Owens Corning Spray Foam Insulation Nationwide

Owens Corning Spray Foam Insulation in San Marcos: What to Know First

We provide independent Owens Corning spray foam insulation in San Marcos, with most jobs scheduled within 48 hours and completed same-day. Most attic insulation jobs in a home this size run between $2,800 and $5,400 for open-cell spray foam, and we put a written price in your hand before anyone lifts a tool. This page is for homeowners who already have Owens Corning materials in their building envelope and need a technician who understands how those specific products age in Central Texas heat. Call (737) 337-8049 or text us - a live person answers, 24/7.

Call (737) 337-8049

How Owens Corning Products Fail - and How We Fix Them

• Fiberglas™ batts compressed by previous blown-in retrofits. We find this in San Marcos homes built 2005-2015 near the Texas State corridor: a contractor blew cellulose or loose-fill fiberglass over existing Owens Corning Fiberglas™ batts without checking compression. Compressed batt loses 30-50% of its labeled R-value because the trapped air pockets collapse. We remove the compromised layer, air-seal the top plates and can-light penetrations, then install open-cell spray foam to the full designed thickness.
• PINK Next Gen™ Fiberglas losing adhesion at roof decks above cathedral ceilings. The formaldehyde-free binder in this series can release from OSB sheathing when attic temperatures exceed 140°F repeatedly, which happens in San Marcos from June through September. The batt sags, creating a convection channel. We strip the failed material, verify the roof deck ventilation baffles are intact, and spec closed-cell spray foam directly to the deck - no air gap, no future sag.
• AttiCat™ PINK blown-in settling below top plates in older slab-on-grade homes. The Blown-In-Blanket System (BIBS) works when installed to full depth, but in the ranch-style homes common west of I-35, we regularly find the material settled 4-6 inches below the top plate, leaving the wall-to-ceiling junction thermally unprotected. That junction is where San Marcos homes lose the most conditioned air. We remove the settled material, seal the top plate with one-part foam, then spray open-cell to the full stud bay height.
• FOAMULAR® rigid board gaps at rim joists in pier-and-beam retrofits. Owens Corning’s XPS rigid foam is a fine product, but cut-and-cobble jobs at rim joists almost always leave seams and perimeter gaps. In crawl spaces off Wonder World Drive and Hopkins Street, we’ve found carpenter ants exploiting those gaps for passage. We pull the board, treat the wood, and spray closed-cell foam to create a monolithic seal - no seams, no pest highway.
• WeatherLock® Flex underlayment trapping moisture when spray foam is applied to roof decks from the interior. This synthetic underlayment is vapor-impermeable. When a homeowner or previous contractor sprays closed-cell foam directly to the roof deck underside without verifying the exterior layer’s permeability, moisture can accumulate in the sheathing during San Marcos shoulder seasons. We probe the deck with a moisture meter, replace compromised sheathing if needed, and spec a ventilated assembly or use open-cell foam with a vapor-smart exterior.

Our Owens Corning Spray Foam Insulation Process

1. 1
   Call and scope. You describe the space - attic, crawl, rim joist, garage ceiling. We schedule a site visit, usually within 48 hours in San Marcos.
2. 2
   Blower-door test and thermal imaging. We run a blower-door test - a pressurization reading that shows, in one number, how much air your building envelope is losing. Thermal imaging identifies bypasses the naked eye misses. You get the before number in writing.
3. 3
   Written price and material spec. We specify Owens Corning FOAMULAR® or certified-compatible spray foam based on your assembly, with OEM or quality aftermarket per your approval. The price is flat. No work starts without your signature.
4. 4
   Air sealing first, then insulation. We seal top plates, can lights, plumbing and electrical penetrations, and rim joist gaps before foam touches the space. 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
   Spray application and real-time thickness verification. Our crew installs to the specified inches, checking with a depth gauge every 100 square feet. We photograph the completed work for your Documented Photo Record.
6. 6
   Final blower-door test and closeout. We run the door again, hand you a single printed page with before-and-after air-changes-per-hour, and activate your 365-Day Done Right Promise. Written warranty, written scope, no exceptions.

Before

After

What Owens Corning Spray Foam Insulation Costs in San Marcos

These are real ranges from jobs we’ve completed in San Marcos and nearby New Braunfels, Kyle, and Buda. Every home is different - the only way to get your exact number is a site visit, and that estimate is free. Call (737) 337-8049 to schedule.

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

We’re an independent Owens Corning service provider - no factory authorization, no corporate script, just technicians who know how these materials behave in Central Texas attics. Wes Okafor trained in building science at Dawson Technical Institute and has spent two decades diagnosing why attics fail rather than filling them. Our crew carries Owens Corning, Reflectix, and other major brands so we’re never locked into a single product line when your assembly needs something different.

Every job gets the Haven Standard: written price before work starts, documented photo record when we leave, and before-and-after blower-door numbers on applicable jobs. The 365-Day Done Right Promise means if it’s not right, we make it right - backed by a written warranty you hold in your hand, not a website claim. Calls are answered by a live person, 24/7. Background-checked, uniformed technicians. Text updates when we’re en route.

FAQs