Water travels. It runs along the top of a ceiling joist, across a rafter bay, down the face of a duct - and shows up as a drip, a stain, or a bulge in the ceiling somewhere that isn't directly below the source. Homeowners who cut drywall open at the visible stain almost always find nothing. The real leak is three feet away, ten feet away, or in a different room entirely.
This book walks the diagnostic method that finds the actual source:
probability.
contain damage, kill electrical if needed.
apart before you open the ceiling.
The four possible categories of ceiling leak, ranked byThe first twenty minutes - protect the rest of the house, The inspection pass through the room above the stain.Tracing the path water took to reach the drip.Plumbing vs. roof vs. HVAC vs. "other" - how to tell themWhen to open drywall, where, and how much.Fix-or-hire decisions for each category.Drying, repair, and verification.Written for the homeowner who'd rather spend an hour diagnosing than spend the afternoon patching a hole that didn't solve the problem.