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Understanding Mould: What It Is, Why It Grows, and What You Can Do About It

Mould is something most of us have come across at some point. It might show up as black spots on a bathroom ceiling, green fuzz on food, or patches behind furniture you haven’t moved in a while. But what exactly is mould, and why does it keep turning up in our homes?

Here’s a straightforward look at what you need to know.

What Is Mould?

Mould is a type of fungus that thrives in damp, humid spaces. It spreads through microscopic spores in the air and can grow on a variety of surfaces. You’ll usually find it in places that stay damp, such as bathrooms, laundries, kitchens, windowsills, and under floors.

It can be black, green, brown, grey or even pink, and sometimes you won’t see it until it starts to cause damage or smell.

Understanding Mould: What It Is, Why It Grows, and What You Can Do About It -

Why Does Mould Grow Inside Homes?

Mould needs three things to grow: moisture, organic material (like timber, paper, fabric or dust), and still air. In homes, that usually means:

  • Condensation on windows and walls
  • Leaking pipes or roofs
  • Poor ventilation in bathrooms, laundries, or kitchens
  • Flooding or storm damage
  • Unsealed subfloors or rising damp

Once it finds a spot with enough moisture and not much airflow, it can start to spread. If you’ve had water damage or high humidity and you notice mould returning even after cleaning it, it’s likely that the underlying issue hasn’t been fixed.

Can Mould Affect Your Health?

It can. Mould releases spores into the air that may trigger reactions in some people, particularly those with asthma, allergies or weakened immune systems. Symptoms might include sneezing, coughing, itchy eyes, skin irritation or breathing difficulties.

Even if you’re not sensitive to mould, large or hidden infestations can affect air quality and make a home feel damp or uncomfortable.

What Should You Do If You Find Mould?

Small patches on tiles or glass can often be cleaned with mild detergent and water. But if the mould keeps coming back, or if it’s growing on porous materials like plasterboard, carpet or timber, it’s best to get it checked properly.

Recurring mould is often a sign that there’s too much moisture or poor ventilation. Cleaning alone won’t solve it if the root cause isn’t addressed.

Prevention Is Key

The best way to prevent mould is to keep your home dry and well ventilated. Simple things that help include:

  • Using exhaust fans when cooking, showering or doing laundry
  • Opening windows, when possible, to let fresh air circulate
  • Repairing leaks as soon as they’re noticed
  • Drying out any wet areas quickly
  • Keeping furniture slightly away from the walls to avoid trapped moisture

Homes of all ages can experience mould problems, especially during periods of wet weather or high humidity.

If you’re noticing signs of mould or just want to be sure your home is dry and healthy, it might be time for a proper check.

Benefits of a Mould Inspection

A mould inspection does more than confirm whether there’s mould in your home. It helps uncover the causes, assess the extent of the issue, and guide you on what to do next. Here’s why booking a professional mould inspection is worth it:

Understanding Mould: What It Is, Why It Grows, and What You Can Do About It -

1. Find Hidden Moisture Problems

Mould often grows in places you can’t see, like behind walls, under flooring or in the ceiling. An inspection uses moisture metres and other tools to detect these hidden damp areas before they become bigger issues.

2. Protect Your Health

If you or anyone in your household has asthma, allergies or respiratory issues, mould can make symptoms worse. Identifying and removing mould safely helps improve indoor air quality and reduces potential health risks.

3. Prevent Structural Damage

Unchecked mould can damage plasterboard, timber, insulation and flooring over time. A mould inspection helps catch it early, before it causes serious structural problems or leads to costly repairs.

4. Understand the Cause

Whether it’s poor ventilation, rising damp or a leak in the roof, a proper inspection can pinpoint what’s creating the conditions for mould to grow. That way, you can fix the cause, not just clean the surface.

5. Get Professional Advice

You’ll receive a clear report with practical steps to fix the issue and prevent it from returning. This might include suggestions around ventilation, building repairs or drying out damp areas properly.

6. Peace of Mind

Even if no mould is found, knowing your home is dry and healthy offers reassurance. This is especially important if you’ve recently had flooding, moved into a new property, or manage a rental or commercial building.

Call our team on 0488 885 203 to book or alternatively, Order an Inspection online or get an Instant Quote and find out what’s really going on behind the walls or under the floors. A little knowledge now can save you a lot of trouble later.