I'd like to build a shed in my back yard but would prefer to build it on top of a treated lumber floor versus a concrete floor. I live in New Hampshire where the weather can be severe. My preference would be to install a 6' overhead door on the shed to allow easy access with my riding lawnmower but am concerned about the durability and/or damage to the exposed treated floor. Is it advised to do something like this, and if so, what are some recommendations to protect the exposed portion of the treated flooring?