Demilec Home Energy Audit in Morgan Hill: What to Know First
We provide independent Demilec home energy audit in Morgan Hill, typically scheduled within 48 hours and completed in a single visit that runs two to four hours depending on home size. Most audits run between $280 and $550, and you’ll get a written scope with line-item pricing before any work starts - no exceptions. This page is for Morgan Hill homeowners who have Demilec spray foam or insulation in their building envelope and need to know whether it’s performing as specified, whether moisture has compromised the assembly, or whether the original install left gaps that are driving your PG&E bill. Call (669) 280-8103 to schedule or to get a free second opinion on another contractor’s written estimate.
How Demilec Products Fail - and How We Fix Them
- Heatlok HFO Pro shrinkage at rim joists. The high-pressure HFO blowing agent in Demilec’s closed-cell flagship can pull away from sill plates in the first two heating seasons, especially in Morgan Hill’s wide diurnal temperature swings where rim joists see 30°F deltas in a single day. We find this with thermal imaging, then cut back the failed section and reapply with a compatible transition primer - never caulk over shrinkage gaps, which traps vapor.
- Heatlok XT moisture trapping in crawl space encapsulations. Demilec’s 2.0 lb density closed cell is vapor-impermeable at 1 inch, but when applied to dirt-crawl stem walls without a proper drainage plane, it can wick groundwater through concrete pores and delaminate. In Morgan Hill’s older homes near downtown, we see this where seasonal creek drainage raises soil moisture. We remove the compromised foam, install a dimple mat drainage layer, then reapply - or switch to an open-cell strategy with a vapor retarder if the wall can’t be dried.
- Demilec SEALECTION 500 overspray into soffit vents. The low-pressure kit foam expands aggressively and can block intake ventilation when installers get careless at the eaves. We find this during blower-door testing when attic depressurization reveals no airflow through blocked bays. Our fix: surgical removal with a long reciprocating blade, then proper baffle installation before any replacement foam goes in.
- Demilec AgriThane off-gassing in agricultural-adjacent conversions. This agricultural-spec foam shows up in Morgan Hill’s converted outbuildings and ADUs where original owners cut costs. The higher biocide load can produce detectable amine blush in tight envelopes. We test with VOC screening during our energy audit, and if levels exceed CA Department of Public Health guidelines, we recommend full removal and replacement with a residential-spec alternative - not encapsulation, which doesn’t stop the source.
- Demilec open-cell (0.5 lb) wind-washing in vented attics. Demilec’s open-cell products are air-permeable; when installed against roof decking in a vented attic without an air barrier, Morgan Hill’s spring winds push conditioned air right through the matrix. Our blower-door test catches this as elevated duct leakage correlation - the HVAC is working harder because the envelope leaks through the insulation itself. We seal the top plates and install a proper air barrier before adding density.
Our Demilec Home Energy Audit Process
- 1
Call intake with live person. We ask for your Demilec product line if you know it, the install year, and any symptoms - musty smells, high bills, rooms that won’t hold temperature. We schedule within 48 hours, often same-week in Morgan Hill.
- 2
On-site blower-door test. We depressurize the house to 50 Pascals and record CFM50 - the single number that tells us how much air your envelope is losing. For Demilec homes, we pay special attention to whether the foam itself is the leakage path or just covering bigger gaps.
- 3
Thermal imaging and insulation inspection. Our FLIR camera finds Demilec shrinkage, delamination, and missed spots invisible to the eye. We document every anomaly with a geotagged photo.
- 4
Duct leakage test if indicated. When the blower-door numbers don’t match the utility bills, we run a duct blaster to isolate whether your HVAC distribution is the real energy thief.
- 5
Written scope with line-item pricing. Under Haven Standard Clause 1, you get a flat price, written scope, and written warranty before anyone lifts a tool. No “call for a quote” - the price is on the paper.
- 6
Execution with documented photo record. We seal every penetration first, then insulate. Before-and-after blower-door numbers go in your file. Seal the leaks first. The insulation just holds what you’ve already captured.
What Demilec Home Energy Audit Costs in Morgan Hill
Most Demilec home energy audits in Morgan Hill run $280-$550 for a single-family home under 3,000 square feet. Here’s how the price breaks:
- Base blower-door test with thermal imaging: $280-$350
- Add duct leakage testing: +$120-$180
- Whole-home multi-zone assessment with written remediation scope: $450-$550
- Remediation work (air sealing, spot foam removal/replacement): $1,800-$4,500 depending on access and square footage
What moves the price: crawl space access difficulty, number of thermal anomalies found, whether we need to bring in containment for removal work, and if the home has multiple HVAC zones requiring separate duct tests. We also service Reflectix radiant barrier systems where those were paired with original Demilec installs. Every estimate is free, and we honor our Free Second Opinion on any written estimate you’ve already received - bring us their scope, we’ll read it with you.
Why Morgan Hill Homeowners Call Topside Attic Insulation Morgan Hill for Demilec Work
Wes Okafor and our crew have logged Demilec jobs across Santa Clara County since 2016, from the ranch-style homes near Oakwood Avenue to the newer builds off East Main where spray foam was spec’d from the start. We’re independently owned and operated - not a Demilec authorized dealer, but an independent Demilec service provider with no proprietary product lock-in. Our materials come from Owens Corning, Johns Manville, Knauf, Rockwool, CertainTeed, Icynene, Demilec, and GreenFiber, so if your Demilec product needs replacement, we match the application to the right material, not the brand that pays us. Every job carries the 365-Day Done Right Promise, documented photo record, and before-and-after blower-door numbers where applicable. Calls are answered by a live person, 24/7.
FAQs
No - a diagnostic audit never voids warranty, though invasive sampling or removal work can if performed improperly. We document our methods with photos and written scope so any warranty claim you later file with Demilec is supported by third-party evidence, not contradicted by sloppy work. Call (669) 280-8103 and we’ll review your warranty terms before scheduling.
Yes, we source Demilec products through standard distribution channels for color and density matching on visible repairs. For hidden cavities, we often recommend compatible alternatives from Icynene or Johns Manville that perform identically at lower material cost - we’ll explain the trade-off in your written scope before you decide.
Removal is necessary when the foam is chemically compromised (amine blush, moisture saturation, or pest infestation) or when it was installed so poorly that retrofit sealing is impossible. Surface shrinkage and minor delamination are usually repairable. Our thermal imaging and moisture-meter readings during the audit give you the data to make that call - not a sales pitch. Call (669) 280-8103 for an exact assessment; estimates are free.
Audit appointments are typically available within 48 hours. Remediation scheduling depends on scope - spot air sealing and top-up foam often complete same-day, while full removal with reapplication requires containment setup and runs 2-4 days. We don’t book jobs we can’t start promptly; if our calendar is full, we’ll tell you honestly rather than leave you waiting.
Because spray foam is only as airtight as the substrate it’s applied to, and because Demilec’s open-cell products are not air barriers at all. In Morgan Hill’s vented attics, we’ve found original installers who sprayed open-cell against roof decking but never sealed the top plates below - so conditioned air dumps into the attic through the wall plates while the foam looks perfect from below. The blower-door test catches this exact failure mode; the fix is sealing the plates, not blaming the foam.
Written by Wes Okafor, Owner & Lead Insulation Technician, Topside Attic Insulation Morgan Hill at Topside Attic Insulation Morgan Hill, serving Morgan Hill and nearby areas.