Seattle sees an average of 10 to 15 nights per winter where temperatures drop below freezing. Pipes in uninsulated crawl spaces, attics, and exterior walls are at risk. Homes in Capitol Hill, Queen Anne, and Wallingford built before 1980 often have copper or galvanized steel lines running through cold zones without foam insulation. When water freezes inside the pipe, it expands and cracks the wall. When the ice melts, pressure builds until the weakened section bursts. This is why most emergency pipe repair calls happen between 6 a.m. and 10 a.m. after a cold night.
Seattle's plumbing code requires all new water lines to be insulated in unconditioned spaces, but older homes were grandfathered in. Horizon Plumbing Seattle knows which neighborhoods have the highest risk for freeze damage and which pipe materials fail first. We have repaired burst water lines in every Seattle zip code, from Georgetown to Laurelhurst. When you call us, you get a crew that understands how your home was built, what code applies, and how to prevent the next failure.