Why Choose RK Steel for Your Crittall-Style Steel & Glass Doors

Bespoke Steel & Glass Doors Built on 30 Years of Experience

There’s a moment in most home renovation projects where the standard options just don’t cut it anymore. You’ve spent months refining the layout, the lighting, the finishes — and then you hit the doors. The off-the-shelf stuff looks exactly like what it is. You start looking elsewhere.

That’s usually when people find RK Steel.

A Family-Run Steel & Glass Door Business

RK Steel grows from the same passion that built RK Door Systems into one of the UK’s most respected entrance door specialists. With over 30 years in the doors and windows industry, that same commitment to quality, craftsmanship and customer service now extends to the world of Crittall-Style steel and glass doors, partitions and windows.

That history matters. It means the people making your doors have seen every installation challenge imaginable, every tricky reveal, every awkward ceiling height. It means when something needs solving, it gets solved — not passed up a corporate chain.

Still run by the same hands, RK Steel brings that depth of experience to every order, whether it’s a single internal door or a full glass partition system across multiple rooms.

Everything is made to measure to your design

This isn’t a catalogue business. Every Crittall-style door, screen and partition RK Steel produces is fully bespoke — designed around your space, your measurements, your aesthetic.

The online design tool lets you configure your door from scratch: choose your frame profile, your glass type, your grille pattern, your colour or finish, your handles. You can see it take shape before you commit. It’s a level of control that most suppliers simply don’t offer.

For architects and interior designers, that matters enormously. Specifying a door that will actually fit the vision — not just approximate it — is the difference between a project that lands and one that looks almost right.

Industry-Leading 10-Year Warranty on Powder Coating & Glass

RK Steel offers a 10-year warranty on powder coating and glass. It’s the longest in the market.

Warranties are easy to dismiss as small print, but this one is worth paying attention to. It reflects something about how these doors are built — the quality of the steel, the finishing process, the confidence that comes from decades of experience. Nobody offers a 10-year guarantee on a product they’re not sure about.

Secure by Design & PAS24 Accredited External Steel Doors & Windows

For external steel doors and windows, RK Steel holds both Secure by Design and PAS24 accreditation — the same standards required by many local authorities and insurance providers.

It’s reassuring for homeowners. For architects working on projects where planning or building regulations require certified security performance, it removes a potential headache entirely.

Steel & Glass Doors in any colour – Farrow & Ball, Metallic Finishes

The industrial steel and glass aesthetic is having its moment — and it’s easy to see why. Clean lines, maximum light, a look that works equally well in a Victorian terrace or a contemporary new build.

But RK Steel’s range goes considerably further than the classic black frame. Six standard colours, any RAL shade, Farrow & Ball and Little Greene options, and the exclusive ANKA liquid metal coating range — including finishes in antique bronze, brushed brass and smooth copper — mean there’s a version of this aesthetic for almost every interior.

Add the choice between clear, Satinato obscure, or patterned glass, plus an extensive grille library, and the design possibilities are genuinely broad.

Steel doors vs aluminium doors — why the material matters

Not all Crittall-Style steel and glass doors are created equal. And steel and glass doors are not the same as aluminium ones, even when they look similar in photos.

Steel is significantly stronger than aluminium, which allows for much slimmer sightlines and larger expanses of glass without compromising rigidity. Combined with fully welded, handmade construction — rather than the mechanically assembled sections common in aluminium systems — the result is a door that feels more substantial, more refined, and more permanent.

The finish is different too. In person, the depth and consistency of a powder-coated steel frame is noticeably superior to most aluminium alternatives. It’s one of those things photographs rarely capture, which is exactly why visiting a showroom is worth the trip.

Aluminium doors can be a perfectly good solution at a lower price point. But if the goal is a door that becomes part of the architecture of a room rather than just a functional element within it, steel is in a different category entirely.

We’ve written about this in more detail — read our full breakdown of why steel doors cost more than aluminium, and why many homeowners still choose them →

Soundproof Doors, FD30 Fire Doors, 0% Finance & More

A few things that often surprise people when they dig into the range:

Soundproofing. The 36dB sound-rated hinged doors are a quietly brilliant solution for anyone working from home, or anyone who wants a partitioned space that actually feels separate. Enhanced glazing and drop-down seals do the work.

Fire doors. RK Steel’s FD30 fire doors come in both classic and ultra-slim frames — the latter is new for 2026 and brings certified fire performance into spaces where standard fire door aesthetics would be a compromise.

Finance. 0% finance is available through Ideal4Finance, which makes a significant purchase more manageable without changing what you buy.

Supply or install. Whether you have a trusted installer or need RK Steel’s own team, both options are available.

 4 UK Steel Door Showrooms — See the Doors Before You Buy

Four UK showrooms — Cornwall, North London, Swindon and Surrey — mean that for most people, there’s a real door to look at, touch and open within reasonable distance. That’s not something every specialist in this space can offer.

It makes a difference. Steel and glass doors photograph beautifully, but the weight of the frame, the action of the hinges, the quality of the finish in person — that’s what actually sells them.

The short version of why you should choose RK Steel

If you want a bespoke steel and glass door or partition that’s been designed around your space, finished to a standard that will still look right in 20 years, and backed by a family business that’s been doing this longer than most — RK Steel is a straightforward choice.

Get in touch with your local showroom to make an appointment Visit a showroom →