Compremum S.A. engages in the manufacture and sale of windows and doors in Europe. The company operates through Joinery, Construction Services, Development Services, Railway Industry, and Renewable Energy Sources segments. It offers wooden, wooden-aluminum, and aluminum windows; patio doors; wooden external and terrace doors; and facades offers under the SLONAWY brand. The company also provides construction services including construction of fiber-optic networks, water and sewage networks, housing, cubature facilities, and reconstruction of railway infrastructure; general contracting services; and assembly services, including replacement and installation of door and window joinery. In addition, it provides repair and modernization of passenger and freight cars, electric locomotives, and liquid fuel tanks; technical consultancy, and maintenance services for energy facilities. The company was formerly known as Pozbud T&R Spolka Akcyjna. Compremum S.A. was founded in 1973 and is based in Poznan, Poland.