Expanding foam around perimeter?

[rhysjc]

Hi all, in need of some advice!

I’ve taken up the old carpet and will be laying LVT after I’ve overboarded with some ply. My question is around what I should be doing around the edges of the floorboards where there’s a gap to the wall? When I removed the old skirting there was some sort of black fibre stuffed in the gap. I assume the idea is to stop drafts though this is upstairs so above a heated room, and maybe also to block some noise?

Should I be replacing this, and if so with what? I was thinking expanding foam but concerned that may stop the boards expanding?

 

[Wayners]

Foam is soft. Won't stop movement of boards

 

[rhysjc]

It does set pretty hard, maybe it’s soft enough to allow expansion still?

 

[drives]

You will be fine with expanding foam around perimeter, and then trimming it back. Whether this is more effective than what you have in situ, is possibly debatable. With the ply overboarding you are screwing it down at 150mm centres I'm guessing, so any expansion will be negligible anyway.