Roof Sheathing Plywood Or Osb

Home at current prices would cost about 700 more with plywood than osb.

Roof sheathing plywood or osb.

Sheets of 7 16 inch thick with no edge support can be used in an area where the snow load is 30 pounds per square foot. 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. With edge support and the same snow load 3 8 inch osb can be used. 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.

Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb. Osb is lightweight relatively inexpensive and strong enough to resist bending or breaking should someone walk on the roof. Plywood is made with an odd number of layers for optimal strength and performance. In the u s roof sheathing is almost always composed of wood usually osb oriented strand board or plywood.

Roof sheathing or decking is one of those elements. 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. One of the nice things about plywood is the variety of options you can buy. Sheathing a 2 400 sq.

Osb boasts a more consistent density. 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. 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.