Frozen pipes

After yesterday's shift, I came home to a plumber in the house for the second time this week to defrost some pipes - Toronto's cold snap is not agreeing with our house. This plumber thinks that the front wall of the basement where the city's water pipe is coming in is not insulated well enough. That much is obvious when you stick your hand in the hole in the wall where the access is and feel around - it's cold. The city's water comes in, then goes up that wall and along the ceiling after. The plumber feels that the water's freezing along that section of pipe that's going up the wall. For the time being we're going to leave water running to make sure there's no freezing over again and look at more permanent solutions next week. More likely than not we're going to have to tear down a big section of wall and really insulate the stuffing out of it.