ARCHIVED - 9.26.3.1.(1)

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9.26.3.1.(1)


Objective	OH1 Indoor Conditions
Attribution	[F20,F61,F80-OH1.1,OH1.2,OH1.3]
Application	Application 1: Slopes on which roof coverings may be applied 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 9.26.3.1.(2), which applies to asphalt and gravel roofing, and coal tar and gravel roofing provided with effective drainage by roof drains located at the lowest points on the roofs or constructions that serve as roofs, and Sentence 9.26.3.1.(3), which applies to profiled metal roof cladding systems specifically designed for low-slope applications.
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Intent	Intent 1: To limit the probability of: for minimum slope requirements, an insufficient slope of the roof or construction that serves as a roof, which could lead to inadequate drainage or water pooling, which could lead to: water accumulation, which could lead to damage to roofing material, which could lead to the deterioration of roofing, or water ingress at roofing joints, and for maximum slope requirements, an excessive slope of the roof or construction that serves as a roof, which could lead to damage to roofing membranes from gravity-induced loads, which could lead to: compromised moisture protection, or accelerated deterioration. This is to limit the probability of the premature failure of roofing, which could lead to precipitation or meltwater ingress. 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, deterioration, which could lead to compromised integrity of roofs or assemblies protected by roofs, 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.
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