Common Wall Mould Locations
- Behind Furniture: Wardrobes, beds, sofas against walls trap moisture
- External Walls: Walls facing outside exposed to rain and sun
- Corner Walls: Poor air circulation in corners
- Shared Walls: Walls shared with neighbor's bathroom or kitchen
- Window Surrounds: Condensation around windows
- Below Windows: Rain splash and condensation dripping
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Causes of Wall Mould
Condensation
Cold walls (aircon on other side, external walls) meeting warm humid air causes water to form on wall surface.
Water Ingress
Rain penetrating through cracks, failed waterproofing, or porous external render.
Internal Leaks
Plumbing leaks within walls or from neighboring units.
Poor Ventilation
Furniture blocking walls, sealed rooms, inadequate exhaust in bathrooms/kitchens.
Prevention Tips
- Keep furniture 5-10cm away from walls
- Ensure adequate ventilation in all rooms
- Use dehumidifiers during monsoon season
- Check external walls for cracks regularly
- Report water ingress to building management
- Apply anti-mould paint on vulnerable walls
Frequently Asked Questions
Why is mould growing on my walls?
Wall mould grows due to moisture from condensation, external water ingress, internal leaks, or high humidity combined with poor ventilation. Walls behind furniture are especially vulnerable as air cannot circulate to dry them.
How do I prevent mould behind wardrobes?
Keep wardrobes 5-10cm away from walls to allow air circulation. Use silica gel or dehumidifiers in enclosed wardrobes. Ensure the room has adequate ventilation. Consider anti-mould paint on walls behind furniture.
Can external wall mould come from rain?
Yes, external walls can develop mould from rainwater ingress through cracks, failed waterproofing, or porous render. This is common in older buildings and requires waterproofing treatment.
How much does wall mould removal cost?
Wall mould removal costs $150-$400 per wall depending on size and extent. Includes cleaning, treatment, and anti-mould paint. Full room treatment with multiple walls is $400-$800.
