Knauf Attic Insulation Nationwide

Knauf Attic Insulation: The Austin Owner’s Guide

We stock and install Knauf-compatible attic insulation across Austin, with most full-attic jobs running between $900 and $2,400 depending on square footage and the R-value you’re targeting. We keep Knauf batts, rolls, and blown-in fiberglass on our trucks, so same-day and next-day installs are the norm rather than the exception for us. Most Austin homeowners find out their Knauf insulation is underperforming the same way: a bedroom that won’t hold temperature, an AC bill that jumped 30% over last summer, or a pest problem that exposed matted, compressed fiberglass in the attic floor. Chase Whitaker has seen every version of that discovery, and the fix is usually more straightforward than people expect.

Call (361) 321-0817

Which Knauf Models This Applies To

Knauf makes three attic insulation lines you’re most likely to have in an Austin home: EcoBatt (faced and unfaced fiberglass batts), Jet Stream (blown-in fiberglass), and the Knauf Performance+ series (higher-density batts for hot-climate attics like ours). Identifying what you have is usually a matter of checking the kraft-paper facing for a printed R-value and product name, or checking the blown-in bag labels if the installer left them near the attic hatch. Knauf uses color-coded packaging by R-value, so EcoBatt R-30 is a distinct kraft-face print from R-38, but neither is interchangeable with the Performance+ spec, which runs denser per inch. Aftermarket unfaced fiberglass cuts correctly for Knauf-stud-bay spacing of 16 and 24 inches on center, but we order Knauf’s true OEM sizing when the existing install used their faced batts with stapling flanges. A gotcha we see constantly in Austin attics: Knauf’s faced batts include a vapor retarder, and installing them upside-down in a humid Texas attic traps moisture against the drywall. That’s a code issue and a mold issue. We fix it the same day we find it.

Signs Your Knauf Attic Insulation Is Failing

• One room runs 8 to 10 degrees hotter than the rest of the house. This usually means the Knauf batts above that room have been pushed aside by past AC work, or compressed by foot traffic into a fraction of their rated R-value.
• Your summer Austin electric bill spiked without a change in thermostat habits. Fiberglass loses effectiveness when it gets dusty, damp, or compacted. A 15-year-old Knauf attic floor in Austin has seen all three.
• You can see the ceiling joists from the attic floor. Knauf blown-in fiberglass settles over time, and once you can see joist tops, you’re losing heat transfer through the wood. Blown-in Knauf should bury the joists completely.
• Mold or water staining appears on the kraft paper facing. Austin’s humidity plus a small roof leak means the paper jacket holds moisture against the fiberglass, killing its insulation value and creating a mold risk.
• Pests have tunneled through the insulation. Squirrels and roof rats in Austin neighborhoods like Hyde Park and Mueller will burrow through Knauf batts to nest, and the tunnels defeat the insulation’s air-sealing value.

Replacement Cost & What’s Included

For a typical Austin attic between 1,200 and 1,800 square feet, we quote $900 to $2,400 for Knauf-compatible blown-in fiberglass installed to R-38, the Austin Energy-recommended minimum for our climate zone. Batts run slightly higher per square foot, usually $1,100 to $2,600, because they require more labor to fit around trusses and penetrations. Every quote we give includes removal of compromised material when necessary, air sealing around top plates and penetrations, the Knauf product matched to your existing R-value or upgraded to current code, and a written guarantee on the work. We also deliver a line-item price before anything starts, so you know exactly what the material costs versus the labor. If you have an older Knauf install that’s mostly intact but underperforming in one section, we’ll tell you that too rather than sell you a full replacement.

Cost breakdown for Knauf attic insulation in Austin:

• Blown-in fiberglass, R-38, 1,200 sq ft attic: $1,100 – $1,800
• Blown-in fiberglass, R-38, 1,800 sq ft attic: $1,600 – $2,400
• EcoBatt R-38 batts, 1,200 sq ft attic: $1,300 – $2,100
• EcoBatt R-38 batts, 1,800 sq ft attic: $1,900 – $2,600
• Top-up of existing blown-in Knauf to reach R-38: $600 – $1,200

DIY or Call Us?

You can safely check what’s happening in your attic. Look for compressed batts, bare joists, moisture-stained kraft paper, and areas where insulation looks pushed aside. What you shouldn’t do is attempt a full Knauf attic insulation replacement yourself. Fiberglass blown-in work requires a calibrated machine, respirator-grade PPE, and knowledge of how to keep soffit vents clear so your attic still breathes. Getting R-value wrong in a Texas attic means another Austin summer of a house that won’t cool. We’re happy to inspect and quote, and if the problem is truly small, someone on the crew will tell you exactly what to do. Call us at (361) 321-0817 and tell me your square footage and I’ll give you a real number – no runaround.

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