The Ontario Building Code | Heat Transfer
188.8.131.52. Heat Transfer
(2) Except as provided in Sentence (3), all metal-framed glazed assemblies separating interior conditioned space from interior unconditioned space or exterior space shall incorporate a thermal break to minimize condensation.
(3) Metal-framed glazed assemblies need not comply with Sentence (2) where these assemblies are,
5.10.3. exterior Insulation Finish Systems