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Leaks Around The House

Clapham properties—spanning terraces near the Common, converted flats, and modern builds—often have places where leaks hide. Many older houses have sash or bay windows with external sealing that has deteriorated; heavy rain can cause leaks that run down into window frames, behind plaster, or down internal walls. Loft conversions in Clapham are popular, but roof intersections, valleys, and dormer connections are frequent weak points where leaks can let in moisture, especially after wet, windy weather.

Inside, kitchens in flats often hide leaks under sinks, behind appliances, or where pipework is boxed in. Shower trays and bath enclosures along external walls near Clapham High Street can seep water if grout or sealant deteriorates. Leaks behind vanity cabinets or beneath wash basins often show as damp or mould in the skirting boards, especially in properties where ventilation is limited.

External plumbing is another concern in Clapham. Pipes mounted on garden walls or façades can suffer from weather exposure—wind-driven rain, frost, and heat cycles cause seals and joints to loosen. Downpipes or external boiler flue penetration points are especially susceptible. Older exposed copper or iron pipes often show pinhole leaks because of corrosion, especially at joints or where pipes have been altered. Our local Plumbing Clapham team can replace or reinforce these vulnerable connections to restore reliability and prevent water damage.

In flats, hidden leaks are particularly common: behind service risers, within ceilings, or under floorboards. Tenanted properties may have minor leaks that go unreported until they cause staining or odours. We use advanced leak detection tools—acoustic sensors, moisture readers, and thermal imaging—to trace leaks before visible damage happens, preserving décor and structure.

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Common Plumbing Leaks

In Clapham households, several types of plumbing leaks crop up time and again. One of the most frequent are faulty seals and washers, especially in taps, mixers, and shower fittings. A dripping mixer valve might seem trivial but left too long can corrode surrounding fittings.

Pipes joints, especially older ones or those installed many decades ago, suffer from wear and corrosion. In Clapham’s Victorian homes, aged copper or iron joints often degrade and lead to slow leaks. Similarly, O-rings and gaskets inside fixtures degrade over time and need replacement.

A leaking toilet is another commonplace issue. Running cisterns, worn flapper valves, or internal leaks inside the pan are frequently reported. Even a seal or washer failure in the toilet’s internal mechanism can cause water wastage and slight flooding beneath or around the loo.

High or fluctuating water pressure can worsen leaks. When pressure spikes—say when multiple appliances are in use—weak pipes, joints, or washers take the strain. In properties with multiple storeys, showers on upper levels often respond poorly to pressure changes, exacerbating any small leaks.

External taps, hose connections, and garden plumbing are also frequent trouble spots. With Clapham’s many rear gardens, hoses left connected in winter, frost action, or decay of external fixtures causes leaks that may travel inward or damage walls.

Finally, sealant and grout failures around baths, showers, and tiles are a constant issue. Moisture seeping through deteriorated grout or broken tile edges causes leaks behind panels, within flooring, or beneath shower trays.

WPJ Heating’s team in Clapham specialises in diagnosing, locating, and repairing these common leaks fast—whether they’re dripping taps, hidden behind walls, or causing damp patches. We replace and renew seals, fix or re-joint pipes, address pressure problems, and ensure regular maintenance, helping households avoid damage and unnecessary water waste.

For more information give us a call on 020 7350 2511 or book an appointment. You can also leave your number and we’ll give you a call.

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