For the curious 7 16 osb has a span rating of 24 16 and with supports every 24 inches is good for a roof live load of 40 psf pounds per square foot with a 10 psf dead load.
Shed roof osb thickness.
For heavier loads a 40 20 rated panel 19 32 or 5 8 will support a 130 psf live load and 48 24 rated panels 23 32 or are good to175 psf.
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Osb comes in 4 by 8 foot sheets as does plywood but the manufacturing process allows the production of longer and wider ones.
Using oriented strand board osb for shed walls floors and roofs using oriented strand board is a tested way of reducing costs for building your shed.
When this is the case experts recommend a 5 8 inch thick sheet.
The thickness required by josh s circumstances are good for roof snow loads of up to 70 psf again spanning 24.
Plywood with similar properties currently costs about 30 more for an equivalent thickness.
Sheathing should be a minimum of 19 32 inch thick.
The osb thickness will be based on the rafter spacing.
8d ring shank nails should be used instead.
7 16 will be fine for 16 on center and 5 8 for 24 on center rafters.
Never attach roof sheathing with staples.
The typical thickness range for sheathing is 3 8 to 3 4 inch.
Osb is fine all the way around.
Thicknesses range from 5 16 to 3 4 inch and the proper one to use.
A flatter roof with rafters farther apart may need a thickness of up to inch.
What size plywood for the roof.