How to Tell If You Have a Hidden Water Leak at Home

A water leak that goes unnoticed can silently damage your home, drive up your water bill, and lead to mould and structural issues. The worst part? You might not even see it coming.

At Plumb Guarantee, we help homeowners across the Western Cape detect and repair hidden leaks before they turn into disasters. Here are the top signs you could have a hidden water leak — and what to do about it.

1. Unexpectedly High Water Bills

If your water bill suddenly spikes without an obvious reason (like filling a pool or watering the garden more), there may be a leak somewhere in your plumbing system.

2. Damp or Discoloured Walls and Ceilings

Brown stains, peeling paint, or bubbles in the paintwork can all be signs of a slow leak behind walls or in the ceiling.

3. Mould or Musty Smells

Even a small leak can create the perfect conditions for mould growth. If your home starts to smell damp or musty, especially in enclosed spaces, it’s time to investigate.

4. Low Water Pressure

A drop in water pressure might mean that water is escaping somewhere in the system before it reaches your taps or showerheads.

5. Sounds of Dripping or Running Water

Hearing water when no taps are on? That’s often one of the clearest signs of a hidden leak.

6. Cracks in Walls or Floors

Over time, water can weaken the structure of your home. If you notice new cracks or sagging in walls or floors, it’s worth checking for a leak underneath.

What to Do If You Suspect a Leak

Don’t wait for the damage to get worse. Our leak detection specialists at Plumb Guarantee use non-invasive technology to find the exact source of the leak — without tearing up your floors or walls.

Book a Professional Leak Detection Today

If you’re seeing any of these warning signs, contact Plumb Guarantee for fast, accurate leak detection and repair services. We’re here to protect your home — and your wallet.