Put down 2007 when the house was built then adjoining room around 2011, I honestly can't remember the second date exactly. I'm probably on a hiding to nothing but it's worth a try - have a crack from one side of the kitchen to the other, approx 4 mts. Had a surveyor check it out and it's nothing sinister just slight movement of the concrete raft under. Damned annoying because if I can't replace it means uplift and new lay of 60 odd metres!