Roof Waterproofing in Singapore – Quick Guide
Posted on -
10 September 2025
Waterproofing Specialists Near by
HIGH TECH ROOFING COMPANY & mod 08.Sep.2025
Roof Waterproofing Specialist Works in Singapore
| Topic |
Key Takeaways |
| Cost |
SGD 1,000 – 3,000 per m² (average) |
| Common Systems |
Bitumen‑based, Liquid membranes, Polyurethane, Cementitious coatings |
| Best Pick (for most roofs) |
Liquid‑applied waterproofing (e.g., Sika‑WaterGuard, Eco‑K) |
| Choosing a Pro |
Credentials, past work, warranty, after‑care, and pricing transparency |
1. What Does a Roof Waterproofing Job Cost in Singapore?
| Roof Type |
Size |
Typical Cost per m² |
Total (est.) |
| Flat residential (single unit) |
30 m² |
SGD 1,200 – 1,800 |
SGD 36–54 k |
| Flat residential (condo unit) |
30 m² |
SGD 1,500 – 2,200 |
SGD 45–66 k |
| Commercial flat roof (shop/office) |
300 m² |
SGD 1,200 – 2,000 |
SGD 360–600 k |
| Low‑sloped commercial (solar panel) |
200 m² |
SGD 1,300 – 2,300 |
SGD 260–460 k |
What drives the price?
• Roof area & slope
• Existing roof condition (damage, age)
• Material choice (bitumen vs. liquid membrane)
• Labor market rates (Singapore is a premium labour market)
• Additional services (inspection, drainage repair, ventilation)
Tip: Ask for a break‑down of the quote – material vs. labour vs. prep work. A clear itemised quote is a sign of a professional.
2. Types of Residential & Commercial Waterproofing
| Category |
Typical Materials |
Ideal Use |
Pros |
Cons |
| Bitumen‑Based |
SBS or TCW (Thermoplastic Water‑Proofing) |
Flat roofs, parking decks |
Low cost, quick application |
Susceptible to UV/temperature cycles; needs periodic maintenance |
| Polyurethane Membrane |
100% PU, PU‑Resin |
Residential roofs, low‑sloped roofs, metal roofs |
Excellent flexibility, fast cure, UV‑stable |
Higher cost, needs skilled labour |
| Liquid‑applied Membrane |
Acrylic, Silicone, EPDM liquid |
Flat & low‑sloped roofs, solar panel decks |
Seamless coverage, self‑repairing cracks, wide colour choice |
Requires proper surface prep, longer cure time |
| Cementitious Coatings |
Portland cement + waterproofing additives |
Low‑sloped roofs, concrete surfaces |
Cheap, easy to apply, can repair on‑site |
Not ideal for high‑sloped roofs; may crack |
| Composite (Bitumen + Reinforcement) |
Bitumen + polyester/reinforced fabric |
Commercial flat roofs, parking garages |
Strong, long‑life, easy to repair |
Bulkier; requires some shrinkage control |
Residential‑vs‑Commercial Nuances
| Factor |
Residential |
Commercial |
| Roof area |
30–200 m² |
200–5,000 m² |
| Load |
Light (people, furniture) |
Heavy (storage, equipment) |
| Regulations |
Local building codes |
Fire safety, fire‑resistive membranes |
| Maintenance |
DIY upkeep, inspections |
Professional monitoring, insurance coverage |
3. The “Best” Waterproofing Method in Singapore
Liquid‑applied waterproofing (e.g., Sika‑WaterGuard, Eco‑K, or Basco‑Seal)
Why it’s top‑choice:
| Reason |
Explanation |
| Seamless coverage |
No joints → fewer leak points |
| Fast‑curing |
24–48 h drying for full strength |
| UV & chemical resistance |
Singapore’s humid tropical climate + rooftop chemicals |
| Self‑repair |
Minor cracks “heal” as the material re‑flows |
| Adaptable to complex geometry |
Easy to apply around vents, skylights, HVAC units |
When to consider alternatives
| Scenario |
Suggested System |
| Extreme heat & UV |
Silicone or Acrylic liquid membrane |
| High load & wind |
Reinforced composite (polyester+bitumen) |
| Budget constraints |
SBS bitumen (TCW) – cheaper but needs regular maintenance |
4. How to Choose a Good Waterproofing Specialist
| What to Check |
How to Verify |
| Licensing & Certifications |
Check Singapore Civil Engineering Consultants Council (SCECC) or Malaysia Institute of Building for a valid licence. |
| Experience with similar roofs |
Request case studies or project references in residential or commercial categories matching yours. |
| Material Knowledge |
They should recommend the right product for your roof type, climate, and load. |
| Warranty & After‑Care |
Look for a minimum 5‑year guarantee on workmanship + material. |
| Insurance Coverage |
Confirm they carry public liability and workers’ compensation insurance. |
| Transparent Pricing |
Written, itemised quote with material, labour, and optional services. |
| Reputation & Reviews |
Check Google, Houzz, or local forums like MyCondominium for reviews. |
| Payment Terms |
30% upfront, 30% mid‑project, 30% upon completion. Avoid “all cash” or “full payment before work starts.” |
Quick Checklist Before Signing
- Ask for a written contract – scope, schedule, cost, warranty, and completion date.
- Request a pre‑project inspection – ensures roof conditions are documented.
- Confirm brand and type of waterproofing product – ensure it’s suited for your roof’s climate and usage.
- Schedule a post‑installation visit – to inspect workmanship and verify seal integrity.
- Keep all invoices & warranties – for future maintenance or resale.
Bottom Line
- Budget: Expect SGD 1,200 – 2,000 per m² for a quality waterproofing job; bigger roofs can cost more due to labour and material.
- Best System: Liquid‑applied waterproofing offers a seamless, durable solution most suited to Singapore’s tropical environment.
- Choosing a Specialist: Look for licensed, experienced contractors who provide clear warranties, transparent pricing, and solid references.
Pro‑Tip: Plan a periodic roof inspection (at least twice a year) and keep a maintenance log to catch potential leaks before they become major problems. Happy roofing!
