Osb Which Side Up Roofing

The textured surface helps flashing and waterproof underlay stay in place effectively.

Osb which side up roofing.

I m halfway though sheeting the roof of my shipping container shop and already need to redo some of it. 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. 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. Install osb textured side up.

Watch this now to learn how to avoid this same pr. The screened surface also provides a little more traction for construction workers during installation. By michael logan oriented strand board or osb is a sheet panel product similar to plywood made from layers of wood strands that are oriented in opposite directions. The resistance of osb to rot depends on the material from which it is made.

Be particular about your framing you cannot install your osb sheathing directly. One side has a polyurethane coating that shields the object from natural elements such as moisture but the opposite side does not have a finish at all. Sheets made from aspen or poplar which are common have more rot susceptibility than those made from rot resistant. Avoid putting osb on wet roof trusses.

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.