Ohh no... I saw some mold looking and so I climb up a ladder and started touching it, OMG I poke a hole in my plaster ceiling. Now there is a hole.
Aparently, the previous owner did the design in a way that my 1st Floor master room aircond piping went below and accross the house. Its concele. Last 4 weeks ago, in midnight, my room aircond started dripping water. And guess what..... the effect is as per the pictures.
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How to know it is completely dry????????????