Hollow porcelain tiles.

[White Room]

I've looked at all the posts and hav'nt seen my question or perhaps missed something, what size are the tiles and what type are they....

 

[UnhappyCustomer]

I've looked at all the posts and hav'nt seen my question or perhaps missed something, what size are the tiles and what type are they....

These. http://www.viewceramiche.com/prodotti/cotswolds/serie_cotswolds.htm mixture of all four sizes.

 

[UnhappyCustomer]

Ok, place the palm of your hand on the floor and chap the tiles with your other hand, can you feel a small vibration? If so then it sounds to me like the tiles have not bonded to the floor. In this case I'd start some exploratory work and get a tile lifted to see what's going on.

Checking again today theres deffinately a vibration.