ARCHIVED - 9.27.5.3.(1)

This information has been archived because it is outdated and no longer relevant.

Archived Content

Information identified as archived on the Web is for reference, research or recordkeeping purposes. It has not been altered or updated after the date of archiving. Web pages that are archived on the Web are not subject to the Government of Canada Web Standards. As per the Communications Policy of the Government of Canada, you can request alternate formats on the "Contact Us" page.

9.27.5.3.(1)


Objective	OH1 Indoor Conditions
Attribution	[F20-OH1.1,OH1.2,OH1.3]
Application	Application 1: Minimum dimensions of furring applied over sheathing for the attachment of cladding, on buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9]. Exceptions: except as stated in: Sentence 9.27.5.1.(5), which applies to double-course wood shingles or shakes that are permitted to be attached to a wood lath not less than 38 mm by 9.5 mm thick, over sheathing that is securely nailed to the framing, and applied as described in Article 9.27.7.5., and Sentence 9.27.5.1.(6), which applies to asbestos-cement shingles fastened to a wood lath not less than 89 mm by 9.5 mm thick, over sheathing that is securely nailed to the framing, and applied so that it overlaps the preceding shingle course by not less than 20 mm.
	Top of Page
Intent	Intent 1: To limit the probability of inadequate anchorage for fasteners to resist: gravity loads and lateral wind loads, or where panel-type siding is installed as bracing to satisfy Subclause 9.23.10.2.(2)(b)(i), lateral loads, which could lead to racking of exterior walls. This is to limit the probability of the displacement of cladding, trim and flashing, opening of joints or failure of caulking, which could lead to: precipitation or meltwater ingress, or compromised thermal performance of components intended to provide resistance to heat transfer. This is to limit the probability of: an inadequate control of temperatures of interior spaces or relative humidity, the generation of pollutants from biological growth or from materials that become unstable on wetting, deterioration, which could lead to compromised integrity of exterior walls or elements protected by exterior walls, or water accumulation in interior spaces. This is to limit the probability of: negative effects on the air quality of indoor spaces, the inadequate thermal comfort of persons, and contact with moisture. This is to limit the probability of harm to persons.
	Top of Page