Tile adhesive failure is often blamed on the adhesive itself. But in many installations, the real problem begins before the adhesive has even had a chance to perform properly. A technically suitable adhesive can still fail when the substrate is poorly prepared, the mixing is incorrect, the wrong trowel is used, the adhesive is allowed to skin over, or the tile is not properly bedded. Tile installation is a system. Tile + adhesive + substrate + application method + site condit