As the first real winter soakers begin to hit parts of South Africa, households are facing an unwelcome seasonal guest: mould.

With the Western Cape bracing for its annual winter rains and unseasonably late rainfall already falling in other parts of the country, many families are keeping windows shut, heaters running and laundry indoors to dry. While practical, these habits can trap moisture inside the home, creating the perfect environment for mould to grow.

As the first real winter soakers begin to hit parts of South Africa, households are facing an unwelcome seasonal guest: mould.

Trevor Brewer, Director at lifestyle technology specialist Solenco, says humidity is often linked to hot summer weather, but colder months can be just as problematic.

Warm indoor air meeting cold walls and windows creates condensation, and with limited ventilation, dampness builds up quickly.

“Mould grows when moisture and poor airflow come together. During colder, wetter weather, we tend to keep our homes sealed, and everyday activities like showering, cooking and drying clothes indoors add moisture that has nowhere to escape,” said Brewer.

The first signs of mould are often easy to spot. It may appear as black, green, brown or white spots, fuzzy patches or dark stains.

Paint can bubble or peel, wood may warp and a lingering musty smell often signals hidden dampness. Mould commonly develops behind furniture, inside cupboards, on ceilings and around windows where condensation collects.

Beyond damaging walls and furniture, mould can also affect health. Sneezing, coughing, blocked noses, irritated eyes, skin rashes and headaches are some of the symptoms people may experience.

Children, older adults and people living with asthma, allergies or weakened immune systems are especially vulnerable. In many cases, symptoms improve once a person spends time away from the affected home.

Simply wiping away mould does not solve the underlying problem. The moisture in the air remains, allowing mould to return.

“Dehumidifiers are often thought of as appliances, but they’re really home protection systems, and people buy them to solve real problems,” said Brewer.

“A quality dehumidifier removes hidden moisture before it becomes visible damage or a health concern,” said Brewer.

According to Brewer, modern dehumidifiers are built to work quietly and efficiently across larger living spaces, helping reduce dampness throughout the home rather than only in one corner.

“It’s not just about extracting moisture near the dehumidifier. It’s about circulating air effectively, so that dampness is quickly reduced throughout the home,” said Brewer.

Brewer said newer-generation systems, such as the MeacoDry Arete Two 20L, are designed for whole-home moisture control, with strong airflow and medical-grade HEPA filtration that help maintain healthy humidity levels across several rooms.

“If you stop the humidity, you stop the mould. It’s about creating a healthier, more comfortable indoor environment, no matter what the weather is doing outside,” said Brewer.

Solenco, a South African air treatment and lifestyle technology company, says controlling indoor moisture is one of the most effective ways households can protect their homes during the colder, wetter months.

Humidity is often linked to hot summer weather, but colder months can be just as problematic. Warm indoor air meeting cold walls and windows creates condensation, and with limited ventilation, dampness builds up quickly.