or polyester material and laminated and bonded thereto is a resilient cushion 36 of polyurehane foam or other similar carpet underpad material similar anchor sheet units 32 a and 32 b are placed on the floor in abutting relation and the units may be joined together by a pressure sensitive adhesive hooked tape 38 overlying the seams of the anchor sheets or by plain single sided pressure sensitive tape additional hooked tape 40 is added to the perimeter of the anchor sheet installation to provide for a regular perimeter and seam installation as shown in u s pat no 4 922 659 it would be convenient if the tape covering joins 41 line up with carpet seams but if they do not additional tape can be installed on the anchor sheet 32 to provide for at least seam coverage of course if plain tape is used then hooked tape will normally have to be installed at the carpet seams such tape is normally covered prior to installation full coverage could also be provided either by adding more hooked tape or by providing anchor sheet 32 with a flexible sheet pre manufactured with a complete hook covering in fig7 a is shown an additional similar form of arrangement which combines a hooked tape 42 to be described later at the perimeter of the room.