POOR INSTALLATION WITH BASEMENT WATERPROOFING MIGHT BE THE PROBLEM! If the sump pump is overflowing, or not working properly, it could be that it was not installed correctly. We see that a lot, where a homeowner installed a sump pump incorrectly, or a company was brought in and did shoddy work. Sump pump installation and repair is best left in the hands of waterproofing professionals, to start. Canada Waterproofers is your go-to source for basement waterproofing, including sump pump installation, or sump pump replacement, in Toronto. Installation is a major excavation job. The sump pump specialists will jackhammer the concrete floor, dig the pit, connect the weeping to the pit, install the liner and pump, then make sure the device is operating properly.