What is the strong layer of wood that is connected to the top of rafters or trusses that is usually made of plywood or OSB?

Also known as roof decking, roof sheathing is the layer of boards on top of the rafters or trusses. This layer provides an additional layer of strength for the roof, and can help prevent leaks. Shingles will be attached on top of this layer.

Asked by Jason Forbes · Last updated 5 years ago · 144.4K views · SOURCE