It had been really worthwhile to put in them mainly because I could really feel the chilly air get squeezed out because they went flush from the single pane of glass. Solid good quality and excellent suit. Secondary glazing movie may not be as efficient for household insulation as glazing https://rylanlbmzk.qodsblog.com/26463449/the-5-second-trick-for-mayfair-secondary-glazing-solutions