Osb comes in 4 by 8 foot sheets as does plywood but the manufacturing process allows the production of longer and wider ones.
Osb for shed roof.
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.
7 16 will be fine for 16 on center and 5 8 for 24 on center rafters.
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.
Standard asphalt shingles do an excellent job keeping the weather out.
The thickness required by josh s circumstances are good for roof snow loads of up to 70 psf again spanning 24.
This is a type of engineered particleboard made specifically for covering the roof of a shed or dwelling.
Good enough for houses good enough for a shed.
Osb is fine all the way around.
Plywood with similar propertiescurrently costs about 30 more for an equivalent thickness.
However there are some sceptics out there who doubt the strength and durability of osb.
With edge support and the same snow load 3 8 inch osb can be used.
Using oriented strand board is a tested way of reducing costs for building your shed.
Using oriented strand board osb for shed walls floors and roofs.
The osb thickness will be based on the rafter spacing.