Mould is an unwelcome guest in many British homes. It can hide behind wallpaper, under floorboards, or in corners where dampness lingers. Often, it’s only discovered when the smell becomes noticeable or when health problems start to appear – but the earlier you spot the signs, the easier it is to stop the problem before it spreads. Here’s a guide to recognising mould and what to do if you suspect it’s taken hold in your home.

What Is Mould – and Why Does It Appear?

Mould consists of microscopic fungi that thrive in damp, poorly ventilated environments. It’s naturally present in the air around us, but it becomes a problem when it finds the right conditions to grow indoors. This usually happens when there’s excess moisture, condensation, or water damage that hasn’t been properly dried out.

The most common causes include:

• Leaking roofs, windows, or pipes that allow moisture into walls and ceilings.
• Poor ventilation in bathrooms and kitchens.
• Cold bridges, where warm and cold air meet and create condensation.
• Drying clothes indoors without adequate airflow.

Once moisture is trapped, mould can grow on almost any surface – from wallpaper and plaster to wood, fabric, and furniture.

The Visible Signs – What to Look For

Mould often appears as dark, green, or grey patches on walls, ceilings, or around window frames. But it can also be more subtle. Here are some of the most common signs:

• Discolouration: Small spots that gradually spread, especially in corners, behind furniture, or near windows.
• Musty smell: A persistent, earthy odour that doesn’t go away even after airing out the room.
• Peeling paint or wallpaper: Moisture behind the surface can cause materials to bubble or lift.
• Condensation on windows: A sign of high humidity, which can encourage mould growth.

If you notice several of these signs, it’s worth investigating further – or getting professional advice to assess the extent of the problem.

When Your Body Reacts – The Hidden Symptoms

Mould doesn’t just affect your home; it can also impact your health. Some people are more sensitive than others, but even healthy individuals can experience symptoms if they’re exposed for long periods.

Typical symptoms include:

• Irritation of the eyes, nose, and throat.
• Headaches, fatigue, or difficulty concentrating.
• Coughing, wheezing, or worsening asthma and allergies.

If your symptoms improve when you’re away from home but return when you come back, mould could be the culprit.

How to Check Your Home

You can start by using your senses – look for visible signs, smell for mustiness, and feel for damp areas. If you want to be sure, you can use a mould testing kit or hire a professional to take air and surface samples.

It’s crucial to identify the source of the moisture, not just remove the mould itself. If the underlying damp problem isn’t fixed, the mould will almost certainly return.

Preventing Mould in Everyday Life

Prevention is all about keeping moisture under control and ensuring good ventilation. Here are some simple habits that make a big difference:

• Open windows for a few minutes each day to let fresh air circulate.
• Use extractor fans when cooking or showering.
• Avoid drying clothes indoors, or ensure good airflow if you must.
• Keep your home at a steady temperature – cold walls can cause condensation.
• Regularly check for leaks around windows, roofs, and pipes.

Small daily actions can prevent major problems later on.

What to Do If You Find Mould

If you discover mould, act quickly. Small patches can often be cleaned safely, but larger areas may require professional help.

1. Stop the source of moisture – repair leaks or dry out the area thoroughly.
2. Clean the visible mould – wear gloves and a mask, and avoid spreading spores.
3. Ventilate well – open windows to let moisture and spores escape.
4. Call in professionals if the mould covers more than a small area or if you experience health issues.

A qualified surveyor or environmental specialist can assess the situation and ensure the problem is properly resolved.

A Healthy Home Starts with Awareness

Mould can affect any home – old or new. But with a bit of attention and prevention, you can stop it from taking hold. Keep an eye out for dampness, ventilate regularly, and act fast if you see or smell something suspicious.

A healthy indoor environment isn’t just about comfort – it’s about your wellbeing and the value of your home. The sooner you spot the signs, the easier it is to protect both.