You can go as thin as 1/2" if you want. Either OSB or plywood will satisfy building code, but I'd check just in case. Or you can hang on a bit and Gary will be by to link you up to code info.What size of plywood should I use when framing? It's an exterior wall of a garage. I'll be putting up vinyl siding if that effects the size. OSB or plywood??
Don't you need to know the code to build the structure?I live in BC, Canada, not sure what the code is here.
Older garages were sheathed with ship lapped 1x8's around here.I am fixing a rotten wall and replacing the covering so structurally not changing anything.