Osb roof panels should always be installed with the grade stamp facing into the attic and the screened surface with the nail guide lines facing up.
Roof delivery osb.
Oriented strand board osb is a material with oriented strand board osb is a material with high mechanical properties that make it particularly suitable for load bearing applications in construction.
When the grade stamp is covered by roofing the building inspector will not be able to confirm that the correct osb roofing panel was used.
Thicknesses range from 5 16 to 3 4 inch and the proper one to use.
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.
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A homeowner recently wrote and asked me the following regarding osb roof decking.
Osb comes in 4 by 8 foot sheets as does plywood but the manufacturing process allows the production of longer and wider ones.
Oriented strand board commonly referred to as osb is a type of engineered lumber similar to particle board formed by adding adhesives and then compressing layers of wood strands.
With edge support and the same snow load 3 8 inch osb can be used.
Osb is widely used as roof decking material.