Osb Or Plywood For Roof Sheathing

Thermostat 7 16 cat ps2 10 osb sheathing application as 4 x 8.

Osb or plywood for roof sheathing. University of massachusetts meets most building codes for roof and wall sheathing. Many contractors will use osb for roofing and subfloors. Plywood used for roof decking is typically called sheathing and. 2x greater shear strength than similar sized plywood source.

When used as a roof sheathing this tendency to hold moisture means it can degrade faster than plywood when exposed to chronic leaks. 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. In 2001 oriented strand board surpassed plywood in terms of square footage produced. Osb is much more waterproof than plywood and cdx plywood.

For pricing and availability. 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. When building a house osb makes for excellent sheathing. For pricing and availability.

Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb. Sheathing a 2 400 sq. When osb does get wet it also tends to swell along the edges and those edges stay swollen even after the material has dried out. With edge support and the same snow load 3 8 inch osb can be used.

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. There are even variants of osb that come with building wrap already in place so installation is as easy as taping the seams together. 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. The most common materials for this are oriented strand board osb or plywood both formed of layers of wood bonded into a panel.

Osb takes longer to get wet than plywood but also takes longer to dry out. Home at current prices would cost about 700 more with plywood than osb.