Healthy home renovation / Discussions

I had an interior porch torn down and had an exterior porch built. Now the back wall to the building is letting in cold air. I need to insulate the building.   When renovating exterior walls you need to observe the normal practices for wall assemblies or ‘control layers’, meaning air barriers, vapor barriers and therma...

I'm planning on stripping the outside walls right to the studs in an old cabin in cold/very cold climate. It will be heated once a week in winter. There is no vapor barrier right now in the walls. Is it OK to install polyethylene on the backside of the studs, then adding fiberglass mats, finishing with Tyvek, furring a...