And the point

Wooden windows are attached to the base with special fasteners (these are screws and dowels designed for these types of work). Pay attention to this moment: windows, fixed only with the help of nails and mounting foam — a sign of unprofessionalism of installers. And the point is not even that after some inconvenience may appear and wind repairs will be needed. No, everything is much more serious, such a window is simply unsafe, because it is very poorly fixed.