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Bathroom Condensation and Mould: A Prevention Guide

STEP-AHEAD Team
2 min read
Bathroom Condensation and Mould: A Prevention Guide

Stop condensation and mould before they start. Here are the practical steps that keep a bathroom dry, fresh and mould-free.

Mould is a symptom of moisture that lingers. Control the moisture and you control the mould. Here is our prevention checklist.

Ventilate Properly

An effective extractor fan that vents outside is the foundation. Humidity-sensing fans run automatically when moisture rises and switch off once the air is clear.

Keep Surfaces Warmer

Condensation forms on cold surfaces. Underfloor heating, a heated towel rail and good insulation raise surface temperatures and cut condensation.

Maintain Sealant and Grout

Use sanitary-grade silicone with fungicide and keep grout in good condition. Mould embedded in old sealant needs the sealant replaced, not just cleaned.

Daily Habits

Run the fan during and after showering, squeegee the screen and tiles, and leave the door open afterwards to let the room dry.

Design It Out

During a renovation we build in ventilation, heating and the right materials so condensation is designed out from the start.

Planning a bathroom project across East, North or South East London? Get a free, fixed-price quote from STEP-AHEAD Renovations — rated 9.34/10 on Checkatrade.

Frequently Asked Questions

How long should I run the extractor fan after a shower?

About 15 minutes after showering clears the remaining moist air. Humidity-sensing fans handle this automatically.

Why does mould keep coming back on my sealant?

Because it has grown into the silicone. Surface cleaning won't remove it — the sealant needs replacing with a sanitary, fungicidal silicone.

condensationmould preventionventilationbathroom maintenancehumidity