If a double-glazed glass door or window gets ruined or even the seal fails, repair can be very high priced. From this, we can see that a double glazed window is all around two times as successful as secondary glazing, even so, these amounts are according to averages, and https://dantezxqjb.bleepblogs.com/35103523/not-known-details-about-fire-rated-secondary-glazing