S 42UD enables accessible, large-area sliding elements for more comfortable living. Level thresholds to access patios, balconies, and conservatories offer safety and freedom of movement. Threshold solutions meet the legal accessibility requirements through incorporation into the building in the correct manner. To implement accessible thresholds in the area of sliding elements while offering protection from moisture damage indoors, particular measures need to be taken. One possible solution is to use our drainage system for the S 42UD sliding system. This system solution enables effortless integration of structures in new buildings as well as renovations.