Osb Or Plywood For Roof Decking

University of massachusetts meets most building codes for roof and wall sheathing.

Osb or plywood for roof decking.

Oriented strand board osb combines wood chips glue and resin into the shape of a sheet of plywood and bakes them together. For a typical 2 400 sq. Osb panels often have lines at 16 and 24 in. Both osb and plywood absolutely hate water lipinskiy mentions going on to say that the most important part regardless of which decking option you choose is that all penetration points on a roof are sealed.

It becomes soft and weak when it delaminates. Can oriented strand board osb be used for roofing. Thermostat 7 16 cat ps2 10 osb sheathing application as 4 x 8. For pricing and availability.

Plywood on the other hand is made with thin sheets of wood that have been cut from a spinning log then glued together with the grain laid out in alternating directions to maximise strength. Some panels have a textured surface which makes them less slippery when used for roof sheathing. It is often less expensive than cdx plywood because this manufacturing process doesn t require the same costly veneers found on the front and back of cdx plywood. Intervals so you know where underlying studs rafters and joists are for nailing.

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. In our area 1 2 in. Home osb is about 700 less expensive compared with plywood if used as the subfloor sheathing and roof decking. Because of the way it s constructed osb has less tendency to swell and contract with.

Osb sheathing costs a few dollars less per sheet than 1 2 in. Today you can find osb in thickness from 7 16 to 1 1 8 for different applications from roof wall subfloor i joists and everything between. For pricing and availability. Osb boasts a more consistent density.

Osb is cheaper than plywood by about 3 to 5 per panel. 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. 2x greater shear strength than similar sized plywood source. A few other downsides to plywood.

Osb has its advantages. Osb is made of small and fairly rectangular shaped wood chips from small resinous trees which are bonded into a panel form with wax and synthetic resin.