Scotland
If you are searching for secondary glazing for sash windows you no doubt have some drafty sash windows that may well be covered in condensation and doing a poor job of cutting down noise from outside such as traffic and aeroplanes.
Secondary glazing can reduce noise by as much as 50% depending on the gap between the existing window and the new glazing, 50mm / 2 inches is the minimum recommended gap and 200mm / 8 inches is the maximum recommended gap.
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