I am doing a small installation of lock and fold flooring and find that the pieces don't want to sit flat, they curve up from the floor somewhat. I am tempted to push harder on them, but don't want to break the tongue off. Should I be using a rubber mallet to set the pieces together or is that too heavy handed for this stuff, it isn't very thick and it was expensive so I really want to be careful.
Does anyone have any tips for installing this type of flooring? It is turning out to be a little more hassle than they advertised on the display in the store.