Waterproofing
Why Waterproofing Problems Often Appear Months After Handover
Why leaks show up in the first monsoon or the second year rather than at handover: capillary paths, thermal movement, untested systems and later damage — and what a warranty should cover.
A home can be handed over in April looking perfect and show a damp ceiling in August. This is not bad luck. Water finds the weakest point of a system, and the weakest point only gets tested when there is enough water, for long enough, at the right temperature.
Five reasons leaks are delayed
- The system was never tested under load. A terrace that was never flooded was never tested; the first monsoon is the test.
- Thermal movement opens hairline gaps. Summer heat expands the slab; the parapet junction, pipe collars and any rigid coating crack at their weakest joint.
- Capillary paths take time. Water travels slowly through untreated masonry and screed; a damp patch can appear weeks after the rain that caused it.
- Later work damaged the membrane. Railing posts, a tank platform, solar mounts or a dish antenna drilled through the terrace after handover.
- Grout and sealant were the only barrier. In a bathroom with no upturn, once grout wears the wall behind the tiles takes water.
What prevention looks like on paper
| Record you should have at handover | Why it matters |
|---|---|
| Dated ponding-test photographs (terrace, every bathroom) | Proof the system was tested before it was covered |
| Named system and thickness | Distinguishes a membrane from a paint |
| Warranty on waterproofing with a stated period | Ties responsibility to the builder, not the product |
| As-built drawing of terrace outlets and pipe runs | So later work avoids the membrane |
Our packages carry a contract-defined warranty on waterproofing and RCC under NorthCare™; whoever builds your home, ask for the warranty in writing and read what is excluded. The handover checks that catch the rest are in What Should Happen Before You Make the Final Handover Payment?.