Nature must be absorbed.
Alexander von Humboldt
Even more robust, even safer: The unprecedented wood thickness of the MASSIVA line makes it the powerhouse in the KATZBECK wooden window collection. Fittings with break-in resistance as a standard feature and the outstanding stability of the casements and frames impart a comforting sense of security in your own four walls.
Best value, thermal insulation:
concealed and visible tilt & turn hardware and visible rotary hinges (doors)
spruce, larch, oak
Best value, sound insulation:
Rw 45 (-1;-5) dB
according to the KATZBECK colour collection or customer design
classic wooden windows in a sophisticated, durable design