BEST - 3/4 inch Pressure Treated Plywood
The Best and Longest lasting floor is a 3/4 inch Pressure Treated (PTL) Plywood.
BETTER - 5/8 inch Pressure Treated Plywood
The Second Best and longer lasting floor is a 5/8 inch Pressure Treated (PTL) Plywood.
GOOD - 3/4 inch CDX Quality Plywood
A GOOD Quality floor is achieved by the use of a 3/4" CDX Plywood.
STANDARD - 5/8 inch CDX Plywood
The Standard flooring is a 5/8 inch CDX Plywood floor for light-to-moderate loads and less than high traffic.