ATTRIBUTION:
Functional Statement:
F42
To resist the entry of vermin and
insects.
F61
To resist the ingress of precipitation, water or
moisture from the exterior or from the
ground.
F42
To resist the entry of vermin and
insects.
F51
To maintain appropriate air and surface
temperatures.
Objective:
OH1.1, OH1.1, OH1.2, OH1.3, OH1.1, OH1.2
INTENT:
To limit the probability of openings in environmental separators,
which could lead to:
- the ingress of precipitation,
- the ingress of insects or vermin,
- excessive heat transfer,
- condensation,
- the accumulation of moisture or the ingress of water backed
up by ice dams,
- drafts, or
- the ingress of pollutants from adjacent attic or roof spaces.
This is to limit the probability of:
- compromised thermal performance of components intended to provide
resistance to heat transfer, which could lead to 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,
- deterioration, which could lead to compromised integrity of
ceilings acting as environmental separators, or
- water accumulation in interior spaces.
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.