How Thick Osb For Roof Sheathing

In the u s roof sheathing is almost always composed of wood usually osb oriented strand board or plywood.

How thick osb for roof sheathing. Roof sheathing or decking is one of those elements. With this thickness any deflection under dead loads only the weight of materials only should prove to be imperceptible. Minimum thickness most roofs will be sheathed in plywood at least 3 8 inch thick. Great choice for a professional builder.

X 95 75 in 920924 the home depot. Loads will vary with the. Tandg oriented strand board is ideal for subfloor construction and structural usage in humid conditions. It spans the rafters to support the roofing and in the case of panel sheathing such as plywood or osb it acts as a diaphragm with the walls to resist horizontal loads.

That will suffice on a roof with rafters set 16 inches apart with minimal roof loads. Roof sheathing attaches to the surface of the rafters or trusses to form the structural skin of the roof. Osb comes in 4 by 8 foot sheets as does plywood but the manufacturing process allows the production of longer and wider ones. 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.

A roof system consists of several elements working together to protect the home. Keep the 16 oc go with 1 2 osb and add an extra clip in each space. Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood. Osb is lightweight relatively inexpensive and strong enough to resist bending or breaking should.

T g oriented strand board common. Osb roof decking thickness 7 16 1 2 or 5 8. 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.