Emercor Insulated Rim Board: Do I need to spray foam the rim joists
Nav88
| Posted in Expert Exchange Q&A on
Hi I am in the same boat. I am based in Edmonton, Alberta: Climate zone 4A.
I have the same type of insulated rim board and the builder didnt insulated the rim joists with spray foam. I am finishing my basement now and was wondering if I need to spray foam them. Or any impacts if I spray foam the insulated rim board?
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Replies
See my reply in the other discussion.
I think they are out of business ...
But Weyerhaeuser makes a similar product
https://www.weyerhaeuser.com/woodproducts/document-library/document_library_detail/tj-9508/
begreener,
It looks like a better version, without the thermal bridging at the top or bottom.
Agreed. It looks like a typical LSL rim joist with some Zip-R pre-laminated to it. Nice product. This gets the rim joist insulation on the exterior, which is better than the more commonly retrofitted interior side too. I don't see any issue if someone were to want to put some exterior rigid foam over this too if they insulated the rest of the exterior the same way.
Bill