When planning an extension, few window and door types are as visually effecitive as slimline steel-look glazing. The iconic grid-style appearance works in modern and period homes alike—adding light, structure, and architectural clarity. And right now, using steel look windows in an extension, old or new is bang on-trend.
At Aluco, we’ve redefined the look with our own exclusive aluminium steel look systems. Unique, distinctive, not a rebranded existng product nor is it a product with nothing more than a bar transom on the glass. Only Aluco is precision-engineered, made to order, and hand-finished. Aluco offers your new extension a more thermally efficient, cheaper and faster to obtain solution than steel windows as well.
Whether you’re designing a glass box kitchen, a garden-facing dining space, or a contemporary internal layout, Aluco gives you what we believe to be the best steel-look window and door collection in the UK market. Here’s how you can use steel look windows in a an extension without losing any of the wow factor.
Why Choose Aluminium Steel-Look Glazing for Your Extension?
Authentic steel glazing is high-end, but comes with drawbacks—cost, weight, only basic compliance on U-Values and very long manufacturing times. Steel remains the original product by nature of the material and some long-established and well-known brands.
Aluco was created to offer an aluminium alternative. With slimline aluminium frames, purpose-designed profiles, and exclusive styling elements that closely match the styling and proportions of original steel windows and doors, our system provides the distinctive look and architectural presence—with more options for your home, your budget, and your timeline.
1. Design a steel-look Extension
A new extension with top to bottom windows and doors, and a glazed roof remains one of the most striking and effective ways to add to your living space.
This box extension made by us and installed by Sherborne Windows in Surrey, showcases how steel-look glazing can be used to create entire walls conservatory or organgery walls.
This project showcases steel look bifold doors, steel look windows and fixed glazing. The result is a contemporary addition with industrial style views, ideal for kitchens, dining rooms or open-plan lounge spaces or just a place to relax.
View the case study of this stunning garden room by Sherborne Windows.
2. combine windows with new Patio Doors
If you have an existing extension with the original doors and windows, you can change these to the latest steel look style. Our Aluco Elite Windows blend perfectly with our folding sliding system. Use bifold or French doors at the front, with side glazing to bring in even more natural light.
Patio doors in any style remain the most practical glazed door style for many homes—offering full-width openings and a balanced aesthetic. With Aluco’s steel-look design, you can replace bulky patio doors with sleek, industrial-inspired French doors that connect effortlessly to the garden. Add matching sidelights or toplights for extra scale and light. Industrial style glazing isn’t just for a newly built extension, they can transform an older home too.
Here’s an example of an existing extension transformed with French doors and steel look windows.
3. separate your extension with internal doors
If you are fortunate to have a large enough space, why not make it multi-functional and separate it into two distinct zones? Aluminium steel look doors with matching side windows are perfect for separating your room when you need a dedicated space, such as working from home. And all our doors are designed to open effortless and give you the entire room to enjoy as well.
This project by Emma Merry design, takes advantage of a connecting bathroom off a dressing area, by adding a steel look internal sliding pocket door, which creates privacy when required, but opens up the newly built space at other times.
Discover this outstanding home enhanced with Aluco steel look windows in an extension and inside the home.
4. take advantage of existing features
Steel look windows in an extension aren’t confined just on the ground floor. An award-winning example of how you can build a conservatory on a flat roof to create additional liviing space.
This project comprised a new bedroom and bathroom and is another fine example of how Aluco windows and doors breathe new life into any home.
5. make the most of a kitchen and dining space
A new rear extension with a combined kitchen, dining and family area, is one of the most popular ways to extend the back of your home. Aluco windows and doors work beautifully here, giving you expansive patio doors with one-off designs as well.
This incredible Art-Deco home near bath, showcases how you can design the perfect multi-functional room and provide the perfect finishing touch with steel look windows in an extension with matching doors.
6. Create a Juliet balcony
Building a two story extension with bedroom above? Why not add style to your bedroom incoporating a set of steel look doors as a Juliet Balcony?
The contemporary nature of our doors means they sit beautifully behind a frameless glass balcony. More light, better ventilation and the beauty of Aluco Elite French doors means they’re not just for the downstairs of your home.
7. Create a new roof terrace
Did you know that original Art-Deco Homes frequently had a little terrace leading off the main bedroom? An excellent example of this is here in this news story where a home was sold left completely original inside and out.
In this incredible home near Bath, the rear extension now features a terrace off the new main bedroom and the steel look doors and windows are a perfect fit. This stunning home features all our Aluco exterior windows and doors, professionally installed by CBP in Corsham, Wiltshire.
8. separate an existing extension or conservatory
Whether you have an existing conservatory, orangery or built extension as well as when building a new one, Aluco steel look doors are perfect for closing off the extension when needed.
Adding internal doors creates a coherent look to both the exising room and the new or existing space you’re connecting to and adds a matching look inside your home too. Aluco has a slimline, steel-like collection of internal doors and screens to complement our Elite Exterior Collection.
Aluco – The best way to get the steel look
Aluco was created for homeowners, architects and builders who want the steel look with none of the limitations. With shorter lead times, more customisation, premium grade aluminium, Qualicoat Assured colour finishes, aluminium profiles that capture the feel of original steel doors and windows, Aluco is the alternative that doesn’t compromise.
Ready to plan your extension? Contact us to discuss your project or arrange a visit to one of our specialist showrooms.
