Vapour barrier vs retarder in wall assembly

We are mid build in climate zone 6 (Bancroft, Ontario) and the more reading I do on vapour barriers the more confused I get.We have R5 silverboard HD XS (micro… We are mid build in climate zone 6 (Bancroft, Ontario) and the more reading I do on vapour barriers the more confused I get.We have R5 silverboard HD XS (micro…Read MoreGreenBuildingAdvisor