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Metador Ltd,
Britannia House,
John Boyle Road,
Middlesbrough,
TS6 6TY
Contact
Find Us
Metador Ltd,
Britannia House,
John Boyle Road,
Middlesbrough,
TS6 6TY
Bespoke internal steel doors for commercial, industrial and public buildings, with durable steel frames and options for glazing, acoustics, fire resistance, and accessibility.
Metador’s internal steel doors are designed for buildings where durability, flexibility, and reliable everyday performance matter. From high-traffic corridors and communal areas to plant rooms, risers and controlled-access spaces, our made-to-measure steel doorsets can be configured around the requirements of each opening.
Steel gives architects, contractors, and specifiers a durable alternative to conventional internal doors, while modern finishes, glazing and frame options mean it can work just as well in visible architectural spaces as it does behind the scenes.
Metador’s range of internal steel doors includes single and double doorsets, glazed and acoustic options, DDA-compliant configurations, specialist riser doors and dedicated fire rated internal doors.
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Internal steel doors are steel doorsets designed for openings within a building rather than its external envelope. Depending on the application, they can provide durable everyday access, control movement between different parts of the building, support acoustic separation, protect service areas or meet specialist requirements such as fire resistance.
A complete internal steel doorset typically brings together the door leaf, steel frame, hinges, seals and ironmongery, with glazing, side panels, over panels or other options added where required.
The performance of an internal steel door is about more than the door itself. For instance, a strong leaf installed with unsuitable hardware or an inappropriate frame can quickly become the weak point.
Metador manufactures bespoke doorsets so the leaf, frame, hardware, seals and other components can be considered together from the start. This helps the project team specify a doorset that is appropriate for the opening and aligned with the relevant performance and regulatory requirements.
In most commercial and public buildings, internal doors aren’t the first thing you choose — and it can often feel like you don’t need to spend too much time choosing them.
However, these doors work remarkably hard, much harder than most people imagine.
Think about a hospital corridor, school, leisure facility or busy office. Doors may be opened constantly, struck by equipment, used by people with very different accessibility needs, and fitted with hardware ranging from a simple lever handle to electronic access control.
Steel is well suited to these environments because it creates a strong, durable door and frame system that can be adapted to suit the application.
It also gives specifiers considerable flexibility. Depending on the chosen doorset, internal steel doors can incorporate vision panels, acoustic performance, specialist ironmongery, side and over panels, decorative finishes and accessibility-focused configurations.
Modern steel interior doors can sit comfortably within offices, schools, hospitals, retail environments and residential communal areas, particularly where the project needs greater durability than a lightweight internal door can provide.
There is no single typical application for an internal steel door.
In commercial offices, steel doorsets may be used for staff areas, back-of-house access, storage rooms, or high-traffic circulation routes. Schools and universities can use them in corridors, sports facilities, service areas, and rooms that need more robust access.
Healthcare environments create another set of demands. High traffic, frequent cleaning, accessibility, acoustic separation, and equipment movement all influence door selection.
Industrial and infrastructure environments often need durable internal access around plant, storage, machinery, and controlled operational areas. Larger buildings may also require specialist doors for riser shafts and building services.
Common locations for internal steel doors across the UK include:
The specification should follow the function of each opening. For instance, a corridor door and a riser door may both be made from steel, yet they can have very different performance requirements.
If you search for internal metal doors, you will often find the same broad type of product, although “metal” can refer to several different materials.
Metador specialises in steel doorsets.
Steel provides a strong base material for the leaf and frame while allowing the doorset to be adapted to different architectural and performance requirements. This makes it particularly useful for commercial buildings where several types of internal openings may need to share a consistent appearance.
You may also see the term steel interior doors, particularly in design-led specifications and online searches. In UK construction terminology, “internal steel doors” is usually the more natural description, and it is the terminology we use throughout our range.
Whatever phrase appears on the specification, the important question is what the complete doorset has to achieve.
One of the least known facts in this industry is that the frame deserves as much consideration as the door leaf.
A complete system needs to suit the structural opening, wall construction, hardware, and the way the door will be used. In refurbishment projects, wall depths and existing openings can vary considerably, making frame design especially important.
Metador’s internal range includes systems developed specifically for this challenge.
The Duopar frame system, for example, uses an adjustable two-part steel frame manufactured to accommodate different wall depths. It is primarily designed for internal applications and can be supplied with steel or timber leaves, giving designers additional flexibility where a steel frame is desirable but different leaf finishes are required.
For aesthetic purposes, the Duopar frame typically incorporates square-edged door leaves as standard for internal use and can also incorporate vision panels, side panels, over panels and acoustic options depending on the configuration.
Busy buildings expose doors to considerably more wear and tear than their specifications sometimes acknowledge.
Corridors, communal areas, and staff routes may see hundreds of movements a day. Trolleys, equipment, and deliveries add impact, while repeated operation places constant demand on hinges, closers, locks, and handles.
This is where steel construction earns its keep.
A strong internal steel doorset is well suited to areas where long-term durability matters and repeated repairs would cause disruption. It also gives facilities teams a durable base around which appropriate ironmongery can be specified.
Metador’s Safeguard, for example, is a stronger-than-standard steel doorset and uses galvanised steel construction with internal reinforcement. It can be configured with a range of hardware and other options according to the application.
Some internal openings form part of the building’s fire compartmentation strategy and require a specifically tested fire rated internal door.
Metador’s dedicated Fireshield internal fire-rated steel doorsets are independently tested to BS EN 1634-1:2014+A1:2018 and are available with E30, E60 and E120 integrity ratings, depending on the tested configuration.
These doors are used in areas such as protected routes, plant rooms, service areas, and other openings identified within the building’s fire strategy. Hardware, glazing and louvre options must remain within the relevant test evidence.
Need a fire rated internal steel door?
Sound control is an important consideration in many internal environments. A few examples:
Selected Metador doorsets are available with acoustic-rated options for applications such as meeting rooms, classrooms, healthcare spaces and industrial areas, subject to the required performance and doorset configuration.
One important thing to note here is that acoustic performance depends on more than the leaf. Frames, perimeter seals, thresholds, glazing, and other components all influence how sound travels through the opening.
If your project has a defined acoustic requirement, we recommend that you identify it early. The doorset can then be configured around that performance alongside the other demands placed on the opening.
Glazing can completely change how an internal steel door feels within a space.
Vision panels allow people to see approaching traffic, support safer movement through busy corridors, and help natural or borrowed light travel between rooms. Larger glazed areas can also make steel doors more suitable for offices, education, retail, and other public-facing environments.
Metador offers bespoke vision panels across compatible doorsets, with rectangular, square, and round options available depending on the chosen system.
Glazing specifications can also vary according to safety, privacy, acoustic, security, and fire requirements. Some applications may use clear glass for maximum visibility, while others need privacy films, obscure glass or specialist glazing.
Where the doorset has a tested performance requirement, the glazing must be compatible with that evidence.
Some internal doors are barely noticed by building users, yet their function is critical.
Riser doors provide access to services running vertically through larger buildings and need to fit discreetly into corridors and circulation areas while protecting the opening.
Metador’s Riserguard has been developed specifically for internal riser shafts and building service areas. It is available in a range of configurations and can provide fire resistance where required.
Dedicated riser doors are particularly valuable where architects need service access to remain visually discreet. Concealed-frame options and coordinated finishes allow them to integrate more cleanly with surrounding walls than a conventional plant-room style door.
For straightforward plant, storage or service access, another doorset may be more appropriate. Again, the opening should lead the specification.
Metador’s internal steel doors are available in configurations to suit different opening sizes and uses.
In most cases, a single doorset is often sufficient for standard personnel access. On the other hand, double doors can provide a larger clear opening for busy circulation routes, equipment movement, or wider architectural openings.
Side and over panels are available across compatible products where the structural opening extends beyond a conventional door size.
Some over panels can also be configured to provide occasional access for large equipment, which can be useful in plant and technical areas where machinery may eventually need to be replaced.
For non-standard applications and openings, we always recommend a bespoke system, because it has an unbeatable advantage: the doorset can be manufactured around the opening and the way it will actually be used.
While most people look at the door alone, ironmongery has a major influence on how a door performs day to day.
Depending on the Metador doorset and application, options can include locks, latches, lever handles, door closers, panic hardware, and other specialist hardware. Access-control systems can also be integrated into suitable configurations.
The right choice depends on who uses the opening.
For instance, a staff-only door may need controlled access, while a frequently used corridor door needs hardware that can tolerate repeated operation. Other doors may need to remain secured for most of the day while still supporting emergency egress.
Where the doorset carries a particular fire or security certification, hardware must remain compatible with the tested or assessed configuration.
This is why hardware is best considered during specification rather than added as an afterthought.
Steel gives designers far more visual freedom than the stereotypical grey plant-room door suggests. Colour can help a door disappear into an interior or make it deliberately prominent.
A coordinated finish can integrate service and staff doors with the surrounding design, while contrasting colours may help with wayfinding or create a stronger architectural feature, particularly when combined with glazing.
This flexibility allows internal steel doors to move comfortably between functional and design-led spaces.
Metador doorsets can be powder coated in a wide range of RAL colours, with special finishes available across appropriate products. Options within the wider range include textured, metallic and woodgrain effects, while the Decorguard upgrade introduces decorative grooves directly into the steel door skin.
There is no single right choice when it comes to choosing the right steel interior doors for a building. This is why we always recommend that our clients start with the opening and work outwards.
Working in this order makes it easier to avoid conflicting requirements and helps ensure the complete internal steel doorset is suitable for its actual role within the building.
Standard sizes work well and you can get them faster but there are cases where the building refuses to cooperate.
For instance, refurbishment projects frequently involve unusual openings and varying wall depths. New developments can also require a large number of doorsets with different dimensions and performance specifications.
Metador’s made-to-measure approach allows internal steel doors and frames to be configured around individual project requirements.
This is particularly useful for large buildings with various types of spaces and use cases. With the right door manufacturer by your side, different openings can achieve different functions while retaining a consistent overall aesthetic through coordinated colours, frame styles, and hardware.
For example, one corridor might contain ordinary access doors, acoustic doors, a glazed entrance, and specialist fire doors, and they can still feel like part of the same building if chosen right.
Metador has been manufacturing steel doorsets in the UK for projects across commercial, industrial, education, healthcare, residential, infrastructure, and other sectors for more than two decades.
We are one of the UK’s favorite door manufacturers because, for more than two decades, we have cut no corners when it comes to quality and client service.
Moreover, Metador can also support projects with product guidance, quotations, and access to approved Metador installers where required, because we know how important it is to find everything you need in a single place whenever possible.
Send us your drawings, door schedule, or project requirements and our team will help you identify suitable doorsets, configurations, hardware, and finishes.
What are internal steel doors used for?
Internal steel doors are used throughout commercial, industrial, and public buildings where durable access is required. Common locations include corridors, offices, schools, hospitals, plant rooms, service areas, communal spaces and technical facilities.
What is the difference between internal steel doors and internal metal doors?
“Internal metal doors” is a broad term that may describe doors made from several metals. Metador specialises in steel doorsets, using steel leaves and frames across its range to provide durable, configurable internal access solutions.
Can internal steel doors be fire rated?
Yes, when a specifically tested fire rated doorset is selected. Metador’s dedicated internal fire rated doors are available with E30, E60, and E120 integrity ratings depending on the tested configuration.
Can internal steel doors be acoustic?
Selected Metador doorsets have acoustic-rated options. The required performance should be established during specification because the leaf, frame, seals, threshold, and glazing can all influence acoustic performance.
Can internal steel doors have vision panels?
Yes. Custom-sized vision panels are available on compatible doorsets, with different glazing configurations depending on the product and the safety, privacy, acoustic, security, or fire requirements.
Are internal steel doors available as double doors?
Yes. Metador offers single and double steel doorsets, with side and over panels available across compatible ranges for larger structural openings.
Can internal steel doors be used with access control?
Suitable doorsets can be configured with access-control hardware. Where a specific fire or security certification applies, the hardware and configuration must remain within the relevant evidence or certification requirements.
Are Metador internal steel doors made to measure?
Yes. Metador manufactures bespoke steel doorsets to suit individual project and opening requirements, allowing size, frame configuration, glazing, panels, hardware, and finish to be specified together.
