The system is designed for making exterior building elements that require thermal insulation. Constructions made in the PT52 system are classified in the RMG 2.1 material group.The system creates the possibility of using a variety of solutions when making various types of windows, doors and spatial structures. The thermal breaks used, straight and omega-shaped, ensure proper drainage of the structure. The depth of the sections, for frames and sashes, is 52-60 mm.