Water Dripping From the Ceiling: What to Do in the First Ten Minutes

Water coming through a ceiling has already been travelling for a while. Whatever you can see is the end of the path, not the start of it. The first ten minutes matter more than the diagnosis.

Do this, in this order

1. Shut the main water valve. It is usually where the supply enters the house — garage, utility room, crawl space, or at the meter box out front. Turn clockwise until it stops.
2. Kill power to the affected area at the breaker. Water and ceiling light fittings are a bad combination. Do not touch a switch in a wet room.
3. Put a bucket under it and poke a small hole in the bulge. A drywall bulge holding water will eventually let go all at once. Draining it deliberately does far less damage.
4. Move furniture and lift rugs. Water spreads sideways under flooring.
5. Call for help.

Where it is probably coming from

A bathroom directly above. The usual suspects are a failed shower pan, a leaking shower valve behind the wall, a toilet wax ring that has given up, or a supply line to a sink or toilet.

A supply pipe in the ceiling void. Continuous dripping that does not depend on anyone using water points here — a split or failed joint running under pressure.

A drain line. If it only drips when a fixture upstairs is used, it is on the waste side rather than the supply side.

The roof. Worth ruling out: does it correlate with rain rather than with water use?

How we find it without opening the whole ceiling

Water tracks along joists and can emerge feet away from the actual failure. Cutting where the drip is often means cutting in the wrong place. We isolate sections, watch the meter, and use acoustic and moisture equipment to narrow it down before opening anything. See leak detection for how that works.

If your ceiling is dripping right now, stop reading and call (833) 435-9778. Someone answers at any hour, and they will talk you through the shutoff while a van is on the way.