Recent Q&A

• Evaporative sealants

  When an evaporative curing sealant I believe is what it’s called, dap extreme stretch (not a chemically curing sealant) is closed up but not sandwiched between two impervious surfaces, will…

• Bath fan duct routing vaulted ceiling

  Do you run bath fan ducting up or down the ceiling rafters? (See picture attached) Also, I’m assuming you keep this run as short as possible to maximize r value…

• Bathroom vent through metal roof

  When looking online for flashing products for a bathroom vent about all I came across was the same type of flashings used for pipes - a pipe boot.What are some…

• Bath fan venting

  I have a Panasonic I am now stuck with since I can’t return. I say stick because I do not like the 3” oval outlet. My question is this: will…

• Bathroom Exhaust Outlet Size and Airflow

  If your bath fan has a 4” outlet on it, is there any benefit to increasing it to a 6” immediately and carrying that all the way to termination or…

• Plumbing vent through roof

  I live in zone 4c. I’m wondering if there is any benefit to putting a 2” 3” reducer on each of my existing 2” vent pipes (there’s 3 total for…

• Gutters and French drains

  4c I spoke with a local building inspector a while back and asked him if there are gutters on a house if a French drain is needed? The inspector said…

• Plumbing Vents Through Siding

  Zone 4c. Wondering if it is allowed to only vent plumbing through siding. I really can’t find info on that anywhere. I’d like to forego venting through roof if I…

• Choosing Drain Pipes

  After browsing this site it seems not too many are fans of the black corrugated single wall rolls. my options around here for drain pipes are schedule 40, sdr35, and…

• Construction Details for Retaining Wall

  Seems to be a million ways to do a retaining wall and I don’t want to pick the wrong one. I believe this drawing makes a lot of sense. Anyone…