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

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17. The upper part of a mansard style roof must be vented in accordance with the requirements of sections 14 to 16; however, at least 50% of the area of the required vent openings must be provided near the junction of the lower and upper portions.
O.C. 89-83, s. 17; O.C. 1721-85, s. 3.