9.26.11.6.(1)

Objective

OH1 Indoor Conditions

Attribution

Intent

Intent 1:

To limit the probability of:

  • an inadequate resistance to water absorption, freeze-thaw cycling, UV exposure or other deleterious environmental loads, which could lead to the premature failure of built-up roof membranes, or
  • built-up roofs with inadequate tensile strength, which could lead to splitting and tearing of the membranes under traffic loads and movement of the building structure.

This is to limit the probability of:

  • water penetrating directly to roof decking or sheathing, or
  • compromised thermal performance of components intended to provide resistance to heat transfer.

This is to limit the probability of:

  • an inadequate control of relative humidity, temperatures of interior spaces 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 roofs or assemblies protected by roofs.

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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