Up above a main door.

 

Apparently there's an aircon unit up there above the outside wall.

 

Whatcha reckon, water damage from the aircon?

 

 

Besides getting the problem sorted, a bit of a clean up and replaster?

Cut the old board away in a neat square then leave to air and dry for a week or more. Place new boards in nice and tidy then just tape and joint it, if you take your time with the jointing there will be very little sanding if any before painting

Outside ceilings just use cement board, if the cement patch is not too big you can buy premix exterior filler and build it up in layers

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Interesting, thanks.

 

Apparently the aircon unit doesn't have a pipe that drains the water, they hoped it would evaporate. :D

 

I guess that wasn't the case haha

 

Task A once you've opened up the ceiling is, of course, to sort the source of the water.

 

Then proceed as per post #2.

Unless you have them fix the drain on the aircon that is upstairs, I would not do anything other than sit back and enjoy a cold one because anything that you do will be futile!