How Thick Should Osb Be For Roofing

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.

How thick should osb be for roofing.

That will suffice on a roof with. A roof that lays practically flat will have a much heavier load than a steeper roof that allows rain snow and ice to roll right off. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame. At least 3 8 inch thick.

Standard roof sheathing which consists of 4 by 8 sheets of plywood or oriented strand board or osb is 1 2 inch thick and attaches directly to the roof rafters or the roof trusses. With this thickness any deflection under dead loads only the weight of materials only should prove to be imperceptible. Osb roof decking thickness 7 16 1 2 or 5 8 if were using osb we get 9 16 we dont worry about getting both 7 16 and 9 16 for walls then the roof we just get all of the same. The typical thickness range for sheathing is 3 8 to 3 4 inch.

The most common materials for this are oriented strand board osb or plywood both formed of layers of wood bonded into a panel. 8d ring shank nails should be used instead. Never attach roof sheathing with staples. Osb comes in 4 by 8 foot sheets as does plywood but the manufacturing process allows the production of longer and wider ones.

Oriented strand board osb vs plywood family handyman osb roof sheathing panels georgia pacific blue ribbon 8 tips for getting the best out of your oriented strand board osb which way should you install osb on a roof norbord north roofing plywood sizes material options thickness calculations osb oriented strand board common 15 32 in x 4 ft 8 actual. Sheathing should be a minimum of 19 32 inch thick. Thicknesses range from 5 16 to 3 4 inch and the proper. However you may need to consider bolstering the plywood thickness for a roof that has a higher load.

The thickness required by josh s.