Mould in Bathroom
Black mould in bathrooms is extremely common due to high humidity. It's unsightly, smells musty, and can trigger respiratory problems. The key is treating the cause, not just cleaning the mould.
📋 Routine - Plan AheadCommon Causes
Poor ventilation (no fan or fan inadequate)
Showering/bathing without ventilation
Leaking shower or bath seal
Cold walls causing condensation
Blocked extract fan
No heating in bathroom
Drying towels in bathroom
Signs of Bathroom Mould
Black spots on ceiling corners
Mould on silicone sealant around bath/shower
Musty smell in bathroom
Mould around windows
Peeling paint on ceiling
Black patches spreading on walls
Mould returning shortly after cleaning
🚨 What Happens If You Ignore This?
Bathroom mould indicates excess moisture that can damage decorations and spread to other rooms. Mould spores affect air quality and health, especially for asthmatics.
Why Do You Have Bathroom Mould?
Check Your Extract Fan
Hold tissue paper to the fan - it should be pulled towards it when running. If no suction, fan is blocked or broken. No fan at all? That's likely your problem.
Check Seals and Grout
Black mould on silicone indicates water getting behind. Cracked grout also allows water penetration.
Feel the Walls
Cold external walls are condensation magnets. Internal walls should be warmer.
Note Your Habits
Do you run the fan during/after showers? Open a window? Close the door to trap steam? These behaviours affect mould growth.
⚠️ Call a Professional If You Notice:
- •Mould returns rapidly after cleaning
- •Mould is on more than surface (in walls)
- •You have no extract fan
- •Fan isn't working properly
- •Mould is causing health issues
- •Silicone needs complete replacement
- •You suspect a leak
Solutions
🔧 DIY Solution
Difficulty: easy
- 1
Wear gloves and a mask when cleaning mould
- 2
Use mould killer spray (or 1 part bleach to 10 parts water)
- 3
Leave cleaner on for 20+ minutes before wiping
- 4
Replace mouldy silicone sealant (cut out old, apply new)
- 5
Always run extract fan during and 20 mins after showering
- 6
Open window slightly if no fan, or leave door open after
- 7
Wipe down wet surfaces after bathing
👷 Professional Solution
We install or upgrade extract fans (including humidity-sensing fans), improve ventilation, replace silicone professionally, and address underlying moisture sources.
Preventing Bathroom Mould
Run extract fan during bath/shower AND for 20 mins after
Install a humidity-sensing fan (runs automatically)
Wipe shower screens and tiles after use
Hang wet towels to dry outside bathroom
Keep bathroom door open after bathing (let moisture escape)
Heat bathroom in winter (radiator or heated towel rail)
Check silicone annually and replace when deteriorating
Use anti-mould paint on ceilings
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Contact UsStill Having Problems?
If you've tried the DIY solutions and still have issues, or if you'd prefer a professional to handle it from the start, we're here to help.
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