This is a video on how to install replacement windows. Installing drop-in windows is an easy process you can do yourself, because it utilizes the original window frames. The replacement window is literally "dropped in" to the old frame and caulked in place. The first thing we have to do is remove the original sashes, jamb-liners and
storm windows. We're going to start with the outside. Run a razor blade along the edge of the storm window to break the paint seal. Then, use a screwdriver to remove all the screws from the storm window—you may have to scrape paint off the screws. Once all the screws are removed, you will be able to lift the storm window off the
house. We're going to use the razor blade again on the inside of the windows. First, we need to break the paint seal between the window frame and the side and top stops. The stops are thin pieces of wood holding the sash into the frame. These need to be saved, so don't break them. Pry them off carefully. We used two
pry bars to get in-between the frame and the stops. Work your way slowly up and down the length of the window. The stops are nailed in. Once you get the stop off, pull the remaining nails out of the frame. Remove the stops on both sides and then do...
See more here: https://www.youtube.com/watch?v=tnZ2K3F23yU