When it comes to adding value and charm to a home, few investments yield comparable results to repairing window sash. Sash windows are beautiful, functional windows characterized by their traditional British design that allows both the top and bottom panes to slide up and down within the frame. Not only are traditional wooden sash windows an attractive architectural feature often seen in historic and vintage homes, but restoring and maintaining them also provides significant benefits that can noticeably enhance a home’s overall market value.