When making your choice in favor of wooden windows, it is necessary to make the main emphasis on the quality of the used wood. You can not use a wood core for a window frame, on which annual rings are perfectly visible. And also, there are knees and accumulations of resin. In the window of the window opening, the surface should be even and silky, without fluxes of varnish and paint. The stacking staff should be glued, and not fixed with nails. The fittings of the company should be on the fittings.