Need to insulate pipes in unheated basement located in Northeast US. I have approximately two runs of copper piping in one corner of the basement, each approx 70 ft in length. I was planning on installing 2 lenghts of "Easy Heat Freeze Free" heating cable with thermostates on the pipe and foam insulation to cover. In addition,there is approx. 20 ft of exposed PVC sewage pipes. Is this the proper course to take to avoid freezing, and do I also have to be concerned with the PVC sewage Pipes?