These materials are often used to construct the base of a porch, and when used as a surface covering, it creates a matched and completed wooden deck piece. Also, since this kind of wood is treated with an additive (usually copper), it corrodes metal fasteners not made out of galvanized or stainless steel. Also, it would be best if you didn't burn it because of its additives, and its sawdust is not healthy when it becomes particulate in the air.
Then a quality deck sealing agent needs to be applied to protect its surface from water and UV rays.
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