Intent 1:
To limit the probability that crawl spaces will
not perform adequately as warm-air plenums, which could lead to the
inadequate heating of the upper storeys of buildings, which could
lead to:
- an inadequate control of the temperature of interior
spaces, or
- condensation, which could lead to the generation of
pollutants from biological growth or from materials that become unstable
on wetting.
This is to limit the probability of:
- negative effects on the air quality of indoor spaces,
and
- the inadequate thermal comfort of persons.
This is to limit the probability of harm to persons.