5.3.1.2.

(1) Materials and components installed to provide the required resistance to heat transfer or the means implemented to dissipate heat shall,

(a) provide sufficient resistance or dissipation,

(i) to minimize surface condensation on the warm side of the component or assembly,

(ii) in conjunction with other materials and components in the assembly, to minimize condensation within the component or assembly,

(iii) in conjunction with systems installed for space conditioning, to meet the interior design thermal conditions for the intended occupancy, and

(iv) to minimize ice damming on sloped roofs, and

(b) take into account the conditions on either side of the environmental separator.

(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,

(a) storm windows or doors, or

(b) windows or doors that are required to have a fire-protection rating.