Do you have old pipes? My grandfather lives in the house that time forgot in Oregon, and during the Winter, he leaves his faucets at a constant drip to avoid the pipes freezing over. Maybe you doing the same would help? (I'm not keen as to how it prevents freezing.)
The water coming out of the main line into the home is approx 55f. As long as there is a minimal flow of water from the faucet dripping the really cold water in the pipe in the wall is being replaced with warmer water from below ground.



