External Steel Doors
Bespoke Slimline Steel Doors for Modern Homes
Supply & Install Nationwide
At Steel Door Online we deliver bespoke external steel doors engineered using industry leading Jansen and Ottostumm systems combining ultra-slim sightlines, thermal performance, and long-term durability for modern and heritage homes across UK.
- Manufactured using premium European systems (Jansen Arte 2.0 & FerroFinestra W50TB / W75TB)
- Thermally broken steel profiles with high-performance double or triple glazing
- Supply only or supply & installation available across the UK
- Used in high-end residential and Industrial projects across the UK
- Wide range of premium finishes including RAL colours, matte & metallic options
- Strong thermal performance with low U-values depending on system & glazing
Watch ▶️ our external steel door Below 👇🏿
Made to Measure
10 Years Guarantee
8 Weeks Lead Time
10000+ Happy Customers
What Our Customers Say
Real feedback from homeowners, architects and builders who chose our bespoke steel door systems.
What Are External Steel Doors?
External steel doors are high-performance door systems constructed using thermally broken steel frames combined with insulating double or triple glazing. Unlike traditional timber or aluminium doors, steel allows for significantly slimmer sightlines, resulting in a clean, minimal, and architectural appearance.
Modern external steel doors are engineered to meet current performance standards, incorporating:
Thermally broken steel profiles
Double or triple glazing units
Weather-resistant seals
Advanced locking systems
This makes them suitable for both residential and commercial applications, including extensions, garden connections, and main entrances.
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Collection
Our Collection Of External Steel
Door Systems
Jansen Arte 2.0
Ultra Slim External Steel Doors
Jansen Arte 2.0 is one of the most advanced steel door systems available, designed for projects where minimal sightlines and maximum glazing are required.
Key features include:
- Ultra-slim profiles (as narrow as 25–40mm)
- Thermal performance with Uw values as low as 0.8 W/m²K
- Glazing options from 20mm to 47mm
- Ideal for contemporary and heritage applications
This system is particularly popular for large glazed openings and modern extensions, where maximising natural light is essential.
Wanted to buy Jansen Arte 2.0 external steel doors. Send us your requirements and we will assist you further
FerroFinestra W50TB & W75TB
Classic Steel Look with Thermal Performance
The FerroFinestra systems combine traditional steel aesthetics with modern performance.
- W50TB offers a slim, classic steel appearance
- W75TB provides increased strength and larger spans
- Fully thermally broken profiles
- Suitable for French doors, double doors, and feature entrances
These systems are ideal if you want a heritage steel look with modern insulation performance.
Wanted to buy FerroFinestra external steel doors systems. Send us your requirements and we will assist you further
Janisol Steel Doors
High Performance Entrance Solutions
Janisol systems are designed for projects requiring greater structural strength and durability.
- Thicker and more robust profiles
- Suitable for main entrance doors
- Supports multi-point locking systems
- Ideal for high-traffic or security-focused applications
Janisol is often recommended when performance and strength are prioritised over ultra-slim aesthetics.
Wanted to buy Janisol external steel doors. Send us your requirements and we will assist you further
Our External Steel Doors Systems Comparison
The table below compares our three external steel door systems, giving you a clear understanding of their differences and applications. At Steel Door Online, transparency is a priority, ensuring you can make an informed decision with confidence. Once you get in touch, a dedicated specialist will be assigned to guide you in selecting the most suitable system for your property.
External Steel Doors Prices
Every external steel door we supply is made to measure, which means pricing can vary depending
on your specific design, size, and chosen options.
Key factors that influence the price include:
Door size and overall configuration
Selected system (Jansen, Ottostumm, or Janisol)
Glazing specification and performance requirements
Hardware choices and finish options
Rather than offering generic price ranges that may not reflect your project accurately, we provide tailored quotations to ensure you receive the most suitable solution and best value for your requirements.
Our team will guide you through the options and provide a clear, detailed quote based on your exact needs.
Configuration & Styles
Our External Steel Door Configurations
All Our external steel doors systems which are shown above are available in a wide range of configurations to suit different spaces and design requirements. We supply & install all the styles and configurations for all type of properties.
Please hover on each image to get more details about each configuration options displayed below.
All of the above external steel door configurations can be customised with a variety of glazing bar (transom bar) styles and glass options, with full details outlined in the glazing and hardware sections below.
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Glazing Options
We offer a wide range of glazing options for our external steel doors, allowing you to customise the level of light, privacy, security, and thermal performance to suit your project.
Our standard specification includes:
- 24mm double glazing (4mm toughened / 16mm argon / 4mm)
- Glass U-value approx. 1.1 W/m²K
Optional upgrades include:
- Triple glazing for improved thermal performance
- Laminated safety glass for enhanced security
- Frosted or obscure glass for privacy
- Low-E glass coatings for energy efficiency
- Acoustic laminate glass for noise reduction
- Solar control glass to reduce heat in direct sunlight
The overall performance of the door depends on both glazing and frame design.
Security, Strength & Performance
Our External steel doors systems are known for their exceptional strength and durability.
🔒 Security Features
- Steel frame construction
- Multi-point locking systems
- High-quality locking hardware
- Option for enhanced security configurations
It is important to note that slim-profile steel systems may not always meet PAS24 or higher RC classifications, and requirements should be discussed during the design stage.
⛈️ Thermal Performance
- Thermally broken steel frames
- Insulated glazing units
- Weather sealing systems
These features help maintain indoor temperatures and improve energy efficiency.
💪🏻 Durability
- Resistant to warping, cracking, and rot
- Long lifespan compared to timber
- Suitable for UK weather conditions
Made to Your Measure
Bespoke External Steel Doors Options
All our external steel doors are made to measure and can be fully customised to suit your requirements, including size, configuration (with or without side panels or top lights), colours, hardware options, and glazing bar layouts. Our team will guide you in selecting the most suitable option for your property. Click on each tab below to explore these options in more detail.
Size & Configuration
- Made to measure for your opening
- Suitable for small and large-scale installations
- Multiple panel configurations available
Colour Options
We offer a wide range of colour finishes to suit both contemporary and traditional properties.
- Standard colours include black, anthracite grey, and white
- Full RAL colour customisation available
- Matte, satin, and textured finishes
- Specialist finishes such as bronze or metallic coatings
We offer a wide range of colour finishes to suit both contemporary and traditional properties.
Hardware Options
Hardware plays a key role in both functionality and aesthetics.
Available options include:
- Lever handles and pull handles
- Heritage-style handles for traditional designs
- Modern minimal hardware for contemporary doors
- Multi-point locking mechanisms
- Hinges designed for heavy-duty use
Hardware finishes can be matched to your overall design, including black, stainless steel, brass, or custom finishes.
Design & Grid Layouts
- Steel grid designs for industrial style
- Minimal glazing layouts for modern aesthetics
- Custom bar layouts to suit architectural requirements
Place your order today with us
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⚠️ Attention Please...
Important Considerations Before Choosing External Steel Doors
Choosing the right steel door system depends on several factors.
Not all slim systems meet high security standards
Outward opening options may be limited depending on the system
Structural requirements vary based on size and configuration
System selection should be based on usage and performance needs
We guide you through these considerations to ensure the correct solution is specified.
Lead Times, Manufacturing and Ordering Process
We make every external steel door to measure because perfection lives in the details.
The result is a door that doesn’t just fit your opening, it looks as though the
wall was built around it.
Lead Times
APPROX.
8 Weeks
Lead Time
Applies to:
- All sizes
- All colours
- All systems
How to Order From us?
It is simple you just need to submit the form at the end of this page with your details and our team will handle the rest. Further, our process is below.
- Provide opening sizes and basic layout information.
- We prepare drawings and specifications.
- Doors are manufactured to order in UK factories.
- Delivery or installation is arranged.
Note: All products are drawing-based. We do not carry out site surveys, which allows faster processing and nationwide coverage.
NATIONWIDE SUPPLY AND FIT SERVICE
Supply and Fit of External Steel Doors Across the UK
At Steel Door Online we offer the two clear options of supply only
and fit on our all steel doors range with nationwide coverage
across United Kingdom.
Supply Options
Supply only
Idea if you have your own installer or builder.
Supply and Fit
Installed via our network of Fensa Approved installers.
We operate across the United Kingdom, working with FENSA-approved installers. Some postcode exclusions apply and are confirmed at quotation stage.
Why choose us
Why Choose Steel Door Online?
A specialist approach, measured engineering, and a calm buying experience — designed for people who care about details.
Trading since
2014
Backed by an established UK business
Warranty
10 years
Confidence built into every door
Made in
UK
Manufactured in UK factories
Installation
FENSA
Approved installation partners
Specialist internal steel door focus
We focus exclusively on external, internal & fire rated steel doors and partitions — a dedicated brand built to deliver precision, not a broad catalogue.
Ultra-slim steel profiles
Architectural sightlines designed to maximise glass and light while maintaining a refined steel structure.
UK manufacturing
Manufactured in UK factories with controlled processes, consistent finishing, and dependable lead times.
Acoustic and laminated glass upgrades
Optional upgrades for better sound reduction and enhanced security — ideal for home offices and busy households.
FENSA-approved installation partners
Supply & fit across the UK through experienced, FENSA-approved installation partners.
Transparent pricing guidance
Clear example pricing and honest specification guidance, so you can make a confident decision without guesswork.
10-year warranty
Every internal steel door is supplied with a 10-year warranty for long-term confidence and peace of mind.
Backed by a company trading since 2014
Steel Door Online is a specialist division supported by an established UK business trading since 2014 — giving you reliable support before, during and after your project.
Request a Quote & FAQs
Frequently Asked Questions
In the following section we have already answered the common questions you might have in your mind.
And with that there is a simple enquiry form which you can submit without any cost. And you will get an
instant quote right to you inbox.
Request a free quote
Share your opening sizes and preferred configurations. We'll respond with a tailored quote.
By submitting, you agree we can contact you about your enquiry. We never sell your details.
FAQs
Tap a question to view the answer.
Yes, our modern external steel doors systems include thermal breaks and insulating glazing to improve energy efficiency.
Our steel doors are highly secure due to their strong frame construction and advanced locking systems.
Yes, in our external steel doors system double glazing is standard, with triple glazing available as an upgrade.
No, modern steel doors are powder-coated and treated to resist corrosion.
Typical lead time is around 8 weeks depending on specification.
Yes, all doors are bespoke and can be customised in size, layout, colour, and hardware.
Contact Details
Prefer to speak to our specialists? We're happy to help
CALL
01525 552131
Website
steeldooronline.co.uk
* Some postcode exclusion apply and are confirmed at quotation stage.