9.27.5.7.(1)

Intent 1:

To limit the probability of an inadequate withdrawal and lateral resistance, which could lead to inadequate support for cladding to resist gravity loads and lateral wind loads.

This is to limit the probability of the displacement of cladding, trim and flashing, opening of joints or failure of caulking, which could lead to:

• precipitation or meltwater ingress, or
• compromised thermal performance of components intended to provide resistance to heat transfer.

This is to limit the probability of:

• an inadequate control of temperatures 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 exterior walls or elements protected by exterior walls, 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.

Intent 2:

To limit the application of Sentence 9.27.5.7.(2) to cladding types other than wood shingles or shakes, where a lesser penetration of fasteners into framing can be justified.