Do I need to install a thermal insulation under the heating mat?

A thermal insulation is required on the base of the floor that was not installed during construction. When the floor heating is installed on the second or other levels above in a residential house, then thermal insulation is not needed.

Thermal insulation is needed under the CATE-80 aluminium foil heating mat when using a dry installation with laminate and parquet flooring. It is necessary to install a thin fiber or polyurethane thermal insulation, which will perform as thermal and acoustic insulation.