Intent 1:
To limit the probability that the performance of
windows, doors and skylights will fall significantly below expectations
with respect to:
- resistance to air pressure loads,
- resistance to structural loads,
- resistance to water penetration loads,
- resistance to snow loads on skylights or where windows
have sloped or near-horizontal components,
- resistance to forced entry, and
- ease of operation.
This is to limit the probability of:
- excessive air leakage,
- excessive heat loss or gain,
- condensation,
- precipitation and melt water ingress,
- insufficient protection against the ingress of insects
and vermin, or
- inoperability or excessive difficulty in operating doors
and openable windows.
This is to limit the probability of:
- the inadequate control of temperatures of interior spaces,
relative humidity, drafts, or water accumulation,
- the generation of pollutants from biological growth
or from materials that become unstable on wetting,
- deterioration, which could lead to compromised integrity
of exterior wall assemblies, or
- inadequate ventilation where windows, doors and skylights
provide required non-heating-season ventilation.
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.