Warning This information has been archived because it is outdated and no longer relevant.

Archived Content

Information identified as archived on the Web is for reference, research or recordkeeping purposes. It has not been altered or updated after the date of archiving. Web pages that are archived on the Web are not subject to the Government of Canada Web Standards. As per the Communications Policy of the Government of Canada, you can request alternate formats on the "Contact Us" page.

9.14.4.3.(1)
ApplicationIntent
OH1OS2OP2
ObjectiveOH1 Indoor Conditions
Attribution
[F60-OH1.1,OH1.2,OH1.3]
Application
Application 1: 
Grading of excavations for buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
Exceptions: 
except:
  • for the foundation walls of crawl spaces whose exterior walls have 25% or more of their total area above exterior ground level open to the outdoors [see Sentence 9.18.1.1.(1)],
  • for foundation walls that are subject to continuous hydrostatic pressure,
  • as stated in Sentence 9.14.2.1.(1), which applies to foundation walls that are drained by drain tiles or pipes, and
  • for foundation walls that are effectively drained by the native soil, or that have otherwise demonstrated that they do not require drainage.
Top of Page
Intent
Intent 1: 
To limit the probability of:
  • an inadequate flow of drainage, which could lead to water ponding under footings or floors-on-ground, or
  • an inadequate disposal of drain water.
This is to limit the probability of excessive moisture loading on foundation walls and basement floors, which could lead to:
  • the ingress of moisture from the ground, or
  • 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, relative humidity, or water ingress and 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 elements protected by the environmental separators.
This is to limit the probability of negative effects on the air quality of indoor spaces, which could lead to harm to persons.
Top of Page