How come some companies remove the frame completely?
For a while, many companies were removing the frames completely and installing replacement windows. The problem with this is that instead of sealing to the old window frame, the replacement is sealed to the outside exterior of the home. Since stucco and other sidings are not completely waterproof, this creates many problems as far as sealing the window and preventing leaks. Because of this we do not recommend removing the old frames when using a replacement window. If the dealer or contractor you are dealing with even suggests using this method, look to somebody else.
