Interior Walls Waterproofing Effectively
The situation for these areas in the house has a completely different scenario. The walls and the floors are wet all the time in one way or another. Since these rooms are adjacent to each other, water leak through one room will ruin the other room walls and its other property. The essential thing here is that water only flows through drain pipes. Waterproofing during construction/while renovation will ensure you will never have to face any issues later.
4 main areas are targeted during proofing – Floor Tiles Joint, Shower splash zone, Sanitary fittings and Drainage pipes.
Water seal Tape – PVC like tape – used to seal fixture/pipes inserts, permanently. Use during pipe and fixture laying.
Waterproof grout (mixture of cement concrete with waterproof solution) – A free flowing, expanding grout. This fills gap between pipe inserts into concrete/ masonry walls and floors. It is non-shrinking and fast setting material providing long lasting water tight seal.
Waterproof coat – Advanced performance – cementitious polymer based waterproof coating. Highly elastic material providing up-to 1 mm of thickness from 2 coats -( x1 horizontal; x1 vertical)x2. It usually comes in per-measured combination of liquid and powder – mixed in equal proportions. Brush apply to all the areas, specially shower, under sink etc. Apply a layer of screed( leveled layer of cement). Then the pipes and nahani traps are fixed with the support of brick bat coba layer to keep them in position.
Tiles and other bathroom fixtures – fitted after 48-72 hours of hardening period.
Waterproof sealant – An elastic based adhesive acrylic sealant – comes in a tube. Applied to all the edges and corners – sinks and bathtub. Extra sealant is applied to the floor level edges and chajja of windows and balcony because the water usually retains at those places. CAUTION: Avoid using low quality white cement putty as it tends to beak and get dirty with time.
Primer – Adds protection after tiling and plastering of surface. A layer of acrylic based primer. dry up time 4-5 hours. Primer fills any small gaps and cracks.