As far as the shop and the tiler are concerned they both have responsibilities to you.
See
http://www.consumerconnect.ie/eng/Le..._Law/Shopping/ for a guide to YOUR rights.
Tell them that you will be taking them to the Small Claims Court and they will soon buck up and redress the fault.
http://www.citizensinformation.ie/ca...court?tab=more
I did this with a supplier one time. His carpet layer burst a pipe just as he was laying the last strip of a wooden floor and I had to call out an emergency plumber costing me a fortune. When I went to the shop he told me I would have to cover the cost of the plumber (they were my pipes that were TOO CLOSE TO THE SURFACE and that's why his guy burst them!!!!).
I contacted my insurance company who said that if pushed they would cover the cost but that they would be taking the supplier to court to recover the cost. I went to the supplier and said I would cover the cost of the plumber if I had to but that I had supplied my insurance company with his details and they would be taking him to court. He instantly took the cost of the plumber off my bill!!
The fortunate thing there was that I had not paid for the whole floor before it was laid and it was quite a large well known store in the town.
Hope that helps. Good luck
mrsl