Mould matters STOP THE SPREAD

We speak to the experts to find out how to best tackle household mildew before the rot sets in

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Not all mould is bad. After all, it helps convert grapes to wine, milk curd to blue cheese and has even contributed to medical breakthroughs like penicillin. But that’s very cold comfort when this living organism invades clothes, ruins timber and starts causing allergies and flu-like symptoms.

Microbiologist and fungi expert Professor Dee Carter says one of the biggest misconceptions about mould is that its effects are often underestimated.

HEALTH HAZARD

Mould and mildew not only affect houses by causing unsightly stains and a musty smell — they can affect people too. “Mould becomes a problem when it grows to levels that start to release spores or volatile chemicals,” says Dee. “These are what provoke allergies and immune-related illnesses.”

Mould can grow on almost any surface year-round and it’s hard to destroy. It usually appears as black, brown or green spots, and thrives in damp, warm or humid environments.

While mildew is technically a type of mould — you can't miss its strong odour — it commonly grows as a fuzzy white buildup in bathrooms. However, it can occur anywhere in poorly ventilated homes that are prone to dampness.

“Mould can be dangerous if it builds up to high levels,” says Dee. “People vary in their sensitivity, but for some people, mould will induce cold or flu-like symptoms and general malaise.” It can be even more hazardous for babies and young children.