Osb Roof Sheathing Thickness Canada

The wafers or strands used in the manufacture of osb are generally up to 150 mm 6 in long in the grain direction 25 mm 1 in wide and less than 1 mm 1 32 in thickness.

Osb roof sheathing thickness canada.

A panel marked 32 16 may be used for roof sheathing over supports spaced up to 32 inches o c. Osb sheathing 15 32 cat ps2 10 osb sheathing application as 4 x 8. Thermostat 7 16 cat ps2 10 osb sheathing application as 4 x 8. The thickness required by josh s circumstances are good for roof snow loads of up to 70 psf again spanning 24.

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. Or for floor sheathing over supports spaced up to 16 inches o c. Thicknesses range from 5 16 to 3 4 inch and the proper one to use. In canada osb panels are manufactured to meet the requirements of the csa o325 standard.

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. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame. Never attach roof sheathing with staples. And remember that those are the higher of the estimated perm numbers and the best case scenario once a weather barrier is on.

Osb comes in 4 by 8 foot sheets as does plywood but the manufacturing process allows the production of longer and wider ones. 8d ring shank nails should be used instead. Sheathing should be a minimum of 19 32 inch thick. Plywood s advantage over osb.

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. For pricing and availability. 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. The typical thickness range for sheathing is 3 8 to 3 4 inch.