Secondary double glazing is usually a term that commonly refers to the whole process of adding a second window to an existing window. a, U and R values for one-pane window retrofitted with SiCellA of varying thickness over a a hundred μm-thick supportive substrate attached to a glass pane (inset https://outdoorlightingfixtures12209.bcbloggers.com/26196339/fascination-about-noise-reduction-windows-in-fulham