Osb Which Side Up Roofing

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 which side up roofing.

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 textured surface helps flashing and waterproof underlay stay in place effectively. The resistance of osb to rot depends on the material from which it is made. 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.

Builders use osb to sheath. Osb sheathing has different textures on both sides as well. Sheets made from aspen or poplar which are common have more rot susceptibility than those made from rot resistant. Watch this now to learn how to avoid this same pr.

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

The screened surface also provides a little more traction for construction workers during installation.