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.

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.

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.

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.