UNI is a target system patio backing with a height of 12 mm for laying patio tiles directly onto the waterproofing (cardboard, PVC membrane, EPDM, etc.). Background target UNI has the option of alignment in the plane between the substrate and the substrate and between the substrate and terrazzo tile. Additional feature is the balancing wedges, which can achieve ideal levels decking. The shape of the underlying target UNI module allows a 5-fold increase in the height of pads. The construction of pads UNI achieves uniform widths. Patio underlying targets UNI are intended for use with a gutter profile R80, whose shape provides support for the floor layers along the edge of the floor with a full unobstructed drainage insulating layer. Profile has an additional overflow openings that allow drainage from the insulation in case of clogging of basic drainage holes.