GreenFiber Home Energy Audit in Union City: What to Know First
We provide independent GreenFiber home energy audit in Union City, typically completed same-day with results delivered before we leave. Most audits run between $280 and $550 depending on house size and test scope, and every job starts with a written price - no exceptions. This page is for Union City homeowners who’ve had GreenFiber cellulose blown into their attics or walls and need to know whether it’s performing as specified, or whether gaps in the installation are costing them on their PG&E bill. Call (650) 381-1512 to schedule, or text if that’s easier.
How GreenFiber Products Fail - and How We Fix Them
- GreenFiber All Borate loose-fill settling below labeled depth. The borate-treated cellulose in Union City’s older ranch homes near Alvarado-Niles Road was often blown to 10 inches in 2018 and now measures 6 inches - that’s an R-value drop from roughly R-38 to R-23. We measure actual depth against the bag spec, calculate the shortfall, and re-blow to true depth with a written target the crew hits before leaving.
- GreenFiber Sanctuary batt compression in knee walls and dropped soffits. Sanctuary batts are labeled R-30 but perform like R-15 when squeezed into 2×6 cavities that were framed tight to begin with. Our thermal camera picks up the cold strip every time. We pull the compressed batt, air-seal the cavity perimeter, and reinstall at full loft or switch to dense-pack if the geometry demands it.
- GreenFiber stabilized cellulose clumping from moisture cycling. Union City’s marine layer pushes humidity into vented attics; the acrylic binder in stabilized product can cake in corners near the bay-facing eaves. We map the clumps with borescope inspection, remove the affected material, seal the moisture path, and replace with fresh product that can actually dry.
- GreenFiber low-dust formula failing to fill behind narrow joist bays. The low-dust additive reduces airborne particles but increases static cling, so material bridges across 14.5-inch bays instead of falling to the heel. We see this in the tighter attics off Decoto Road. Our fix: dense-pack those bays with a hose extension and higher pressure, or switch to a different GreenFiber formulation for the problem zones.
- Top-plate bypasses left open during original GreenFiber installation. This isn’t a product failure - it’s an installation failure we find on roughly half the GreenFiber jobs we audit in Union City. The cellulose was blown over unsealed top plates, plumbing stacks, and electrical penetrations. Conditioned air streams through while the R-value on the bag looks fine. We seal every bypass with fire-rated caulk and foam, then re-test with the blower door to prove the leak is gone.
Our GreenFiber Home Energy Audit Process
- 1
Written price before we start. We scope the audit over the phone - house size, year built, known problem areas - and deliver a flat price. No one opens a truck until you’ve got the number in writing.
- 2
Blower-door baseline. We depressurize the house to -50 Pascals and record the CFM50 - the cubic feet per minute of air leakage at standard pressure. This single number tells us how much conditioned air your envelope is hemorrhaging before we touch anything.
- 3
Thermal imaging and borescope walk. Our FLIR camera maps cold spots; the borescope peers into wall cavities and behind kneewalls where GreenFiber was supposed to go. We photograph every anomaly.
- 4
Insulation depth and density check. We probe the GreenFiber in multiple attic locations, measure actual depth against the bag label, and flag settling, compression, or voids. 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.
- 5
Duct leakage test if indicated. When the thermal camera shows hot spots near duct runs in the attic, we pressurize the duct system and measure leakage to outside. A 15% leak rate means you’re conditioning your attic.
- 6
Written report with photo log and next-step pricing. You get the blower-door number, the thermal images, the borescope shots, and a plain-language summary with flat prices for any corrective work. No callback required.
Before
AfterWhat GreenFiber Home Energy Audit Costs in Union City
| Audit Scope | Typical Range | What Moves the Price |
|---|---|---|
| Basic blower-door + thermal imaging | $280 - $380 | House under 1,800 sq ft, single HVAC zone |
| Standard audit with insulation mapping | $380 - $480 | 2,000-3,200 sq ft, multiple attic planes, knee walls |
| Full envelope audit with duct leakage test | $480 - $550 | Large or multi-story home, suspected duct issues, borescope work |
Price drivers: house size, number of attic access points, whether we need to move stored items to probe the GreenFiber, and whether duct testing is added. Every estimate is free, written, and valid for 30 days. Call (650) 381-1512 for yours.
Why Union City Homeowners Call Topside Attic Insulation Union City for GreenFiber Work
We’ve audited and corrected GreenFiber installations across Union City since 2016, from the post-war stock near the old Southern Pacific yards to the newer builds climbing the hills toward the San Mateo Bridge. Wes Okafor runs every crew with the same standard he learned running jobs across the East Bay: seal first, then insulate, then prove it with a blower-door number. Our 365-Day Done Right Promise applies to any corrective work we perform after the audit. We also service Reflectix radiant barrier systems, so if your audit reveals multiple insulation types working against each other, we can address the whole assembly. Calls are answered by a live person 24/7, and you’ll get a text when your technician is en route with a name and photo.
FAQs
No. GreenFiber’s product warranty covers manufacturing defects, not diagnostic inspection. As an independent GreenFiber service provider, we perform non-destructive testing - blower door, thermal imaging, depth probing - that doesn’t alter the material or trigger warranty exclusions. If we find a product defect, we document it so you can file directly with the manufacturer. Call (650) 381-1512 to schedule an audit that protects your coverage.
Yes. We source GreenFiber All Borate, Sanctuary, and stabilized formulations through standard distribution channels - no proprietary lock-in. If your original installation used a discontinued line, we’ll match the R-value and density spec with the closest current product and note the substitution in your written report. We also carry Owens Corning, Johns Manville, Knauf, and Rockwool if a hybrid approach makes more sense for your assembly.
Replacement is warranted when the material is moisture-damaged, heavily compacted beyond recovery, or contaminated. Repair - targeted air sealing plus supplemental blowing - is usually sufficient for settling, thin spots, or bypass-related underperformance. Our audit gives you the blower-door number and thermal images to make that call with actual data, not a sales pitch. Most Union City homes we audit need correction, not replacement.
Most Union City appointments are available within 48 hours, and we carry enough test equipment to complete same-day diagnostics on standard audits. Duct leakage testing requires a second technician and may need 24-hour scheduling. Call (650) 381-1512 or text - we confirm within the hour during business hours.
A printed blower-door report with before-and-after numbers if corrective work is performed; thermal images with temperature annotations; borescope photos of cavity conditions; a written scope with flat pricing for any recommended work; and a photo log of the attic floor before and after any corrections. Everything is yours to keep, share with PG&E for rebate documentation, or take to another contractor for a second opinion - which we’ll also provide free if you bring us someone else’s quote.
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.