Have you or the real estate agent contacted the owner? If I was the owner I would not be happy if there was an outstanding issue affecting a property I owned.
If your door doesn't shut properly it would be a security issue. If it were me, I would write not only stating the water/moisture/mould and possible damage to property (and health) but also I would want to know who to hold accountable should my place be broken into because of a broken door.