Greetings.

Few months back, the unit below claimed there is water seepage along the wall in their bathroom. The other side of the wall faces the outside.
So I did the water proofing for my unit. After turning off running water for 1 month and my unit is currently unoccupied, the MO technician found that the wall is still wet.
According to the MO, they turned off the running water into the unit below's bathroom (apparently running water pipes run across the ceiling), but after 3 days, the wall still wet.

Anyone encountered this before in a high rise, and what other possible cause or method to find the leak?

Better to show some photos of your unit as example and indicate the leak area.

It was the sign that there was continuous water source present. If continuous water source present, highly likely it is due to be water leakage from the piping. You may need to get the As-Built drawing on how the cold water pipes were installed from the O&M. MO should have the copy of the O&M from the developer. From there you can narrow down the location of the possible leak.

Almost same problem as my unit...
Living room the wall got water damage,
The technician come and say maybe the pipe inside the wall burst .....
Until now no future respond...

I could say for sure that's the pipe inside the wall leak, unfortunately

I think there is no running pipe in ceiling concrete. Piping is always along the wall. The point that wet the most most likely the location. Not sure how the layout looks like but turning off the water to the bathroom will not stop the leak before the valve. Probably it is not even your problem but I have no idea on the house layout.

This post has been edited by Zot: Feb 28 2022, 08:32 AM

Lower unit refer to upper unit flooring piping as running across the ceiling.

Thanks all for the comments. Is there any professional tools available to detect the source of water? Coz I'm tired of the unit below not taking action, and do not want future hiccups for the tenant should the unit be rented out (i.e disturb the tenant for checking, etc).

There is none.

The leak definitely comes from the top and is either from your unit or external wall.

There is nothing the owner of the below unit can do except to complaint.

Unless you have some photos as mentioned earlier, there is nothing much to comment further

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