Good morning all – I live in Atlanta, GA and my house was built in 1999. It’s 3 sided brick but the back is Hardie lap siding that’s seen better days, and I’m going to start replacing it. The back of the home’s sheathing is 1/2″ polystyrene foam board in most places with 1/2″ OSB on the corners and in some areas around window corners, doors, etc. There’s no house wrap underneath the siding since I don’t think it was code required with polystyrene board making up 99% of the sheathing.
My question is – as I replace this siding, I to do what’s best. Is there any issue with me covering the entire back of the house with a house wrap prior to installing the Hardie lap siding? I know that’s standard practice for OSB sheathing but will there be any issues covering up the polystyrene as well? Won’t cause a scenario where it’ll actually allow moisture to build up?
Appreciate the advice!