Osb Sheathing Thickness For Roofs

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.

Osb sheathing thickness for roofs.

For pricing and availability. For pricing and availability. A homeowner recently wrote and asked me the following regarding osb roof decking. For rafters spaced 20 or more inches apart 1 2 or 5 8 inch plywood is recommended.

Panel thickness will also affect permeability using the 2 perm variable of 7 16ths osb sheathing at 3 4 thickness the permeability drops to 2 3rds of a perm. For heavier loads a 40 20 rated panel 19 32 or 5 8 will support a 130 psf live load and 48 24 rated panels 23 32 or are good to175 psf. Keep in mind that the load of the roof still plays a role in the plywood thickness. For the curious 7 16 osb has a span rating of 24 16 and with supports every 24 inches is good for a roof live load of 40 psf pounds per square foot with a 10 psf dead load.

Osb sheathing 15 32 cat ps2 10 osb sheathing application as 4 x 8. Oriented strand board commonly referred to as osb is a type of engineered lumber similar to particle board formed by adding adhesives and then compressing layers of wood strands. Thermostat 7 16 cat ps2 10 osb sheathing application as 4 x 8. A flatter roof with rafters farther apart may need a thickness of up to inch.

Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb. The most common rafter spacing is 24 inches and 5 8 inch plywood is recommended for that. Plywood s advantage over osb. Using osb osb comes in 4 by 8 foot sheets as does plywood but the manufacturing process allows the production of longer and wider ones.

With edge support and the same snow load 3 8 inch osb can be used. Many homes have rafters that are even wider at 24 inches apart and will require a thicker sheet of plywood. Thicknesses range from 5 16 to 3 4 inch and the proper one. That in a nutshell is the one big advantage plywood holds over osb.

It will support roof. When this is the case experts recommend a 5 8 inch thick sheet. Osb is widely used as roof decking material.