Waterproofing · Singapore
Roof Waterproofing & Roof Leak Repair
Singapore's heavy rain finds every weak point in a roof. We repair leaks at the source and waterproof flat roofs so they stay dry through monsoon season.
Roof waterproofing seals flat concrete roofs, terraces, joints and gutters against Singapore's heavy rain, usually with a liquid-applied or sheet membrane. For a single failed joint or flashing, a targeted repair may be enough; for an aged roof with cracks and ponding, the whole surface needs a new waterproofing layer.
Last updated November 2026
What we waterproof
- Flat concrete roofs and rooftop terraces
- Roof joints, flashings and parapet walls
- Concrete gutters and downpipes
- Balconies and planter boxes
Repair or full waterproofing?
A single leak point, such as a failed flashing or cracked joint, can often be repaired on its own. If the whole roof surface has aged, with cracks and ponding water across it, a new membrane or coating over the full area is the lasting fix. We inspect first and recommend the option that solves the problem for the least cost.
HDB top-floor flats
If you live in a top-floor HDB flat and the leak is coming from the roof, contact your Town Council first. The roof is common property and they handle roof repairs.
For pitched, metal or tiled roofs, see roof repair.
How we work
- InspectWe find where the water is actually coming from: tiles, grout, floor trap, pipes, walls or roof.
- QuoteYou get a clear written quote with the method and timeline before any work starts.
- RepairWe fix the source with the right system: nano sealant, PU injection, membrane or roof coating.
- TestWhere the method allows, we water-test before handover so you can see it holds.
Frequently asked questions
Can you repair a roof leak during the rainy season?
Inspection can happen any time, and rain actually helps find the leak. Coatings and membranes need dry weather to apply, so that part is scheduled around the forecast.
Do you work on landed houses and shophouses?
Yes, as well as commercial and industrial buildings.
My HDB top-floor flat leaks from the roof. Can you help?
Please contact your Town Council first. The roof is common property and roof repairs are their responsibility.