Intent 1:
To limit the probability of inadequate thickness
of foamed plastic insulation that also serves as the vapour barrier,
which could lead to uncontrolled water vapour diffusion into insulated
assemblies.
This is to limit the probability of:
- condensation, 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 or relative humidity,
- the generation of pollutants from biological growth
or from materials that become unstable on wetting, or
- deterioration, which could lead to compromised integrity
of assemblies acting as environmental separators.
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.