r7-arr t1_jab582c wrote on February 28, 2023 at 3:52 AM

Reply to comment by hoppyending in Add additional insulation to walkout basement wall cavity. Good idea? Bad idea? by hoppyending

I find that hard to believe. It's been in the IRC for years. https://codes.iccsafe.org/s/IRC2015/chapter-3-building-planning/IRC2015-Pt03-Ch03-SecR302.11

MinkOWar t1_jabi4nw wrote on February 28, 2023 at 5:56 AM

Canada doesn't use the IRC.

Also, fireblocking materials in that reference include glass fiber batts... so OP's literally proposing to fill the wall with approved fireblocking by that reference.

r7-arr t1_jach3u6 wrote on February 28, 2023 at 1:16 PM

I guess fire is different in Canada. There should be a solid block of plywood or 5/8 drywall at the top of the cavity that he has created to create a block between that and the joist bays. The reason is that any fire that starts in that wall space will rapidly spread into the basement ceiling. Fiberglass batts are not fire blocking. Mineral wool batts are acceptable.

randomn49er t1_jabaeab wrote on February 28, 2023 at 4:37 AM

I have only been required to do this for seperate living quarters in the basement. In my experience this is not required if one family has free access to all levels of the home.

Spoona1983 t1_jabgvrv wrote on February 28, 2023 at 5:42 AM

You're assuming USA i personally would have assumed canada as op used C denoting celcius and also the 60°C temp difference is kinda normal for canadain cities

Thrawn89 t1_jactz7x wrote on February 28, 2023 at 2:56 PM

You'd be assuming north America, Europe also uses C.