Roof Sheathing Thickness Osb

Oriented strand board 660663 the home depot.

Roof sheathing thickness osb.

Oriented strand board is an excellent choice for roof deck wall and subfloor sheathing. Osb roof decking thickness 7 16 1 2 or 5 8 currently we space rafters 16 oc and use 7 16 osb with h clips. Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb. Osb sheathing 15 32 cat ps2 10 osb sheathing application as 4 x 8.

Most roofs will be sheathed in plywood at least 3 8 inch thick. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads. Allowable spans for lumber floor and roof sheathing a b for si. In the u s roof sheathing is almost always composed of wood usually osb oriented strand board or plywood.

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. Loads will vary with the pitch of the roof. For pricing and availability. We re in dallas so we don t engineer for tremendous live loads for an asphalt shingle and we feel comfortable with 16 oc rafter spacing and 7 16 osb decking.

Osb is lightweight relatively inexpensive and strong enough to resist bending or breaking should someone walk on the roof. For pricing and availability. Thicknesses range from 5 16 to 3 4 inch and the proper one to use. Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7.

1 inch 25 4 mm. With edge support and the same snow load 3 8 inch osb can be used. Roof sheathing or decking is one of those elements. Osb comes in 4 by 8 foot sheets as does plywood but the manufacturing process allows the production of longer and wider ones.