Order new window frames in the same way as you can order new cabinet doors for your kitchen.
If you are considering changing windows, you should bear in mind that you have a cost for the window itself and an, in many cases equally large, cost for taking out the old and putting in the new window
Replace the window frame
Now you have the opportunity to easily upgrade your windows by simply replacing the sash itself. Here you can now choose different types of glass, extra insulating, sound dampening, old glass types or completely modern. You also have the opportunity to change the appearance of your house through different spray divisions.
This concept is best suited to more modern windows (60s onwards) as these frames can sometimes be of a slightly lower quality, while the frames are still perfectly fine.