There are so many myths about waterproofing. The people dealing with construction are normally different from people using such facility or maintaining them. Either of them passes on the blame on each other, and this ends in an unnecessary and expensive treatment to places, hardly susceptible to leakage, while real culprit is somewhere else, and gets altogether neglected. This may be the result of inadequacy of individual's knowledge of behavior of parent material so far its resistance to water ingress is concerned and Porosity of building materials, especially that of concrete, and knowledge of the waterproofing treatment adopted.