Both styles of windows in Glasgow will serve the same vital purpose – reducing both heat loss and noise pollution. However, they differ in style and installation method. Double Glazing has a pocket of insulated air in the middle of the two panes of glass and are installed as a complete unit. Secondary glazing, however, is installed by adding the second pane of glass, or alternatively a plastic panel, to a single-glazed window on the interior side. This panel creates a gap filled with air between the original pane and the new one. Of the two formats of glazing, it’s widely accepted by double glazing companies in Glasgow and beyond that double glazing is more effective than secondary glazing. The reason for this is that the insulating gas is more than just air, it’s often argon or krypton, which is far more effective and protects against energy loss. On top of that, it comes together as a professionally constructed unit, meaning it is ensured to have a tight seal made up to industry standards. That being said, secondary glazing does have an advantage in that it’s less intrusive, meaning that it’s far more likely to be accepted in listed buildings, or other areas that have similar protections.