Heritage Aluminium Windows | Art Deco & Steel-Look Styles

Slim fixed Grey Heritage Windows with traditional brick

Internal view of fixed heritage grey window

Slimline Aluminium Windows with Steel-Look Aesthetic

Our steel-look aluminium windows are designed to echo the timeless beauty of traditional steel-framed glazing, while delivering the performance and efficiency of modern aluminium. Whether you're restoring a listed building, updating a period property, or working within a conservation area, Decorio windows offer an authentic heritage look with exceptional durability.

Slim sightlines, low-maintenance materials, and outstanding thermal performance make them ideal for both renovation and new-build projects. Fully compliant with PAS 24 and Document Q, they meet today’s standards for energy efficiency and home security — without compromising on charm.

Looking to complete the look? Our heritage-style external doors and matching internal steel-look doors allow you to carry the same architectural character throughout your home.

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Replace Old Steel or Timber Windows with Ease

Our aluminium heritage windows are expertly designed to replace traditional steel or timber frames — offering a seamless upgrade for listed buildings, period renovations, and conservation areas. They preserve the authentic steel-look aesthetic while delivering the benefits of modern performance and efficiency.

The modular frame system allows for straightforward configuration and installation, with options for top-hung, side-hung, and fixed units. This flexibility makes them ideal for both sensitive heritage projects and modern property upgrades, ensuring consistency in sightlines and style across entire elevations.

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Features

Polyamide Thermal Break

Our thermal break technology provides enhanced thermal performance, ensuring your home is thermally efficient all year round.

Combined with high performance glass, our range of windows meet the latest DOC L building requirements.

Astragal Bars

Enhance your windows with astragal bars, allowing the steel-effect aesthetic to permeate your entire project and perfectly harmonize with your heritage doors.

Available in 25mm or 41mm
thickness., the bars are 3mm in depth

Slim Profile

Our windows feature one of the slimmest profiles on the market, boasting sightlines as slender as 59mm.

Outer frames are available are 48mm or 33mm, offering you creative freedom to design the look and feel of your dream project.

Heritage window on listed building renovation

Customise Your Heritage Look — Glazing, Bars & Colour Options

Every Decorio window is built to suit your project — whether you're restoring a period home or creating a bold, steel-look feature in a modern build. Choose from traditional astragal bar designs, slim steel-style sightlines, and Art Deco-inspired hardware to complete the authentic heritage feel.

All windows come with high-performance double glazing as standard, and can be fitted with trickle vents where needed. You can also personalise your frames with over 200 RAL colours, including textured and dual-colour options — ideal for matching existing detailing or creating contrast across elevations.

With this level of flexibility, our aluminium windows & doors are perfectly suited to conservation refurbishments, architect-led homes, and character-driven developments.

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Frequently Asked Questions

Whether you're replacing ageing steel frames or upgrading a period property, these FAQs cover everything you need to know about our aluminium heritage windows. From glazing options to performance, security, and planning considerations — get clear answers to help you choose the perfect steel-look solution with confidence.

window hardware

Finishing Touches

Personalise your Decorio external windows with a curated range of steel-look window handles. From heritage-inspired monkey tail styles to sleek Art Deco levers, each piece is available in multiple finishes & designed to complement traditional façades or elevate contemporary builds with authentic detailing.

Era espag handle

Standard espagnolette handle with lock

Angled Stainless Steel Handle

Marine grade stainless steel angled handle.

Monkey tail and tear drop handle for windows

Monkey Tail or Tear Drop handle

Traditional heritage espag handles with elegant rosette key.

Art Deco lever handle

Traditional lever handle with backplate

Premium Art Deco handle

Traditional lever handle with backplate.

Knurled Espag Handle

Premium knurled finish Inline espagnolette window Handle.

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Let us help you find a local installer - hassle free

Find An installer

At Decorio, we have successfully supplied premium steel-effect aluminium doors and windows nationwide for several years. While we don't install them ourselves, our trusted customers have continually relied on us to provide top-quality products, which they then install with expertise and at competitive prices.

Sit back and let us guide you to your nearest Decorio specialist installer, ensuring a seamless and professional experience. Trust in us to deliver precisely what you desire!

Slimline Aluminium Windows with Steel-Look Aesthetic

Replace Old Steel or Timber Windows with Ease

Polyamide Thermal Break

Astragal Bars

Slim Profile

Customise Your Heritage Look — Glazing, Bars & Colour Options

Are Decorio heritage windows suitable for listed buildings and conservation areas?

How thermally efficient are the aluminium windows?

Do they come with safety or laminated glazing?

Are they made in the UK?

Era espag handle

Angled Stainless Steel Handle

Monkey Tail or Tear Drop handle

Art Deco lever handle

Premium Art Deco handle

Knurled Espag Handle

Let us help you find a local installer - hassle free

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