A professional can handle double-glazed window repairs by replacing the glass, glazier's points (those little triangular metal pieces that keep the glass in place) as well as repairing or replacing the sash. You can do this type of repair at home. If you aren't sure about doing the work yourself, https://repairdoubleglazedwindows20484.blogunok.com/11373109/simple-ways-to-keep-your-sanity-while-you-double-glazed-repairs