Butt them together, then a coat of primer and a coat or two of bright
white and the inside will look like National Lampoons Christmas. Only
diff between yours and mine is I used 7/16 OSB - before the prices
skyrocketed!
John

wrote:

Hello, I am finishing up my shop walls tommorrow and I plan on using
3/8 inch plywood (already on hand). Do I but them up on each other or
should I leave some space between sheets for expansion? I'm not sure
how much plywood expands/contracts but I'm thinking that since I am
screwing the ply to studs spacing shouldn't matter since the screws
will inhibit movement anyhow. My ceilings are 8 feet and change so I
plan on using them vertically and trimming the edges so I can center
the edges on studs. Insulation is already up and I have the ceiling in
( 1/4 inch ply). Once all is in I am painting the whole thing white.
Any opinions, comments? Thanks in advance, Guy