Mould around windows is a common problem, especially in homes where condensation and humidity levels rise. The good news? It’s preventable. In this guide, we’ll explain what causes mould, how to remove it safely, and the steps you can take to stop it coming back.
What is Mould?
Mould is a type of fungus that thrives in damp, poorly ventilated environments. It spreads quickly and is often found in bathrooms, kitchens, and, more frustratingly, around windows where condensation forms. If left untreated, it can grow into surrounding walls, woodwork, and soft furnishings.
Damage Mould Can Cause
Mould doesn’t just look bad. It can leave lasting cosmetic damage to walls, windowsills, and paintwork. Worse still, it can sink into porous surfaces like plaster, wood, and fabrics, where it becomes much harder to remove. Over time, this kind of damage can reduce the value of your home and lead to costly repairs.
Health Risk of Mould
Mould also poses a risk to your health. It releases tiny spores into the air that can trigger asthma, skin irritation, coughing, and allergic reactions. According to the NHS, certain types of mould, like black mould, can cause serious lung conditions. In rare cases, mould exposure has been linked to a fatal condition in infants known as acute idiopathic pulmonary haemorrhage. It’s not something to ignore.
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How to Spot Mould
Mould is usually easy to spot once it starts to take hold. Look out for dark green or black patches near your window frames, along the sealant, or on nearby walls. It often appears fuzzy or slimy and may be accompanied by a musty smell. Keep an eye on damp corners, window dressings, or condensation-prone spots, especially in winter.
How to remove mould from windows
If you’ve already noticed mould forming around your windows, it’s important to act quickly.
Start by mixing equal parts white vinegar and water in a spray bottle. Spray the affected area generously, let it sit for a few minutes, then scrub with a cloth or soft brush. Avoid bleach; it can irritate your lungs and isn’t effective on porous surfaces. Always wear gloves and keep the area well ventilated while you clean.
For stubborn mould, you may need to repeat the process. If your window frames are wooden and the mould has soaked in, it might be worth treating the area with a mould-resistant primer or paint afterwards.
How to prevent mould from coming back in the future
Once the mould is gone, prevention is key. These three simple habits will help stop it from returning.
Keep your home warm
Mould thrives in cold, damp environments. Keeping your home at a steady, comfortable temperature helps reduce condensation on windows and walls. In winter, aim to maintain consistent heating, especially in rooms prone to damp like bedrooms and bathrooms. A warm room equals drier surfaces, and that means mould is less likely to form.
Well ventilated
Airflow is one of the most effective ways to prevent mould. Open your windows daily, even if just for a short time, to let moisture escape. If your windows have trickle vents, keep them open; they’re designed to allow air to circulate without losing too much heat. In bathrooms and kitchens, extractor fans are essential. The goal is to stop damp air from lingering.
Keep it dry
Moisture is mould’s best friend, so removing it from the air is a smart long-term move. A dehumidifier can work wonders in rooms where condensation builds up regularly. They pull excess moisture from the air, making it harder for mould to take hold.
Also, take a look at what’s around your windows. Houseplants that are watered often can release moisture into the air, especially when placed on windowsills. Consider moving them back slightly or using a tray to catch excess water. And if you have heavy curtains or blinds, swap them for moisture-resistant window treatments like plantation shutters. They allow for better airflow and don’t absorb moisture the way fabrics do.
