Recent Q&A

• How to finish/seal duct through ceiling?

  I need to run an 8" duct from the attic through the ceiling to connect to a return. It will be in a closet so looks aren't of prime importance,…

• Alternative to Hard Hats

  Are there any alternatives to a hard hat for keeping roofing nails out of your scalp when working in the attic? Anybody make Kevlar flat caps? I would wear a…

• Least-bad way to run return in unconditioned attic (4A)

  长而复杂的question... I'm working on an attic that was converted to a bedroom (lower side of 1950s split-level). I'm insulating the kneewalls with RockWool and polyiso to about R-28.…

• XPS for furring attic kneewall?

  Hello all,I need to improve an attic kneewall. It's 2x4 with badly-installed fiberglass batts. While bemoaning that it's not 2x6, I realized I could furr out 2 more inches and…

• Effectiveness/efficiency of HVAC circulate mode?

  Last time I replaced a thermostat, I got an Aprilaire that has a 'circulate' timer. If heat or AC has not been used for an hour, the stat will run…

• Best way to cap CMUs/cement blocks?

  Hello all,Following the recommendations here, I'm working to improve my house's efficiency by stopping the air leaks first. I'll closed off some real doozies (and apparently closed off the mouse…