Double Glazing / Glass

Double glazing consist of two panes of glass with a gap in between, usually about 16mm, to create an insulating barrier that keeps heat in.

This is filled with gas, and has many benefits over single glazing. According to the Energy Saving Trust, if you were to replace all of the windows in a three-bedroom, semi-detached house, going from single-glazed windows to double glazing, you’d save between £75 and £110 per year, depending on the window energy rating.

Old double glazed units generally have a U value rating of 3 or above, our modern high performance double glazed units have a U value rating of 1.2, this is 3 times the performance compared to an old unit. Meaning the window is more efficient at keeping the cold out and the warm in.