Recent Q&A

• Ridged foam over wood floor

  Hello,I have a wood framed 1910 bungalow in zone 2a with wood floors on wood joists. Two rooms have lower floors (2-3”). I’d like to raise the floors to match the…

• How to insulate attic wall without stud bays

  Hello, I'm in zone 2A, I need to insulate a wall that is the side of my cathedral room. The attic is vented and will be insulated with a blown…

• Ducted mini split sweating

  Hello, I'm in zone 2A and recently had a 2 zone ducted Midea minisplit installed. The system is running well except for some sweating issues on hot/humid days. I have…

• Heat Recovery Water Heater System

  I can't find any articles about heat recovery units which use your A/C system to heat your water. It seems like a great idea, it's amazing the only unit I…

• Location of Multi Port Tee for Plumbing

  Hello GBA, Zone 2A, I'm replumbing my house, and need help deciding the location of the main multiport tees. There will be 12 lines for the cold, and 8 for…

• Vents to roof or wall?

  Need some advice. I have to run new vents for a dryer 4", a bathroom vent 4", and my kitchen downdraft vent 6". All are nearly in the middle of…

• Separate water lines for toilets?

  I'm getting ready to replumb my house, and thinking of running separate lines for my hose and toilets (not on the water softener or water filters). This would be useful…

• Insulating unvented flat roof with multiple materials

  I have 6" joists under the flat roof to work with, I'm in Climate Zone 2A - Tampa, FL. I recently installed a TPO roof with tapered foam, the taper…

• Minisplit Design for Whole House

  Hello, first of all thank you GBA for all of your articles, I have read many and found them to very helpful and interesting. I am renovating my house (in…