For solid floors, a liquid screed or concrete mix is the preferred application for underfloor heating. Applied over an insulation layer, the screed is an excellent conductor of heat and acts as a heat diffuser. The Hep2o staples system offers complete flexibility and is a cost effective solution for screeded floors. UnderfloorHeatingSystems Hep2OUnderfloorHeating&Cooling, Hep2OUnderfloorHeatingandCooling,