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geshie t1_jabd15h wrote

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

Yes there are - fire blocking requirements are in OBC 9.10.16. https://www.buildingcode.online/1506.html

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hoppyending OP t1_jabe909 wrote

I think I misunderstood u/r7-arr’s comment. Yes I’m planning to put fire blocking between the interior wall and exterior wall at the top plate. I don’t think any other fire blocks are necessary in Ontario for interior walls.

Edit: My understanding is that fire code Sheetrock is acceptable, so the comment about my framing being incorrect didn’t make sense.

Edit #2: 1/2” Sheetrock is apparently acceptable according to 9.10.16.3. I don’t even have to buy the fire code stuff.

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r7-arr t1_jachv1o wrote

The sheetrock or plywood should be between your top plate and extend to the sill plate. The seam between the sill plate and the sheetrock or plywood should be caulked with fire blocking caulk. Once you finish your walls and ceiling, you will have created a massive chimney for any fire unless you put up the blocking.

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MinkOWar t1_jabhz29 wrote

9.10.16.2 is the relevant article, and they are filling the wall with insulation, so fireblocking is not required between the wall and floor inside a dwelling unit.

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