Direct dielectric heating using radio waves, i.e., electromagnetic waves in the high-frequency range, was successfully tested for the application in the field of building redevelopment. It could be shown that this method can be utilized to homogeneously and efficiently heat various materials such as sandstone and fibre concrete in a controlled manner. Final temperatures of more than 100 degrees C can be achieved. This allows drying of building materials without disturbance of the structure. By placing formed structures in a packed bed of an appropriate material, this method can also be applied for the preservation of cultural goods, for example for drying sculptures.