Floor Mat Covers Question About Installing The Latricrete Floor Warming Mat?

Question about Installing the Latricrete Floor Warming Mat? - floor mat covers

I install carpet on the floor warming Latricrete Cement Backer Board over a substrate of plywood. Any general tips for installing carpet? Would it not make better use of self-leveling compound or thin-set to cover the mat? Each proposal will receive a flat floor, where the carpet is installed (toilet, 4 "away from the wall, etc.) or other investment tips from others?