What sustainability are you talking about when every third building develops leaks within ten years of it's life time?
You go to any building exhibition, the stalls are occupied by the kitchen and bathroom companies. The next is by the construction chemicals companies. None of these chemicals can replace good craftsmanship. But unfortunately over the years, the quality of workmanship has come down drastically, thereby the durability of buildings is also suffering very badly. A study done in UK in the early 1970s has shown that one third of the government buildings built with concrete is leaking and it was referred to as the "Flat Roof Scandal" by the Architectural Review magazine in 1972.
Photo is from the project "Vishram on the Sea" designed by us