Stephen Johnson
Good Evening Graeme, Given the house is only 12 years old it is unlikely that the problem is anything other than incorrect fitting. It is very important that the correct fixing adhesive and procedure is used where ceramic times are laid over a wooden floor. Not following correct procedure will result in cracks appearing between tiles. ie, insufficient adhesive under the tiles and/or not using flexible adhesive which moves with the natural movement of the wooden floor. I hope this helps Regards Steve
