Roof Sheathing Thickness Ontario

Sheathing should be a minimum of 19 32 inch thick.

Roof sheathing thickness ontario.

Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively. That in a nutshell is the one big advantage plywood holds over osb. Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7. 1 inch 25 4 mm.

Loads will vary with the pitch of the roof. 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. 8d ring shank nails should be used instead. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads.

Plywood s advantage over osb. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame. 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. For sub floor s.

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. The ontario building code thickness rating and material standards 9 23 16 2. Never attach roof sheathing with staples. The ontario building code thickness or rating.

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. Cgsb ca cgsb 37 54 polyvinyl chloride roofing and waterproofing membrane national building code of canada 2005.