Intent 1:
To limit the probability that the performance of
installed bituminous materials will fall significantly below expectations
with respect to moisture transfer resistance and airtightness in the
case of walls.
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.