ARCHIVED - 9.27.3.8.(2)

This information has been archived because it is outdated and no longer relevant.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

9.27.3.8.(2)


Objective	OH1 Indoor Conditions
Attribution	(a),(b)(ii),(c)(i) [F61-OH1.1,OH1.2,OH1.3] Applies to detailing of horizontal joints.
Application	Application 1: Flashing for horizontal joints in cladding, and where cladding substrates change and the substrates differ sufficiently for stresses to be concentrated along the horizontal line of change, in cladding assemblies to which Subsection 9.27.3. applies [see Article 9.27.1.1. for application of Subsection 9.27.3.], and: where the upper cladding units overlap the lower cladding units by not less than 25 mm, where the horizontal detail is constructed so as to minimize the ingress of precipitation into the air space, or for horizontal joints in stucco, where the joint is finished with an expansion-contraction strip.
	Top of Page
Intent	Intent 1: To limit the probability of precipitation or meltwater ingress at horizontal joints between cladding elements. This is to limit the probability of: compromised thermal performance of components intended to provide resistance to heat transfer, which could lead to an inadequate control of the temperature of interior spaces or relative humidity, the generation of pollutants from biological growth or from materials that become unstable on wetting, or deterioration, which could lead to compromised integrity of exterior walls or elements protected by exterior walls. 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. Intent 2: To limit the application of Sentence 9.27.3.8.(1), where the wall assembly is constructed such that: precipitation or meltwater ingress at horizontal joints will be minimized, or moisture that bypasses the cladding will be dissipated.
	Top of Page