Osb Roof Sheathing Thickness Canada

In addition design values for osb construction sheathing are listed in csa o86 allowing for engineering design of roof sheathing wall sheathing and floor sheathing using osb conforming to csa o325.

Osb roof sheathing thickness canada.

Or for floor sheathing over supports spaced up to 16 inches o c. Sheathing conforming to csa o325 is referenced in part 9 of the national building code of canada nbc. The second number is the maximum o c. That in a nutshell is the one big advantage plywood holds over osb.

For pricing and availability. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame. Thicknesses range from 5 16 to 3 4 inch and the proper. The most common rafter spacing is 24 inches and 5 8 inch plywood is recommended for that.

Thickness or rating 1 the thickness or rating of roof sheathing on a flat roof used as a walking deck shall conform to either table 9 23 14 5 a. The ontario building code thickness or rating 9 23 15 7. 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. The greater ability a wall has to dry the more durable it will be and everyone.

Sheathing should be a minimum of 19 32 inch thick. 2 the thickness or rating of roof sheathing on a roof not used as a walking deck shall conform to either table 9 23 15 7 a. Spacing in inches for roof sheathing. The span rating on floor span panels appears as a single.

For pricing and availability. Support spacing when the panel is used for subflooring. For rafters spaced 20 or more inches apart 1 2 or 5 8 inch plywood is recommended. The thickness required by josh s circumstances are good for roof snow loads of up to 70 psf again spanning 24.

8d ring shank nails should be used instead. Never attach roof sheathing with staples. A panel marked 32 16 may be used for roof sheathing over supports spaced up to 32 inches o c. Plywood s advantage over osb.

Thermostat 7 16 cat ps2 10 osb sheathing application as 4 x 8. Osb comes in 4 by 8 foot sheets as does plywood but the manufacturing process allows the production of longer and wider ones.