How to prevent damp and condensation mould

Condensation mould is usually caused by moisture in the air settling on cold surfaces. The best way to prevent mould growth is to reduce moisture levels and deal with condensation early.

Moisture builds up quickly in kitchens and bathrooms, and condensation is more likely in colder, unheated spaces. These guides share simple steps to reduce humidity, improve airflow and lower the risk of mould in the areas most commonly affected.

Reducing moisture in key areas

Special Guidance – Bathrooms Bathrooms create high levels of steam in a short time. This guide sets out simple steps to remove moist air quickly, reduce condensation on surfaces, and prevent mould developing after showers and baths.

Special Guidance – Kitchens Cooking produces a lot of moisture that can spread around the home. This guide covers everyday actions—such as using extraction, covering pans, and ventilating briefly—to reduce condensation and mould risk.

Special Guidance – Unheated spaces Condensation can build up in colder, unheated areas such as porches and storage spaces. This guide explains how to improve airflow, reduce cold spots, and prevent moisture settling on cold surfaces so mould is less likely to develop.

Condensation mould in flats

Flats can get condensation because moist air has fewer places to escape. This can be worse in open-plan homes or rooms with little ventilation. Use extractor fans, open a window for a short time when you can, and wipe condensation from windows. If mould keeps coming back, report it.

Download the special guidance for Flats

Tackling condensation in problem areas

Condensation is most likely to form on colder surfaces and in areas with limited airflow. These guides explain how to keep windows and cold spots drier, reduce condensation build-up, and prevent mould developing or returning.

Special Guidance: Walls and Furniture

Special Guidance: Mould on Ceilings

Special Guidance: Windows Condensation

Heating and condensation

Warm rooms are less likely to get condensation. Cold surfaces attract moisture from the air, which can lead to mould. If you can, keep your home at a steady warmth rather than letting rooms get very cold. If your heating is not working, report it. If costs make heating hard, we can help with advice.

Download the special guidance for Heating

Drying clothes indoors

Drying clothes inside adds lots of moisture to the air. This can cause condensation on cold surfaces and lead to mould. Dry clothes outdoors if you can. If you need to dry indoors, use one room, keep the door closed, and open a window for a short time. Avoid drying clothes in bedrooms.

Read our special guidance for drying clothes indoors