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Glam Journal

Should windows steam up on the outside?

Author

Emily Wilson

Updated on March 10, 2026

Should windows steam up on the outside?

Condensation on the outside of new windows is normal. Condensation on the outside of new windows does not mean they are faulty. It is simply the windows doing their job of keeping your home more energy efficient.

Why are my house windows fogging up on the outside?

Exterior condensation on windows occurs when the temperature inside the home falls well below that outside, like on a hot humid day. When dramatic differences in interior and exterior temperatures and humidity levels occur, moisture condensation can build up on the coldest surface—the glass.

How do you stop condensation on outside windows?

To combat exterior condensation, open window coverings at night to warm up exterior glass. You can also trim shrubbery near windows or doors as this will help promote air circulation. Raising the temperature setting on your air conditioner may also help keep your window glass at a warmer temperature.

Why do double glazed windows fog up on the outside?

Why does condensation form on the outside of new double glazing? The reason water condenses on the outside surface of the glass is the temperature of the glass drops below the external dew point temperature.

Is condensation on outside of windows OK?

It is not unusual to have condensation on the outside of new energy efficient windows; in fact, it’s perfectly normal. It may seem like a strange phenomenon, but once you understand what’s going on it makes total sense! Condensation forms on an object when that objects surface temperature goes below the dew point.

How do you stop condensation on the outside of windows?

If you are experiencing this type of ‘external condensation’ the only real way to get rid of it is to take a towel to your external windows. Or, when the sun rises and heats the outer pane of glass, condensation will tend to evaporate.

Why do my double glazed windows mist up outside?

External window condensation Condensation on the outside of your windows is normal, and is actually an indicator that your double glazing is highly energy efficient, keeping the warm air in your home and preventing the temperature dropping to the same conditions that are causing condensation to occur outside.

How do you soak up condensation on windows?

Ways to Absorb and Stop Condensation on Windows Overnight

  1. Open the window.
  2. Turn on the air conditioning.
  3. Turn on fans.
  4. Open your drapes and curtains.
  5. Move your plants.
  6. Close the door.
  7. Try a window condensation absorber.
  8. Use a moisture eliminator.

Why is there condensation on the outside of double glazed windows?

Why does condensation form on the outside of new double glazing? The warmer the air, the more water vapour it can hold – but it can only hold so much, so if this saturated air encounters a surface that is below the dew point temperature then it will condense.

Why do you get condensation on the outside of double glazed windows?

Why do my windows steam up overnight?

Condensation on the inside of your windows. This happens especially in the morning when the temperature outside is low overnight. It clears as the temperature warms up as the day goes on. This is caused by the humidity in your home, not because of the windows. Changes inside the home can make a difference too.

How do I stop condensation on my outside windows overnight?

Why do my windows get steamed up in the mornings?

Here’s why our windows get steamed up in the mornings and what you can do about it… What causes condensation on windows? Condensation on windows is caused by conflicting temperatures. It occurs when hot and humid air comes into contact with a cold surface (like a window)

Why is condensation forming on the outside of my new windows?

As mentioned at the beginning of this article, condensation forming on the outside of your new windows is actually an indication that your new windows are performing very well, although we appreciate it is not ideal! What can I do about the condensation forming on the outside of my new double glazing?

Why does it get So Cold Inside my Windows?

Because of the extreme difference in temperature, condensation on windows is more likely to form. If you only have single-glazed windows, your window panes will likely get very cold, but condensation also forms on double-glazed windows too.

Why are my windows foggy in the winter?

Window panes are therefore liable to become pretty cold, especially if they’re only single-glazed. This big difference in temperature is the reason that windows become especially foggy in the winter.