It is a process of placing two glasses adjacently leaving a space (usually between 12 to 16mm) and filled with either argon or any other non-reactive gas.
For property owners who are agitated due to excessive consumption of electricity can install double-glazed windows.
The gas in the space between the glaciers prevents excess heat dissipation, eventually preventing you from switching on your heaters during winters (lowers carbon emission); furthermore, by installing double glazing windows, the valuation of your property increases noticeably.
The majority of UK households have adopted double-glazed windows because of its ability to reduce the loss of heat as well as being capable of lowering the level of noise pollution.
Considering all the benefits double-glazed windows are worth the money.