How long can pressure-treated plywood be left wet?
Once you have built the walls with plywood installed &amp; roof completed windows cut out &amp; entry door framed, the wet treated plywood floor will start to dry up. Purchase a moisture meter, test each treated floor sheet until the meter shows low moisture. Then install 4x8 sheets for a finish floor, particle board or 3/4 ply untreated and whatever after that. You're good to go.