The bathroom I have planned for our theater has the water lines placed in the knee wall of our bonus room (pics attached). The feed for the water run has one side of the wall in heated space and the other side of the wall facing our garage. I am planning on wraping temp activated heat tape on the lines in the dead space of the knee wall. I am also paning on building an insulated box around them with a vent to the finished bathroom. Is this enough to protect against freezing lines? We libe in Northern Ohio and temps dip to 0 degrees F during some winter nights. Any feedback is appreciated.

pipe insulation and heat tape,and insulation in the wall will definitely work.


gary the plumber

I'd skip the venting to the finished space, and just rely on the tape and insulation.

Bathrooms aren't a place where you want to be subjecting people to air exchange with an unconditioned (even if insulated) space, as a draft on your wife/girlfriend's backside won't endear her to you. ;)