Osb Sheathing For A Roof

You can have an osb that s larger than your plywood.

Osb sheathing for a roof.

Unlike other materials an osb has a squarer and smaller dimension. 2 perm 7 16 osb sheathing with a 30 perm wrb results in 1 88 perms. 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. In the u s roof sheathing is almost always composed of wood usually osb oriented strand board or plywood.

A homeowner recently wrote and asked me the following regarding osb roof decking. Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb. Osb is lightweight relatively inexpensive and strong enough to resist bending or breaking should. 2 perm 7 16 osb sheathing with a 5 perm wrb results in 1 43 perms.

For pricing and availability. Suitability for roof sheathing. A roof system consists of several elements working together to protect the home. Multiply the length of the roof in feet by the width of the roof in feet to find the area of the roof in square feet.

Not just that but most an osb is manufactured in different sizes. For pricing and availability. Osb is widely used as roof decking material. Both the national roofing contractors association and the asphalt roofing manufacturers association recommend the use of osb for roof sheathing as long as it bears.

Once the area is known divide by the area of a 4 8 sheet to find how much sheathing is needed. You can use an osb as a subfloor for sheathing roof decking and more. With edge support and the same snow load 3 8 inch osb can be used. Thermostat 7 16 cat ps2 10 osb sheathing application as 4 x 8.

That may not seem like a lot but when you are that close to the danger zone a 24 difference in permeability between final products is worthy of note. To find the amount of plywood needed to cover a roof start by finding the area of the roof. Before lumber companies began selling osb the standard choice for sheathing a roof with a 24 inch rafter spacing was 1 2 inch cdx plywood the letters cdx indicate that it is construction grade. Roof sheathing or decking is one of those elements.

Find the area of a roof.