Roof Sheathing Which Side Up

You just have to keep the shiny side face down.

Roof sheathing which side up.

Ensure roof trusses are in proper alignment with no curves or uneven sections when installing osb to sheathe roofs. Install osb textured side up. Comes in standard 4 by 8 foot sheets is strong durable and relatively light. One side is usually better quality than the other c in this case.

Avoid installing osb with the textured side down. The common grade of plywood for roof sheathing is cdx. Attaching the sheathing wrong side up. Foil insulation underlayment is recommended under a metal roof and in most cases the shiny side should be facing up but there s a catch.

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. Basically plywood or osb sheathing with a thin aluminum facing on one side radiant barrier sheathing installs like any other roof sheathing. A is smooth and knot free while d the lowest quality has missing knots and cracks. It should be placed up on the roof.

How to correctly install plywood or osb roof sheathing. Roof sheathing materials plywood. Aligning sheathing with the edge of the roof rather than perpendicular to the rafters. As a quick primer in plywood each side is rated from a to d.

Step 1 check the rafter ends tails you want to be sure they form a straight line. It also holds roofing nails well. Install osb panels on aligned roof trusses. Answer 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.

You might wonder why the shiny side facing down wouldn t just reflect heat back into the attic. Foil insulation is a radiant barrier and it works by. Curved or uneven roof trusses will cause osb roof sheathing to warp or buckle under roof coverings.