What is a double glazing

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Double glazing is simply a layering of two glass sheets on top of each other. This radically improves glass properties, most notably resistance. With windows this is rarely used, much more use double glasses at the door to a balcony or in one of the rooms. Double or triple glazing is also popular in pergolas where it works mainly as a roofing, but can also form a wind barrier to
of the sides of the structure.