Roof Sheathing Plywood Or Osb

Osb is lightweight relatively inexpensive and strong enough to resist bending or breaking should someone walk on the roof.

Roof sheathing plywood or osb.

Up until 2000 plywood held the majority of the market for wall roof and floor sheathing when it was surpassed by osb which as of 2018 held about 75 of the market share. Plywood subflooring 3 8 plywood plywood roof sheathing 3 4 plywood 4x8 3 4 sheathing plywood 48 24 sheathing plywood. Osb panels can be manufactured in lengths up to 16 feet or sometimes even higher while plywood is generally limited to 8 to 10 feet. Get free shipping on qualified plywood sheathing osb waferboard sheathing plywood or buy online pick up in store today in the lumber composites department.

One of the nice things about plywood is the variety of options you can buy. Roof sheathing or decking is one of those elements. Plywood is a bit more expensive but is usually stronger and is often selected in cases where the roof covering is heavier such as for slate clay or concrete tile roofs. Oriented strand board isn t plywood nor is it a type of particleboard fiberboard or wafer board and although it is a newcomer to a plywood dominated market its use for exterior sheathing is.

With edge support and the same snow load 3 8 inch osb can be used. Sheathing a 2 400 sq. In the u s roof sheathing is almost always composed of wood usually osb oriented strand board or plywood. Both types of panels contain phenol formaldehyde in the adhesive osb also contains isocyanurate resin but neither contains the urea formaldehyde which is quite toxic to humans.

While a sheet of plywood might be 5 to 7 plies thick a sheet of osb is made from as many as 50 strand layers packed and compressed into the same thickness. Plywood is made with an odd number of layers for optimal strength and performance. Home at current prices would cost about 700 more with plywood than osb.