Installing Osb Roof Decking

Continue the woodworking project by fitting the plywood sheeting.

Installing osb roof decking.

A homeowner recently wrote and asked me the following regarding osb roof decking. 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. Check the nailing surface is level step 2.

Fitting the roof decking. Properly fasten panels including fastening and spacing hints step 4. 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. In order to get a professional result we recommend you to use 3 4 tongue and groove plywood sheets.

Install osb textured side up. When you intend to install osb sheaths try to determine the breadth or the ideal measurement of your choice of material. The minimum osb panel size is 24 inches in any direction and each sheet end must rest on a rafter. Curved or uneven roof trusses will cause osb roof sheathing to warp or buckle under roof coverings.

This is usually a prerequisite in building codes. Cover sheathing with. Drill pilot holes trough the rafters and insert the screws into the shed rafters after aligning the overhang at both ends. You may choose between sheets that measure half an inch or 3 4 of an inch thick.

The textured surface helps flashing and waterproof underlay stay in place effectively. Provide a 1 8 inch gap. Osb is widely used as roof decking material. Osb sheathing has different textures on both sides as well.

Ventilate the roof according to current building codes step 3. Oriented strand board commonly referred to as osb is a type of engineered lumber similar to particle board formed by adding adhesives and then compressing layers of wood strands. Avoid installing osb with the textured side down. The screened surface also provides a little more traction for construction workers during installation.

Avoid putting osb on wet roof trusses.