Sentence 9.13.2.2.(2)

  1. OH1
  2. OS2

Objective

OH1 Indoor Conditions

Attribution

Intent

Intent 1:

To limit the probability that:

  • the performance of bituminous dampproofing materials will fall significantly below expectations with respect to moisture transfer resistance and airtightness in the case of walls, and
  • the performance of polyethylene used as dampproofing will fall significantly below expectations with respect to
    • moisture transfer resistance, or
    • strength, flexibility, and resistance to tearing, puncturing, oxidation or ultraviolet radiation, which could lead to damage during installation.

This is to limit the probability of:

  • an inadequate resistance to moisture transfer from the ground, which could lead to the ingress of moisture from the ground, or
  • for walls, inadequate airtightness, which could lead to moisture and soil gas 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,
  • water accumulation or an inadequate control of 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 elements supported or protected by floors, foundation walls or roofs of underground structures, or
  • the ingress of soil gas.

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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