you need a more even coverage of the heating mat with not so large gaps inbetween - otherwise as above - you will definately feel the cold bits and play hopskotch



heres mine bathroom install










and the kitchen install

heatnig mat laid on the leveleled floor



then covered in another layer of self levelling compound


then when thats gone off - tiled on top...



all done..( not the clearest pic as it was a pic of the new cooker