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.