Need advice on how to insulate copper piping (1/2" I think) that runs outside of the house. Who ever did that did not insulate and it is a miracle that my parents have yet to have a freeze burst the pipes. Of course, since it hasn't happened in 15 years, they don't believe me that it could happen, but I'm going to fix it as best I can anyways.
Anyways, the pipe is flush against the house. I was planning on some rubberized foam tubes, but because it is flush it is an impossible fit. My other option was cut some PVC down its length and then fitting that over over the copper and then spraying some Great Stuff in between the PVC and copper, using that as insulation and adhesive, but I can't imagine that going very smoothly with the foam expanding, plus I realize that the Great Stuff would make pipe repairs a little more complicated.
Hoping that are some plumbers or handy folk out here. Last thread I started I learned that no one that frequents BF Foo uses Scottrade.