• Bathroom Ceiling Water leakage plumbing contractorbhai

Bathroom Leakage from upper floor

There are several reasons for leakage in Bathroom like damaged walls, mildew growth, etc. But before getting anything fixed/rectified, it’s most important to know the reason for leakage.

Reason 1

But if you have a second story bathroom or neighbors’ bathroom in the same place, the problem could be in water supply line or in one of the Bathroom Fittings – faucet or drains. Here the upper neighbor shall firstly try to find to cause of the leak. If the leakage is due to water supply line/drain line, than that shall be fixed first. Here the flooring will have to be compulsorily changed. Because the tiles would be affected by the leak which in future may crack/break. But while changing the flooring of the bathroom, water proofing should be done. Once the waterproofing is done, a home-owner need not worry for next 4-5 years (or even more).

Process of water proofing in existing bathroom.

  • Firstly the old tiles are broken and the surface is made smooth/in level for waterproofing.
  • The water proofing chemical then applied or sprayed on the surface and most importantly joints of wall. The chemical used is imported chemical.
  • The chemical is applied twice. Once the first coat is applied & then second coat is applied in next 2-3 hours. But see to it that the second coat applied is in different direction to the first coat i.e. if the first coat is applied vertically than the second coat shall be applied horizontally.

Reason 2

If you see a damp spot that reoccurs off-on on the ceiling than there are 99% chances for the leakage in drain pipe. This problem occurs when “Nani trap” or “nahani trap” is not fixed properly. Trap is basically small hole from where water flows outside of your bathroom. Fitting inside this outlet is known as “trap”. Only skilled contractors & mason workers know that it is important to place this trap covered by small pipe piece for extra protection. This is popularly called “vata” (common plumbing language of Mumbai)

“Vata” (pipe covering) is a small part that costs around Rs 50 to Rs 100, but this is ignored by most mason workers. This small measures can save 1000s if rupees in future.

You have S-trap and P-trap used for drain. The type of trap to be used is decided on the space availability. But here there’s a pipe running through the “Nani trap” that carries an additional pipe inside.

Reason 3

In some cases, there could be leakage in the fixture if it’s got rotten. Here you need to replace the entire fitting or diverter. There are chances of loose fitting between the water supply line and the fixture. This can be fixed by tightening the fitting.

As you see from above, it’s very important to know the reasons of leakage. If the flooring is changed of the bathroom, the traps shall also be changed. Usually there’s no leakage problem seen if CPVC pipes are used for water supply and drainage system.

About the Author:

Hi! This is Nitin, founder of ContractorBhai.com. We provide Affordable 3D Interior Design Service


  1. Rakesh Gupta 25 July 2015 at 7:36 am - Reply

    Very relevant information for owners of flats.

  2. Mohan 19 September 2015 at 1:30 pm - Reply

    There is a seepage from sidewall of toilet. Water is dripping continuously from top of window.can anyone investigate and fix?


  3. liz 10 November 2015 at 12:41 pm - Reply

    It will be nice if the article is supported with images ( of ‘vata’ ,p and s trap etc ) so that the readers can understand better.

  4. Nilesh Taras 14 March 2018 at 8:45 am - Reply

    Leakage from bathroom to below floor wall.
    Need injection solution for the same.

    • raj dave 22 May 2018 at 10:26 pm - Reply

      hi! i am having water stains on my kitchen ceiling and i can even see water drops which look fresh.. can injection help in this?

  5. balaraman 29 April 2018 at 1:21 pm - Reply

    I live in chennai and in a flat and there is one floor abouve us. in the bathroom the water is leaking i approached the top floor man ahe is not cooperative. can i stop the eak from my bathroom.balaraman

    • contractorbhai 4 May 2018 at 9:14 am - Reply

      unless you fix source of leakage it will be difficult to solve problem. Lot of people do wall tiling, this stops water to come through, but then water will find some other way & come out from different room/wall.

  6. Mohd mukeem 9 August 2018 at 6:15 am - Reply

    I sad water lekag on upper floor khudda of wc pipe and nahani trap.when tile fixing on floor these time toilet is ok but this when customer is come in socity seepage continuesly in toilet.
    Please help me.

    • contractorbhai 13 August 2018 at 11:03 am - Reply

      sir, you will need to check with your plumber/contractor. Water leakage problems are very tricky to solve.

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