The layers under a tile install
Every tile install is a stack of layers, and each layer has a job. The substrate has to be flat and firm. Backer board has to be fastened to spec. In wet areas, a waterproofing membrane has to cover the backer and turn into any drain or fixture penetration. Thinset has to be the right size for the tile format. Only then does the tile go on. We follow that stack because it is what keeps water out of the framing and keeps the tile bonded for the long haul.
This is the layer where cheap installs save money and where callbacks come from a few years later. We do not save money there, because it is the money that decides how long the finished job lasts.


