10 tips to prevent mould and improve indoor air quality

Mould growth on internal walls is often the result of trapped moisture, poor insulation, or water leaks. Adequate ventilation and moisture control can help prevent mould growth in these areas.

Start by cleaning mouldy walls and window sills with mould removal products. Ensure surfaces dry completely and improve air circulation to prevent future problems.

Toxic black mould can lead to symptoms like runny nose, skin irritation, or more serious issues in those with compromised immune systems. Persistent condensation and damp conditions often make it worse.

Window condensation indicates excess indoor humidity. If not addressed, it can create a breeding ground for mould spores and result in mouldy walls or damaged window sills.

Yes. Combine moisture control techniques, use mould inhibiting paints, repair faulty guttering, and ensure double glazing is not compromising ventilation. Regular mould removal and maintaining relative humidity levels are key.

Absolutely. Poor insulation causes cold surfaces where condensation occurs, leading to mould growth. Insulating walls and windows can reduce these risks.

Improve ventilation and check for water leaks or moisture collecting in hidden areas. Using damp proof materials and keeping spaces energy efficient can also help trap less moisture.

Yes. While they retain heat better, energy efficient homes often need mechanical systems to maintain adequate air circulation and prevent mould in damp conditions.

Keeping relative humidity between 40–60% helps avoid mould growing on surfaces. Use a hygrometer to monitor levels and ventilate as needed.

To prevent mould from forming on cold surfaces, focus on insulating external walls and ensuring proper ventilation. These steps reduce the chances of condensation, which is one of the main causes of mould. Keep temperatures consistent throughout your home, especially in winter. For added protection, use anti-mould paint in vulnerable areas and avoid placing large furniture directly against cold walls, where airflow is limited. These strategies are among the most effective ways for how to prevent mould and protect your walls long term.

Black mould can produce allergens and irritants that may cause respiratory issues, eye irritation, and allergic reactions in sensitive individuals. Prolonged exposure may worsen health risks for those with asthma or weakened immune systems.

Use protective gloves and a mask, clean the area with mould-killing products, and ventilate the space well. Prevent regrowth by reducing humidity and improving airflow.

Bedroom mould is often caused by high humidity, poor ventilation, and cold walls. Use a dehumidifier, ensure daily airing, and avoid placing furniture tightly against external walls.

Yes, both dust mites and mould prefer warm, humid environments. Keeping humidity below 60% and ventilating regularly helps reduce the presence of both.

The best way is to control moisture and improve airflow. Keep humidity between 40–60%, maintain consistent heating, and ventilate every room regularly.

Cleaning products can kill surface mould, but long-term prevention comes from addressing the root cause: excess moisture and poor ventilation.

Heating helps prevent condensation, especially on walls and ceilings. Warmer surfaces are less likely to collect moisture, reducing mould risk.

Ventilation removes stale, moist air and replaces it with fresh air. This keeps humidity in check and helps prevent condensation and mould.