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

Section 12
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12. Lightweight plastic-type insulation installed on a masonry or concrete wall may be without a vapor barrier if:
(1)  its permeance rating is not more than 250 ng/(Pa•s•m2); and
(2)  the vapor barrier function is permanently ensured at all joints and on the perimeter.
O.C. 89-83, s. 12; O.C. 1721-85, s. 3.
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