How Thick Should Osb For Roof

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.

How thick should osb for roof.

Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood. 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. I m halfway though sheeting the roof of my shipping container shop and already need to redo some of it. Roofing plywood sizes material wood joist and plywood or osb decking oriented strand board common 15 32 in roof decking material thickness osb or plywood for roofs walls roof deck materials to ensure a le.

With this thickness any deflection under dead loads only the weight of materials only should prove to be imperceptible. 8 tips for getting the best out of your oriented strand board osb how to install roof sheathing pro builder. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads. Required sheathing thickness for roofing important factors.

Half inch osb is suitable for rafter spacings up to 24 inches whether or not the edges are. Several factors must be considered when determining appropriate roof sheathing thickness such as the. 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. Most roofs will be sheathed in plywood at least 3 8 inch thick.

Loads will vary with the pitch of the roof. For the curious 7 16 osb has a span rating of 24 16 and with supports every 24 inches is good for a roof live load of 40 psf pounds per square foot with a 10 psf dead load. Thicknesses range from 5 16 to 3 4 inch and the proper one to use depends on the spacing of the rafters.