If your windows have formed holes there are numerous ways to seal them up. First, you must measure the width of the hole. Make sure the hole is big enough to fit a thin, long object through. This can be accomplished with a coathanger. Cover the hole with silicone. To http://double-glazed-windows-rep32193.blogzet.com/how-to-double-glaze-window-repair-to-boost-your-business-25079891