How To Sheet A Roof With Osb

Both cdx plywood and osb tend to come in standard sheets of four foot by eight foot 4 8.

How to sheet a roof with osb.

To find the amount of plywood needed to cover a roof start by finding the area of the roof. Avoid butting osb panels tightly. It is generally believed that osb is cheaper than plywood. 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.

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. 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. Install the roofing screws vertically along each rib in the panel. Stagger the panels over the roof with 2 supports between panel ends.

Talking about plywood or osb for roofing you cannot miss the information of the cost. However you might find that osb can better suit your needs than plywood for the roof. For plywood it is like 5 to 10 more expensive. It is true as the price of every osb board is around 15 20 per sheet 4 8 sizes.

Osb comes in 4 by 8 foot sheets as does plywood but the manufacturing process allows the production of longer and wider ones. Be sure the larger edge is laid so that the small edge of the next panel will overlap it. Osb is lightweight relatively inexpensive and strong enough to resist bending or breaking should someone walk on the roof. Thicknesses range from 5 16 to 3 4 inch and the proper.

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. Because of its construction some manufacturers actually make larger sheets of osb. Find the area of a roof. Lay sheets in rows with the long edge horizontal to the roof bottom.

Provide a 1 8 inch gap. The minimum osb panel size is 24 inches in any direction and each sheet end must rest on a rafter. Fortunately this is one issue that has primarily been standardized by the industry. Leave a 3 mm 1 8 inch gap between the osb panels to allow for expansion.