GreenFiber Home Energy Audit in San Marcos: What to Know First
We provide independent GreenFiber home energy audit in San Marcos, typically completed same-day with written results delivered before we leave. Most audits run between $280 and $520 depending on home size and whether duct leakage testing is included. We do not start any work without a written price, and we do not ask you to call for a quote.
This page is for GreenFiber owners in San Marcos who want to know why their insulation isn’t performing the way the bag promised, and whether the problem is the material, the installation, or the air moving around it. If your GreenFiber cellulose was blown in over unsealed top plates or your San Marcos home still reads high on the blower-door test after “insulation,” we can show you exactly where the heat is going. Call (737) 337-8049 for a free estimate.
How GreenFiber Products Fail - and How We Fix Them
- GreenFiber All Borate loose-fill cellulose settling below labeled R-value in San Marcos attics. The product is specified at a settled density, but crews working fast in summer heat often under-blow, leaving pockets where the cellulose is 20-30% below the depth chart. We measure depth at ten points across the attic and compare to the GreenFiber coverage chart for your bag date. If it’s thin, we add to spec and re-document.
- GreenFiber Sanctuary blown-in wool-cotton blend absorbing roof-deck moisture in vented attics. This line is more hygroscopic than standard cellulose, and in San Marcos where afternoon humidity spikes after morning rain, it can hold moisture against the deck if ventilation is marginal. We check with a moisture meter at the sheathing, map the wet spots with thermal imaging, and either improve ventilation or recommend a different material for that zone.
- GreenFiber Low Dust settling into platform gaps around recessed can lights. The low-dust formulation flows differently than standard cellulose, and in the 2018-2021 production runs we see in San Marcos homes near the university corridor, it sometimes bridges over gaps instead of filling them. We pull it back, seal the can-light housings with fire-rated covers, then reinstall to proper density.
- GreenFiber stabilized cellulose failing to adhere in sloped cathedral ceilings. The adhesive-activated product needs specific humidity to set; San Marcos winter dry spells leave it loose on slopes over 45 degrees. We test adhesion with a probe, remove what didn’t take, and reapply with corrected water ratio or switch to dense-pack netting.
- GreenFiber installed over unsealed ductwork in conditioned attics. This isn’t a product defect, it’s a sequence error we see constantly: the cellulose covers leaky flex ducts, making them impossible to seal later without removing insulation. We always run a duct-blaster test first, seal what moves, then insulate. The R-value tells you how slow heat moves through the material - the blower-door number tells you whether any of that matters.
Our GreenFiber Home Energy Audit Process
- 1
Call and scheduling. A live person answers. We ask square footage, year built, and what you’re seeing - hot rooms, high bills, dust from vents. We schedule a two-hour window and text when the technician is en route.
- 2
Walkthrough and written price. The technician walks the home with you, notes the GreenFiber product line if visible, and delivers a written price before any testing begins. No work starts without it - Haven Standard Clause 1.
- 3
Blower-door test. We depressurize the house to 50 Pascals and record CFM50 - the single number showing how much conditioned air escapes through the envelope. This is our baseline.
- 4
Thermal imaging and insulation inspection. With the house under pressure, we scan with infrared to find air bypasses the GreenFiber is hiding. We probe depth, check for settled areas, and photograph condition.
- 5
Duct leakage test if indicated. We pressurize the duct system and measure leakage to outside. In San Marcos slab homes, duct runs through hot attics lose twice: the air leaks out, and the attic air leaks in around it.
- 6
Written report and next steps. You get the blower-door number, thermal images with annotations, insulation depth map, and a written scope with price if work is recommended. Photos are included, not available on request.
Before
AfterWhat GreenFiber Home Energy Audit Costs in San Marcos
| Service | Typical Range | What Moves It |
|---|---|---|
| Basic home energy audit (blower door + thermal imaging) | $280 - $380 | Home size under 2,500 sq ft, single HVAC zone |
| Full audit with insulation inspection and depth mapping | $340 - $460 | Attic access difficulty, multiple insulation types present |
| Audit with duct leakage testing | $420 - $520 | Duct accessibility, number of returns to isolate |
Homes over 3,500 square feet or with multiple attic spaces may run higher; we price those after a brief phone scope, still in writing before we arrive. Every estimate includes the Documented Photo Record. Bring us a competing written estimate - we offer a Free Second Opinion and will read it with you line by line. Call (737) 337-8049 for your written estimate.
Why San Marcos Homeowners Call Topside Attic Insulation San Marcos for GreenFiber Work
We’ve sealed and insulated over 9,000 homes since 2016, and the ones with GreenFiber in them taught us that cellulose performs only when the air sealing is done first. We don’t sell insulation over leaks. Our technicians are background-checked, uniformed, and trained to recognize GreenFiber product lines by sight and bag date. We also service Reflectix and other brands, so if your audit shows a material change is warranted, we have no proprietary lock-in forcing a GreenFiber solution that doesn’t fit.
Every applicable job gets before-and-after blower-door numbers published on the report. The 365-Day Done Right Promise applies to all work. Calls are answered by a live person, 24/7.
FAQs
No. As an independent GreenFiber service provider, our audit is non-destructive and does not alter the installed product. We probe depth, run pressurization tests, and photograph condition without removing material. If we do recommend removal for access, we document the reason in writing before touching it. For warranty claims on the product itself, you would still contact GreenFiber directly; our audit gives you the documented condition report they typically require.
Call (737) 337-8049 to schedule - estimates are free.
Most audits are scheduled within 48 hours and completed in two to three hours on site. Same-day scheduling is often available for homes near the IH-35 corridor or in the Blanco River neighborhoods. We text technician ETA the morning of.
Call (737) 337-8049 to check today’s availability.
Fixing air leaks first is always the lower total cost. Blowing additional GreenFiber over an unsealed attic is paying for R-value that wind-washes away through gaps; we’ve measured San Marcos homes losing 30% of rated performance this way. Seal first, verify with blower-door, then add insulation if the thermal map still shows need.
Call (737) 337-8049 for a written scope and price on both approaches.
We do not stock GreenFiber product; we are not an authorized dealer. For audits, no product is needed. If your scope requires additional insulation, we source from Owens Corning, Johns Manville, Knauf, Rockwool, CertainTeed, Icynene, Demilec, and GreenFiber - whichever material fits the application and your preference. We never lock you into a single brand.
Call (737) 337-8049 to discuss material options.
You receive a printed report with the blower-door CFM50 reading, thermal images with temperature annotations, an insulation depth map with GreenFiber coverage chart comparison, and photographs of any defects found. If duct testing was performed, leakage CFM25 to outside is included. This is your Documented Photo Record, delivered before we leave.
Call (737) 337-8049 to schedule - the report is included, not extra.
Written by Wes Okafor, Owner, Topside Attic Insulation San Marcos at Topside Attic Insulation San Marcos, serving San Marcos and nearby areas.