Warning This information has been archived because it is outdated and no longer relevant.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

9.26.4.3.(6)
ApplicationIntent
OH1OS2
ObjectiveOS2 Structural Safety
Attribution
[F20,F61,F80-OS2.3]
Application
Application 1: 
Open valleys flashed with two layers of roll roofing, on roofs of buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
Top of Page
Intent
Intent 1: 
To limit the probability that valley flashing, in combination with the bottom layer required by Sentence 9.26.4.3.(5), will be unable to resist structural and environmental loads (such as those imposed by foot traffic, UV exposure, snow accumulation, ice damming, rain and freeze-thaw cycling), which could lead to the displacement of roofing.
This is to limit the probability of:
  • falling roofing materials, or
  • precipitation or meltwater ingress, which could lead to deterioration, which could lead to the structural failure of roofs or assemblies protected by roofs.
This is to limit the probability of harm to persons.
Top of Page