It may necessarily mean 2 times as much work when cleaning, especially when double and triple glazing can also characteristic self-cleansing glass. On the other hand, Most recent secondary glazing panels are detachable and the weight of a single glazed panel is much lighter to deal with when doing this. https://johnnycrcmy.blogthisbiz.com/41628064/how-much-you-need-to-expect-you-ll-pay-for-a-good-secondary-glazing-london