Roof Sheathing Thickness Ontario

For sub floor s.

Roof sheathing thickness ontario.

Never attach roof sheathing with staples. Loads will vary with the pitch of the roof. Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7. Division b part 5 page 5 11 the national building code now dictates that all flat roof deck and balcony areas are considered roofs and when specifying a pvc.

That in a nutshell is the one big advantage plywood holds over osb. 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 rating and material standards 9 23 16 2. Sheathing should be a minimum of 19 32 inch thick.

That will suffice on a roof with rafters set 16 inches apart with minimal roof loads. 8d ring shank nails should be used instead. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame. Plywood s advantage over osb.

1 inch 25 4 mm. 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. Most roofs will be sheathed in plywood at least 3 8 inch thick. The ontario building code thickness or rating.

The typical thickness range for sheathing is 3 8 to 3 4 inch. Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively.