Quick answer
A hidden leak may show as unexplained damp, staining, peeling paint, a musty smell, warm floor patches or a water meter that moves when no water is being used. These signs are clues rather than proof, so investigate safely before opening walls or floors.
Look for changes inside the home
Water can travel away from the failed pipe before it becomes visible. Check ceilings, corners, skirting boards and the backs of cupboards for fresh marks, bubbling paint, lifted flooring or persistent damp. A musty odour can indicate moisture concealed behind a finish, but condensation and external water ingress can look similar.
Note whether the affected area grows after using a particular tap, appliance or heating system. Do not touch wet electrical fittings or use a light switch in a wet area. If water is near electrics, keep clear and turn off the relevant circuit at the consumer unit only if you can do so safely.
Check water use and the meter
- 1Turn off taps and appliances that use water, and make sure toilets are not refilling.
- 2Read the meter, wait without using water, then read it again. A changing reading can suggest a leak, but some meters update slowly and shared supplies can affect results.
- 3If the meter moves, close the internal stopcock if safe and repeat the check. This can help distinguish pipework inside the home from a possible supply-pipe issue.
Keep a useful record
Photograph marks with a date and note when they appear, weather conditions and recent water use. Check accessible pipework under sinks and around appliances without dismantling fittings. Do not drill, cut into walls or lift floors to search: pipes and cables may be concealed, and unnecessary access can increase damage.
TraceFix engineers in Birmingham and London can use suitable methods such as moisture readings, acoustic listening or thermal imaging to narrow down a suspected leak. The right method depends on the pipework and building; no single test identifies every fault.
When to call a plumber
- A damp patch is spreading or returning after drying.
- The meter moves when all water use is stopped.
- You cannot identify the source and damage is continuing.
- Water is near electrical equipment or ceilings are bulging.
Common questions
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