ARCHIVED - 9.27.3.8.(3)

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9.27.3.8.(3)


Objective	OH1 Indoor Conditions
Attribution	[F61,F62-OH1.1,OH1.2,OH1.3]
Application	Application 1: Installation of flashing over exterior wall openings through cladding assemblies to which Subsection 9.27.3. applies [see Article 9.27.1.1. for application of Subsection 9.27.3.], where the vertical distance from the bottom of the eave to the top of the trim is more than one-quarter of the horizontal overhang of the eave. Exceptions: except as stated in Sentence 9.27.3.8.(6), which applies to openings for windows and doors provided with an integral exterior flange and designed to be installed on the exterior of essentially flat lock-seam metal siding without a head or sill flashing.
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Intent	Intent 1: To limit the probability of: precipitation or meltwater ingress at the heads of openings through cladding, and an inadequate dissipation of precipitation or meltwater to the exterior, which could lead to the excessive accumulation of moisture. 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.
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