Before monsoon, ensure that all drains are cleaned. Provide a proper slope of 1:100 at least, with a mortar mixed with Nerolac Perma Waterproof Polymer.

Then use Nerolac Perma NoDamp, as a terrace waterproofing coating on the terrace house. It will protect the terrace in just 2-3 easy coats with a warranty of 8 years and even without breaking your existing terrace.

Being a UV resistant and foot trafficable coating, it can be left exposed to sun without any top screeding.