The most running is currently translucent structures based on a profile of metal -plastic and aluminum. PVC windows and doors managed to prove themselves as products with optimal thermal insulation properties. Windows and doors based on metal -plastic due to the features of their design reliably protect the room from both winter colds and from summer heat. This condition is due to several factors at once. Firstly, the air chambers that are equipped with windows and PVC doors naturally prevent a change in the internal temperature of the house or apartment under the influence of external temperature conditions. Secondly, additional protective elements of double-glazed windows provide a high level of tightness, reliably protecting the room not only from cold or hot air, but also from drafts, blowing and other adverse natural factors. Thirdly, the advanced configuration capabilities allow you to equip window and door blocks from PVC with an optimal set of accessories to ensure the necessary ventilation conditions, air circulation in the room, as well as protective functions-modern plastic windows can protect against unauthorized penetration into the premises and special complex systems for Children’s rooms. A special advantage of doors and windows made of polyvinyl chloride is their durability. With proper installation and operation, they can last more than a dozen years. Lobnya windows