Double Glazing Window Repairs If your double glazing windows are damaged, you need to have them repaired as soon as possible. If the seals are broken it can cause draughts and condensation, which can make your home less energy efficient. Repairing double glazing is typically less expensive than replacing it. http://www.stes.tyc.edu.tw/xoops/modules/profile/userinfo.php?uid=1218286