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

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72. In order to ensure air tightness in heated spaces of a building, caulking shall be done in the following locations:
(1)  junction between the sill plate and the foundation;
(2)  openings for utility service entrances;
(3)  and any other location where there is a possibility of air leakage.
O.C. 89-83, s. 72.