11/02/2026
Austin summers can push attic temperatures to around 140°F. Your insulation is what keeps that heat out of the rooms below.
That's why attic insulation matters so much here. Here's a quick check you can do from the attic hatch with a flashlight.
Look across the attic floor. If the insulation sits level with or below the wood floor joists, so you can easily see them, ENERGY STAR says you probably need more.
For Austin's climate zone (zone 2), ENERGY STAR's insulation chart says to add about R-49 if your attic is uninsulated, or add about R-38 if you already have 3 to 4 inches.
Check the edges too. Insulation often runs thin out near the eaves even when the middle looks fine.
One safety note: if you see gray, pebbly, flaky insulation (it may be vermiculite), don't touch it until it's been tested.
Austin homeowner wondering about your attic? DM us "ATTIC" and we'll follow up.