WATERPROOFING OF BATHROOM

BATHROOM WATERPROOFING

Preparation for bathroom waterproofing :
  • During completing the plaster work on wall left the below part of 450 mm height from the finish floor level without plastering.
  • Complete the grooving and chiseled work of water lines and electrical conduits before starting waterproofing work.
  • Remove all debris from the bathroom and chip extra mortar which is stick with the base slab.
  • Make the holes in the external for connecting nahini trap to external drainage line and water leakage drain pipe.
  • Clean the bathroom thoroughly with water. Mark the level on the wall of the bathroom with respect to floor level to set up the trap level.


Base coat for bathroom waterproofing :
  • Check any leakage in the slab before commencement of base coat. If observed provide socketing method to repair any serious leakage.
  • Apply 15 to 25 mm thick base coat in proportion of 1:4 With the slope of 1:100 from door entrance towards the nahini trap.
  • This base coat should cover the all wall upto 450 mm height from the finish floor. 
  • Cure this base coat to minimum 4 days.
  • Fix the nahini trap and  drain pipe over this base coat.
Brick bat coat for waterproofing : 

  • Take well burnt bricks for laying and immersed them in water to get wet thoroughly for 30 mins.
  • lay the brick on the edges, not on the flat surface.
  • Any gap between the bats should be filled with the mortar.
  • Complete the brick bat coat with joints filled with cement mortar proportion of 1:6. Also use the waterproofing compounds in cement mortar.
  • Give a slope of 1:100 in brick bat coat from entrance door towards water escaping pipe or drain pipe.
  • After set this coat Keep it in water for 4 days curing period.
Topping coat for waterproofing :
  • After curing of the brick bat coat, Provide topping coat of cement mortar of proportion 1:4 with water proofing compound use of 1 to 2 % on weight of cement.
  • Finish this final coat with metal float.
  • Rough the surface by wire brush for adhesion of tile fixing above it.
  • Continue this coat on wall upto 450 mm height from the finish floor level of wc. This coat should not project from plastering layer.

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