A common cause of drafty windows is improper installation. If this is the case, you usually can correct the defects without removing or replacing the window. Perimeter air leakage can be prevented by proper caulking and flashing. In case of where the installation changes or racks the window frame so the sash weatherstrip cannot seal the sash to the frame, however, you may have to get rid of the window to proper the issue. Is the air coming in at the joint between the sash and the frame or at the joint involving the frame and the house? You will find out by holding a lighter or lit candle in front of each joint on a windy day and slowly move it along the joint. The joint is probably leaking if the flame flickers strongly or goes out. Whilst performing this test, be certain to stay clear of your windowpane treatments so that they do not catch on fire.
In the event the window unit installation is the situation, you will need to work with your builder or with a contractor. There may be a defect in the window design or construction if the window has been installed degree, plumb Holzfenster and square and is also not twisted or racked, but there is a leak between the frame and the sash. The air might not be seapage but simply cold room air flowing down the window surface if your window is not efficient in your climate and particularly if it does not have protected glazing. The window surface becomes colder and then cools the room air next to it. The cooled down room air sinks in the direction of the floor and is replaced by warmer room air, which in turn is then cooled. The answer in this case is to replace the windowpane with an energy successful window.
If the windowpane construction is the problem, you will also need to work with the builder or contractor as well since the window maker. The nature of the window specifications and your negotiating skills will be major factors in your ability to get satisfaction. Naturally you should get what you specified and paid for; however , you will have to work out if your specification was vague or nonexistent.