EN9
double glazing SE19 is the reason why these windows
Double Glazing Near Me have two panes of glass,
window glass replacement repairmywindowsanddoors.co.uk rather than the
EN9 traditional single pane. A layer of gas, [[
https://www.repairmywindowsanddoors.co.uk/nazeing-windowrepair/ EN9]] generally argon,
DA8 or
EN9 air is between the two panes and SE1 behaves like an insulator.