How To Sheet A Roof With Osb

Avoid butting osb panels tightly.

How to sheet a roof with osb.

Fortunately this is one issue that has primarily been standardized by the industry. 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. Both cdx plywood and osb tend to come in standard sheets of four foot by eight foot 4 8. Stagger the panels over the roof with 2 supports between panel ends.

Provide a 1 8 inch gap. Install the roofing screws vertically along each rib in the panel. Osb comes in 4 by 8 foot sheets as does plywood but the manufacturing process allows the production of longer and wider ones. Talking about plywood or osb for roofing you cannot miss the information of the cost.

For plywood it is like 5 to 10 more expensive. Be sure the larger edge is laid so that the small edge of the next panel will overlap it. It is true as the price of every osb board is around 15 20 per sheet 4 8 sizes. 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.

Thicknesses range from 5 16 to 3 4 inch and the proper. Osb is lightweight relatively inexpensive and strong enough to resist bending or breaking should someone walk on the roof. Because of its construction some manufacturers actually make larger sheets of osb. The minimum osb panel size is 24 inches in any direction and each sheet end must rest on a rafter.

However you might find that osb can better suit your needs than plywood for the roof. Align the first metal roofing panel so that it overlaps the edging by 1 2 to 3 4 of an inch and is square to the roof line. Once the area is known divide by the area of a 4 8 sheet to find how much sheathing is needed. 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.

When the grade stamp is covered by roofing the building inspector will not be able to confirm that the correct osb roofing panel was used. To find the amount of plywood needed to cover a roof start by finding the area of the roof. It is generally believed that osb is cheaper than plywood. Find the area of a roof.