Patent ID: 8857123

Claim:
A foam insulation backing board, comprising: a front face, a rear face, a bottom face, and a top face, a first side face, and a second side face; wherein the front face has at least one alignment rib positioned longitudinally across the front face and running from the first side face to the second side face, and extending from the front face; the alignment rib comprising a bottom face, a sloped top face, and a front edge, wherein the bottom face and the sloped top face meet at the front edge; and wherein the rear face has at least one recess positioned longitudinally across the rear face, wherein the recess in the rear face and the alignment rib are complementary in shape and are positioned opposite and parallel to each other at the same level; wherein the bottom face of each alignment rib is perpendicular to the front face of the foam insulation backing board.