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Take the inside sash out of the window frame. Once the inside stops are gone, the lower sash should slip out easily. If your existing window is old, the inside sash might be connected to a weight by a chain or cord. If necessary, cut the chain or cord and let the weight fall down...
[7] Then check along the sash for any leftover glass, and pull or scrape it out before moving on. If there isn’t a spot to grab the pane, then try going to the other side of the window and pushing it out. Even though you taped the glass, some shards might still break free ...