Hi and thanks for your comments. The problem we have got is that the kitchen is sat on top of the chipboard and ripping this out would mean taking the kitchen out too. I am thinking that maybe we should take the tiles up and put laminate flooring down but I am not sure this would work either...
We have just built a first floor extension on to the side of the house which is attached to our existing kitchen. We had laid wet under floor heating in between the joist and covered this with 22mm kaber chipboard which was screwed down in lots of places (apologies for lack of techinical...