help needed!

2 years back, I found the water discharge pipe in my house was leaking, causing water to flow out from my ground floor (refer picture for clarity). A lot of water came out especially during raining days. To solve this issue without hacking my wall (the discharge pipe was concealed in the wall), I closed the airwell top with roof tiles to prevent water dropping into my airwell.

Problem came....the airflow in my house seems obstructed, especially during raining season and nobody at home. This problem intensified as my neighbor (my house is double storey terrace house) switched on the aircon most of the time, causing our shared wall to be cold all the time. The humidity built up in the house to cause mould.

Now, I would like to install a turbine ventilator on rooftop (the part where I closed the airwell). As seen in the picture, do you all think the turbine ventilator can suck out the hot air/humid air? Will the turbine ventilator (properly installed) have any leaking as I do not want any water drops onto my airwell slab and eventually cause the leaking at ground floor through discharge pipe.

thanks in advanced.

Install well, it should not cause any leak. Get 2 to 3 company to quote as usual lo.. But will it solve your mold issue for the shared wall, that will be a tough question. It will certainly improve air ventilation though

The mold problem due to shared wall arises when the humid air air could not escape from the house. I noticed the sweating of wall stops when I open all the windows in the house to improve ventilation.

Hmm, which floor do you find it worst?
I also have same issue as you. The house is very humid if no people around. Use the humidity sensor, the humidity level is close to 80% for the lower floor. And the dehumidifier (the highest spec available for house) can be full within one hour.

Unless you can build a ventilator duct from lower floor to upper floor then to well, else it might not be very effective to relies on the well/ventilator.

For me, I have goes for expensive route by installing Tuma brand ventilator. But my house condition is not as bad as your such that wall is 'sweating'
https://www.tuma.com.my/product.php?cls=3&id=15

At least I no longer relies on the dehumidifer so save on electricity bill but pay high upfront cost.

Mine is the upper floor common room. I do not think I can afford the Tuma brand ventilator....too costly for me.

My house humidity is in the range between 70-80%...Is it considered normal at this period? I am living at east coast and now is raining season.

Yup, which I "kind" of feel that the price is on high end, feel like they should be better option since it really just look like a nicer version of the kitchen wall ventilator floor.

[Maybe something you can consider if you dont mind either ur window or wall got the wall fan look】

Hmm, maybe can compare the humidity in between your outdoor and indoor to see whether the difference are big? Since my case is I validate during the sunny day and the humidity between outdoor and indoor is quite far apart.

Just curious, does switching on fan help in improving the situation? Like using the standing fan or circulation fan.
If can, could be a cheap fix for now till waiting for the sunny season comes where you can see whether the issue is seasonal issue or permanent and decided whether worth for you to do a roof ventilator etc.

This post has been edited by yuen300: Jan 4 2024, 10:22 PM

Just share my experience with you on your humid house. You may check if there is any pipe leakage.

Few years back, before I sealed off my airwell, I found my downstair room and store room were extremely humid. Anything put inside will grow mold and putting activated carbon also grew mold. Then only I realized thatwas due to my leaked discharge pipe from airwell connected to store room and downstairs room.

Since then, I sealed off the airwell to completely put my airwell discharge pipe dry....the humidity at ground floor lowered....but it led to trapped humid air at upstairs due to blocked airwell.

Just share my experience with you on your humid house. You may check if there is any pipe leakage.

Few years back, before I sealed off my airwell, I found my downstair room and store room were extremely humid. Anything put inside will grow mold and putting activated carbon also grew mold. Then only I realized thatwas due to my leaked discharge pipe from airwell connected to store room and downstairs room.

Since then, I sealed off the airwell to completely put my airwell discharge pipe dry....the humidity at ground floor lowered....but it led to trapped humid air at upstairs due to blocked airwell.