Water damage guides

Written for the night of the leak and the week after. Each guide gives the short answer first, then the detail, and lists its sources.

• Frozen pipe burst: what to do in the first hourShut off the water, thaw safely, document for insurance, and prevent the next freeze.
• Water leaking from the ceiling: what to do and who to callFirst-hour steps, finding the source, who to call, and when drywall must come out.
• Water damage categories: clean, gray, and black waterCategory 1, 2, and 3 water, how one becomes the next, and what gets thrown out.