Pro-Plast is a Białystok-based company specializing in the sale and installation of windows and doors. With more than 20 years of experience, it serves customers across the Podlaskie region, offering solutions in PVC and aluminium. Its range includes PVC windows, aluminium joinery, roof windows, PVC doors, and exterior and interior doors. Customers can also choose from parapets, blinds, mosquito screens, roller shutters, and garage doors.

Pro-Plast provides a complete service, from a free on-site measurement and tailored quotation to transport and professional installation. The company says its estimates have no hidden costs, and customers can spread purchases into instalments. Its window options include models with six-chamber profiles and triple-glazed units, with published Uw values varying by product. The installation team measures, advises on suitable options, fits the products, and explains their operation. Pro-Plast is located on Świętego Rocha Street in Białystok and offers consultations by phone or at its office. The company also advertises a five-year product warranty.