I live in Southern Alberta and will be replacing my exterior vinyl siding with wood, I also want to add insulation at the same time. It's a 2x4 wall with pink insulation and a vapour barrier behind the drywall, and only vinyl on the outside. There are a lot of different kinds of rigid foam panel and I don't want to choose the wrong one, which do you recommend and how much will I need? Thanks, Michael.
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