Misty, steamy, cloudy or foggy glass caused by condensation inside the double glazing unit means that you are losing up to 20% heat from your home!
Double glazing units have a hermetic seal to keep in usually an inert gas like argon or krypton, serving as a thermal break to regulate between outside and inside temperature. The gas serves a purpose to make your home or property energy efficient and for landlords, it will surpass the minimum energy performance rating on an EPC. A failure in the seal can cause the window to lose its insulating properties and allow moisture to enter the space between the panes to form condensation.