So as to maintain the effectiveness and usability of MARLEX products and prevent damage to persons and property we recommend proper care and maintenance. MARLEX windows are designed to withstand loads in apartment construction. MARLEX windows are our own product manufactured in Croatia, which combine special assembly technology, fulfil special static requirements and meet all of the installation requirements for public buildings, as well as special rules and regulations for installation. This ensures security and continuous high quality with top standard for years to come. It gives our customers the guarantee that what they get is real MARLEX quality and that the use of our products adds permanent value to construction and living conditions.