My son just bought a new house in Calvary, Alberta. The last few nights have been approximately -30 °C (-22 °F).
When he was cleaning his second floor guest bathroom, he noticed a stain on the ceiling of the main floor directly under that bathroom. He called the builder right away and their plumber looked and said the stain is caused by condensation on a pipe in the unfinished attic space thawing and dripping down the pipes. My son lives alone and works full time so he is not there running the water and steaming up the house a lot.
- Would there have been any reason to run a pipe through an unheated attic in a new build in cold weather?
- Should they be looking for bigger problems like incorrect insulation or leak in envelope?