Osb Roof Sheathing Thickness

I ve never used commodity osb on a roof but it s probably fine in 5 8 thickness and possibly in 1 2 thickness.

Osb roof sheathing thickness.

Page 6 of 7 v1 0 01 2008 osb roof design example calculations using asd 4x8 foot 24 16 teco sheathing span. 1 inch 25 4 mm. Allowable spans for lumber floor and roof sheathing a b for si. Thermostat 7 16 cat ps2 10 osb sheathing application as 4 x 8.

With this thickness any deflection under dead loads only the weight of materials only should prove to be imperceptible. 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. Cdx works fine in 1 2 or 5 8 thickness. Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb.

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. Osb sheathing 15 32 cat ps2 10 osb sheathing application as 4 x 8. 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.

With edge support and the same snow load 3 8 inch osb can be used. Some roofers or manufacturers don t like to install over skip sheathing but i ve never had a problem with it locally. Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7. For pricing and availability.

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.