This Area traps air, or possibly a special gas like argon, making a barrier that slows the transfer of heat and cold. The thermal insulation that double-glazed Home windows supply will make a difference in your Strength bill, but that is not the only rationale to think about them. https://customtiledesigninlondon38271.full-design.com/not-known-factual-statements-about-fire-rated-secondary-glazing-76990706