Owens Corning Blown-In Insulation Nationwide

Owens Corning Blown-In Insulation in San Marcos: What to Know First

We provide independent Owens Corning blown-in insulation service in San Marcos, typically completing attic jobs in one day with a written price delivered before any work starts. Most blown-in top-ups or full attic replacements run between $1,800 and $4,200 depending on square footage, access conditions, and whether air sealing at the top plate is needed first. Call (737) 337-8049 for a free estimate with a written scope and warranty included.

Call (737) 337-8049

This page is for homeowners who already have Owens Corning insulation in their attic or walls and need service, top-up, or replacement. You’re not looking for a sales pitch on why to choose Owens Corning - you own it, and you need someone who knows how it behaves in a San Marcos attic after seven summers of 100-degree days and the occasional freeze.

How Owens Corning Products Fail - and How We Fix Them

• Owens Corning AttiCat PINK Fiberglass settles below labeled R-value in San Marcos homes with significant air leakage. The blown-in fiberglass performs at its tested R-value only when installed at the specified thickness, but attic air movement from unsealed can lights and top plates - the junction where wall framing meets ceiling drywall - gradually compacts the material. We remove or work around the settled layer, seal every penetration with fire-rated caulk and rigid foam, then blow new AttiCat to the correct depth with a depth marker photo in your documented record.
• Owens Corning ProCat loose-fill fiberglass develops thermal bypass at the eaves in homes built 2010-2018 near the Texas State University corridor. Builders in that period often installed baffles too short or omitted them entirely, allowing wind washing - outdoor air moving across the insulation surface - to strip heat from the fiberglass at the attic edge. We install proper rafter baffles extending past the top plate, verify soffit vent continuity, and dense-pack the eave zone if the cavity geometry allows.
• Owens Corning EcoTouch PINK Fiberglass Blown-In shows moisture staining after roof leaks or bathroom vent terminations in the attic. Fiberglass itself doesn’t grow mold, but the facing and accumulated dust on older batches can support growth when relative humidity stays above 70 percent, which happens in San Marcos attics with improper ventilation from March through October. We remove contaminated material, treat the deck with an antimicrobial, repair the moisture source, and reinstall with a vapor diffusion strategy appropriate for our mixed-humid climate zone.
• Owens Corning AttiCat system bags from 2015-2019 occasionally show inconsistent density when machine-blown by contractors who skipped calibration. The AttiCat blowing machine requires periodic gate and air-pressure calibration; when it’s off, you get fluffy zones that settle fast and dense zones that underperform. We verify machine output against the bag coverage chart every job, and we mark the attic joists with depth indicators so you can check our work with a ruler years later.
• Owens Corning wall insulation in older San Marcos slab-on-grade homes loses contact with the cavity due to shrinkage and settling after 10-15 years. The blown-in fiberglass in these walls was often installed at low density through a single hole per cavity, leaving gaps at the top and bottom that create convection loops - air circulating inside the wall, carrying heat straight past the insulation. We dense-pack with a higher-pressure technique, using a tube-and-fill method that forces material to every corner of the cavity, verified by infrared camera before we patch the holes.

Our Owens Corning Blown-In Insulation Process

1. 1
   Call and scheduling. A live person answers, or you text. We book a diagnostic visit with a named technician and send a text when they’re en route - Haven Standard: Arrive on schedule.
2. 2
   Attic inspection and blower-door test. We run a blower-door test - a pressurization reading that shows, in one number, how much air your building envelope is losing. We photograph the existing Owens Corning product, measure settled depth against the labeled bag count if tags are present, and identify every air leak at the top plate, can lights, chimney chase, and duct penetrations.
3. 3
   Written price and scope. You get a flat price, written scope, and written warranty before anyone lifts a tool. No work starts without it. If you have a competing estimate, we provide a free second opinion and read it with you.
4. 4
   Air sealing first, then insulation. We seal every penetration with appropriate materials - fire-rated caulk for top plates and electrical boxes, rigid foam for larger gaps, metal flashing for chimney contacts. The blower-door test is repeated to verify the reduction. The R-value tells you how slow heat moves through the material - the blower-door number tells you whether any of that matters.
5. 5
   Blown-in installation to spec. We calibrate the blowing machine to Owens Corning’s coverage chart, install to the marked depth with verification photos, and ensure even distribution around obstructions. For wall work, we dense-pack to 3.5 pounds per cubic foot minimum.
6. 6
   Documentation and closeout. You receive a Documented Photo Record of the completed work, before-and-after blower-door readings on applicable jobs, and the 365-Day Done Right Promise in writing. We leave the attic cleaner than we found it, which in San Marcos sometimes means removing the previous contractor’s lunch bags.

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What Owens Corning Blown-In Insulation Costs in San Marcos

Most attic jobs in a home this size run between $1,800 and $4,200. Wall dense-pack work runs higher per square foot due to access labor.

Factors that increase cost: active rodent contamination requiring removal and sanitization, recessed can lights requiring airtight covers, and attics with less than 18 inches of clearance at the eaves. We publish the price on the page because Haven Standard Clause 1 requires a written price before any work starts - not a phone call to find out whether we’re in your budget. Call (737) 337-8049 for your exact quote; estimates are free.

Why San Marcos Homeowners Call Topside Attic Insulation San Marcos for Owens Corning Work

We’ve sealed and insulated over 9,000 homes since 2016, every one with a written price before work started and a documented record when the crew left. Wes Okafor, who leads this operation, trained in building science and weatherization at Dawson Technical Institute and spent two decades diagnosing why attics fail before filling them. In San Marcos, that means knowing why older slab-on-grade homes near the Texas State University corridor routinely skip air sealing at the top plate - and always feeling it in the utility bill.

We don’t lock you into Owens Corning. We also source from Johns Manville, Knauf, Rockwool, CertainTeed, and others, plus Reflectix for radiant barrier applications where the roof geometry suits it. The 365-Day Done Right Promise applies to all completed work. Calls are answered by a live person 24/7.

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