E-1.1, r. 1 - Regulation respecting energy conservation in new buildings

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35. The thermal resistance required in section 34 for insulated roofs or ceilings separating heated space from unheated space or the outside air may be reduced near the eaves where required by the roof slope and the ventilation clearances. However, the thermal resistance directly above the inner surface of the outside wall shall be at least 2.1 m2 • °C/W.
O.C. 89-83, s. 35.