Technical Guide
Waterproofing Wet Areas In Buildings
The areas in residential or commercial buildings that call for waterproofing effectively are the wet areas: Toilets and bathrooms. These areas need to be "water-proofed" at the construction stage only. Otherwise after the tiling and sanitary fittings and fixtures are completed and there arises any leakage, the jobs of attending to the problems, at that stage would be costly and cumbersome.
The usual construction practice adopted is to have a drop or a sunken slab Fig.1 the RCC slab forms a sort of a mini tank having a side outlet for drainage pipe. Further the normal slab also has one more small sunken area for the "Nahni Trap"
Firstly it is essential to have the concrete in this construction to be good quality and sound. A proper slope also has to be provided in the slab so that water will drain off quickly without stagnation. The waterproofing should be carried out by having Polymer based chemicals and Cement mix applied directly over the structural slab. (Consult Our Engineer for detailed application procedure) over this waterproof layer further finishing like plaster tiles etc. can be taken up.
It is also necessary to take this waterproof layer onto the walls and up till a height of 3 ft or the level of glazed tiles.