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Condensation and Cold Spots explained

Posted: January 14, 2020

As the temperature drops outside and the dark nights draw in, we tend to retreat into our homes to keep warm and cosy

If you have external condensation on your windows, it proves they are working. It might be a nuisance to have the water vapour restricting your view, but you can be happy that your glazing is doing exactly what it should and keeping the cold air out and keeping the warm air inside your home. It shows that your windows are energy efficient, and that’s great news.

Internal condensation

However, internal condensation on windows is not a good sign. There are several things that can cause internal condensation. The first things to check are lifestyle factors. Cooking, drying wet clothes and steam from bathrooms can all cause internal condensation. More ventilation – either passive through window vents and air bricks or active through electric extractor fans – could be the answer. This type of condensation will show up more while you’re cooking or drying clothes.

But if you’re getting internal condensation that’s worse in the morning, it could be that your windows need changing because the outside pane of glass isn’t protecting the internal pane from the cold. This means that any moisture in the air is precipitating on the internal pane and causing condensation. In very bad cases, this may drip down the window and puddle on window cills.

Untreated internal condensation

Always wipe away any moisture from windows as left untreated it can create black mould. Look at upgrading to modern, energy efficient windows. We have a big selection of windows, in a range of styles and designs to suit all properties. We offer both double and triple glazed units to give the best thermal performance, and for properties where windows cannot be changed because of their heritage, we offer a secondary glazing solution.

Cold Spots

If you’re feeling a chill, but there’s no condensation, it might be that your home has cold spots. The easy way to tell is to put your hand approximately 30cm away from the window. Move it round and if you feel a drop in the temperature, then it’s a good indication you have cold spots.

For maximum comfort, you want even temperatures. It’s also more efficient for heating bills. Cold spots make draughts and it’s these chills that make us feel colder. We put the thermostat up or add an extra log on the fire to try to maintain the temperature.

Modern window technology, both in the frames and glass, reduce this to a minimum, but older windows can let more heat escape and send heating bills up.

Like condensation, cold spots can be drastically reduced by installing new windows. Sidey offers A energy rated windows, that’s the highest you can get, in a huge range of styles. Our teams of highly trained installers fit them. We are one of the only installation companies in the UK to have the BS 8213- 4:2016 certification. This is for the survey and installation of windows and doors and includes design considerations and updated regulatory requirements for fire, thermal design and installation.

Find out more about our energy efficient range of windows and doors.