The use of total plastic windows is determined by several reasons. First you need to report that the plastic windows began to be made for a long time, but only in the last twenty years they really gained great popularity due to their amazing external and technical properties. It is difficult to say why the plastic began to be used so widely, because the wood in some aspects of use is better than any plastic, but thanks to the creation of complex metal -plastic structures, it was possible to really quickly create conditions for more comfortable conditions in any room.