I'm currently renovating my basement in an 80+ year old house. The basement is fairly low (just over 6') but it's a good useable space that I want to finish nicely. I've recently had an interior weeping system installed due to water issues which has a plastic membrane going 4' up the foundation wall. As I'm framing the walls I've realized that the incoming water supply pipe runs along the bottom of the joist along the front wall of the house. Because of the interior weeping system I cannot frame right to the foundation wall. I need to leave approx. a 2 1/2" gap between the framing and the wall. My question is I want to avoid a cold space around the water supply pipe, but since it runs directly beside the foundation wall and I am framing 2 1/2 " away from the wall, how can I insulate around it to ensure there is no freezing issues? I hope I've explained myself well enough...Thanks in advance for any advice!