Owens Corning Wall Insulation Nationwide

Owens Corning Wall Insulation in San Marcos: What to Know First

We provide independent Owens Corning wall insulation in San Marcos as an independent Owens Corning service provider, with most wall insulation jobs completed in one day and pricing put in writing before any work starts. Most Owens Corning wall insulation jobs in San Marcos run between $2,800 and $6,400 depending on wall area, cavity condition, and whether we’re working with existing fiberglass batts, dense-pack cellulose, or injection foam. This page is for homeowners who already have Owens Corning products in their walls and need to add insulation, replace degraded material, or solve a comfort problem the original installation didn’t fix. Call (737) 337-8049 for a free estimate with a written price before any work starts.

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How Owens Corning Products Fail - and How We Fix Them

• Owens Corning EcoTouch PINK Fiberglas Batt compression in older San Marcos homes. The 3.5-inch batts rated R-13 are often jammed into 2×4 walls that settled or were over-compressed during original installation, dropping effective R-value to R-9 or lower. We remove the compressed batt, air-seal the cavity with targeted foam at penetrations, then reinstall to full loft or switch to dense-pack cellulose if the cavity is irregular.
• Owens Corning PROPINK Loosefill Fiberglas settling in walls with missed air barriers. Blown-in fiberglass in walls without proper netting or adhesive can settle 20-30 percent over five to seven years, creating a heat gap at the top plate. We find the settled zone with thermal imaging, extract the old fill, and re-dense-pack with stabilized material or injection foam that bonds to the cavity.
• Owens Corning FOAMULAR NGX rigid foam board gaps at rim joists and kneewalls. The XPS boards shrink slightly over time, and the factory-taped seams in San Marcos homes often fail where seasonal humidity swings exceed 40 percent. We pull the old boards, seal the rim joist with closed-cell spray foam to the full depth, then reinstall FOAMULAR only where it serves as a thermal break without being the primary air barrier.
• Owens Corning Thermafiber RainBarrier mineral wool moisture retention in south-facing walls. The hydrophobic formulation resists bulk water but can hold elevated moisture in San Marcos homes with failed exterior flashing, especially near the Blanco River floodplain where summer humidity stays above 70 percent. We test cavity moisture with a pinless meter, remediate the source, and replace only saturated sections rather than full-wall tearout.
• Owens Corning AtticCat loosefill overflow into wall chases from attic blow-ins. Installers in a hurry blow attic insulation until it spills into open wall top plates, creating thermal bypasses and potential fire hazards near can lights. We collar every top plate penetration with fire-rated foam, remove the wall chase blockage, and document the repair with photos for the homeowner’s record.

Our Owens Corning Wall Insulation Process

1. 1
   Call and scope. A live person answers at (737) 337-8049 24/7. We schedule a site visit, and under Haven Standard: Arrive on schedule, you get a named technician and a text when they are on the way.
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 - then scan walls with a FLIR camera to locate missing insulation, air leaks, and moisture anomalies.
3. 3
   Written price and scope. You get a flat price, written scope, and written warranty before anyone lifts a tool. Haven Standard Clause 1. No exceptions.
4. 4
   Air sealing first, then insulation. We seal top plates, electrical penetrations, and plumbing chases with targeted foam. 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
   Insulation installation with Owens Corning or alternative specification. We install the specified Owens Corning product, or if cavity conditions dictate, we specify Johns Manville, Knauf, or Rockwool with your approval - no proprietary lock-in.
6. 6
   Post-work blower-door test and documentation. We run the blower-door again, print the before-and-after air-changes-per-hour figure on a single page, and add photos to your Documented Photo Record. The crew cleans up. You pay the written price, nothing else.

Before

After

What Owens Corning Wall Insulation Costs in San Marcos

Most Owens Corning wall insulation jobs in San Marcos run between $2,800 and $6,400. Here’s what moves the number:

• Drill-and-fill fiberglass or cellulose in existing 2×4 walls: $2,800-$4,200 for a typical 1,600-square-foot home
• Injection foam in settled or empty cavities: $4,000-$5,800, higher if we need to repair interior drywall access holes
• Exterior wall insulation with FOAMULAR NGX over sheathing: $5,200-$6,400, including new fastening and drainage plane details
• Interior soundproofing with Thermafiber: $3,400-$5,000 depending on stud bay count and finish repair

Factors that push price up: multiple stories (scaffold or lift rental), stucco exterior that needs careful patching, knob-and-tube wiring that must be abandoned first, or cavity moisture remediation. We also source from Johns Manville, Knauf, Rockwool, CertainTeed, Icynene, Demilec, and GreenFiber if Owens Corning stock is back-ordered or if a different material suits your cavity condition better. Call (737) 337-8049 for an exact quote - estimates are free, and the price you get is the price you pay.

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, our owner, trained in building science and weatherization at Dawson Technical Institute and spent two decades diagnosing why attics fail before filling them. In San Marcos, we regularly see older slab-on-grade homes near the Texas State University corridor where air sealing at the top plate was skipped and always shows up in the utility bill. Our technicians are background-checked and uniformed, and we publish before-and-after blower-door numbers on every applicable job so you verify the result, not trust a claim. The 365-Day Done Right Promise applies to all completed work. We also service Reflectix and other brands if your project involves hybrid systems.

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