Sternfenster has introduced a new line of uPVC tilt-turn windows manufactured using profile systems from Deceuninck, the Belgian profile system supplier. The partnership marks Sternfenster's move into the competitive uPVC window segment, where established players like VEKA, Rehau and Schüco dominate the market. The new windows are now available for ordering, though production start dates have not been announced. Sternfenster has not disclosed technical specifications or pricing details for the range.