7 Signs You Have a Concealed Water Leak in Your Chennai Flat

Concealed leaks are the most common plumbing call we get from flats in Perambur, Anna Nagar and Kilpauk — and the one most often mis-handled, because the first plumber breaks tiles to look for the problem. Here is how to recognise a concealed leak and what should happen next.

The seven signs

• A damp patch on a wall or ceiling that does not dry, usually below a bathroom or kitchen.
• Paint bubbling or flaking in one area.
• A musty smell in a room that has no obvious dampness.
• Tiles sounding hollow or lifting near the bathroom.
• The water meter moving when every tap is closed.
• A sudden rise in the water bill without extra use.
• Downstairs neighbour complaining of seepage.

What a plumber should do first

Isolate. Close the main and check the meter. Then test each line — hot, cold, and the drain — separately. A pressure test on the supply line tells you if the leak is in supply; a dye test in the drain tells you if it is the drain or the floor waterproofing.

Only after the line is identified should any tile be opened, and only over the section that is actually leaking. We have seen entire bathrooms demolished for a leak that turned out to be a failed shower-area waterproofing, not a pipe.

After the repair

If the leak was in the bathroom floor, the waterproofing must be redone before re-tiling, or the seepage returns within a year. We use a cementitious waterproofing coat with a proper flood test before tiling.

Send us a photo of the damp patch on WhatsApp at 76048 17790 and we will tell you what the likely cause is before we visit.