Window manufacturers

Dutch multinational corporation

Oknoplast is a Polish multinational company established in 1994 in Kraków that manufactures PVC windows, window components, doors, aluminium products and roller shutters. Currently based in Ochmanów with their enterprise zone near Kraków. Facilities of Oknoplast consist of 32 000 m2 manufacturing area, offices, warehousing and storage facilities.

thumb|250px|Jeld-Wen in Kuopio, Finland JELD-WEN is an American company with its headquarters in Charlotte, North Carolina. The company operates more than 120 manufacturing facilities in 19 countries. JELD-WEN designs, produces and distributes interior and exterior doors, wood, vinyl and aluminum windows, wall systems, shower enclosures, closet systems and other components used in the new construction, as well as repair and remodel of residential homes and non-residential buildings.