Intent 1:
To limit the probability that the installation of
windows, doors, and skylights will fall significantly below expectations,
which could lead to:
- inadequate fastening of frames to the structure,
- inadequate mulling of combination units, or
- inadequate selection of fasteners.
This is to limit the probability of:
- inadequate control of air leakage,
- precipitation into interior space,
- structural damage due to wind loads or snow loads on
skylights or where windows have sloped or near-horizontal components,
or
- 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.
This is to limit the probability of:
- water accumulation or condensation on the surface of
building elements and within assemblies,
- 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.