For rafters spaced 20 or more inches apart 1 2 or 5 8 inch plywood is recommended.
How thick osb for shed roof.
Oriented strand board osb is a material with high mechanical properties that make it particularly suitable for load bearing applications in construction.
Osb may have greater shear strength the ability to span distances than comparable thickness of plywood.
Plywood shed flooring is usually 3 4 inch and osb 5 8 inch thick.
Using oriented strand board is a tested way of reducing costs for building your shed.
Osb is fine all the way around.
With this thickness any deflection under dead loads only the weight of materials only should prove to be imperceptible.
The osb thickness will be based on the rafter spacing.
Roofing plywood sizes material wood joist and plywood or osb decking oriented strand board common 15 32 in roof decking material thickness osb or plywood for roofs walls roof deck materials to ensure a le.
Plywood with similar properties currently costs about 30 more for an equivalent thickness.
The most common rafter spacing is 24 inches and 5 8 inch plywood is recommended for that.
7 16 will be fine for 16 on center and 5 8 for 24 on center rafters.
Structurally osb and plywood are very similar in strength and ability to hold nails or screws.
Good enough for houses good enough for a shed.
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.
8 tips for getting the best out of your oriented strand board osb how to install roof sheathing pro builder.
Why waste ply on a roof unless its rough shuttering ply 12mm wbp is perfectly fine if your feeling really tight osb 3 aka stirling board will do the trick i figured hardwood plywood would be a better choice since it s more substantial.
18mm was initially chosen for its strength.
It will support roof.
However there are some sceptics out there who doubt the strength and durability of osb.
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.
A viable alternative to plywood this osb board is engineered to prevent any cupping warping or splitting.
With edge support and the same snow load 3 8 inch osb can be used.