IN SHORT
- Hot showers put a lot of moisture into a small room.
- Exhaust fans that vent into the roof space move the problem rather than remove it.
- Leaks behind tiles and in grout lines feed growth out of sight.
- Squeegee and ventilate after showers until surfaces are dry.
Condensation
Every hot shower fills the room with steam, which condenses on cooler ceilings, walls and glass. If those surfaces stay damp, common indoor moulds such as Aspergillus and Penicillium can grow.
Ventilation
Mould needs moisture, and if bathroom air isn't exhausted outside, the moisture stays. Many exhaust fans discharge into the roof space rather than outdoors, which can leave damp air sitting in the roof and lead to growth there too.
Leaks
Beyond steam, water getting behind tiles and into grout lines gives mould a hidden, constantly damp place to grow. Check for leaks around the shower, behind tiles and under the vanity.
What helps
- Make sure the exhaust fan vents directly outside.
- Run the fan during and after showers until surfaces are dry.
- Squeegee tiles and glass after showering.
- Check regularly for leaks behind tiles and under sinks.
Physically removing mould matters, but if the moisture stays, you can end up cleaning the same patch again and again.
WHERE DRYSAFE FITS
Our packages remove growth from affected vertical surfaces with a HEPA vacuum and apply a TGA-listed antimicrobial, and bathroom ceilings are covered by the HomeProtect upgrade. Mould needs moisture, so we take readings and understand where the moisture could potentially be to help you take the right steps to prevent it from reoccurring.