5.10.2.4.(3)

Intent

Intent 1:

To exempt certain glazed assemblies from the requirement for a thermal break stated in Sentence 5.10.2.4.(2), on the basis that:

  • the assemblies are installed as storm windows and doors, because in this application they act as a secondary protection against heat transfer, or
  • the assemblies are required to have a fire-protection rating and it is recognized that fire is a more serious hazard than inadequate thermal performance and that rated glazed assemblies with thermal breaks are unlikely to be available.

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