Why are my windows misted?

Facilitating the entry of warming natural light, effective ventilation, and heightening the appreciation of local views, imagine a home without misted windows – a soulless, characterless box; it just isn’t right, is it?! The best windows feature ‘less frame, more glass’ and keep cold air out and warm air in, which, in turn, helps to reduce rising energy costs.

Natural light provides a wide range of health benefits, so when windows mist up it can be incredibly perplexing. Just what exactly is making them mist up and how can it be prevented? Is it a good or bad sign?… Let’s figure this out together, once and for all!

Why are my windows misted?

Why are my misted windows?

Windows have a tendency to mist up in certain conditions due to the moisture content in the air. To pinpoint the exact reason why this is, begin by finding out whether your windows are single glazed or double glazed.

Why are single glazed windows misted?Why are my windows misted?

Misting on the inside and the outside of single glazing is caused by internal and external condensation, which occurs when warm, water-laden air deposits itself onto low temperature surfaces. Particularly noticeable throughout the colder months when we use our heating systems in the cooler hours, condensation is most prevalent in older homes with single glazing because they were not designed to deal with modern-day central heating or in properties that have been divided into smaller units. Old single glazing simply is not designed to retain heat in the same way that modern secondary, double, or triple glazing does. So, when it is cold on the outside, single-glazed windows will be cold on the inside and vice versa.

How do you stop condensation on single pane glass?

  • Regularly wipe down the area with a dry cloth
  • Wipe the glass with a diluted solution of water and vinegar or a small amount of washing-up liquid
  • Carefully use a hair dryer on the affected area (make sure there are no cracks in the window first!)
  • Dry clothes outside
  • Move houseplants
  • Buy a dehumidifier
  • Improve ventilation e.g. open windows and doors for at least 10 minutes each day
  • Improve insulation e.g. external wall insulation

Remember that these are only quick fixes and will not actually get rid of condensation issues – in some cases it could even create damp and mould in other areas of the property. If you are serious about eliminating harmful condensation from single glazed windows once and for all, it may be time to invest in modern secondary, double, or triple glazing.

Why are my windows misted?Why is double glazing misted?

If double glazing has surface condensation on the outside of the glass this is actually a positive sign – no, really, it is! A phenomenon experienced at night or in the early hours of the morning, it proves the glazing is working as it should do by preventing unnecessary heat loss. However, if double glazing is misting up in between the panes of glass, this should be cause for concern. An indication that the window seals have been compromised, the best way to rectify this is to repair or replace the window entirely. There are services that can remove the moist air and replace it with dry air. However, if a ‘blown’ double glazed window has gone beyond the repair stage, the only viable option is to replace the unit as soon as possible to reduce the impact of inefficient windows on energy bills and general comfort in the home.

Why does double glazing mist up on the inside?

Condensation on the inside of a double-glazed window can be attributed to your lifestyle. What we mean by this is that there is too much moisture in the air, caused by high humidity from everyday tasks such as cooking, showering, drying clothes, and even breathing!

How do you stop interior condensation on double glazing?

  • Reduce the number of cold surfaces by keeping your home at a constant, reasonably warm temperature
  • Regularly open kitchen and bathroom windows
  • Keep kitchen and bathroom doors closed when in use, to prevent moisture-rich air from circulating
  • Run hot and cold taps together to minimise steam
  • Use lids on saucepans
  • Install or update extractor fans in bathrooms and kitchens
  • Dry clothes outside or in the bathroom with the door shut and the window open
  • Make sure washing machines are correctly ventilated
  • Make sure tumble dryers are condensing machines or vented outside
  • Reduce or stop using portable gas and paraffin heaters
  • Cover up fish tanks
  • Buy a dehumidifier (even if it’s a new build, new plaster can retain moisture that can lead to condensation)

Lifestyle, climate, or performance – which one is causing your windows to mist up?

Now you understand the reason behind your misty windows, whether it’s just one window, replacing a tired conservatory space, or a complete overhaul, take control of the situation by comparing double glazing window quotes here. Or if you wish to discuss your options further, don’t hesitate to give our knowledgeable Customer support centre a call on 0800 084 5076.

So maybe you feel like replacing your windows is probably one of the main solutions for misted windows, but do you really need to replace your windows? Read our next article to find out more, click here.

Scroll to Top