Keep in mind that the load of the roof still plays a role in the plywood thickness.
Shed roof osb thickness.
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.
Never attach roof sheathing with staples.
Plywood with similar properties currently costs about 30 more for an equivalent thickness.
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.
7 16 will be fine for 16 on center and 5 8 for 24 on center rafters.
Osb is fine all the way around.
What size plywood for the roof.
When this is the case experts recommend a 5 8 inch thick sheet.
8d ring shank nails should be used instead.
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.
The osb thickness will be based on the rafter spacing.
A flatter roof with rafters farther apart may need a thickness of up to inch.
Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame.
Sheathing should be a minimum of 19 32 inch thick.
The thickness required by josh s circumstances are good for roof snow loads of up to 70 psf again spanning 24.
Thicknesses range from 5 16 to 3 4 inch and the proper one to use.
The typical thickness range for sheathing is 3 8 to 3 4 inch.