Intent 1:
To limit the probability that the installation of
field-assembled, manufactured or pre-assembled windows, doors, and
skylights will fall significantly below expectations.
This is to limit the probability of:
- premature deterioration of materials and components
used for the installation,
- condensation on the surface of building elements and
within assemblies,
- precipitation into interior space, or
- leakage of air induced by air pressure difference due
to wind loads.
This is to limit the probability of:
- structural damage due to snow loads on skylights or
where windows have sloped or near-horizontal components,
- the ingress of insects and vermin,
- excessive force required for operation of windows, doors
and skylights, which could lead to inadequate ventilation, where windows
are required for non-heating season ventilation
- 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, 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.