I have a living room 14' x 22' that has a concrete subfloor and some of the perimeter of the floor also has a 1/4" seem or more where the floor meets the footing. I currently have a 12mm thick laminate floor installed over it with thermofloor radiant heat pads beneath the laminate. This floor has been a nightmare from hell for me. Before putting the laminate down i had to use 4 bags of self leveling compound and also cut out a 3' x 5' section of concrete which was either a high spot from the pour or had pushed up over time. There are no major cracks in the floor.
The concrete, however, is still uneven to the point that i have spongy feeling spots in the laminate floor. I am not happy with this at all and am considering pulling up the laminate and putting down tile. My two questions are:
If i put tile down will i be able to level it it out with thinset as i am putting the tiles down?
What do i do about the space between the floor and the footing? In some areas the two edges are even and in other they are not even.