Abstract: An apparatus wherein individual lock members include interconnecting right and left end walls, with spikes directed through the top and botttom wall for positioning and securement of the barriers to an underlying support or to one another. A fabric flap is mounted to a forward planar wall of each of the blocks for enhanced mounting of the blocks to an underlying surface to minimize cantilevering of the blocks in use. Further, positioning blocks are selectively securable to a top surface of each block and cooperative with rectangular recesses within opposed bottom surfaces of further blocks to provide vertical mounting of the blocks together.