Do I need a vapour barrier in Ontario?

Gordon Harold
Updated: April 26, 2021

I'm doing some remodelling on a cottage in Ontario. Some walls are being stripped to the studs and getting insulated with Roxul R14, some walls are not. I plan on adding house wrap and insulation and siding on exterior soon. Do I need a vapour barrier on the interior warm side if I'm using house warp on outside? Will a good sealing primer prevent any moisture from travelling through walls? Thanks!

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