Why Our External Steel Doors Are Built to Last — and Built Differently
When it comes to external steel doors, not all profiles are created equal.
At Black Steel Doors, we deliver more than just visual appeal — we deliver security, durability, and long-term performance that withstands real-world conditions.
The Problem with W20 for External Use
Many companies still rely on the W20 profile for both internal and external applications. Yes, it looks sleek and offers design flexibility — but it was originally created for interior use, and that’s where the limitations begin.
- Thin steel sections
- No thermal breaks
- Minimal insulation
These flaws make W20 a risky choice for external doors, especially when facing temperature swings, condensation, or harsh UK weather.
Our Profile — Designed for the Outdoors
At Black Steel Doors, we developed a dedicated external steel system that performs where others fail. Our features include:
- Integrated thermal break for improved energy efficiency
- Double- or triple-glazing for superior insulation and strength
- Weather-resistant materials for long-term durability
We combine elegance with engineering. Our modern, loft-style doors offer the slimmest sightlines in steel — all while maintaining full structural integrity.
Fully Bespoke, Fully Protected
Every door is tailor-made to suit your project:
- Choose your size, colour, glass type, and layout
- Enjoy premium-grade security, insulation, and weather performance
- Ideal for front entries, full-height screens, and more
The UK’s First and Only External Bifold Steel Doors
We’re proud to be the only company in the UK offering genuine external bifold doors.
These unique doors feature:
- Thermally broken profiles
- Double or triple glazing
- Airtight sealing
- Effortless folding for panoramic views
- High-strength steel in every panel
Perfect for linking living spaces with gardens, terraces, and patios — combining industrial elegance with real-world function.
Choose Innovation Over Imitation
While others reuse profiles never meant for external use, we’re leading with purpose-built solutions.
We don’t follow trends — we set new standards.
If you’re designing for the outdoors, choose doors engineered to thrive in it.
Choose Black Steel Doors — where performance meets design.
