Having read all the fine articles FH has on vapour drive and adding exterior insulation the best advice I have is that with heating and air conditioning in climate zone 4 marine my house (with 4 ml poly on the warm side will be dry half the year. And be careful when addressing vapour drive over the long term. So my question is, when I add my exterior insulation do I take the opportunity to remove the existing 4 ml poly or am I at risk over the long term. For more house details, see my Forum post of February 6 2025. Thanks.
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Replies
You’ll have to provide a link to your other post.
Go to it, copy the url and repost here.
Thanks Calvin Sorry but I see no clues as to how to do that on my phone
https://www.finehomebuilding.com/forum/i-believe-the-owner-should-remove-the-4m-poly-vapour-barrier
Let’s see if this is it.