9.26.11.1.(1)

Objective

OH1 Indoor Conditions

Attribution

Intent

Intent 1:

To limit the probability of:

  • slow evaporation of solvents, which could lead to the formation of blisters, which could lead to compromised watertightness of membranes,
  • softening on exposure to heat from the sun, or
  • flow under gravity, which could lead to membrane slippage and insufficient thickness at high points of roofs.

This is to limit the probability of compromised continuity or water resistance of membranes, which could lead to:

  • 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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