I am building a backyard shed, 8x12. i realized i purchased 3/4" non-treated plywood for the floor... should i get treated instead? the shed will be on 4x4 treated skids on concrete blocks, with 2x6 joists. so the plywood will be 9+ inches off the ground in all areas.. That leaves you with 2 choices, the untreated 3/4" plywood or pressure treated 1/2" plywood. if it were my shed, and i'd be using it frequently, doubling up the 1/2" treated plywood would be the best option. but it doesn't end with simply that recommendation.. If you are storing anything heavy you will need to upgrade the floor. we offer 12” or 16” centered floor joist construction upgrades from our 24” standard centered floor joists. also, we offer 5/8″ or 3/4″ pressure treated plywood flooring which is a stronger superior floor material than our standard 5/8″ osb flooring..
-gravel. a gravel floor can be used if you are building a pole style building.-pressure treated lumber vs. standard lumber. the best material for building the floor of your shed is pressure treated lumber.. I used pressure treated poles and the first row of plywood and non-treated lumber above that. (gravel floor) if i was building a floor i would use treated for the floor also as there is a lot of moisture under the ground and under the wood to rot things out.. Building a shed floor is actually pretty straightforward. for many handymen, it’s a doable job in a day and a half, from picking up the materials to fastening the final screw. using 3/4 inch thick pressure treated plywood for your shed floor is the most economical choice and will last you 20+ years if done well..
