No Housewrap needed if exterior rigid foam insulation being used?
Should Housewrap not be used when 1″ rigid (extruded polystyrene) insulation is being applied over plywood sheathing (then taped) then a rain-screen, and then Hardie board siding to complete the exterior of a house?
I was reading the latest FH magazine and the article on Flashing windows to foam sheathing recently. They are applying the rigid foam directly onto the studs with no sheathing, so that is a little different than we are applying, but they don’t use Housewrap in their application explanation.
I want to build this house correctly and not trap moisture. I have also read that perhaps vapour barrier should not be used on the interior of the stud wall so that the moisture might be able to dry to the inside. Does anyone know the best way?
What is the best way to treat walls when using rigid foam applied to the exterior in the interior of BC, Canada, where outside winter temperatures do drop to -20C fairly regularly, but are usually 0-minus5C?