Heating bills reduced with secondary glazing is very possible. This is basically an added layer of frame fitted within the windows own frame.The amount of insulation received is determined by the amount of space between the two layers. A bigger space means more insulation than a smaller space.
When you have you window secondary glazed, it can only be opened from the inside. This works in your favor, as you are able to keep burglars and other criminals out. So you can refer to this procedure a
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