Installing Osb Roof Decking

Lay sheets in rows with the long edge horizontal to the roof bottom.

Installing osb roof decking.

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. Ventilate the roof according to current building codes step 3. Check the nailing surface is level step 2. The textured surface helps flashing and waterproof underlay stay in place effectively.

Fitting the roof decking. Osb sheathing has different textures on both sides as well. The screened surface also provides a little more traction for construction workers during installation. A homeowner recently wrote and asked me the following regarding osb roof decking.

Cover sheathing with. Avoid putting osb on wet roof trusses. 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.

This instructional video covers how to store space and fasten osb oriented strand board roof sheathing including radiant barrier roof sheathing. Install osb textured side up. 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. Drill pilot holes trough the rafters and insert the screws into the shed rafters after aligning the overhang at both ends.

And scroll down to see more details on each with installation hints and tips below. In order to get a professional result we recommend you to use 3 4 tongue and groove plywood sheets. 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. Provide a 1 8 inch gap.

Properly fasten panels including fastening and spacing hints step 4. Continue the woodworking project by fitting the plywood sheeting. The minimum osb panel size is 24 inches in any direction and each sheet end must rest on a rafter. 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.

Avoid installing osb with the textured side down.