Matrix for floor and wall coverings

Claim 1

IN A STRUCTURE OF PLURAL SUPERIMPOSED LAYERS FORMED OF HARDENABLE PLASTIC MATERIALS AND RIGIDLY SECURED TOGETHER TO PREVENT CRACKING, CRAZING AND PEELING, AN IMPROVED MATRIX COMPRISING: A PLURALITY OF INTERSECTING GRID MEMBERS OF SYNTHETIC PLASTIC MATERIAL JOINED TOGETHER TO FORM CLOSED MATRIX SEGMENTS AND ADAPTED TO RETAIN COATING MATERIAL THEREBETWEEN, EACH OF SAID GRID MEMBERS HAVING WALLS TAPERING TO FORM A DIVERGING SPACE THEREBETWEEN FROM TOP TO BOTTOM THEREOF AND TERMINATING IN A NARROW EDGE AT SAID BOTTOM, SAID EDGE BEING INTEGRALLY CONNECTED TO A LOWER OUTWARDLY FLARED PORTION, SAID LOWER PORTION OF EACH OF SAID GRID MEMBERS BEING EMBEDDED IN A HARDENED SUBSURFACE MATERIAL, SAID LOWER FLARED PORTION BEING OF A THICKNESS SUBSTANTIALLY EXCEEDING THE THICKNESS OF SAID EDGE, AND AN OUTER FINISH COAT MATERIAL APPLIED OVER SAID SUB-SURFACE MATERIAL, WHEREBY SAID-SUBSURFACE AND OUTER FINISH COAT MATERIALS ARE RIGIDLY SECURED TOGETHER BY SAID TAPERED GRID MEMBERS AND SAID FLARED END PORTION.