We're in Minnesota and have had a very cold December. This is our first winter in this house. The house was a foreclosure property and we rehab'd it for our residence.
My plumbing waste stack has frozen closed. It did the same thing a couple weeks ago and we had a plumber go up and remove the ice block and snake the vent pipe - he said there were no obstructions in the pipe. Prior to his visit I did insulate the 12-16" of pipe that was showing in the attic space. The vent pipe runs up the west wall of the house, which at that part is about 2.5 stories tall.
Since I don't want to hire a plumber every 2 weeks to remove the ice cap on the stack and don't want to go up 2.5 stories on a ladder, does anyone have any suggestions on how to prevent this?
I've read heat tape can be used but it's a fire hazard, plus I'd then have extension cords running on the outside of the house (which I really don't want). Other suggestions on the web include insulating the pipe in the attic, which I've already done.
Hoping for some great ideas. Thanks.