Back9.19.2.1.(3)

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

 

APPLICATION:

Closures for access hatches to attic or roof spaces that measure:
  • not less than 3 m2 in area,
  • not less than 1 m in length or width, and
  • not less than 600 mm in height over an area that is not less than 3 m2 and not less than 1 m in length or width.
This applies where access to attic or roof spaces is:
  • from the exterior,
  • from interior heated space, or
  • from unheated enclosed space (e.g. garage).
This applies 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 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.

ATTRIBUTION:

Functional Statement:

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:

OS2.3

 

APPLICATION:

Closures for access hatches to attic or roof spaces that measure:
  • not less than 3 m2 in area,
  • not less than 1 m in length or width, and
  • not less than 600 mm in height over an area that is not less than 3 m2 and not less than 1 m in length or width.
This applies where access to attic or roof spaces is:
  • from the exterior,
  • from interior heated space, or
  • from unheated enclosed space (e.g. garage).
This applies 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 openings in environmental separators, which could lead to:
  • the ingress of precipitation,
  • the ingress of insects or vermin,
  • excessive heat transfer,
  • compromised thermal performance of components intended to provide resistance to 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 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:

OH2.5

 

APPLICATION:

Closures for access hatches to attic or roof spaces that measure:
  • not less than 3 m2 in area,
  • not less than 1 m in length or width, and
  • not less than 600 mm in height over an area that is not less than 3 m2 and not less than 1 m in length or width.
This applies where access to attic or roof spaces is:
  • from the exterior,
  • from interior heated space, or
  • from unheated enclosed space (e.g. garage).
This applies in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].

INTENT:

Where access is from the exterior or unheated enclosed space (e.g. a garage), to limit the probability of openings in environmental separators, which could lead to the ingress of insects or vermin, which could lead to negative effects on sanitation, which could lead to harm to persons.