Warning This information has been archived because it is outdated and no longer relevant.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

9.26.7.4.(5)
ApplicationIntent
OH1OS2
ObjectiveOH1 Indoor Conditions
Attribution
[F20-OH1.1,OH1.2,OH1.3]
Application
Application 1: 
Location of nails or staples for 1-m-wide asphalt shingles, on roofs of buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
Application 2: 
This also applies to asphalt shingles installed as cladding, as stated in Sentence 9.27.1.1.(4).
Application 3: 
This also applies to the fastening of asphalt shingles on roofs with slopes of less than 1 in 3, as stated in Sentence 9.26.8.7.(1).
Top of Page
Intent
Intent 1: 
To limit the probability that fasteners will be located near areas of stress concentration at cutouts, which could lead to shingles being torn or displaced under wind-uplift loads and loads imposed by the shrinkage of shingles, which could lead to:
  • water penetrating directly to roof decking or sheathing, or
  • compromised thermal performance of components intended to provide resistance to heat transfer.
This is to limit the probability of:
  • an inadequate control of relative humidity, temperatures of interior spaces or water 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 roofs or walls or of assemblies protected by roofs or walls.
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.
Top of Page