7 Signs You Have a Hidden Water Leak

Hidden leaks are sneaky. By the time you see visible damage, water has usually been running for weeks or months. Here are the earliest warning signs we teach every Katy homeowner to watch for.

The seven warning signs

1. A water bill that jumps without explanation.
2. A musty smell that never fully goes away.
3. Warm spots on the floor (a sign of a hot water slab leak).
4. Water meter moves when all fixtures are off.
5. Bubbling or peeling paint on walls or ceilings.
6. Loose or shifting floor tiles.
7. Unexplained mold or mildew, especially in corners.

What to do if you spot the signs

Don't wait. A professional water damage inspection uses thermal imaging and moisture meters to pinpoint the source without unnecessary demolition. Catching a leak in week 1 instead of month 3 typically saves $8,000–$15,000 in repairs.

DIY leak detection test

1. Turn off every faucet, appliance, and toilet in the house.
2. Locate your water meter (usually near the curb).
3. Note the reading and don't use water for 2 hours.
4. Recheck the reading. Any movement means an active leak.