CondensationWindow condensation is an interesting phenomenon, one which homeowners have questioned for years. You may have noticed it on your windows in the morning, especially now we’re entering the colder part of the year. In answer to the question is condensation on windows normal, it is important to make a distinction between condensation on the interior of a double glazed window and between the two panes of glass.

Why do my windows have condensation on the inside?

If condensation has formed on the inside of your window, this is perfectly normal. In fact, this is a sign that your windows are working properly. Double glazing reduces the amount of heat transmittance from one side of the glass to the other. When it does this, however, it creates a significant temperature difference from one side of the glass to the other. Condensation forms when warm air meets a cold surface, meaning the warm air inside your home is meeting the cold surface of the glass. This type of condensation is more common in winter because the difference in temperature between the inside and outside of your home is increased. Therefore, conditions for its formation are ideal.

How can I stop condensation forming?

Whilst condensation is a sign your windows are working properly, excessive moisture can cause mould to grow around your window frames. However, taking a few important steps can prevent damage and prolong window life, such as:
Condensation on a window

  • Opening windows for at least 20 minutes a day, but preferably for longer.
  • Using an extractor fan when cooking, showering or bathing. These tasks are notorious for creating excess moisture in the home.
  • Make sure to dry your washing outside. If this isn’t an option, however, dry it in a ventilated area.
  • If condensation persists, purchasing a dehumidifier can reduce humidity levels.

Why do my windows have condensation between the panes?

A double glazed window with condensation between the two panes of glass is a sign that the window is failing. Modern double glazed windows are fitted with seals that protect the interior of the window from air and moisture ingress. If condensation has formed on the inside, this indicates the seal has broken and moisture has managed to seep in. The more window condensation there is, the bigger the break in the seal.

Do windows with condensation on the inside need replacing?

T&K recommends that any windows experiencing window condensation between the panes should be replaced. Failing double glazed windows will still retain more heat than a single glazed window. Although, the extra loss of heat means heating your home will require more energy. Any window installation from us comes with a 10-year guarantee, meaning you’ll be covered in the unlikely event of a failed window seal.

T&K Home Improvements are leading home-improvement specialists based in Wellingborough with over 40 years’ experience. For more information on our products and services, call us free on 0800 622 716. Alternatively, contact us online or check out our website.