Back9.18.5.1.(1)

ATTRIBUTION:

Functional Statement:

F60

To control the accumulation and pressure of water on and in the ground.

Objective:

OH1.1, OH1.2

 

APPLICATION:

Grading or drainage of heated and 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:
  • the ingress of rainwater,
  • the ingress of surface water, or
  • for heated crawl spaces, the ingress of water, which could lead to compromised thermal performance of components intended to provide resistance to heat transfer.
This is to limit the probability of:
  • 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, 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, and
  • the inadequate thermal comfort of persons.
This is to limit the probability of harm to persons.

ATTRIBUTION:

Functional Statement:

F60

To control the accumulation and pressure of water on and in the ground.

Objective:

OS2.3

 

APPLICATION:

Grading or drainage of 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:
  • the ingress of rainwater, or
  • the ingress of surface water.
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.