1. OH1
  2. OS2
  3. OP2


OH1 Indoor Conditions



Intent 1:

To limit the probability that the performance of drain tiles or drain pipes will fall significantly below expectations, with respect to:

  • strength (e.g. tensile, compressive, impact, hydrostatic, flexural),
  • resistance to deterioration (e.g. due to freeze-thaw stresses, chemical attack, corrosion),
  • the integrity of connections, or
  • permeance (of perforated products).

This is to limit the probability of excessive moisture loading on foundation walls and basement floors, which could lead to:

  • the ingress of moisture from the ground, or
  • compromised thermal performance of components intended to provide resistance to heat transfer.

This is to limit the probability of:

  • an inadequate control of the temperature of interior spaces, relative humidity, or water ingress and 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 elements protected by the environmental separators.

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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