Damp, Condensation & Moisture Problems Properly Diagnosed
Don’t guess. Identify the cause before treating the symptoms.
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Black Mould Around Windows
Black mould around windows is a common issue in many London properties, particularly during colder months. It is usually caused by condensation forming on cold surfaces, creating the ideal conditions for mould growth.
Why Mould Forms Around Windows
Mould commonly forms around windows because these areas are colder than surrounding surfaces. When warm, moist air meets the cold glass or frame, condensation develops, providing moisture for mould to grow.
Common Causes of Mould Around Windows
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Condensation forming on cold glass surfaces
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Poor ventilation in rooms
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High indoor humidity levels
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Limited airflow around window areas
Is This a Damp Problem or Condensation
In most cases, mould around windows is caused by condensation rather than structural damp. However, ongoing moisture can still lead to damage if not properly managed.
Cleaning mould alone will not prevent it from returning if condensation continues to form. Addressing ventilation and moisture levels is essential to reduce recurring mould growth.
If you’re unsure whether damp proofing is required, you can read our guide on do I need damp proofing.
You can learn more about related issues:
Condensation & Damp Inspections London
A professional inspection can determine whether mould is caused by condensation or a more serious damp issue, ensuring the correct approach is taken.
For a full assessment, visit our damp inspection London page.