Osb Roof Sheathing Thickness

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.

Osb roof sheathing thickness.

A flatter roof with rafters farther apart may need a thickness of up to inch. In the u s roof sheathing is almost always composed of wood usually osb oriented strand board or plywood. Keep in mind that the load of the roof still plays a role in the plywood thickness. When this is the case experts recommend a 5 8 inch thick sheet.

With edge support and the same snow load 3 8 inch osb can be used. With this thickness any deflection under dead loads only the weight of materials only should prove to be imperceptible. Watch this now to learn how to avoid this same pr. Osb comes in 4 by 8 foot sheets as does plywood but the manufacturing process allows the production of longer and wider ones.

Osb is lightweight relatively inexpensive and strong enough to resist bending or breaking should someone walk on the roof. 1 inch 25 4 mm. 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. Thicknesses range from 5 16 to 3 4 inch and the proper one to use.

Allowable spans for lumber floor and roof sheathing a b for si. Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb. Minimum thickness most roofs will be sheathed in plywood at least 3 8 inch thick. Loads will vary with the.

What size plywood for the roof. I m halfway though sheeting the roof of my shipping container shop and already need to redo some of it. Roof sheathing or decking is one of those elements.