Intent 1:
To limit the probability of an inadequate level
of performance for windows, doors and skylights, which could lead
to failure of the windows, doors and skylights with respect to their
resistance to:
- precipitation into interior space,
- leakage of air induced by air pressure difference due
to wind loads,
- damage or structural failure due to snow loads on skylights
or where windows have sloped or near-horizontal components,
- infestation by insects and vermin, or
- excessive force required for operation of windows, doors
and skylights.
This is to limit the probability of:
- the inadequate control of temperatures of interior spaces,
drafts, relative humidity, or water accumulation,
- the generation of pollutants from biological growth
or from materials that become unstable on wetting,
- condensation on the surface of building elements and
within assemblies, 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,
- the inadequate thermal comfort of persons, and
- contact with moisture.
This is to limit the probability of harm to persons.