ARCHIVED - 5.3.1.3.(1)

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5.3.1.3.(1)


Objective	OH1 Indoor Conditions
Attribution	[F51,F63-OH1.1]
Application	Application 1: Occurences of discontinuity in materials that are installed to provide resistance to heat transfer through building components and assemblies 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 the position of low air and vapour permeance materials within the building assembly relative to the position of materials providing thermal resistance in the assemblies of buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9], where the building assembly: incorporates low permeance materials that act as other than cladding or that are installed on the warm side of the assembly, and is more susceptible to condensation [see Sentences 9.25.1.2.(4) and (5) for combinations of interior and exterior environmental conditions that create a higher risk for condensation]. Exceptions: except as stated in Sentence 5.3.1.1.(2), which applies where a lack of resistance to heat transfer will not adversely affect health, safety, the intended use of the building or the operation of building services.
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Intent	Intent 1: To limit the probability of the inadequate control of heat transfer through environmental separators under expected environmental loads, which could lead to: excessive heat loss or gain, or condensation. This is to limit the probability of: the generation of pollutants from biological growth or from materials that become unstable on wetting, or deterioration, which could lead to compromised integrity of the separators. This is to limit the probability of negative effects on the air quality of indoor spaces, which could lead to harm to persons.
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