Innovation, efficiency and quality - This claim, which is based on close cooperation with the customer, has evolvedGrundmeier KG (GKG) into one of the leading providers of window construction accessories since 1986.

Many years of experience in the area of ​​door thresholds are the basis for the development and implementation of the zero threshold - as a standard solution!

Our floor-level door threshold system combines efficient processing with the high requirements for watertightness and safety. The possibilities are diverse and include internal or external opening front doors, balcony doors with tilt and turn fittings and French doors. The system can be used w ...