Roof Sheathing Thickness Ontario

Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame.

Roof sheathing thickness ontario.

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. Plywood s advantage over osb. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads. Our 20 yr old house has no sheathing except on the roof single storey 1600 sqft bungalow usual windows and doors 6 12 combo gable and cottage roof typical 20 yrold construction around here walls are 2 by 4 plus sm outside then vinyl siding the usual letin steel diagonal bracing on the.

Ontario building code wall sheathing requirement. The typical thickness range for sheathing is 3 8 to 3 4 inch. Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7. Cgsb ca cgsb 37 54 polyvinyl chloride roofing and waterproofing membrane national building code of canada 2005.

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 ontario building code thickness or rating. Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively. Never attach roof sheathing with staples.

That in a nutshell is the one big advantage plywood holds over osb. The ontario building code thickness rating and material standards 9 23 16 2. 8d ring shank nails should be used instead. 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.

Loads will vary with the pitch of the roof. 1 inch 25 4 mm.