Can I run supply lines in the attic?
The supply lines to our master bath (built 1990) currently run in the exterior walls. We live in Maine, and these lines freeze. We were informed by a neighbor when it got really cold the first winter that we needed to run the faucets at night!
The addition where these are located is on an inaccessible crawl space for some of the run, although the bathroom itself is currently gutted.
Is it an option to run the supply lines up (from the full basement on the older part of the house) through an interior wall and into the attic? We'd bury them under the insulation.
Would the heat in summer be a problem? Are there other problems you can see with this arrangement?