During the installation of a plastic window, do not neglect the fastenings that go with it. If not all of them are used, then tightness and thermal insulation will deteriorate. For a flat installation of a plastic window, you need to use the level. Such a procedure protect the window from the inclination of the window, its arbitrary opening. To top it off to the work done, the window should be treated with building foam. The proper installation of the window is the guarantor of long -term and trouble -free operation.