At the castle construction site, clay is primarily used for infilling timber framework. This building material is sourced from the nearby village of Töschling.

During processing, the clay is mixed with water so that it can then be stirred into a thick slurry—either by hand, by foot, or using a mixing device. The correct consistency for infill application is achieved when a ball with a diameter of 10 cm, dropped from hip height, deforms slightly on impact.

In lime burning, the upper part of the kiln, which is filled with limestone, is covered with a layer of clay during the firing process to prevent excessive heat loss.

In the future, clay roof tiles will also be fired. To make them, clay is placed in moulds or frames that are slightly larger than the finished tiles, to allow for the shrinkage expected during drying. The tiles are then left to dry for several months before being fired for several days at around 800–1000 °C.