Go back
Windows, Doors & Conservatories

How Do Double Glazed Windows Work?

How do Double Glazed Windows work

Double glazing is a wise investment for any property in the UK, especially with our unpredictable weather conditions!

Double glazed windows will save you money on your energy bills across the year and add value to your overall property. But on the face of it, they look pretty much the same as standard, singularly-glazed windows.

So how do double glazed windows work? What makes double glazed windows so popular and energy efficient?

Well take a single pane of glass as an example. This provides poor insulation because glass is a great conductor of heat. It will absorb the temperature from your home and transfer it outside and vice versa. By installing another pane of glass behind it, you trap a thin layer of air between both panes. Fresh air is not such a great conductor of heat and therefore, much less heat is lost through your window.

Let’s take a look at how it works in more detail…

How Do Double Glazed Windows Work?

As mentioned above, double-glazing is a window that consists of two panes of glass separated by a trapped layer of air. This air or ‘gas’ is usually argon – a chemical element with an atomic number 18.

Argon is completely safe and has around 65% of the thermal conductivity of air, meaning it is extremely bad at conducting heat. This keeps warm air locked inside your home and helps to improve your property’s overall energy efficiency.

The second pane of glass also acts as a subordinate noise barrier, keeping your property acoustically sound and quiet from the outside. Double glazed windows also provide added strength and security.

double glazed windows work

 

Thermal transmittance measures how much heat escapes through your double glazed windows. The solar factor calculates how much energy is gained in your property from sunlight entering through your window

Windows Energy Rating (WER)

Now you know the answer to the question – how do double glazed windows work? Next, it’s important to know what to look out for when purchasing a set of double glazed windows!

When you purchase a new set of double glazed windows you can judge the level of energy efficiency by looking out for the Windows Energy Rating (WER). This system works in a very similar way to energy ratings on electrical appliances. Ratings start from A++ and go all the way down to G.

In order to comply with building regulations, all windows must have at least a C-rating.

WER is calculated using several values and inputs, including:

  • Thermal Transmittance (U value)
  • Solar factor (G value)
  • Air Leakage (L value)

Thermal transmittance measures how much heat escapes through your double glazed windows. The solar factor calculates how much energy is gained in your property from sunlight entering through your window. Lastly, the L value determines how much air leaks through your double glazing.

All of these factors are measured in kilowatt hours for every square meter, per year.

double glazed windows work

Upgrade your windows to the most energy efficient models on the market...and benefit from a refreshing reduction in your energy bills!

Benefits of Double Glazed Windows

First and foremost, double glazed windows are designed to reduce heat loss from homes and commercial buildings, allowing you to reduce your energy consumption and lower your associated bills. This could save your home or business a lot of money across the calendar year.

Other benefits to installing a set of double glazed windows include:

  • Warmer in the winter and cooler in the summer
  • Do your bit for the environment by lowering your energy usage
  • Reduces condensation which is extremely important
  • Reduces noise pollution from outside
  • Enhances your property’s resale value
  • Increases security and aesthetic appeal
Ready to take the next step? Talk to our team of glazing experts today by calling 0800 1700 636, or, alternatively, by simply clicking the button below!