My new house has not OTA antenna presently, but I was thinking of adding one. My local market to the South seems to line up well for one of my upstairs attic windows. The attic has a finished floor and tall ceilings and it would be an ideal spot to put the antenna and not have it detract from the architecture at all. It's a standard dual pane window. How much if any signal loss would occur through something like that if the antenna was right at the window?