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What is double glazing?

Quite simply double glazing refers to the use of two panes of glass in a window, often filled with a gas such as argon between the panes to add as an insulator. The reason so many people choose double glazed windows is that it can make such a big difference to their home in terms of reducing heat loss and energy bills.

How does it work?

Double glazing works by creating an insulating layer between the outside and inside of your home. Our double glazed windows are filled with Argon glass which is extremely good at reducing the transfer of heat.

Here is a simple explanation for you. It’s like an environmentally friendly jam sandwich! In A-rated Safestyle double glazed windows, the ‘bread’ is two types of energy efficient glass (Pilkington Optifloat™ and Pilkington K glass™), designed to control the flow of heat through the window so that your home stays warmer. The ‘jam’ is a cushion of air in our windows a special inert gas (found naturally in our atmosphere) called Argon. “Inert” means that it is safe and non-reactive – that’s why Argon is known as the lazy gas. Argon really does nothing and that’s what makes it so great for double glazing . It drastically reduces the mobility of heat moving through it. This means that heat stays in your home for longer.

Why choose double glazing vs triple glazing?

Much of the energy saving benefit is made in the jump from single glazed windows to A-rated double glazing. Whilst there are incremental savings to be made from double glazing to triple glazing it is often in our experience not offset by the additional cost triple glazing has.

Our recommendation to our customers is that double glazing strikes the best balance between cost and savings. We would only recommend triple glazing for a few cases such as living close to a very busy road where there are advantages to their sound reduction.

Differences in double glazing

Not all double glazing is equal when it comes to cutting the heat loss from your home. An energy efficiency rating system is applied to all double glazing products to measure how effective they are at reducing heat loss. Some standard double glazing windows may for example start at a C rating and offer some level of protection. However our  Eco Diamond windows are A-rated. As such they are actively recommended by the Energy Saving Trust for their excellent energy efficiency properties.

You can find out about Energy Saving ratings here


What are A-rated windows, and window ratings explained?

Windows are not all equal when it comes to energy saving, in fact far from it! Fortunately there is an easy way to determine how energy efficient a window is and it’s called the Window Energy Rating or WER for short.

Who calculates the Window Energy Rating?

The WER is calculated by an organisation call the BFRC (British Fenestration Rating Council), they are responsible for making sure a window is correctly classified from A+ to G, with A+ being the highest rating and G being the lowest rating. They calculate it based on the following properties of a window:

  • Heat loss (the 'U' value): how much heat your window transfers
  • Air leakage (the 'L' factor): how penetrable they are to the air
  • Solar gain (the 'G' value): how much they maximise the heat from the sun

What does it mean when choosing your windows?

If maintaining a comfortable temperature in your home and saving a few hundred pounds a year on heating bills is important to you then you should probably consider choosing a window that has an A-rating so you’re getting the maximum benefit.

10 year guarantee

Our 10 Year, Insurance Backed Guarantee!

At Safestyle we take manufacturing quality products seriously, so much so all our doors and windows come with an extensive, easily transferable 10 year guarantee. 

We guarantee to repair and replace any faults in your doors and windows for 10 years and as the nation’s largest fitter of doors and windows with over 20 years experience we’ll be around in another 10 years to fulfill that promise. 

What our customers think about their Safestyle Windows

  • Thanks to the team that fit my new double glazing, it is very pleasing.
    Mrs Coombes
  • We were extremely happy with the fitters.

    They arrived on time and were very hardworking and friendly.

    We would recommend Safestyle to anyone looking to get new windows / doors.

    The quality of the products supplied were also excellent.

    Very good value for money.
    Miss Winston
  • Excellent all round service from sales to fitting. I cannot give enough praise to your fitters.

    They arrived at 8am and left at 3.30pm-4pm.
    They left my property immacculate.
    They worked well as a team- I was amazed at the rate of progresss. They were also polite and considerate.

    The windows make such a difference - excellent - well done - very impressed - well worth the money!
    Mrs Walker
  • The whole team, from start to finish, provided us with excellent information on products. They were friendly and helpful. The install team worked hard and the final finish was good. Very happy to recommend safestyle tp anyone.
    Mr Russell
  • Compared to our old windows these are brilliant. The fitters came in and fit 8 windows in 1 day, which I thought was pretty amazing. We live next to a school and when the windows are shut we can't hear a thing.
    Mr ASTON

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