Home About Us Locations - Quebec St Constant Locations St Constant Locations Lafarge Canada Inc. (Cement) 1 Chemin Lafarge, St Constant, QC J5A 2G4 Ph: +1 (450) 632 7750 Lafarge Canada Inc. (Aggregates) 436 Chemin de la Petite Cote, St Constant, QC J0X 1X0 Ph: +1 (450) 638 0311