In addition to different types of window and door systems, Penglas Yapi LTD is also active in wall materials, among which are rockwool, glass wool, EPS and polyurethane filled sandwich panels. Having the certain know-how concerning the construction and assembling of sandwich panels on walls, Penglas Yapi colleagues and workers are also experienced in the selling producers and transactions of the materials. The panels it provides are completely of European origin and certificated under European standards. The raw materials and spare materials can be specially designed in accordance with customers needs; colours, materials and sizes. All types in international market are available for wall and roof adjustments. The accessories and raw materials can also be provided.