I have renovated my home 9 months ago with laminated flooring for all my bedrooms. I hacked the tiles and laid with concrete 1st because the tiles were popping up.
When the renovation was being done, I suspected that the concrete was not completely dry since they laid the lamination tiles on the concrete the next day after the concrete was done. The contractor (AriseCreation) denied that it was still wet and said that it should not cause any problems. A few days after that, the lamination tile edges started to pop upwards. The contractor came and losen the tiles saying that it should be better after a while.
I did not gave much thought to it but after a few weeks, small lumps started to pop up near the toilet area regardless of how careful I was not to wet the floor in any way. I eventually fell sick and the sickness got more and more serious one after another. I did not relate it to the floor then.
9 months later, my aircon leaked and water sipped throught the lamination tiles. I decided to redo the whole floor since there are so many problems from it. To my greatest shock, I saw lumps of mold grown underneath the lamination tiles near the toilet area! The smell was terrible. After removing half some of the tiles from my master bedroom, I realised that the concrete floor was actually still wet!
The worse thing was that the mold grew all the way underneath my built-in wardrobes and I had to tear down all of them as well! Imagine how much $$ I wasted and how much more I need to spent!
So readers out there, please make sure the floor is very dry with your own eyes before the lamination is laid! And invest in a dehumidifier to prevent mold from growing. The best is don't use those lamination tiles with paper core.
Take care.