Div. B › Part 9 › 9.7 › 9.7.3 — Performance of Windows, Doors and Skylights

9.7.3.3 — Thermal Characteristics of Windows, Doors and Skylights

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(1) Except as permitted in Sentence (2), metal frames and sash of windows, doors and skylights shall incorporate a thermal break.
(2) Windows and doors described in Sentence (1) do not require a thermal break where they are installed as,
(a) vehicular access doors,
(b) storm windows and doors, or
(c) windows and doors that are required to have a fire-resistance rating.
(3) Windows, doors and skylights, with or without storm doors or sash, that are installed in buildings where the intended use of the interior space will not result in high moisture generation shall have a maximum thermal transmittance (U-value) or minimum temperature index (I) in accordance with Table 9.7.3.3.
(4) Windows, doors and skylights, with or without storm doors or sash, that are installed in portions of buildings where the intended use of the interior space will result in high moisture generation shall be designed in conformance with Subsection 5.3.
Tables & Figures referenced
Table 9.7.3.3 : Maximum U-value or Minimum Temperature Index (I) for Windows, Doors and Skylights (1) (2) (3) : Forming Part of Sentence 9.7.3.3.(3)
Loading Table 9.7.3.3…
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