Blog>Expert Advice>Steel windows: Everything you need to know
Last updated: 27 September 2024
Steel windows: Everything you need to know
Steel windows are becoming more and more popular with homeowners around the UK. Here’s all you need to know.
Steel windows are strong, versatile, secure, and attractive, so it’s no wonder they’re becoming increasingly sought-after by homeowners!
Here's all you need to know about these metal frame windows – from the advantages and disadvantages to how much they cost.
What are steel windows?
Just so we're on the same page, steel windows are exactly what they sound like – metal frame windows made of steel.
These window frames are typically very slim, as steel is an extremely strong material.
In this way, steel windows have become synonymous with ‘Crittall’ windows, known for their thin, sleek lines and grid-like patterns.
However, it’s worth noting that not all steel windows are made entirely of steel. Rather, some consist of a steel-coated timber core.
What are the advantages of steel windows?
Steel windows have lots of advantages. There’s a reason they’re so popular with homeowners! Here are the main ones.
Strong
Steel is the strongest material for window frames. In fact, it’s around three times stronger than aluminium, which is a popular alternative to Crittall windows.
Secure
Thanks to their strength, steel windows are also the most secure window type.
Long-lasting
These windows are extremely durable. As long as they’re well-made and properly cared for, they can last over 50 years!
Low-maintenance
Steel windows are low-maintenance, unless you live in an area with high humidity or near the coast.
Excellent insulator
Steel is an excellent insulator. So, these windows are a fantastic option for energy efficiency.
Flexible
Steel windows are handmade and often made bespoke. This gives you a lot of flexibility on things like style and sizing.
Sustainable
These windows can be made from recycled materials. After all, steel is one of the most recycled materials in the world!
Attractive
Thanks to their slim frames, steel windows are slick, elegant and let in lots of natural light. They also have an industrial aesthetic, as they were originally found in Victorian industrial structures.
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What are the disadvantages of steel windows?
Like anything, these windows also have a few disadvantages.
Heavy
Steel windows can be very heavy – especially if they’re large in size. Not only can this make window fitting more difficult, but you may also notice their weight when opening and closing your windows.
Susceptible to corrosion
Steel can be susceptible to corrosion, especially if you live in an area of high humidity or by the sea. In this case, you’ll need to treat your windows and repaint them regularly to prevent them from rusting.
Labour-intensive to manufacture
These windows are handcrafted and labour-intensive to manufacture. This can mean long lead times.
Cost
Steel windows are more expensive than other window types. This can make them prohibitive to homeowners on a budget. Which brings us onto…
How much do steel windows cost?
Average steel window costs range from £1,200 - £2,500.
However, your total cost will vary depending on factors like the:
Style of window
Size of window
Window design
Colour
Glazing
Spec
Extras
Head over to our steel window cost guide to get a clearer picture.
Planning for your steel windows
As you can see, there are lots of decisions to make when you’re planning for your new windows.
Remember, these windows are often made bespoke, which means you’ll have the flexibility to make all kinds of decisions.
Here’s what you’ll need to consider.
Material
As we’ve touched upon already, not all steel windows are made completely of steel.
Rather, some consist of a steel-coated timber core.
Similarly, if you’re on a budget, you can achieve a similar look with aluminium Crittall-style windows – more on these later!
Style of window
Steel windows are available in lots of different styles – from casement windows to tilt and turn, sash windows and even bay windows.
Which you choose will impact your overall price.
As a general guide, casement windows tend to cost the least, while bay windows cost the most.
Size of window
Thanks to their strength, these windows can be very big.
However, bear in mind that the bigger your windows, the more expensive they’ll be.
Big windows also tend to be heavier, which can make installation more complex.
Window design
You’ll be able to make several choices about the design of your windows.
For instance, how many opening elements do you want your windows to have? And how thick do you want the glazing bars to be?
The glazing bars are what give your windows their industrial look, but they’re available in a range of different thicknesses.
Colour
Most steel windows are black, as this ties into their industrial history.
However, you can get them in pretty much any colour you want – including grey, white, or even blue!
Glazing
Don’t forget about the glass for your windows!
Most new steel windows nowadays will come double-glazed as standard.
But there’ll be lots of different upgrades available. For instance, you could opt for enhanced security glass, acoustic glass, higher insulation or even solar control glazing.
Extras
You’ll be able to choose from a range of specs and finishes on things like window handles, hinges and peg stays.
Depending on the project, you may also need – or want – to carry out additional work, such as replacing your window sills or adding curved heads above your windows.
Chat with your window fitter beforehand to make sure you’ve accounted for all the details.
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How do they compare to other metal frame windows?
Aluminium windows can be a great option for homeowners who want a cheaper alternative to Crittall windows.
Many companies offer aluminium Crittall-style windows specifically designed to give you a similar look for a lower price tag.
These metal frame windows have similarities – they both offer fantastic durability and longevity. And they’re both a viable solution for listed buildings and conservation areas.
However, they still have their individual strengths and weaknesses.
Here’s how aluminium windows compare on key points.
Cost
Aluminium windows cost less than steel windows. In fact, they cost on average just half the price of bespoke steel frames!
Head over to our cost guide for aluminium Crittall-style windows to learn more.
Strength
Aluminium and steel windows are both strong and secure.
However, steel is around three times stronger than aluminium. With that in mind, aluminium windows will have lower width and height restrictions.
Longevity
Again, aluminium and steel windows are both long-lasting and durable.
But steel windows tend to last for longer with the right care and maintenance – you’re looking at around 50 years for steel windows compared to around 30 years for aluminium.
Maintenance
Neither steel nor aluminium windows require much maintenance.
That said, aluminium windows can’t rust, while steel windows can. This means you’ll typically need to carry out more maintenance to your steel windows to prevent them from corroding.
Versatility
Steel windows could be considered more versatile, thanks to the fact they’re often made bespoke.
However, powder-coated aluminium windows are available in a huge range of colours and finishes.
Availability
While steel windows require a specialist company for installation and are often made bespoke, aluminium windows are widely available.
With that in mind, they’ll usually have much shorter lead times.
Aesthetics
Aluminium Crittall-style windows offer a similar look to steel ones but they’re still a replica.
Investing in the real thing is the only way to get the authentic look of genuine steel windows.
Find an expert to install your metal windows
Whether you decide to invest in real steel windows or a metal window alternative, you’ll need to find a trusted expert to install them.
Luckily, it’s easy to find the best company for the job here at Checkatrade.
All our tradespeople pass up to 12 checks and are regularly reviewed on everything from punctuality to professionalism.
In fact, we’re so confident in the quality of the trades on Checkatrade that if you book through us, we guarantee their work up to £1,000 (guaranteed for 12 months – Eligibility and T&Cs apply).
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