If you’re experiencing water leaks, ceiling stains, or recurring dampness, roof waterproofing is often the most cost-effective long-term solution. One of the most common questions homeowners and building owners ask is:
“How much does roof waterproofing cost in Singapore?”
In this guide, we break down the price of roof waterproofing in Singapore, explain what affects the cost, compare waterproofing methods, and help you understand what you’re really paying for—so you can avoid cheap shortcuts that lead to repeated leaks.
Average Price of Roof Waterproofing in Singapore
The cost of roof waterproofing in Singapore typically ranges between:
💰 SGD $6 to $20 per square foot
However, the final price depends on several factors such as roof type, waterproofing method, surface condition, and accessibility.
Estimated Price Breakdown
| Roof Type | Estimated Price (SGD) |
|---|---|
| Flat concrete roof | $6 – $12 psf |
| RC rooftop (HDB / landed) | $7 – $15 psf |
| Metal roof | $6 – $10 psf |
| Tile roof | $8 – $18 psf |
| Balcony / toilet waterproofing | $10 – $20 psf |
⚠️ Prices that are too cheap often involve thin coatings, poor surface preparation, or non-certified materials—leading to leaks returning within months.
What Affects the Cost of Roof Waterproofing?
1. Roof Type & Structure
Flat concrete roofs are generally cheaper to waterproof compared to tile or pitched roofs, which require more labour and detailing.
2. Waterproofing Method Used
Different waterproofing systems come with different costs and lifespans (explained below).
3. Existing Roof Condition
If your roof already has:
-
Severe cracks
-
Ponding water
-
Old waterproofing layers
Additional repair and hacking works will increase the price.
4. Roof Size (Square Footage)
Larger roof areas typically enjoy lower cost per square foot, while small roofs may have a minimum project cost.
5. Accessibility & Height
High-rise buildings, landed properties with steep roofs, or areas requiring scaffolding will cost more.
Common Roof Waterproofing Methods & Prices
🔹 Cementitious Waterproofing
Price: $6 – $9 psf
Best for: Concrete roofs, toilets, balconies
Pros: Affordable, durable
Cons: Less flexible, may crack over time
🔹 PU (Polyurethane) Waterproofing
Price: $8 – $15 psf
Best for: Flat roofs, RC rooftops
Pros: Seamless, flexible, long lifespan
Cons: Higher upfront cost
🔹 Torch-On Membrane Waterproofing
Price: $10 – $18 psf
Best for: Large flat roofs, industrial buildings
Pros: Strong, proven system
Cons: Heat application, requires skilled workmanship
🔹 Acrylic Waterproof Coating
Price: $6 – $10 psf
Best for: Metal roofs, light protection
Pros: Fast application, UV-resistant
Cons: Shorter lifespan
Is Roof Waterproofing Worth the Cost?
Absolutely. Proper waterproofing can:
✅ Prevent structural damage
✅ Stop recurring leaks permanently
✅ Protect ceilings, walls, and electrical systems
✅ Increase property value
✅ Save thousands in future repair costs
Many homeowners spend more fixing repeated leaks than they would on proper waterproofing done once.
Signs You Need Roof Waterproofing
If you notice any of the following, waterproofing is likely required:
-
Water stains on ceilings or walls
-
Mold or musty smells
-
Cracks on roof surface
-
Peeling paint or bubbling plaster
-
Leaks during heavy rain
Delaying action often leads to higher repair costs later.
Cheap vs Professional Roof Waterproofing in Singapore
| Cheap Waterproofing | Professional Waterproofing |
|---|---|
| Thin coating layers | Correct system thickness |
| No surface prep | Proper cleaning & repairs |
| Short lifespan | 5–10+ years durability |
| No warranty | Written workmanship warranty |
| Leaks return | Long-term protection |
How to Get an Accurate Waterproofing Quote
To get the correct price, always request:
-
On-site inspection
-
Breakdown of materials used
-
Waterproofing method explanation
-
Warranty period (material + workmanship)
Avoid contractors who quote blindly without inspecting your roof.
Frequently Asked Questions (FAQ)
How long does roof waterproofing last?
Depending on the system used, 5 to 15 years with proper application.
Can waterproofing be done during rainy season?
Yes, but only during dry windows. Professional contractors plan work carefully.
Is hacking required for waterproofing?
Not always. It depends on existing conditions and failure level.
How long does waterproofing take?
Most residential projects take 1–3 days, excluding curing time.
Does HDB allow roof waterproofing?
Yes, but approval may be required for certain areas like top-floor roofs.
Final Thoughts: Roof Waterproofing Price in Singapore
The price of roof waterproofing in Singapore is a worthwhile investment when done correctly. While costs vary, choosing the right system and experienced contractor makes all the difference between a permanent solution and endless repairs.
If you’re comparing quotes, remember:
The cheapest waterproofing is often the most expensive in the long run.
Please contact us and we will provide you the best quote for your building waterproofing , water leak repair works.
Visitor Rating: 5 Stars
Extremely useful and informative. Thank you for the great article.