For me 廳-Bathroom 一向都 OK. But ensuite one got a problem. Therefore it can only be 開小用 if not 試過一地濕晒....
Of course I reported to Defect Office they sent 2 guys after few weeks they used 1 roll of tissue dump in toilet & spend 1/2 days BUT the conclusion is sometimes OK sometimes not. They said is the design problem nothing they can do.... :evil: