Fine Floor Fibre Boards form a shock and sound absorbent layer which also compensates for small uneveness, scratches or cracks on concrete and wooden sub floors. The Fibre Board panels also act as an excellent thermal insulation layer. Isopanel Fibre Boards prolong the life of wood and laminate floor coverings. The raw material used to produce Isopanel Fibre Board is 100% Poplar wood fibre with no additives and contains no harmful substances. Isopanel Fibre Boards can be placed directly onto floor boards where the maximum unevenness is 2mm and is not subject to humidity exceeding 3%. A DPM sheet must be used when installed with a concrete floor. Impact noise insulattion: 22db