Using thermal insulation such as Expanded or rigid Extruded Polystyrene sheets below the levelling screed will dramatically impact the thermal resistance you are aiming to achieve for your flooring. In addition to that, it has the feature of limiting the transmission of sound too. Considering the green building approach by many constructors, it is an ideal solution to move environmentally friendly forward.

Due to its high compressive strength and low compression, it is chosen by many constructors to include the insulation prior to the installation of the screed.

The minimum Screed thickness above the insulation shall be 65 mm for domestic flooring and 75 mm for commercial use.