this wall is shared with neighbor at the back, some sorta clustered landed property.



Does anyone know what's the reason of it? usually early morning Cold air/water seep out of shared wall
also, know any contractor that capable to fix it, need they help to explain/prove also also when i file claim for defect from developer, under 3-y warranty.
Current developer-assigned sub-con+ architect said it observed as this wall is cool, but not an defect.
was told neighbor open air-cond too long, which i dun beliv, there's no way to fix it
now it's starting to grow mold

What is above that wall ?

longkang, no water pipe/duct (according to architect), usually only rainning, water will flow thru it
it's open area, that put a big tangki at the center.

Is it possible to access the tangi area to take some photos?

have to wait weekend, usually when dawn go out, sun falls only back.
may i know what's ur thought on this?

previously developer had assigned his kaki, to repaint the longkang with water-proof paint. no use
this longkang seldom expose, thus it's not clogged.
even sunny day, or rainy days all same

Cannot comment much without seeing some photos.

what i worry is: the neighbor did something like this (hack the wall just to seal the air-cond pipe, which i have no prove):
https://forum.lowyat.net/topic/3053199/all

If the leak starts from the ceiling area, then is unlikely the AC. The installation of the AC wont be so high.

Since your photo is 'incomplete' is difficult to see the overall leaking.

it's not from ceiling area, there's around 10cm from ceiling area, then only start seeping water/air.
just that i am not that tall enuf to take the full picture

This post has been edited by garygan: Mar 17 2022, 10:36 PM

If it only have water in the early morning, then yes, it was due to the air conditioning. The cold surface of the wall + low dew point temperature in the morning causes the water to condensate.

The similar occurrence can be observed at your car windscreen. Early morning you will see the water droplets form on the windscreen.

Condensation happens only when these 2 conditions are present ( must be together, any one of the condition absent, it will not happen).

1) Cold surface below dew point temperature.

2) Present of external air / fresh air with high humidity (our country easily 75-90% during morning)

In order to eliminate this condensation, you need to eliminate either one of above. If this wall is at external, eliminating 2) will be impossible. You will be left with control of item 1).

On item 1), setting of air condition temperature setting on your neighbor side is beyond your control, hence you can only control it from your side. What are the possible solutions ?

a) Install AC outdoor near to this wall, let the heat rejection of the AC outdoor increases the wall temperature surface when it is running. You must run this AC frequently.

b) Apply a layer of insulation to the wall. The insulation will prevent the wall become to cold thus eliminating the condition 1).

It is the way your neighbor run their AC ( probably direct blowing of cold air to this wall surface, not a defect from the developer.

If you think is the AC, seek your neighbour cooperation not to use for 1 week and observe if the leaking stop. Otherwise you have everyone pushing the problem away.

All leaking water in the wall is cold .... not only for AC water.

This post has been edited by mini orchard: Mar 17 2022, 11:02 PM

my question is:
i lived at condo for quite long, even my home-town, is landed, linked house.
why it never happen before?
does it mean:
1) my neighbor open it with ultra-long, ultra-low temperature that caused it？
2）could it be the pipe they sealed (if they did) has leakage?


this (a) the developer did suggest.

This post has been edited by garygan: Mar 17 2022, 10:58 PM