Nowadays, polyvinyl chloride profiles are quite reliable, durable and ergonomic materials. They have a very large level of wear resistance. Of course, there is no limit to perfection, but now it is possible to say with complete confidence that major repairs and plastic windows cannot be identical in any way. When using window structures of this type, you will only have to adjust the fittings, replace some details and conduct cosmetic cleaning. In addition, you may have to install some additional components. We are talking about blinds or mosquito grid. Despite the quality and durability of plastic windows, there are times when their work is not perfect. Among them, the following can be distinguished: