed-cell off-ratio curing. When the A and B components drift - usually from a worn mix manifold or temperature fluctuation in the rig - Heatlok HFO cures tacky or with a mottled density map. It still looks like foam, but the R-value drops and the vapor barrier performance is compromised. We core-sample suspect areas, document density with a written report, and remove and replace off-ratio sections rather than patch over them.
- Demilec 500 open-cell water absorption in crawl spaces. Open-cell below grade is a known risk in Mountain View’s clay-heavy soils around the San Antonio watershed. We’ve pulled saturated Demilec 500 from crawl spaces where the vapor retarder was omitted or punctured. Our fix: remove the water-damaged foam, install a proper 6-mil vapor barrier, then re-apply with closed-cell product specified for below-grade exposure.
- Demilec Heatlok XT rigid board delamination from HVAC ducts. Heatlok XT board stock, when applied to ductwork with the wrong adhesive or without mechanical fastening, separates at the joint. Conditioned air leaks into the attic before it reaches the register. We re-secure with proper mechanical fasteners and UL-181 approved adhesive, then pressure-test the duct system to confirm sealed.
- Demilec SEALECTION Agribalance density inconsistency in thick-lift applications. Agribalance is formulated for lifts up to 5.5 inches, but we’ve found installers in older Mountain View ranch homes - the Eichler-influenced stock off Middlefield - who pushed past that in one pass. The center cures soft, creating a thermal bypass. We remove the under-cured core and re-apply in proper lifts, with a core sample report for the homeowner’s file.
Our Demilec Home Energy Audit Process
- 1
Call and schedule. A live person answers. We ask square footage, year built, and what you’re seeing - hot rooms, high bills, musty attic smell. We give you a 2-hour arrival window and text when the tech is en route.
- 2
Visual and thermal inspection. Our tech walks the attic and crawl with a FLIR camera, looking for Demilec-specific tells: shrinkage gaps, off-ratio color variation, water staining, or delamination. We photograph everything.
- 3
Blower-door test. We depressurize the house to 50 pascals and measure CFM50 - the cubic feet per minute of air leakage at standard test pressure. This gives us one number that sums up every gap in the envelope, including any the Demilec was supposed to seal but didn’t.
- 4
Duct leakage test (if applicable). We pressurize the duct system and measure leakage to outside. Demilec-lined ducts can hide disconnects behind the foam; this finds them.
- 5
Written report and price. You get a documented photo record, the blower-door reading, thermal images with annotations, and a flat written price for any corrective work. No work starts without your signature on that price.
- 6
Correction and verification. If you proceed, we fix what we found, re-test the blower door, and hand you the before-and-after numbers. Seal the leaks first. The insulation has nowhere to go if the air does.
What Demilec Home Energy Audit Costs in Mountain View
| Service | Typical Range | What Moves the Price |
|---|---|---|
| Basic Demilec audit (blower door + visual) | $280 - $380 | Home size under 2,000 sq ft, single attic access |
| Full Demilec audit with thermal imaging | $380 - $520 | Multiple attic zones, crawl space, or duct leakage test added |
| Duct leakage test add-on | $120 - $180 | Number of HVAC systems, accessibility of plenum |
| Core sampling and density report | $85 - $140 per sample | Lab turnaround, number of suspect locations |
Homes in Mountain View’s older neighborhoods - the 1950s stock off Central Expressway, the Eichler courts - often need more access points cut, which adds labor. We tell you before we cut anything. Call (669) 259-0406 for a free estimate; the audit price is waived if you proceed with corrective work.
Why Mountain View Homeowners Call Topside Attic Insulation Mountain View for Demilec Work
We’ve been in Mountain View attics since 2016, and we’ve seen Demilec installed well and installed poorly. Wes Okafor, our owner, sequences every job the same way: air-seal every penetration at the attic floor before a single pound of insulation goes in, then hand the homeowner a written report with the pre- and post-job ACH50 figure. Our 365-Day Done Right Promise applies to all completed work. We also service Reflectix and other major brands, so if your audit reveals that Demilec isn’t the right product for your application, we’ll tell you straight and quote the alternative. Calls are answered by a live person, 24/7.
FAQs
No. As an independent Demilec service provider, our audit is non-destructive visual and instrumental inspection. We do not alter the foam during the audit itself. If we find an installation defect that falls under Demilec’s material warranty, we document it so you can file a claim with your original installer or Demilec directly. Call (669) 259-0406 to schedule - estimates are free.
The blower-door test tells you. A properly air-sealed Demilec job should show a significant reduction in CFM50 compared to pre-foam baseline. If your home still leaks like it did before the foam went in, the foam missed something or was applied over unsealed gaps. We see this in Mountain View’s rush jobs from the 2021-2023 building boom. We’ll show you the number and what it means.
Spot repair is usually cheaper if the failure is localized - shrinkage at top plates, a single off-ratio section, a water-damaged crawl space area. Full removal and re-application runs $4,200 to $7,800 in Mountain View for a typical 2,000 sq ft home. We only recommend full removal when the foam is systematically compromised or was the wrong product for the location. We’ll give you both prices and let you decide.
We typically schedule within 48 hours, and same-day is often available for suspected active water intrusion or significant air leakage. The audit itself takes 2 to 3 hours. You’ll have the written report and price the same day. Call (669) 259-0406 - a live person answers.
We do not stock Demilec product; we order to spec after the audit confirms what’s needed. Most Demilec materials arrive within 3 to 5 business days. For urgent air-sealing needs, we can interim-seal with compatible tape and sealant while we wait for the foam delivery. We also work with Reflectix and other brands if turnaround or application requirements make them the better fit.
Written by Wes Okafor, Owner & Lead Insulation Technician, Topside Attic Insulation Mountain View at Topside Attic Insulation Mountain View, serving Mountain View and nearby areas.