Intent 1:
To limit the probability that the airtightness of
the installed materials will be inadequate for the control of:
- heat loss or gain due to air mass transfer,
- air infiltration and exfiltration,
- airborne vapour transfer from the interior above ground
and from the exterior below ground,
- precipitation ingress due to air pressure differences,
or
- the condensation of moisture from interior spaces on
interior surfaces or within assemblies.
This is to limit the probability of:
- pollutant ingress, including soil gas, combustion products
from parking garages, and particulates,
- the inadequate control of temperatures of interior spaces,
drafts, indoor relative humidity, or
- water accumulation.
This is to limit the probability of:
- the generation of pollutants from biological growth,
or from materials that become unstable on wetting, or
- deterioration, further compromising the integrity of
the separator.
This is to limit the probability of:
- negative effects on the air quality of indoor spaces,
- the inadequate thermal comfort of persons, or
- contact with moisture.
This is to limit the probability of harm to persons.