Steel Framed Glass Doors & Partitions

Built for Modern Interiors

Internal & external W20 steel door systems for luxury residential & commercial spaces.
Most door projects fall between £4,500 – £22,000 installed, depending on size & glazing.
Get an Instant Cost Estimate →
Fast lead times • British made • 5-year warranty
Fast Lead Times
5 Year Warranty
Bristish Made
UK-Wide Installs

Rated 5 Star by Homeowners & Architects

Our new windows are excellent, installed right on schedule despite the current supply challenges. The finish is top quality and the whole process was made stress-free with clear and regular updates. We’ll definitely be using Jack Nicholas Windows & Doors again in the future.

DAVID WILSON

Fantastic service from start to finish! The doors are beautifully made, every detail finished to perfection. Even with the difficult market conditions, delivery was on time and communication was superb. I would highly recommend Jack Nicholas Windows & Doors to anyone.

SOPHIE HARRIS

JN Windows & Doors exceeded expectations with both their product and service. The craftsmanship is outstanding, and the installation team made everything simple and smooth. We’re thrilled with our new doors and window. Thanks again for such a great experience.

MARK ANDERSON

From the first enquiry to final installation, the whole experience was seamless. The team kept us updated at every stage and delivered exactly when promised. The quality of the steel windows is outstanding, and they’ve completely transformed our home.

EMMA CARTER

As an architect, I’ve worked with many suppliers, but Jack Nicholas Windows & Doors consistently stand out. Their attention to detail, precision in fabrication, and commitment to deadlines make them an invaluable partner. My clients are thrilled with the results every time.

JAMES WATERS
Get Your Free Quote >>

W20 Steel Doors – Slim, Strong & Beautiful

At Jack Nicholas Windows & Doors, our steel doors share the same uncompromising quality as our windows.

Ultra-slim sightlines frame your views beautifully, flooding your home with natural light.

Engineered for energy efficiency and strength, our doors are designed to perform as good as they look.

With a wide range of styles – from strikingly modern to timelessly traditional – you can create the perfect entrance or interior feature.

Internal or External

Our W20 steel door system is one of the slimmest hot-rolled steel framing systems available today.

Using authentic steel glazing bars, we’re able to offer an almost limitless choice of configurations and styles.

The system performs equally well in both internal and external applications, and can be combined with window sections or other doors to create larger screen assemblies.

Bespoke Service

Our creative designs and precise engineering allow us to deliver a truly bespoke service. Whatever your requirements, our team can develop a tailored solution.

Expert Manufacturing
Every Jack Nicholas product is crafted using advanced machinery and hand-finishing techniques for exceptional accuracy. This precision means our frames perform better, last longer, and can be delivered faster.

Expert Installation
From your first consultation to the final fitting, our trained Jack Nicholas team oversees every stage of your project — ensuring consistent quality, precision, and care throughout.

Special Commissions
Looking for something unique? From steel partitions to custom furniture features, we welcome special commissions. If you can imagine it, we can help you build it.

Commercial Experience
Our team also works closely with architects, builders and designers on commercial and heritage projects. We’re experienced in navigating planning requirements and building regulations to deliver outstanding results on time and on budget.

Get Your Free Quote >>

Why We Are Different

At Jack Nicholas Windows & Doors, we combine design expertise, advanced manufacturing and dedicated installation teams to deliver steel windows and doors of exceptional quality. We’re proud to offer:

  • Bespoke Design – Tailored to your exact vision.

  • Speed of Turnaround – Advanced manufacturing with short lead times.

  • Expert Installation – Seamless delivery and installation for a perfect finish.

  • Special Commissions – Unique projects welcome.

  • Commercial Experience – We handle complex specifications and compliance.

Examples of our work
Our Process

Turning enquiries into perfectly fitted steel doors

Contact Us >>
Send details & photos
Fast Quote >>
24h aim
Site Survey >>
Accurate sizes
CAD Sign-Off >>
No surprises
Manufacturing >>
UK workshop
Powder Coat >>
+ glazing
Installation >>
& QC
Aftercare
We’re here

FAQ's

Q1: Do you offer bespoke sizes?
Yes, every product we manufacture is made to measure to fit your exact requirements.

Q2: Are your products energy efficient?
Absolutely — our steel and aluminium windows and doors are designed with high thermal performance to help reduce energy costs.

Q3: Do you provide installation services?
Yes, our in-house team of experts manage the process from design through to professional installation.

Q4: What finishes are available?
We offer a wide range of powder-coated colours, glazing options, and hardware finishes so you can fully customise your product.

Got a Project in Mind?

We’ll Create the Perfect Solution for You.
Get A Quote
Working hours:

Monday – Friday:  8:00 – 18:00

Phone: 01462 674222

Address:
Jack Nicholas Group
The Crows Nest
Clothall Bury
Nr Baldock Herts
SG7 6RJ

Instagram

JN Windows & Doors is part of Jack Nicholas Group