How to demist Double Glazing

Demisting double glazing

Demisting double glazing is possible. However, once the unit has been drilled, the Argon gas filling inside the unit has leaked out, this will render the units thermal barrier capabilities useless.

Once the gas is removed from the double glazed unit, it will make the transfer of heat from inside the home to outside the house with less resistance.

Misted Double Glazing

Demisting a double glazed unit sounds like a good idea on paper, but in reality, it will potentially lead to increased energy bills and increased heat wastage from within the home.

The proper way to deal with demisting a double glazed window is to replace the unit altogether with a new argon gas unit, Planitherm makes some of the most energy-efficient glass available in the UK.

By replacing your old glass units, you could make substantial savings on energy bills; they claim up to 25% can be saved by replacing the glass alone.

You may also notice considerable reductions in outside noise, their comfort plus glass can reduce noise by up to 20%.

After paying a good amount of money for your new windows you expect them to last, and generally, they do but in the odd case they mist within a short space of time after installation it may be worth calling the installer to check what warranties & guarantees you have.

Demisting the glass without replacing 

If you do want to demist the glass without replacing it, you need to follow the steps outlined in the video, but as we said using this method will not only lose energy efficiency but also will not last very long at all.

Unless you fix the original problem that caused the unit to mist the same thing will likely occur in the not too distant future, and you will be back to square one.

What causes double glazed units to mist?

The misting of units is usually caused by one of two problems:

  1. The glass-unit was not sufficiently packed, and the drainage holes in the frame may have been blocked, causing water to sit in the channel.
  2. A manufacturing default may have caused the break down of the seal, and the moisture was allowed to enter between the pains of glass.