Secondary glazing is different to double glazing because it contains a glass pane being additional to an previously current device, conserving dollars and effort. Having said that, If you would like a thing a lot more modern-day with a higher effectiveness then you can go with uPVC (unplasticised polyvinyl chloride). https://daltoncytnj.yomoblog.com/42492610/5-simple-techniques-for-sash-window-draught-proofing