Back9.18.3.1.(3)

ATTRIBUTION:

Functional Statement:

F62

To facilitate the dissipation of water and moisture from the building.

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.

Objective:

OH1.1, OH1.2, OH1.1, OH1.2

 

APPLICATION:

Vents for unheated crawl spaces whose exterior walls have less than 25% of their total area above exterior ground level open to the outdoors, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].

INTENT:

To limit the probability of:
  • inadequate ventilation, which could lead to high relative humidity and the accumulation of moisture,
  • insect infestation, or
  • the ingress of precipitation.
This is to limit the probability of:
  • the generation of pollutants from biological growth or from materials that become unstable on wetting, or
  • deterioration, which could lead to compromised integrity of environmental separators or of elements protected by the separators.
This is to limit the probability of negative effects on the air quality of indoor spaces, which could lead to harm to persons.

ATTRIBUTION:

Functional Statement:

F61

To resist the ingress of precipitation, water or moisture from the exterior or from the ground.

F62

To facilitate the dissipation of water and moisture from the building.

F42

To resist the entry of vermin and insects.

Objective:

OS2.3

 

APPLICATION:

Vents for unheated crawl spaces whose exterior walls have less than 25% of their total area above exterior ground level open to the outdoors, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].

INTENT:

To limit the probability of:
  • inadequate ventilation, which could lead to high relative humidity and the accumulation of moisture,
  • insect infestation, or
  • the ingress of precipitation.
This is to limit the probability of deterioration, which could lead to compromised structural integrity of building components, which could lead to harm to persons.

ATTRIBUTION:

Functional Statement:

F42

To resist the entry of vermin and insects.

Objective:

OH2.3, OH2.5

 

APPLICATION:

Vents for unheated crawl spaces whose exterior walls have less than 25% of their total area above exterior ground level open to the outdoors, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].

INTENT:

To limit the probability of inappropriately designed vents, which could lead to the ingress of insects or vermin, which could lead to unsanitary conditions, which could lead to harm to persons.