Are Decorio external doors weatherproof?

Yes — when paired with our weathered threshold, Decorio doors meet BS 6375-Part 1 for weather performance. With thermal breaks, quality gaskets, and secure seals, they offer strong resistance to wind, rain, and air infiltration.

Can I use these doors in a conservation or heritage property?

Yes, Decorio heritage-style doors are designed to be suitable for conservation and heritage properties.

Our external doors feature multi-point locking, durable aluminium frames, and laminated or toughened safety glass. 3-star security cylinders are available, and the system can be specified to meet Secured by Design guidelines.

What colours are available?

Popular finishes include black, white, and grey to Qualicoat standards. You can also choose from 200+ RAL colours.

Steel-Look Aluminium External Doors

Garden view of aluminium steel look doors

Steel-Look Heritage External Doors

Decorio’s steel-look aluminium external doors bring together the timeless elegance of traditional steel glazing with the performance, efficiency and security expected from today’s homes. Whether you’re renovating a period property, upgrading a modern extension or replacing old timber or steel units, our heritage-style system offers all the charm of classic steel — with none of the maintenance drawbacks.

Designed for both contemporary and character homes, these industrial-style heritage doors provide slim, refined sightlines that maximise light, frame beautiful views and create a striking architectural feature. Every door is precision-built to order in the UK for flawless quality and a seamless finish.

Often chosen as a Crittall-style alternative, our art deco-styled external doors perfectly complement our slim profiled external windows. View the matching window range here.

View our External gallery

internal shot of grey heritage doors and sidelights in kitchen

Cozy indoor corner with a tan leather armchair, decorative pillow, side table, and large glass door showing a snow-covered heritage door with stone walls and plants.

Built for British Weather, Built to Last

External doors face harsher conditions than internal glazing, so durability matters. Our aluminium system is engineered specifically for outdoor use, with:

Weather-resistant powder coated profiles with
marine grade finish
High grade stainless steel hardware available
Advanced polyamide thermal break
Toughened or laminated glazing options
Optionial low thresholds for improved access

Combined with an advanced polyamide thermal break, your home stays warm in winter, cooler in summer and noticeably more energy efficient all year round. View our blog on weather proofing your home here.

Single Doors

Our single external heritage doors are perfect for side entrances, kitchen doorways or utility access points. The ultra-slim steel-look frame maximises light while the durable aluminium construction provides year-round weather protection.
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Customise your design with heritage-style single doors, featuring flexible transom and bar layouts. Whether you want a classic grid pattern or larger panes with fewer bars, we can tailor the sightlines and transom heights to suit your space and style.

French Doors

Create a beautiful garden connection with our steel-look external French doors. The elegant central meeting stile and slim aluminium profiles allow more glass, more daylight and a brighter living space. Ideal for patios, terraces and kitchen extensions.

Our French door sets include a handle block on the primary leaf, finished with your choice of hardware. The secondary leaf can be configured with or without a matching handle — giving you full control over symmetry, function, and finish.

Heritage steel-look hinged french door with handle

Kitchen Extension with Crittall Style Doors and Windows in Grey

Configurations & Side Panels

Our aluminium heritage-style hinged doors can be paired with matching side panels, toplights, or fixed frames to suit larger openings. This modular approach allows you to create full-width glazed façades or balanced doorways that retain character while enhancing natural light and garden views.

For added functionality, you can also incorporate opening window sashes into the side panels — ideal for natural ventilation in kitchen diners, garden rooms, or heritage refurbishments.

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Case Study: Heritage & Modern Renovations with Decorio

Every home tells its own story. Our steel-look doors are designed to fit them all — bringing heritage charm to traditional cottages and light-filled sophistication to modern renovations. Whatever your style, Decorio doors deliver elegance, warmth, and lasting quality.

Black heritage-style aluminium doors and sidelights by Decorio fitted to a stone cottage, opening onto a garden with stone step

Heritage Cottage, Peak District

Here we have a charming cottage installation on the edges of Greater Manchester in the Peak District. The weathered stonework is beautifully complemented by our slim, steel-look external doors and windows.

It’s a perfect example of how heritage-inspired design can respect a building’s original character while adding modern comfort and energy efficiency. The timeless black finish and elegant glazing bars preserve the period aesthetic, while the performance of aluminium brings lasting warmth, security, and ease of use.

See our blog on how our external collection is perfect for conversation areas here.

Modern Rennovation - Lancashire

This modern installation in a leafy Lancashire village combines smooth rendered walls with crisp black aluminium frames for a clean, contemporary look. Large glazed panels brighten the ground floor and create a seamless connection to the garden — a perfect example of how steel-look external French doors elevate modern living spaces.

The homeowners chose a set of heritage-style external aluminium doors with matching sidelights, adding a bold yet minimal feature to the property. Slim sightlines maximise the view, while the thermally efficient aluminium system keeps the home warm and comfortable throughout the year.

This project shows how our external steel-look doors and windows work beautifully alongside matching external windows for a consistent modern look— offering slim profiles, strong weather protection and lasting durability. With PAS 24-rated security, the family felt confident knowing their new external door system delivered both style and safety.

Black crittal-style aluminium doors and windows by Decorio installed on a modern cream-rendered home with landscaped garden and contemporary sculpture

Whether your goal is to stay true to a building’s heritage or embrace a modern, minimalist style, Decorio helps you create a space that looks beautiful and feels effortlessly comfortable. Talk to our team or connect with a trusted local installer for expert advice on sizes, layouts and glass options

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External Door Features

Part M Threshold

For added accessibility, our 33mm outer frame is available with a 15mm low threshold. Meeting Part M regulations, this option provides easy of entry for those who require it.

Ramps can be included inside and out for ramped access.

Thermal Efficency

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 doors meet the latest DOC L building requirements.

High Security Standard

Every Decorio external door is available with PAS 24 security certification, providing enhanced protection with multi-point locking, secure hardware and impact-resistant glazing.

This makes the system suitable for security focused renovations and Document Q new-build projects.

Frequently Asked Questions

From thermal performance to glazing options and planning permission, this FAQ covers everything you need to know. Whether you're renovating a period home or starting a new build, find clear answers to help you choose the perfect steel-look external doors for your project.

External DOOR hardware

Finishing Touches

Complete the look of your external heritage steel-look door with our range of traditional and contemporary handles. Choose from classic lever designs, Art Deco styles, and other period-inspired options — all available in durable, weather-resistant finishes to match your preferred style. Every detail is considered to ensure lasting performance and a refined, authentic finish.

Windsor lever handle

Standard lever handle with backplate

Angled Mitre Lever Handle

Crafted from 316 marine-grade stainless steel, this Angled Mitre Lever Handle features a slim backplate and contemporary mitred design.

Durable, smooth to operate, and ideal for modern aluminium doors, it offers long-lasting performance in any environment.

Swan neck lever handle

Sculpted lever handle with backplate.

Art Deco lever handle

Traditional lever handle with backplate

Premium Art Deco handle

Traditional lever handle with backplate.

Knurled Lever Handle

Traditional lever handle with backplate

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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!

Steel-Look Heritage External Doors

Built for British Weather, Built to Last

Single Doors

French Doors

Configurations & Side Panels

Case Study: Heritage & Modern Renovations with Decorio

Heritage Cottage, Peak District

Modern Rennovation - Lancashire

Part M Threshold

Thermal Efficency

High Security Standard

Are these doors the same as Critall Doors?

Are Decorio Steel look external doors weatherproof?

Can I use these external doors in a conservation or heritage property?

Are your external single and french doors secure?

What colours are available for your heritage-style doors?

What glazing options can I have on Decorio’s external steel-look doors?

Windsor lever handle

Angled Mitre Lever Handle

Swan neck lever handle

Art Deco lever handle

Premium Art Deco handle

Knurled Lever Handle

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