If you’re considering getting double glazing for your home, there’s lots of things you have to think about. One of those things is the type of glass that goes into your double-glazing window panes.

There are 8 main types of glass you have to choose from. In this article, we’re going to look at annealed glass, sometimes known as float glass.

What are the pros and cons? How is it made? And should this be the type of glass you choose to spend money on for your home?


Introduction to annealed glass

Essentially, annealed glass is the first “version” of glass after it’s been produced through something called the float process. Each of the other seven types of glass you can use in your double-glazing starts off as annealed glass.


What are the most important things to know about annealed glass?

Just because it’s the least expensive, you don’t have to worry about its appearance. Only someone incredibly knowledgeable and well-trained in double-glazing could tell on site if your panes are made from annealed glass. It looks just as good as any other glass selection you can make.


How much does annealed glass cost?

Annealed glass is generally the least expensive option on the market making it ideal for customers wanting to operate within a tighter budget.


How breakable is annealed glass?

All double-glazing glass is difficult to break. That’s because of the way that it’s manufactured.

The average pane of annealed glass can take up to 6,000psi of pressure. Put another way, that’s the weight of around 5 Mini Coopers all concentrated into one square inch. Now, that’s strong.

And that’s not all. Think of the two panes of glass you have in your double-glazed window. What’s between them is (normally) argon – it’s a type of air that’s heavier than that the air we breathe normally.

The argon gas acts like a shock absorber so if someone throws something at your double-glazed window, the argon pushes back against what’s hit the window giving them much greater strength. Because argon is so heavy, it also gives you great insulation and sound-proofing.

Annealed glass also has a consistent strength throughout. There are no weak points in it and many installers feel safe putting it into their own homes because annealed glass can withstand localised stress points much better than even tempered glass.

On the rare occasions when annealed glass does break, it shatters into large, jagged shards which can cause cuts and injuries.


Any more important information on annealed glass?

Compared with the types of glass that go through further treatments after production, annealed glass is remarkably flexible lending itself to far more design possibilities for your home than other types of pane.