Osb Thickness For Roof Sheathing

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 thickness for roof sheathing.

Osb comes in 4 by 8 foot sheets as does plywood but the manufacturing process allows the production of longer and wider ones. 1 inch 25 4 mm. Osb sheathing 15 32 cat ps2 10 osb sheathing application as 4 x 8. Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb.

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. With this thickness any deflection under dead loads only the weight of materials only should prove to be imperceptible. For pricing and availability.

The most common rafter spacing is 24 inches and 5 8 inch plywood is recommended for that. 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. Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively. Allowable spans for lumber floor and roof sheathing a b for si.

However you might find that osb can better suit your needs than plywood for the roof. For pricing and availability. Roof sheathing thickness unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick. That s considered to be the minimum.

This minimum will only work if the rafters are set 16 inches apart at most and if the roof doesn t have too much load. They can range from the standard 4 x 8 piece to a 4 x 9 or even a 4 x 10. Thermostat 7 16 cat ps2 10 osb sheathing application as 4 x 8. For rafters spaced 20 or more inches apart 1 2 or 5 8 inch plywood is recommended.

Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7. It will support roof.