Osb Roof Sheathing Thickness

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Osb roof sheathing thickness.

Keep in mind that the load of the roof still plays a role in the plywood thickness. 1 inch 25 4 mm. Roof sheathing or decking is one of those elements. Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively.

A flatter roof with rafters farther apart may need a thickness of up to inch. With this thickness any deflection under dead loads only the weight of materials only should prove to be imperceptible. Allowable spans for lumber floor and roof sheathing a b for si. Loads will vary with the.

With edge support and the same snow load 3 8 inch osb can be used. In the u s roof sheathing is almost always composed of wood usually osb oriented strand board or plywood. When this is the case experts recommend a 5 8 inch thick sheet. I m halfway though sheeting the roof of my shipping container shop and already need to redo some of it.

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. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads. Osb comes in 4 by 8 foot sheets as does plywood but the manufacturing process allows the production of longer and wider ones. 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.

Osb is lightweight relatively inexpensive and strong enough to resist bending or breaking should someone walk on the roof. Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb. What size plywood for the roof.