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Room guide

Damp in the kitchen damp & condensation

Cooking, boiling and dishwashing add moisture rapidly, while sinks, appliances and concealed plumbing create separate leak risks.

See the useful cluesDiagnose this problem
What are you seeing?

Clues that matter in this room

These patterns are useful starting points, not diagnoses on their own.

01Window and wall condensation during cookingCompare this with timing, weather and how the room is used.
02Mould in cold corners or behind unitsCompare this with timing, weather and how the room is used.
03Local swelling, staining or wetness near servicesCompare this with timing, weather and how the room is used.
Before you buy or book work

Three checks worth making

1
Use extraction while cooking and check dischargeUse the result to separate condensation, leaks and building defects.
2
Inspect beneath sink and appliancesUse the result to separate condensation, leaks and building defects.
3
Compare damp patterns with cooking and rainfallUse the result to separate condensation, leaks and building defects.
Watch for this

Do not assume every damp kitchen wall is condensation if the pattern is localised or linked to plumbing.

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Understanding damp in the kitchen damp & condensation

Room context

Cooking can add substantial water vapour while sinks, appliances and pipework add possible leak sources.

What to check first

Check cooker extraction, nearby plumbing/appliances, condensation on glazing and whether a local patch changes with water use rather than weather.

Use timing as evidence

Compare the symptom with rain, showers, cooking, laundry, overnight occupancy and heating. The room tells you where to investigate; it does not prove the cause.

Evidence & reviewDampDeck reviewed this guidance on 3 September 2026. UK government guidance says damp and mould should be addressed by identifying and correcting the underlying moisture cause; surface mould removal alone does not prevent recurrence.UK Government source →
Room investigation

A sensible check sequence

Start with what changes in this room before jumping to a whole-house diagnosis.

1

Check cooker extraction, nearby plumbing/appliances, condensation on glazing and whether a local patch changes with water use rather than weather

Common routes

Compare the moisture sources that can affect this room

CondensationCause guideCondensationHumidity meeting cold surfaces.Explore →Rain penetrationCause guideRain penetrationExternal water finding a path through the envelope.Explore →LeaksCause guideLeaksEscaping water from pipes, wastes, seals or appliances.Explore →
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Useful products for this stage

Only products that support the investigation or an appropriate fix are shown here. An active leak or building defect still needs repairing.

Digital hygrometerRelevant productDigital hygrometerBrowse on Amazon →Home dehumidifierRelevant productHome dehumidifierBrowse on Amazon →Extractor & ventilation productsRelevant productExtractor & ventilation productsBrowse on Amazon →
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Useful products for checking and controlling moisture

Products here are contextual aids. They are not presented as cures for active leaks, rain penetration or building defects.

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Relevant to Kitchen damp & condensation

Useful diagnostic tools

DampDeck only surfaces products that make sense for this stage of the investigation. Products do not replace diagnosis or repair of an active leak.

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Professional investigation

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