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How to stop condensation on windows

Condensation is a common damp problem, which occurs when warm air comes into contact with cold surfaces (like glass) or when there’s too much humidity. The good news is it’s usually very cheap, easy and quick to fix. What’s more, you’ll probably be able to fix the problem yourself, without the need for professional help.

Here we’ve shared our top tips on how to stop condensation on windows…

How to prevent window condensation

Improve the ventilation of your home

One of the best ways to prevent condensation on windows is to increase ventilation. Remembering to open your windows when you’re at home is the simplest solution to stop condensation on windows and may even fix the problem altogether.

If you are looking for a more long-term solution for misty windows, you could consider installing air bricks into your external walls or air vents in your internal walls, both of which will allow for a better flow of air throughout your property. Another option is to install vents in the tops of your window frames. Keep in mind that all of these options could allow heat to escape your home easier and therefore could hurt its efficiency.

Adjust your heating

A sudden increase or decrease in the temperature of your home can also contribute to a condensation problem. With this in mind, we’d suggest keeping your heating on a constant low heat to balance out the air temperature and prevent the frequent switch between hot and cold.

However, you will need to consider the costs of running your boiler constantly and identify the impact this may have on your energy bills. If concerned, speak to your energy provider and get their advice.

Draw out the moisture

Condensation is caused by excess moisture and is, therefore, more likely to occur on the windows in your bathroom and kitchen when you’re showering or cooking. If you’re wondering how to stop condensation on windows in these rooms, we’d suggest installing an extractor fan. Sure, it’s not a ‘free’ option like opening up your windows, as you’ll have to pay for an extractor fan and its installation but it will prove very beneficial in the long run, in terms of clearing up your misty windows.

Often excess moisture and humidity in the home are caused by drying clothes indoors. The lack of good weather here in the UK means that drying clothes outdoors isn’t always an option and not everyone can afford to run a tumble dryer, making drying clothes on radiators inside often unavoidable. If this is something you have to do and it’s causing condensation, you may want to consider purchasing a dehumidifier.

A dehumidifier will draw moisture out of the air and stop condensation on windows throughout your home.

Improve insulation

Poorly insulated homes tend to have problems with condensation. Installing double glazed windows, along with adequate wall and loft insulation will help to reduce the amount of heat that is lost from your property. It will also help to keep the temperatures of surfaces in your home (like your glass window panes) from getting too cold, so water vapour in the air is less likely to condense on them.

Check your windows for a damaged seal

Condensation may appear on your double glazed windows if the sealant around the windows is damaged and letting water in. This is known as exterior condensation. Your double glazing seals could be damaged as a result of general wear and tear or the constant use of abrasive cleaning products.

Resealing double glazed windows is the answer. Whether you can do this yourself will depend on your level of skill. There are plenty of online tutorials (and even videos) to follow if you want to give it a go.

But truth be told, you’re probably better calling in a professional to do it for you.

You may find some window companies aren’t willing to reseal double glazing that they didn’t install themselves but some companies offer misty window fixer services. This involves inspecting your windows and advising on the best course of action. Sometimes they may be able to offer a moisture removal service for demisting double glazing. However, it’s often better value for money to have the affected window glass pane replaced and benefit from a new guarantee.

If you have failed double glazing and the windows are relatively new, it could be down to a faulty product or poor installation. Check to see if your windows are under warranty, as you should be able to make a claim. If they are under warranty, do not attempt any repair work yourself, as this could void your claim.

How to stop condensation on windows during the night

Do you wake up to misty windows every morning? It’s likely caused by excessive moisture in the room from you breathing. The vapour condenses on the cold glass panes and forms condensation.

To stop condensation on windows at night try keeping your bedroom door open to improve airflow and leaving your curtains open, or swapping for a thinner material.

If this doesn’t fix the problem, check the seals of the windows (as mentioned above) or consider running a dehumidifier at night to keep moisture at bay.

Removing condensation to prevent mould

The risk of leaving condensation on your windows is that it can quickly turn into mould and cause damage to your windows. It’s therefore really important to clear excess moisture from your windows as soon as possible. This can be done with a towel, tissue or squeegee.

You’ll likely have to clear your misty windows several times a day, depending on the severity of your damp problem. This will only reduce once you implement one of the solutions shared in this post. We’d suggest starting by opening your windows daily (since its the cheap and easy option) and if that doesn’t work, consider making changes to the windows, ventilation and insulation of your home.

A quick recap on how to stop condensation on windows:

  • Improve ventilation by opening up the windows
  • Consider running your heating on a constant low setting
  • Use an extractor fan or dehumidifier to draw out moisture
  • Improve insulation with double glazed windows and loft / wall insulation
  • Check your windows for failed double glazing and damaged seals
  • Keep doors and curtains open at night
  • Remove condensation from windows ASAP to prevent mould

We hope we’ve answered your questions on how to prevent moisture on windows and you’re able to fix the problem yourself with our handy tips.

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