The osb thickness will be based on the rafter spacing.
Osb for shed roof.
Good enough for houses good enough for a shed.
Using oriented strand board osb for shed walls floors and roofs.
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.
Underneath the shingles is osb sheathing.
Standard asphalt shingles do an excellent job keeping the weather out.
Thicknesses range from 5 16 to 3 4 inch and the proper one to use.
7 16 will be fine for 16 on center and 5 8 for 24 on center rafters.
Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb.
Osb is fine all the way around.
This is a type of engineered particleboard made specifically for covering the roof of a shed or dwelling.
Using oriented strand board is a tested way of reducing costs for building your shed.
However moisture has a way of finding its way into a structure.
The thickness required by josh s circumstances are good for roof snow loads of up to 70 psf again spanning 24.
However there are some sceptics out there who doubt the strength and durability of osb.
Osb comes in 4 by 8 foot sheets as does plywood but the manufacturing process allows the production of longer and wider ones.