7/16,s OSB here as well , now that the price is back down again ( $5,25 for 4x8 sheets ), I caulk the joints as I put it up & screw it on . Then use the mesh self stick tape for the seams , Smooth it over with caulk & roll on a good exterior white paint on it .
Keeps it protected in case it gets wet using My power washer to clean the floors & looks decent enough for a shed or shop . Bob
Keeps it protected in case it gets wet using My power washer to clean the floors & looks decent enough for a shed or shop . Bob