Thank you for all of your welcome notes. I was surfing looking for technical spec on tile fixing, I have the usual problem I have been tiling for years and had no problems with customers then this time last year I was busy so I sub-contracted a kitchen floor, the tiler done a good job with the tiles but didn't clean them properly so I had to go back to finish off properly, now the client wants to take me to court, what fun!! Does anyone know where to find the details I need?