WP-CHARISMA 3-STRIP. 3 Layer Parquet. Intelligent patented double-click system with the greatest interlocking power on the market. Patented press-stud principle for simultaneous locking of the longitudinal and header joints in one movement. Fast and simple one man assembly and disassembly. Can be completely adhered to the subfloor. Ideally suited for installation over underfloor heating. Header joint edge locking mechanism made from solid hardwood only. Spruce supporting material with vertically arranged growth rings. Hydrostop - unique all round joint edge impregnation provides the ultimate protection against the ingress of moisture due to small spillages.