How Thick Osb For Shed Roof

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. Using oriented strand board is a tested way of reducing costs for building your shed. 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.

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The osb thickness will be based on the rafter spacing.

How thick osb for shed roof.

However there are some sceptics out there who doubt the strength and durability of osb. Osb is fine all the way around. Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb. A viable alternative to plywood this osb board is engineered to prevent any cupping warping or splitting.

7 16 will be fine for 16 on center and 5 8 for 24 on center rafters. With this thickness any deflection under dead loads only the weight of materials only should prove to be imperceptible. The most common rafter spacing is 24 inches and 5 8 inch plywood is recommended for that. 8 tips for getting the best out of your oriented strand board osb how to install roof sheathing pro builder.

It will support roof. 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. Good enough for houses good enough for a shed. The most common uses are for sheathing in walls flooring and roof decking.

Plywood with similar properties currently costs about 30 more for an equivalent thickness. 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. With edge support and the same snow load 3 8 inch osb can be used. Plywood shed flooring is usually 3 4 inch and osb 5 8 inch thick.

Oriented strand board osb is a material with high mechanical properties that make it particularly suitable for load bearing applications in construction. Structurally osb and plywood are very similar in strength and ability to hold nails or screws. For rafters spaced 20 or more inches apart 1 2 or 5 8 inch plywood is recommended. Osb may have greater shear strength the ability to span distances than comparable thickness of plywood.

18mm was initially chosen for its strength. You need to find a sheathing with a span rating of at least 32 16 which means either 15 32 or 1 2 thick osb.

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