Plywood wall sheathing

Hrose77 said:

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??
Cheers

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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.
It would help if you stated where you live.
Personally I only use 3/4" exterior grade ply.

Hrose77 said:

I live in BC, Canada, not sure what the code is here.

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Don't you need to know the code to build the structure?

Hrose77 said:

I am fixing a rotten wall and replacing the covering so structurally not changing anything.

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Older garages were sheathed with ship lapped 1x8's around here.
I'd replace the damaged wood with the same thickness material.