General installation steps, FIRST the pedestals grid is laid out and pedestals are assembled and tuned to the correct heights using string lines and laser level. SECOND, the Hex-Tray and the hex-foam insulation are pre-assembled and held together with included plastic cork screw. THIRD, the Hex-Tray/Foam assembly is then placed on top of pedestals and after 3 unites are installed the hex-lock disk are inserted into the curf-cut corners of the 3 trays and the 4th tray/foam panel is installed. FOURTH, the aluminum heat transfer plate is installed on top of the Hex-Tray and can be cut back at wall terminations to expose the Hex-Tray U-bends to allow loop back of heating element. FIFTH, the heating cable or pex tubing is laid in the channels and run the full length of area to be heated and returned to a common electrical connection point or plumbing manifold. SIXTH, the heating cable can be connected to a control box with timer for manual activation or snow switch to activate heating when snow moisture is detected and the ambient temperature is below a selectable set point in the range. FINALLY, with paver lift-up tool the porcelain pavers are carefully installed on top of the assembly.