Detroit winters hit hard. Temperatures drop below freezing for days, then spike back up. Water inside pipes expands when it freezes, creating microfractures in copper and full cracks in old galvanized steel. When the thaw comes, those cracks weep. Slowly at first. The water stains you see in February might come from damage that started in December. Homes built before 1980 often lack proper insulation around pipes in exterior walls and attics. Those pipes freeze first. If you see brown spots on ceiling near an outside wall or above an unheated garage, freeze damage is the likely cause.
Detroit plumbers who do not understand local housing stock miss things. Many Detroit homes have galvanized steel supply lines that were installed in the 1940s and 1950s. These pipes corrode from the inside. The exterior looks fine, but the interior diameter narrows as rust builds up. Eventually, the pipe wall thins enough to leak. If you live in a brick colonial in Sherwood Forest or a bungalow in Rosedale Park, your home likely has galvanized pipe. Ironwood Plumbing Detroit has worked in these neighborhoods for years. We know what to look for. We know when to recommend a full repipe and when a section replacement is enough. You get advice based on the reality of Detroit housing, not generic plumbing sales pitches.