Mould on walls is often a result of condensation when moist air comes into contact with a surface of a cooler temperature. As well as looking unsightly, mould can cause lasting damage to walls and compromise indoor air quality. Fortunately, there are ways to remove mould and keep it at bay without using harsh chemicals such as bleach. Find out how to remove mould from walls with our guide below.
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Mould develops on walls as a result of condensation. As moisture builds on a surface this provides the perfect breeding ground for mould to grow over time. This particularly happens on external walls as they tend to be the coldest surfaces in a property. It is also common to see mould growing on bathroom walls due to high humidity.
Top tip: Contact with mould spores can be harmful. Ensure that the room is well-ventilated before cleaning the mould.
White vinegar is a powerful way to kill mould without using bleach. Simply spray white vinegar onto the wall and leave to sit for at least thirty minutes. Wipe away with a damp cloth and open windows to allow the wall to fully dry. While the vinegar smell may initially seem strong, it will dissipate quickly after a few hours.
Borax is a white powder often used in cleaning products. It doesn't contain phosphates or chlorine. Its main ingredient is a naturally occurring mineral called sodium tetraborate.
Mix a cup of warm water with a cup of white vinegar and a few heaped teaspoons of borax. Spray the solution onto the wall and leave to soak for at least one hour. Wipe away with a damp cloth and leave to fully air dry. Always wear protective clothing when handling borax as it can irritate skin.
While baking soda is milder than vinegar and unlikely to work on aggressive forms of mould, it absorbs odours and residue that can prevent mould from regrowing. The gritty texture also works as a scrub to remove the mould. Mix a few heaped tablespoons of baking soda with warm water until a paste is formed. Apply the paste directly to the mould and leave to dry. Once dry, scrub the paste away with a brush.
Prevent mould from growing back on your walls by drying wet areas immediately, inspecting the exterior of your house regularly to check for leaks, and opening windows to allow fresh air to circulate the property.
This guide focused on simple ways to remove mould from walls without using bleach. Discover more environmentally-friendly cleaning tips on our blog.
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