We work with a lot of REALTORS who represent buyers and this is one of their most common questions. Many consumers believe that because vinyl windows tend to look similar, they are all equal in quality, but they are not. Two key ingredients to a quality window are the efficiency and the strength of the window. Just because a house has windows that go up and down, tilt out for easy cleaning and are double pane doesn’t mean the windows are efficient. Nor does it mean they are structurally strong and will continue to perform down the road. Read more