You crank up the hot shower, steam fills the room, and somewhere behind your tiles — mould is quietly winning.
Winter is peak season for bathroom mould, and it spreads faster than most people realise. Here’s how to get ahead of it.
Why Winter Makes It Worse
Cold air outside + hot steam inside = condensation sitting on every surface. Couple that with windows staying shut and bathrooms drying out slower, and you’ve got the perfect breeding ground. Mould can start forming on grout, silicone and ceiling corners within 24–48 hours of consistent moisture.
The Spots Most People Miss
Everyone sees the grout. But mould hides in:
Run your extractor fan for at least 15 minutes after every shower — not just during it. Most people turn it off when they leave the room. That’s when the condensation is actually sitting on the walls.
No extractor fan? Crack a window or leave the door open. Airflow is the single biggest factor in bathroom mould prevention.
If mould is appearing on the ceiling in multiple spots, returning within weeks of cleaning, or you can smell it but not fully see it, it’s likely behind the wall or in the ceiling cavity. That’s not a cleaning job, that’s a remediation job, and worth getting assessed before it spreads further.
Jim’s Cleaning offers professional bathroom and mould cleaning services right across Australia. Find your local Jim’s Cleaning team at www.jimscleaning.com.au.
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