Both: osb and plywood are covered up in flooring applications, so the appearance of the subfloor does not matter. in a pinch�if the surface had to be exposed in a workshop or shed �you could say that plywood wins out, due to its true wood grain look vs. osb's flaky appearance.. Pressure-treated plywood is an exterior-grade plywood that will resist rot and decay for a lifetime. it is the preferred flooring material for an outdoor shed. it will resist decomposition from. 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. can i stick with the non treated plywood and give it a good covering of primer & paint, or am i asking for trouble later?.
Osb and plywood are both commonly sold in 4-by-8-foot sheets, but osb can be made in much larger panels, up to 8-by-24 feet. using larger osb panels can be an advantage when flooring a big or odd-size shed, reducing the number of joints in a floor.. View of floor with plywood/osb deck. support to the edge of the 'sheet' is provided by timber 'noggins' 3.0 plywood shed floor. the comments for plywood are very similar to that for osb in the way that it is installed and fixed. there are many different types of plywood. the one that i have used most commonly is shuttering ply.. Click here if you want to build your shed on a concrete slab. if you live in an exceptionally wet area or have a major termite problem you might want to use pressure treated wood for the entire floor including the skids, the floor joists and the plywood sheeting..