The pipes to our washing machine freeze, and a contractor's solution was to install a vent to allow warm air from the laundry room to keep the pipe warm. That made things better, but the pipes still freeze occasionally. I believe another vent needs to be put in the wall past the stud that is blocking warm air from accessing all of the above ground pipes. The contractor is hesitant to do that because it will affect the "look" of our laundry room. I don't care, it's a laundry room after all, but is there another solution? Our house is on a slab, no basement.