Recent Q&A

• Vapor Barrier at Floor Joist and Rim Board

  Hi, What is the best approach to have a continuous vapour barrier around the floor joist/rim board from the first to the second floor? Thank you, Arnold

• Question being reviewed

  Hi,Why is GBA now reviewing questions before they are posted? What brought the need for this new requirement? The question I asked a day ago is still not showing up.Thank…

• Exhaust only ERV system

  Hi,I am doing an exhaust ERV system and the HVAC design has 20CFM for the both bathroom. Is that sufficient to handle the moisture after hot showers?Note that I am…

• Slab insulation

  Hi,Is there a specific spray foam that should be used to fill in gap mostly around pipes and conduit when installing insulation below the slab prior to pouring?The EPS foam…

• Tying Garage into House Drainage System

  Hi, Is there any issues or concern with connecting the weeping tile from my detached garage to the house? The reason is the weeping to daylight for the house is…

• Water line for slab on grade

  Hi,The well will be drilled and the water line with electrical wire pushed through after the slab has been poured.I presume installing it before the footings are installed would be…

• Pipe for Radon Mitigation System

  Hi, Having read a bunch articles on Radon, there does not seem to be a clear indication as to the location and length of perforated pipe (corrugated Big "O" or…

• Ventilation system question

  Hi, I am looking for some opinion from everyone on GBA on which ventilation setup I should lean towards. I know there are different views and approach but I am open…

• Sheathing to Interior vs. Exterior

  Hi, I will be framing our new house come spring 2022 after the original company not longer seems interested and other framing company are either fully booked or charging a…

• slab on grade in winter

  Hi,Due to endless delays to obtain my building permit, we were schedule to pour the 18-20 inches footing with the slab on grade in October but now it won't happen…