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Steel Doors and Windows

About fineline doors

Steel Window, Doors and Screens

Fineline’s steel windows and doors have consistently been the architects’ preferred choice for property extensions and continue to hold that distinction. A steel-style screen serves not only to close a hole in a wall but also acts as a substantial enhancement to the character and overall aesthetic of a partitioning glass façade, house extension, or conversion. The minimalist aesthetics and slender sightlines create an illusion of weightlessness, imparting a sense of airiness to the frames and highlighting the transparency of the façade. This level of elegance is challenging to replicate with the bulkier profiles found in alternative systems.

Our team of designers and engineers excels in transforming spaces with bespoke steel windows and doors, specializing in sliding doors and fixed screen solutions with impressive thermal values. These designs seamlessly reintroduce contemporary architecture into your surroundings.


What Our Clients Say About Us

Creating elegant, structurally unique and safe Glass Extensions throughout the UK.

“The Fineline team delivered our glass boxes in almost impossible timeframes which meant the laser survey and design process was condensed into a very short period of time so that the glass could be ordered. The construction of our glass boxes was then completed to programme with no delays. The product delivered is of exceptional quality and they now offer unique lounge spaces for our guests to enjoy the gardens throughout the year. Thank you to Andrew and his team. Neil Kedward, Managing Director, Seren Collection”

Neil Kedward
Google Review

“Fineline Doors designed and delivered a glass extension to our house and we can’t be more happy with the way it turned out. The product itself is very nice – the glass beams and finish are excellent. The insulation is amazing too – we were a bit worried it would be cold but it works exactly as advertised – not too cold in the winter, not too hot in the summer. The installation was performed by an excellent team, led by Tyler who really knows his stuff. All in all I wouldn’t hesitate to recommend this company.”

John Simmons
Google Review

“Fineline provided me with 3 arched, 2.6m high steal Crittall style doors to the rear of our house and aluminium crittall style windows to our extension and more. We are delighted with the results and the compliments keep coming. Andrew has been a delight to work with and his attention detail very comforting. Highly recommend Glasspace. A glass extension is next and we will definitely be speaking with Andrew, having seen the his previous very extensive projects.”

Google Review

How It Works

Fineline and its team work hard to make the process of adding a new bespoke glass extension to your home or commercial building as easy as possible.

At Fineline Doors we encourage you to take advantage of our complimentary design consultation with an advisor.


Laser scanners give a exact indoor or out door measurement in three dimensions “At your fingertips”

Concept Design

Using the latest 3-dimensional solid modelling and CAD systems, we produce computer-generated images 


All structures are tailor-made to your chosen design, and once the raw materials the aluminium frames will be custom extruded


Your bespoke structure will be installed by our own team of highly skilled fitters / engineers at your location


Our team will ensure your project is completed to the highest level of quality and maintenance will be available

About fineline doors

Bespoke Steel Windows And Doors

Each steel window and door we provide and install is meticulously crafted from aluminum and metal, offering a transformative touch to your home. At Fineline Doors, we extend to all our customers the opportunity to envision the final outcome of their new glass extension through a personalized bespoke design.

Steel windows, doors, and screens hold a synonymous reputation for quality within both domestic and commercial design realms. Introducing steel elements to your structure not only enhances its aesthetics but also makes a bold architectural statement. Contact us for further information regarding your project.