Just about to put down a conservatory laminate floor over a new chipboard floor which in turn sits on insulation over an old concrete floor. The UFH mat is made up of wires 3mm thick. The mat will cover about 70% of the floor. I am concerned the laminate will be resting over hard spots created by the UFH mat and wonder what is the best underlay to use. Too thin and the mat will create hard spots, too thick and I guess the laminate could deform under point loads (sofa feet for example). Alternatively I could put the heating mat under the chipboard but it wont then give a fast warm floor which is what I wanted. Any advice?