It’s not normally achievable to mend the glass — it may normally be replaced with no really need to change the full frame. This process, known as reglazing, can restore the window’s insulation Houses. Double-glazing is effective by trapping air or inert gasoline between two panes of glass — https://fire-resistant-materials32086.bloguerosa.com/33568942/an-unbiased-view-of-acoustic-secondary-glazing