I have a small laundry room addition off the side of my house. 3 walls of the room are outside walls, and the room is open underneath to the outside (2 pilasters for foundation, no crawlspace or basement). So needless to say, it is very exposed to wind. Also the room is not heated, but we keep the door to the house open to keep it heated. Anyway, we only have a cold water pipe leading from the house basement thru to the room, via exterior walls. The pipes have frozen. We put 4" of batt insulation (in 4" stud walls) between the outside and the pipe. What else can be done? If we put wrap-on pipe insulation, will that just keep the heat in the laundry room away from the water pipe? Please help.