The cost of double glazing is an important factor for many homeowners when considering the use of this technology. Double glazing involves installing two panes of glass in a window, separated by an air gap to improve insulation and reduce heat loss from within the home. The cost of such installations can vary significantly depending on multiple factors, including type of material used, size and complexity of installation, as well as any additional features requested. When selecting materials for double glazing, there are several options available. UPVC frames are typically one of the most affordable, while timber or metal frames may be more expensive but provide greater longevity. There will also be differences based on the quality and thickness of glass used; thicker glass generally provides better soundproofing and increased energy efficiency. Installation costs will depend on the number and size of windows being replaced, as well as access difficulties which could add time to complete the job. Additional features such as self-cleaning or solar control glass can increase initial costs even further; however these often include warranties that guarantee their performance over a longer period than standard products do. Ultimately, it is possible to find double glazed solutions that fit all budgets if research is done before making a purchase decision – with some estimates putting average costs between £400–£800 per window installed.