With edge support and the same snow load 3 8 inch osb can be used.
Osb roofing material.
As the result they are stronger and basically water proof.
Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb.
Oriented strand board isn t plywood nor is it a type of particleboard fiberboard or wafer board and although it is a newcomer to a plywood dominated market its use for exterior sheathing is.
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Prior to covering the existing roof if applicable a pre inspection to verify condition and a single layer of existing roofing is required.
However the board is lack of natural moisture inside and won t dry as quickly as plywood.
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Osb is made out of strands of wood chips and chemically engineered materials to glue them together.
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1 x 6 roof decking doesn t qualify.
Sheets of 7 16 inch thick with no edge support can be used in an area where the snow load is 30 pounds per square foot.