You may have a hidden water leak behind walls or floors in your Calpe home if you notice damp patches, peeling paint, swollen flooring, loose tiles, mould, musty smells, unexplained stains, reduced water pressure or a higher-than-usual water bill.
Hidden leaks can develop slowly behind bathrooms, kitchens, utility rooms, ceilings, terraces or pipework areas. Even if the leak is not visible, the damage can spread through walls, floors and ceilings if it is not checked and repaired early.
For professional help with pipework, water leaks and plumbing repairs, contact 100% Plumbing through our general plumbing services in Calpe and the Costa Blanca Seite.
Common signs of a hidden water leak
Hidden water leaks are not always obvious at first. In many Calpe and Costa Blanca properties, the first sign may be a small damp patch, a musty smell or a change in water pressure.
You may have a hidden leak if you notice:
- Damp patches on walls, ceilings or floors.
- Peeling paint, bubbling plaster or damaged wallpaper.
- Swollen wooden flooring, skirting boards or door frames.
- Loose tiles, cracked grout or damaged silicone seals.
- Mould growth or dark stains.
- A musty smell that does not go away.
- The sound of running or dripping water when taps are off.
- Reduced water pressure.
- A boiler or water heater losing pressure repeatedly.
- An unexplained increase in your water bill.
- Wet areas outside the property with no clear cause.
If one or more of these signs appears, it is best to arrange a professional inspection before opening walls, floors or ceilings yourself.
Why hidden leaks should not be ignored
A hidden leak may look minor on the surface, but water can travel behind tiles, under flooring or through ceiling voids. Over time, this can damage plaster, cabinets, flooring, insulation, paintwork and electrical areas.
In homes across Calpe, hidden leaks may also be linked to older pipework, pressure changes, hot water systems or limescale build-up. If the cause is not repaired properly, the same issue can return and lead to higher repair costs.
If the problem appears to be connected to hot water, a leaking cylinder, a boiler or repeated pressure loss, you can also read more about our hot water systems and repairs.
What should you do if you suspect a hidden leak?
If you suspect a hidden leak, avoid breaking tiles, cutting into walls or lifting flooring without professional advice. A plumber can help identify the likely source and recommend the safest repair.
You should:
- Turn off the water supply if water damage is active or spreading.
- Avoid using sockets or appliances near damp areas.
- Check whether the water meter moves when all taps are off.
- Take photos of stains, damp patches or visible damage.
- Move furniture and valuables away from affected walls or floors.
- Avoid painting over damp areas before the cause is fixed.
- Contact a professional plumber for inspection and repair advice.
If the leak is spreading quickly, dripping through a ceiling, close to electrical areas or causing flooding, treat it as urgent. In that case, call 100% Plumbing’s 24h emergency help line on 607 415 520 or visit our emergency plumbing page.
Could the leak be outside your property?
Sometimes a leak may appear to come from inside the property, but the cause may be outside, near the mains supply, garden pipework, terraces or pool equipment areas.
If the issue appears to be outside your property boundary or related to the public mains water network, you may also need to contact Aguas de Calpe, which lists a 24-hour breakdown service for water supply faults in Calp.
For internal pipework, plumbing repairs and leak-related problems, 100% Plumbing can help through our allgemeine Klempnerarbeiten.
Hidden water leak help in Calpe and the Costa Blanca
100% Plumbing helps homeowners, landlords, holiday rental owners and businesses in Calpe and across the Costa Blanca with hidden water leaks, pipe repairs, pressure problems, hot water faults and related plumbing issues.
If you are unsure whether a damp patch, musty smell or pressure problem is caused by a hidden leak, it is better to ask for advice early. Finding the source quickly can help prevent further damage to walls, floors and ceilings.
Suspect a hidden water leak in Calpe? Contact 100% Plumbing for professional plumbing inspection and repair through our general plumbing services in Calpe and the Costa Blanca. For urgent leaks, call 607 415 520.
