Normally with mentioned structures double glazing can not switch the initial window design and specification (which is usually single glazed). In this article, secondary glazing units can provide outstanding results as a substitute. We are in a Victorian flat with large draughty sash windows. Our secondary glazing arrived at 7am https://elliottmdvoh.blogscribble.com/29688848/secondary-glazing-things-to-know-before-you-buy