https://www.pilkington.com/en-gb/uk/householders/glass-applications/windowsWindows. Glass can enhance your windows in more ways than you might imagine. Our wide range of glass can be used in various ways in an IGU (insulating glass unit) to help achieve improved window performance, as well as aesthetic enhancement to any style of home. Replacing or installing new windows provides the opportunity for you to enhance your home not only in terms of appearance, but in terms of energy performance and comfort, improved noise insulation, improved security, and even lower ...