Leak Detection Whitton: Where 1930s Semis Spring Leaks

Whitton is one of the most consistent bits of housing stock in the TW area. Almost the whole of TW2 between the High Street and the River Crane was laid out in the 1930s by a handful of estate builders, and the houses share the same bones: bay-fronted semis, a solid floor at the front, a suspended floor at the back, and a bathroom upstairs that has been refitted at least twice since.

That consistency is useful. When a Whitton house develops a leak, it is usually in one of four places, and we have found it in all of them many times.

The four usual Whitton leaks

1. The original supply pipe under the front path

Many Whitton semis still have their original supply pipe running from the street to the stopcock under the stairs or the kitchen sink. These pipes are now ninety years old. When one starts to weep you rarely see water; you see a damp patch on the hall floor, a stopcock area that is always slightly wet, or a water meter that never quite stops. Our guide to whether buildings insurance covers the supply pipe explains the cover question, because this pipe is your responsibility from the boundary inwards.

2. Heating pipes in the solid front floor

The front reception rooms sit on a concrete slab, and when central heating was added in the 1960s and 1970s the pipes were often chased into that floor. A pinhole in one of those runs shows up as a warm patch on the carpet, a boiler that needs topping up every week, or in bad cases a damp line creeping up the chimney breast. Lifting the floor to look is the wrong approach. Thermal imaging finds the trail from above in minutes.

3. The bathroom that has been refitted

Whitton bathrooms have usually been converted from the original layout, and each refit leaves joints behind the bath panel and under the floor. The classic sign is a stain on the hall or kitchen ceiling directly below, which appears after a bath or shower and dries out in between. Our shower leaking through the ceiling guide covers the quick checks before you call.

4. The side return extension

A lot of TW2 houses have a kitchen extension down the side, and the join between old wall and new floor is where pipes were rerouted. Leaks here are often mistaken for rising damp or a roof problem. Moisture mapping tells the difference.

How to tell a leak from condensation

Whitton’s 1930s walls are solid brick with no cavity, so condensation and cold-bridging damp are common, and they look like leaks. The distinctions:

• Condensation is worst in the morning, on the coldest wall, and improves with ventilation.
• A leak keeps a patch wet regardless of weather and often has a defined edge.
• A leak on a heating pipe moves with the heating: worse when it is on.
• The meter test settles it. Turn everything off and watch the meter for thirty minutes. If it moves, water is going somewhere.

How we find it

We bring acoustic listening gear for pressurised pipes, thermal imaging for heating runs, tracer gas for supply pipes and moisture meters for walls and floors. The goal is one mark and one small opening. On a Whitton front room floor that matters, because the alternative is taking up the whole slab to find a pinhole.

We also photograph and document the cause as we go. If the leak turns into an insurance claim, that record is what your insurer will ask for first.

If water is coming through now

1. Turn off the stopcock. In most Whitton semis it is under the kitchen sink or under the stairs.
2. If the boiler is involved, switch it off at the programmer.
3. Put a bucket under any active drip and move furniture out of the wet.
4. Call 07360 268948. We answer at any hour and Whitton is minutes from our Twickenham base.

A leak you can see is annoying. A leak you cannot see is the one that costs real money, and in a Whitton semi it has four favourite hiding places. We know all of them.