Steel frame internal doors: transforming interior spaces with Crittall’s signature style

• 28 February 2025
• News

Steel frame internal doors have experienced a surge in popularity in contemporary interior design. The iconic slender profiles and striking aesthetic of Crittall Windows’ steel internal doors are a sophisticated addition to interior design and architecture, complementing any prestigious residential properties, commercial spaces and heritage renovations across the UK.

This guide explores the potential of steel frame internal doors. From technical specifications and customisation options to practical applications and design possibilities, we’ll delve into everything architects, builders, and property owners need to know about incorporating these distinctive elements into their projects. Whether you’re looking to improve natural light flow through your space, create flexible living spaces or simply wanting to update the aesthetic appeal of your interior design, Crittall Windows’ innovative internal door solutions offer versatility and elegance.

Modern internal steel doors

Steel frame internal doors have become a signature feature in high-end residential and commercial projects. Their impressive structural integrity and distinctive aesthetic add details that complement both traditional and contemporary interior styles.

Crittal Windows’ Innervision internal doors are the perfect example of this, with incredibly slim frames that accommodate large glass panels, these systems maximise natural light flow within indoor living areas. Other features of this innovative design include:

• Customisation Options – unlike mass-produced alternatives, every internal door is custom-made to exact specifications including colour, hardware, configuration and size.
• Durability – all products are hot-dip galvanized in a special powder coating finish, improving the overall durability and extending the longevity of the product.

For those looking for internal sliding doors, Crittall also offers a fantastic solution within the Innervision range. This system features:

• Minimalist Profiles – slim frames, narrow sightlines and expansive glass panels, create uninterrupted views and maximising light flow.
• Flexible Design – multiple opening options including pocket, rebate and face-mounted configurations suit various requirements.
• Soft-Close Mechanism – this premium feature ensures smooth, quiet operation while adding a touch of luxury.

Technical specifications and performance features

Material excellence and durability

Unlike aluminium alternatives that mimic the steel look, genuine steel frames offer superior structural integrity and a more authentic aesthetic. Steel’s inherent strength allows for the exceptionally slim profiles that define the look associated with steel windows and doors manufactured by Crittall Windows.

As a durable option with exceptional longevity, steel frame internal doors are a wise investment that truly stand the test of time. The hot-dip galvanisation process provides comprehensive protection against corrosion, while high-quality powder coating creates a finish that resists scratching, fading as well as general wear and tear. This combination ensures that Crittall’s internal doors maintain their pristine appearance and smooth operation for decades, making them a truly sustainable choice.

Hardware and operational features

Each component on the Innervision range is carefully selected for its durability and operational excellence.

The width of the door openings can be customised to suit specific architectural requirements, with configurations ranging from compact single doors to double doors or expansive room dividers spanning several metres.

Customisation options

Crittall Windows offers an extensive range of colours to complement any interior design. From subtle greys and sophisticated navy blues to bold statement hues and strong metallics, the powder-coated finish can be specified to virtually any colour.

As the selection of glass can also dramatically influence the overall look and functionality of the doors, the glass panels in the Innervision steel frame doors can be completely customised.

Architectural applications and design possibilities

One of the many advantages of steel frame internal doors is their ability to divide spaces without reducing the amount of natural light flooding a space. Unlike solid walls that completely separate areas, steel doors with glass panels create boundaries and distinct functional zones filled with light. This makes them ideal for contemporary open plan living, where there’s often a desire to maintain openness while creating a degree of separation.

Residential transformations

Here are some examples of how the internal doors can be applied in different residential settings:

Home offices

Steel door dividers are an ideal solution for home working spaces. The transparency maintains a sense of spaciousness, whereas the frames create a practical separation needed to reduce noise and distractions during professional video calls.

Bathroom dividers

In bathroom design, slimline steel doors have revolutionised shower rooms thanks to their impressive aesthetics and water resistance.

Kitchen connections

The boundary between kitchen and dining areas is the perfect place for steel frame internal doors. They allow cooking spaces to be occasionally separated (containing odours and noise) while maintaining visual connectivity.

Commercial applications

Beyond residential settings, Crittall’s internal doors can also be applied in various commercial environments:

Offices

Steel frame internal doors create meeting rooms and private work areas that remain visually connected to the wider office, perfect for creating a collaborative workplace culture.

Hospitality

In hotels, restaurants and bars, internal doors create zoned areas that can be utilised for a number of different requirements. Private spaces can be effortlessly divided while maintaining the atmosphere from across the entire venue.

Retail

Luxury retail outlets embrace internal steel doors as a way to create distinct departments without reducing visibility across the shop floor.

The investment value of Crittall internal doors

Quality and longevity

Unlike less durable materials or steel look products that will need replacing after a decade or two, high quality steel systems continue to perform and maintain their streamlined appearance for generations. This exceptional longevity turns the initial price into a long-term investment that continues to add value to any commercial or residential property.

Design timelessness

The appeal of the Crittall aesthetic is timeless. While many interior elements will date quickly, steel frame internal doors complement changing interior trends and styles. This is evidenced where original Crittall installations, from decades ago, are now classed as key features in heritage and period properties.

Sustainability credentials

Manufactured in the UK using high-grade recycled steel means Crittall internal steel doors are a sustainable choice. This is because the steel can be recycled indefinitely without weaking its properties and negatively impacting its performance, reducing the demand for raw materials and energy intensive production processes.

What are the benefits of using steel frame internal doors?

The exceptional versatility of internal doors – from classic French doors to innovative sliding systems – makes it possible to create subtle divisions in open-plan living, enhancing natural light flow and adding a visually striking features to minimalist interior design.

For architects, builders and property owners, the investment in Crittall’s steel frame internal doors delivers lasting value thanks to their extraordinary durability, timeless aesthetic and transformative impact on internal spaces.

For more information about Crittall’s Innervision internal doors and sliding door systems, or to discuss your specific project requirements, speak to a member of our technical team for expert advice.