Roof & Flat Roof Waterproofing in Singapore
A roof endures Singapore’s heaviest rain and harshest sun. We waterproof RC flat roofs, pitched roofs and box gutters with exposed-grade systems engineered to handle thermal movement, ponding and UV without cracking.
Signs you need this
- Water stains on the top-floor ceiling after heavy rain
- Ponding water that lingers on a flat roof
- Blistering or cracking of the existing roof coating
- Rust streaks or damp around roof drains and gutters
- Vegetation or moss growing on the roof surface
How we fix it properly
We assess the roof’s falls, drainage and existing build-up before specifying a system. For exposed RC roofs we favour reinforced liquid-applied or torch-on membranes that bridge cracks and tolerate thermal movement.
Detailing is where roofs usually fail, so we reinforce every upstand, drain outlet and penetration. Where ponding is the underlying issue we build up falls so water actually reaches the drains.
For commercial and MCST buildings we can stage works to avoid disrupting operations and provide maintenance recommendations to extend the system’s life.
Common causes we look for
- Aged membrane that has gone brittle under UV
- Inadequate falls causing water to pond
- Cracks at parapet upstands and drain outlets
- Blocked or undersized roof drainage
Our roof process
- 1
Roof survey
Assess falls, drainage, upstands and the existing system.
- 2
Repairs & falls
Patch cracks and build up falls to drains.
- 3
Membrane
Reinforced exposed-grade membrane with detailed upstands.
- 4
Drainage check
Clear and seal outlets; confirm free drainage.
- 5
Flood test
Verify the finished roof sheds and drains correctly.
Roof FAQs
Still unsure? A free assessment answers everything specific to your property.
Get a free, honest assessment
Tell us what you’re seeing — we’ll take it from there.
How long does roof waterproofing last?
A properly specified and detailed exposed membrane typically lasts many years, depending on the system and exposure. We recommend a periodic assessment to clear drains and catch wear early, which significantly extends its life.
Do I need to remove the old roof coating?
Only if it has failed or is incompatible with the new system. Where the existing layer is sound and compatible we can overlay it after preparation, which saves time and cost.
Related services
All servicesExternal Wall Waterproofing
Driving rain and wall cracks sealed from outside so interior walls stay dry, paint stops peeling and mould stays away.
Balcony & Planter Box Waterproofing
Outdoor areas and planter boxes sealed against constant moisture so water never tracks back into the living room.
Basement & Car Park Waterproofing
Below-ground structures sealed against hydrostatic water pressure to keep basements, lift pits and car parks dry.
Need roof help today?
Book a free, no-obligation assessment or call our 24/7 line. Honest diagnosis, no unnecessary hacking.