Kitchen Floor Wet Near the Sink With No Obvious Leak

Four things that wet a kitchen floor

Before looking for a leak, rule out the ordinary causes. Each leaves a different pattern, and the log in the next section is built to tell them apart.

• Splash and drips from washing up, wet cloths and a dripping dish rack, which stop when you stop
• Condensation on a cold pipe or a cold floor tile, which forms in cold weather or after cooking and dries by midday
• A slow drip from the tap, the waste or an appliance connection, which wets after use and dries slowly
• A hidden pipe or heating leak, which keeps the area wet when nothing is being used

The 48-hour log

Dry the floor properly with a towel and mark the edge of the damp area with a strip of masking tape or a pencil line. Then record what you see at fixed times for two days. A phone note works; the table shows the columns to keep.

On day one, use the kitchen as normal and write down each use of the sink and appliances. On day two, from the evening, use no water in the kitchen at all, including the dishwasher and washing machine, and keep checking the edge. The overnight rows are the most useful ones.

How to read the log

If the floor is dry on every overnight check and wets only after use, the cause is splash or a slow drip at a fitting that leaks while it is wet. If it is wet only at the cold hours and dry by lunch, suspect condensation, and check whether the wet is on a cold-water pipe or against an outside wall. See a cold pipe sweating or leaking.

If the floor is wet at every overnight check, with no use, there is a live source. Cold supply, hot supply, heating pipe and a waste that is full of standing water are all possible. If the wet edge also grows, the leak is not slow.

Checks that need no tools

Read your water meter, if you have one, last thing at night and first thing in the morning with every tap closed. A reading that moves means water is leaving the supply. A meter that stays still on the supply side points to waste, condensation or a heating circuit.

Look at the central heating pressure gauge on the boiler. If it keeps dropping and you have to top it up, a heating pipe is a candidate for a wet floor even when the cold taps are off. Heating leaks are a separate problem from drinking-water leaks and are surveyed at a different rate.

When the log says it is a pipe

A wet floor with no use points to a pipe in the floor or behind the units. At that point you can stop guessing and take readings. A moisture meter across the floor edge shows where the wettest area is, and a pressure test shows which branch is losing water; pin versus pinless moisture meters shows what each type of meter reads through a floor covering.

Bring the log; the times of the wet checks save time on the day. Read the kitchen leak survey page to see how the visit runs. A kitchen that was fitted recently has its own checks, set out in leak after a kitchen is fitted.

The fixed-price package is £580 to locate a leak in one property, with whichever methods it needs. No VAT is charged. No find, no fee applies when a live leak inside your own property cannot be located. A small repair, such as tightening a fitting or replacing a small part on the pipe, can be done on the same visit once the leak is found, agreed first. A larger repair is quoted before any work starts, and the leak is stopped in the meantime; see repair after detection. Damage to cupboards and finishes is quoted separately through a partner team, as set out in leak damage repair. Whether a policy covers that damage depends on its wording; an escape of water insurance claim, step by step lists what to keep.

Why the wet patch is rarely where the leak is

Kitchen floors are built in layers: a floor covering, often an underlay or a board, then screed or timber below. Water that gets in at the sink does not stay put. It runs to the lowest point or the nearest joint, travels under the covering and then rises at an edge, a seam or the door threshold.

On a timber floor, water follows the joists and can surface a metre or more away, or drip through the ceiling of the room below. On a concrete floor it spreads sideways under the covering and lifts the edge. A tiled floor may show water first at the grout line furthest from the leak, because that is where the water has found the weakest seal.

This is why the log asks where the wet edge moves, not just whether it is wet. An edge that creeps outward along one side is following something. An edge that stays put and dries is a surface problem. A floor that stays wet with no stain anywhere is covered in leak without visible stains.