Owens Corning Wall Insulation Nationwide | Walt’s Insulation

Owens Corning Wall Insulation in Sunnyvale: What to Know First

We install, repair, and upgrade Owens Corning wall insulation throughout Sunnyvale, and most jobs are done in a single day. Wall insulation work here typically runs $1.80 to $4.20 per square foot depending on whether we’re drilling and filling existing walls, insulating during a remodel, or soundproofing an interior wall. We’re an independent Owens Corning service provider, not a factory branch, which means we recommend what actually works for a Sunnyvale house, not what a corporate sales quota says to push.

Call (669) 215-4805

This page is for Sunnyvale homeowners who have Owens Corning products in their walls, or who are planning a wall insulation project and want the straight story on what Owens Corning materials do well, where they fall short, and what it really costs to fix them. Call (669) 215-4805 and a live person answers, day or night.

How Owens Corning Products Fail - and How We Fix Them

Owens Corning makes solid insulation. But every product has weak points, and after 25 years of opening up walls in Sunnyvale homes, we’ve seen exactly where theirs show up.

• Pink Fiberglas batt settling in older ranch homes. In the 1960s and 70s ranch-style houses near Murphy Avenue, we regularly find Owens Corning R-11 and R-13 batts that have slumped 4 to 6 inches inside the wall cavity. Gravity plus decades of minor vibration does it. The fix is drill-and-fill with Owens Corning AttiCat blown-in fiberglass, which fills the void the settled batt left behind without tearing out drywall.
• Kraft-faced batt vapor barrier installed on the wrong side. Sunnyvale’s climate is mild, but we still get damp winters. We’ve opened walls where the kraft paper faced the exterior sheathing instead of the living space, trapping moisture against the studs. We see rot starting at the bottom plates in older homes near the bay side of town. The fix is removing the affected batts, correcting the orientation, and sealing the cavity properly.
• Foam injection gaps around electrical boxes. When Owens Corning FOAMULAR or Thermafiber was injected into existing walls, installers sometimes went light around outlets and switches. The result is a cold spot you can feel on the wall plate in January. We pull the cover, inject foam behind the box from inside the wall, and re-seal. Takes 30 minutes per box.
• Thermafiber mineral wool compression. Thermafiber is great for soundproofing, but it’s dense, and we’ve seen DIY installs where it was stuffed too tight into a 2×4 cavity, cutting its R-value by a third. We measure the cavity, cut the batt a half-inch wide of the stud spacing, and let it friction-fit the way the manufacturer specs it.
• Basement and crawl space walls with unfaced batts touching concrete. In Sunnyvale homes with raised foundations, we find Owens Corning unfaced fiberglass batts shoved against concrete stem walls. Concrete wicks moisture, the batt absorbs it, and mold follows. The fix is pulling everything out, installing a proper vapor barrier, and using closed-cell foam or a rigid board against the concrete instead.

Our Owens Corning Wall Insulation Process

Here’s exactly what happens when you call us for Owens Corning wall insulation work in Sunnyvale.

1. 1
   Call and talk to a person. You reach a live human at (669) 215-4805, not a voicemail. We ask about your house, your comfort issues, and what’s in the walls now if you know.
2. 2
   Wall assessment. We check wall cavities with an infrared camera to find voids, settling, and cold spots. No guesswork. Green, yellow, and red on a screen tell us exactly where the problem is.
3. 3
   Straight recommendation. We tell you what we found and what we’d do. If it’s an Owens Corning product that’s still doing its job, we’ll say so. We don’t sell work you don’t need.
4. 4
   The fix. Drill-and-fill, batt replacement, foam injection, or soundproofing, done with Owens Corning materials where they’re the right call, and the right aftermarket equivalent when they’re not.
5. 5
   Post-job verification. We re-scan the walls with the infrared camera to confirm the cavities are full and even. You see the before and after images.
6. 6
   Done Right Promise. Every job is covered by our lifetime workmanship guarantee. If it’s not done right, we make it right. No runaround.

What Owens Corning Wall Insulation Costs in Sunnyvale

Here’s what you can expect to pay for common Owens Corning wall insulation work in Sunnyvale:

• Drill-and-fill existing walls: $2.50 to $4.20 per square foot of wall area. A 1,500 square foot home with exterior walls to fill usually lands between $3,500 and $6,500.
• Batt replacement during remodel: $1.80 to $3.00 per square foot, including removal of old material.
• Interior wall soundproofing with Thermafiber: $2.80 to $4.00 per square foot, depending on wall size and accessibility.
• Foam injection for existing walls: $3.50 to $5.50 per square foot. Higher material cost, but no drywall removal.

What moves the price: wall accessibility (crawl space vs. second story), whether old insulation needs removal, and how many electrical boxes or plumbing penetrations we have to work around. We offer a free second opinion on any written estimate, and there’s no trip charge inside our service county. Seniors and veterans always get 10% off. Call (669) 215-4805 for an exact quote.

Why Sunnyvale Homeowners Call Walt’s Insulation for Owens Corning Work

We’ve been doing this since 2000, and we’re the one down the road, not an 800 number. Walt Brenner owns this company, answers for the work personally, and has been in Sunnyvale attics and crawl spaces long enough to know which houses were insulated well, which were insulated cheaply, and which have never been touched since the day they were built.

Our techs are background-checked and uniformed, so you know exactly who’s walking through your door. We work with Owens Corning products regularly, and we also carry other lines including Rockwool, Johns Manville, Knauf, and Reflectix, which means we’ll never force a brand that isn’t the right fit for your wall assembly. Good insulation should be invisible - you only notice it when it’s missing. If you’re noticing it, call us.

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