How To Sheet A Roof With Osb

Osb is lightweight relatively inexpensive and strong enough to resist bending or breaking should someone walk on the roof.

How to sheet a roof with osb.

It is generally believed that osb is cheaper than plywood. The minimum osb panel size is 24 inches in any direction and each sheet end must rest on a rafter. Leave a 3 mm 1 8 inch gap between the osb panels to allow for expansion. Find the area of a roof.

Plywood is a bit more expensive but is usually stronger and is often selected in cases where the roof covering is heavier such as for slate clay or concrete tile roofs. To find the amount of plywood needed to cover a roof start by finding the area of the roof. Because of its construction some manufacturers actually make larger sheets of osb. Avoid butting osb panels tightly.

For plywood it is like 5 to 10 more expensive. Provide a 1 8 inch gap. It is true as the price of every osb board is around 15 20 per sheet 4 8 sizes. Fortunately this is one issue that has primarily been standardized by the industry.

Stagger the panels over the roof with 2 supports between panel ends. Lay sheets in rows with the long edge horizontal to the roof bottom. Osb roof panels should always be installed with the grade stamp facing into the attic and the screened surface with the nail guide lines facing up. Osb comes in 4 by 8 foot sheets as does plywood but the manufacturing process allows the production of longer and wider ones.

Once the area is known divide by the area of a 4 8 sheet to find how much sheathing is needed. Roof trusses must be dry when sheathing a roof with osb to prevent mold growth in the roof and coverage gaps as the trusses dry and shrink. However you might find that osb can better suit your needs than plywood for the roof. 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.

Install the roofing screws vertically along each rib in the panel. Both cdx plywood and osb tend to come in standard sheets of four foot by eight foot 4 8. Thicknesses range from 5 16 to 3 4 inch and the proper. Talking about plywood or osb for roofing you cannot miss the information of the cost.