Condensation forms when warm air is cooled to a point where it releases the held moisture vapour which then condenses on the glass forming, what can be, significant amounts of water.

Where the window has only single glazing, the cool temperature on the outside transfers easily to the inside and condensation occurs rapidly.

With double glazing, the thermal insulation between the outside and inside is greatly improved resulting in a significant reduction in condensation, creating a warmer, drier, healthier home.

Say your home has a common humidity level of 70%, and the air temperature inside your home is 20^oC.  The outside temperature would need to drop to the values noted below for the temperature at the centre of the double glazing to be cool enough to reach the inside dewpoint (the temperature at which air is cool enough to release moisture):

Single Glass                                  8°C

Standard double glazing              4°C

SuperTherm™ double glazing        -6°C

The level of condensation at the edge of the double glazing, and on the window frame, will be influenced by the material of the frame e.g., timber window frames are excellent insulators.

Choosing SuperTherm™ double glazing retrofitted in a home that has reasonable management of fresh air ventilation, could eliminate condensation from the windows.

Where the frames are made of aluminium (that is not thermally enhanced) it is likely that there will continue to be a level of condensation occurring on the frames. This level will be influenced by the management of inside humidity levels and will be more noticeable in very cold temperatures.

Reduce the impact of condensation in your home by choosing our high-performing double glazing with SuperTherm Warm^™ Low E glass with argon.