Hi there.
We are also in 27 (No 5 duplex) We were there last week and and no sign of damp. However our problem was a thick layer of dust from the use of an angle grinder to chamfer off the marble steps to the stair case - so you can imagine??? and also no heat and believe me days are good but nights were very cold, I had to buy a camping gaz heater and electric oil filled to stay warm.
I was talking to the guy in charge of snagging (they now have an office in one of the Duplex of block 26 - very useful, he now knows me pretty well. He sais the problem to the duplex behing me was due to the irrigation seeping through the wall. The sprinklers are now turned off.