REHAU is a leading German supplier of profile systems for windows, doors, facades and winter gardens. REHAU’s profile systems are of high- quality, energy efficient, exclusive designs and innovative production technologies.

ARKA TM is an authorized partner of REHAU and uses its original products.

REYNAERS Aluminum is a leading European specialist in developing and marketing of innovative and sustainable solutions in aluminum for windows, doors, curtain walls, sliding systems & sun screens. In addition to offering an extensive range of standard solutions, the company also develops solutions that are tailored to any individual customer or project.

ALUPROF S.A. is one of Europe’s leading manufacturers of aluminum systems for the construction industry. Their range includes window, door and façade systems and systems for roller shutters and gates, as well as steel systems. Their experienced team of designers constantly introduces quality new concepts and products.

GlasTrosch – is one of Europe’s leaders in the manufacturing and processing of flat glass. The company operates in three specialized areas – Exterior (products for the glazing of windows, facades and roofs); interior (glazing solutions for residential houses, offices) and Automotive – (glazing of cars, trucks, buses, trains and airplanes).

Austrian fittings MACO is known for its practicality and reliability, designed for windows and doors of different opening types (turn, tilt, tilt and turn) and various geometrical shapes (rectangular, arched, segmented, trapezoidal, triangular).

The SIEGENIA GROUP offers a wide range of products which add value to windows and doors. With its TITAN, ALU and PORTAL product groups, together with the AERO and DRIVE ones, the company is one of the world’s leading suppliers of hardware, ventilation and building technology. In addition to that, KFV provides a complete range of modern locking systems for doors. This comprehensive group of products is completed with the SIEGENIA-AUBI Sicherheits-Service GmbH, which offers products and services for intruder protection and window repairs.The

– After more than 100 years of success, Gretsch­-Unitas is one of the leading suppliers of window and door tech­no­logy, automatic entrance sys­tems and building manage­ment sys­tems. G-U supplies an unrivalled selec­tion of pro­ducts ranging from window hard­ware for single-family homes through to complex building manage­ment sys­tems.