hi all, i went to look at a job today only to find the customer has sheeted the floor with chipboard and all the shower walls with chipboard,,as far as im aware i shouldnt be tiling onto this ,,although after i said this to him he said the shop he bought it from told him it was fine for water areas and he also done a bathroom up stairs in the house 10 years ago with chipboard and the tiles are fine....is there a chipboard out there thats suitable to tile onto i dont know about????