ARCHIVED - 5.6.1.2.(3)

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5.6.1.2.(3)


Objective	OH1 Indoor Conditions
Attribution	[F61-OH1.1,OH1.2,OH1.3]
Application	Application 1: Grades of eastern white cedar shingles installed to provide protection from precipitation on sloped or horizontal assemblies exposed to precipitation. This applies to building materials, components, assemblies and their interfaces described in Sentence 5.1.2.1.(1) that are installed in buildings to which Part 5 applies [see Sentence 1.3.3.2.(1) of Division A for application of Part 5]. Application 2: This also applies to cladding assemblies installed on buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9] where: the cladding assembly is not addressed in Section 9.27., or the cladding assembly does not comply with the prescriptive requirements of Section 9.27. Exceptions: except as stated in: Sentence 5.6.1.1.(2), which applies where it can be shown that a lack of protection from precipitation ingress will not adversely affect health, safety, the intended use of the building or the operation of building services, and Sentence 5.6.1.2.(4), which applies where eastern white cedar shingles are installed as undercoursing.
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Intent	Intent 1: To limit the probability of defects such as knots, holes, decay, shake, wane and checks, crimps and sapwood, which could lead to a reduction in the watertightness of shingles, which could lead to precipitation ingress. This is to limit the probability of: the inadequate control of relative humidity or water accumulation, the generation of pollutants from biological growth or from materials that become unstable on wetting, or deterioration, which could lead to compromised integrity of environmental separators. 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.
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