PremiPlan Plus - The premium threshold system for maximum barrier freedom with a high degree of accessibility, for ground level installation at zero millimetres This threshold system also builds on the standard threshold. By using special additional parts and a bed profile of structural material, the threshold is installed at ground level of zero millimetres on the inside and outside. The EVALON-coated connection angles and stainless steel connection plates, specially designed for the system, allow professional connection of the flexible waterproofing sheets and installation of the water channels. A parallel retractable floor seal is the main component of the multistage and continuous sealing concept which achieves maximum results by means of specially developed structured parts. The modular design of the system allows efficient manufacturing and installation.