Finding the actual leak
Water rarely enters where it drips. It runs along rafters, trusses, and the underside of the decking before it finds a place to fall. We start at the stain, then trace uphill to the entry point rather than guessing and sealing the nearest thing that looks wrong.
Common sources here are pipe boots that have dried and split, step flashing at wall intersections, chimney counterflashing, skylight curbs, valley debris, and nail pops from an older install.
