Key Statistics
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Common Mould Areas in HDB Flats
Bathrooms
Ceiling corners, grout lines, behind toilet, exhaust fan areas - HDB bathrooms trap moisture easily.
Bedrooms
Behind wardrobes, window frames, aircon units, walls facing other units with poor ventilation.
Service Areas
Kitchen backsplash, under sink, laundry area, bomb shelter with limited airflow.
Why HDB Flats Are Prone to Mould
- High Humidity Trapping: Singapore's 80-90% humidity + enclosed HDB design creates moisture traps
- Limited Ventilation: Corner units, facing other blocks, small windows reduce natural airflow
- Lower Floor Disadvantage: Ground to 5th floor units receive less sunlight, more moisture from plants
- Shared Wall Moisture: Moisture transfer from neighbors' units through shared concrete walls
- Aging Infrastructure: Older HDB flats (built before 2000) have aging pipes, waterproofing issues
- Water Seepage: Common issues: upstairs neighbor leaks, external wall seepage during heavy rain
- Insufficient Exhaust: Weak or non-functional bathroom exhaust fans fail to remove moisture
- Aircon Condensation: Improperly drained aircon units create moisture accumulation
HDB Mould Removal Pricing
| Service | Price Range | Duration |
|---|---|---|
| Single Room Treatment | From $200 | 1-2 days |
| 2-3 Room Treatment | From $500 | 2-3 days |
| Full Flat (3-4 rooms) | $800-$1500 | 3-5 days |
| Full Flat + Painting | $1500-$3000 | 5-7 days |
Prevention Tips for HDB Flats
- Run exhaust fans 24/7 in windowless bathrooms
- Keep wardrobes 5-10cm away from walls for air circulation
- Use dehumidifier during monsoon season (Nov-Jan)
- Open windows daily for cross-ventilation
- Service aircon every 3 months
- Report water seepage to HDB immediately (1800-225-5432)
- Coordinate with neighbors for shared wall moisture issues
- Check and clean floor trap regularly
- Apply anti-mould paint during renovation
- Dry laundry in service yard, not inside closed rooms
Frequently Asked Questions
Why do HDB flats get mould in Singapore?
HDB flats are prone to mould due to Singapore's high humidity (80-90%), limited ventilation in some unit layouts, older plumbing systems in pre-2000 flats, shared walls allowing moisture transfer, and bathroom moisture buildup. Lower floors (ground to 5th) and corner units face higher risk due to less sunlight and airflow.
How much does HDB mould removal cost?
HDB mould removal costs $200-$1500 depending on severity and affected areas. Single room treatment starts from $200, 2-3 rooms from $500, full 3-4 room flat from $800-$1500. Includes inspection, treatment, sealing, and warranty. Free transparent quote provided after inspection.
Can HDB help with mould problems in my flat?
HDB can help with mould caused by structural defects like leaking pipes, water seepage from external walls, or upstairs neighbor leaks. Call HDB hotline 1800-225-5432. For general mould from humidity and maintenance issues, homeowners are responsible. Professional mould remediation is recommended for severe cases.
Do lower floor HDB flats get more mould?
Yes, lower floor HDB units (ground to 5th floor) typically experience more mould due to less direct sunlight, higher humidity from surrounding vegetation, reduced natural ventilation, and cooler temperatures. However, proper ventilation, dehumidifiers, and regular maintenance can effectively control mould growth.
How long does HDB mould removal take?
Single room treatment takes 1-2 days, 2-3 rooms take 2-3 days, full flat treatment takes 3-5 days depending on severity and extent of damage. This includes inspection, mould removal, waterproofing, and drying time.
Is HDB mould removal covered by insurance?
Home insurance may cover mould removal if caused by insured perils like burst pipes, fire damage, or sudden water damage. General mould from humidity or lack of maintenance is typically not covered. Check your policy or consult your insurer.
