When double glazing is noted for its insulation properties, secondary glazing can offer equivalent amounts of Electricity performance and sounds reduction. Double-glazing works by trapping air or inert gas amongst two panes of glass — building an insulating barrier. Professionals: no

The windows on their own are saving us loads of heat and look a lot better than some really old aluminium framed ones we had Formerly. In actual fact They're so superior readers You should not even observe we have set them in. These are surprisingly easy to put in and took me minutes to acquire