Signs of Water Damage: What It Looks Like (With Photos)

Brown rings or spreading stains can mean water is leaking above the ceiling. Even a dry stain needs its source checked.

A swollen, sagging ceiling can hold a heavy pocket of water. Keep away from underneath it, do not puncture it, and call now.

A ceiling stain near the air handler or vent may come from an overflowing condensate drain. Have the AC checked and the wet ceiling inspected.

Brown stains or sagging ceiling tiles can indicate a roof or plumbing leak overhead. Keep staff out from beneath loose or swollen tiles.

Paint bubbles or peels when moisture collects behind it. The wall may be wet inside even if the surface feels dry.

Baseboards swell, split or pull away from the wall when they absorb water. The bottom of the wall may need drying too.

A dark, wet band along the bottom of a wall shows water spreading through drywall. Removing the puddle alone will not dry the wall.

A wick line forms as drywall draws water upward. Moisture can extend above the visible line and needs to be measured.

Trim that stays damp after cleanup suggests hidden moisture is not drying. Check behind baseboards and inside walls before repainting.

A moisture meter can find water that is not visible on the surface. A professional compares readings with a dry reference area.

Floorboards curl at the edges or laminate rises after absorbing water. Moisture may still be trapped underneath.

Water covering tile can travel under cabinets and into adjacent rooms. Stay away from wet outlets and call for removal.

Carpet that squishes or releases water underfoot is soaked through. The pad beneath it can hold much more water than you see.

Curling floor edges after a repaired leak can mean moisture remains below. Stopping the leak does not automatically dry the floor.

Dark wet patches across carpet tiles may extend beneath desks and partitions. Moisture can remain in the backing and subfloor.

A puddle in an aisle after rain may point to a roof leak above. Keep people and stock clear of wet areas and electrical hazards.

A thermal camera may show unusual warmth where a hot-water pipe leaks under the slab. Heat alone is not proof; a licensed plumber confirms the source.

Tiles that crack, loosen or lift can be a sign of moisture or foundation movement. Have the floor and plumbing checked rather than assuming the cause.

A damp patch away from fixtures may come from water moving under the floor. Hidden plumbing and other possible sources need inspection.

Pooling water at cabinet bases can hide a supply-line or appliance leak. It can soak cabinet bottoms and nearby walls.

Water around a heater can spread across concrete and into adjoining walls. Avoid wet electrical equipment and have the source stopped safely.

Spraying water inside a sink cabinet points to an active plumbing leak. Shut off the supply if safe and call; a licensed plumber repairs the pipe.

A moving leak indicator when taps and water-using appliances are off can signal a plumbing leak. It does not tell you where; a plumber can locate it.

Pooling water around kitchen equipment creates a slip risk and can reach walls. Restrict the wet area and have the source checked.

A horizontal dirty mark shows how high flood water reached. Water may have soaked insulation and drywall behind the visible line.

Fine mud left after a flood means outside water entered the property. Avoid contact because flood water can carry contaminants.

Water flowing through a threshold can spread quickly across the floor. Stay out of moving water and call once you are safe.

Damp furniture bases and swollen lower cabinets show that flood water reached porous materials. They need assessment before reuse.

Dark water rising from a shower or floor drain may be a sewage backup. Stop using water and keep children and pets away.

Water spreading around a toilet can be contaminated even without visible waste. Avoid contact and have the drain and affected floor checked.

Discolored flooring after a backup can leave contamination even when the water is gone. Professional cleaning and drying may be needed.