For flat, plastered surfaces, as well as for extruded polystyrene, the adhesive is applied to the entire surface of the polystyrene sheet by means of a 10-12 mm chipper. For surfaces with planar differences, the adhesive is applied to the polystyrene surface in approximately equally spaced points at 15-20 cm and on the perimeter edge with a 3 to 4 cm wide cord.