Common Water Ingress Points
- Bathrooms: Failed floor/wall waterproofing membrane
- Balconies: Rain exposure, cracked tiles, failed drainage
- External Walls: Rain penetration through cracks or porous render
- Windows: Gaps in sealing, condensation drainage
- Roof: Top floor units exposed to rain ingress
- Pipes: Leaking concealed plumbing
Waterproofing Methods
Membrane Waterproofing
Full waterproof membrane applied to floors and walls. Most comprehensive solution for bathrooms. Requires removing existing tiles.
Injection Grouting
Waterproofing chemical injected into cracks and gaps. Suitable for walls and ceilings without removing finishes.
Crystalline Waterproofing
Penetrating sealer that crystallizes within concrete. Suitable for external walls and balconies.
Surface Sealers
Topical coatings for tile grout and minor water seepage. Temporary solution for minor issues.
Waterproofing Pricing
| Service | Price Range | Duration |
|---|---|---|
| Bathroom (Full) | $1,500-$3,500 | 3-5 days |
| Balcony | $800-$2,000 | 2-3 days |
| External Wall | $1,000-$3,000 | 2-4 days |
| Injection Grouting | $500-$1,500 | 1-2 days |
Frequently Asked Questions
Why is waterproofing important for mould prevention?
Water ingress is the primary cause of mould. Without proper waterproofing, moisture enters through walls, floors, and surfaces, creating conditions for mould growth. Fixing the water source is essential for permanent mould prevention.
How long does bathroom waterproofing last?
Quality bathroom waterproofing lasts 10-15 years. Factors affecting longevity include membrane quality, installation technique, and maintenance. Signs of failing waterproofing include water stains on ceiling below, mould recurrence, and peeling paint.
Can waterproofing be done without hacking tiles?
Yes, some waterproofing methods like injection grouting and surface sealers can be applied without hacking. However, for severe damage or complete bathroom renovation, full waterproofing with membrane requires removing tiles.
How much does waterproofing cost in Singapore?
Bathroom waterproofing costs $1,500-$3,500 depending on size and method. Balcony waterproofing is $800-$2,000. External wall treatment varies by area. Costs include surface preparation, membrane application, and finishing.