I want to remodel a small bathroom to add a double-sink vanity. Currently the layout looks roughly like this, with a single-sink vanity:
I've looked at keeping everything on the "west" wall, but there's no great way to expand the vanity due to the space required around the toilet. The best configuration I could think of is this:
I found some larger vanities online and verified that they would fit the space with enough room for the door, trim, and so on. However, the following facts make me nervous:
- The "south" wall is an exterior wall, and the sink plumbing would have to run through that.
- I can't remember ever seeing a bathroom laid out like this.
Is there a reason I shouldn't lay out my bathroom like this?
Best Answer
Water supply pipes on an exterior wall have a greater chance of freezing.
We do this all the time where I live, but we make sure the building insulation is on the exterior side of the water supply lines. Make sure the bottom and top of the insulation batts are turned so as to keep cold air from seeping into the cavity.
You’re not moving the lav that far, so venting, pressure drop, etc. is not an issue.