6m Tall Sliding Doors

6m tall sliding doors create uninterrupted moving glass across double height elevations, allowing architects to remove horizontal framing from spaces defined by exceptional scale, views and natural light.

The minimal windows® NGS range is engineered for individual sliding panels up to 6m high, 18m² in area and 1,500kg in weight. For projects requiring tall sliding glazing beyond standard dimensions, the minimal windows® technical team can assess the system, glass specification, wind exposure, structural support, automation and installation strategy from the earliest design stages.

Can sliding doors reach 6m tall?

Yes. The minimal windows® NGS system provides a defined product solution for conventional horizontal sliding panels up to 6m high.

However, maximum height cannot be considered in isolation. Pane width, total area, glass weight, building exposure, wind loading and the supporting structure all influence whether the proposed design can be achieved.

The following published maximums provide a starting point for specification:

• minimal windows® NGS: Up to 6m high, 18m² and 1,500kg per sliding panel
• minimal windows® 4+: Up to 4.5m high, 12m² and 1,000kg per sliding panel
• Original minimal windows®: Up to 4m high and 8.5m² per sliding panel

The original minimal windows® and minimal windows® 4+ systems may sometimes be engineered beyond their standard tested heights where the project conditions permit. Portland Road, for example, uses a minimal windows® 4+ sliding door measuring 5.77m high.

These larger bespoke applications require project-specific analysis and should not be treated as standard maximum dimensions.

Learn more about 6m tall doors, including the engineering, structural and installation considerations that determine what is possible.

minimal windows® NGS for 6m tall sliding doors

The minimal windows® NGS was developed for exceptionally large sliding glass panels and demanding contemporary architecture.

Each sliding panel can reach:

• Maximum height: 6m
• Maximum area: 18m²
• Maximum panel weight: 1,500kg
• Insulated glass thickness: 34mm to 74mm
• Vertical interlock: 26mm

The system uses thermally broken aluminium framing with the head, base and perimeter profiles concealed within the surrounding building finishes. When specified with the hidden handle option, the closing profile can also disappear into the wall, leaving only the slim vertical interlocks visible across the glass elevation.

This creates floor-to-ceiling moving glass with up to 99.3% transparency when the doors are closed.

Invisible threshold options

The minimal windows® NGS Floor system allows the base frame to be recessed below the surrounding floor finishes.

Natural stone, timber, marble or other finishes can continue over the base frame to reduce the visible threshold and strengthen the connection between the interior and exterior.

The sliding rails and wheels remain accessible for cleaning, servicing and maintenance. This is particularly important for external doors in the UK, where drainage, leaves and debris need to be managed throughout the life of the system.

Integrated drainage, structural support and finished floor levels must be coordinated during the early design stages.

Performance at an architectural scale

Exceptional glass dimensions must be considered alongside the required performance of the building envelope.

Published performance for the NGS range includes:

• Air permeability: Class 4
• Resistance to wind load: Class C4
• Driving rain resistance: Class 8A
• Thermal performance: Uw values from 0.8 W/m²K, depending on glass and configuration
• Security: Up to RC3
• Insulated glass thicknesses from 34mm to 74mm

The glass can be developed around the specific requirements of the project, including:

• Double or triple glazing
• Low-emissivity coatings
• Solar control coatings
• Laminated glazing
• Acoustic glass
• Low iron glass
• Enhanced security specifications

Performance values must be calculated for the proposed panel dimensions, glazing build-up and configuration. A stated system value should not be assumed to apply automatically to every 6m installation.

Project-specific 6m door engineering

The structural and operational requirements of 6m tall sliding doors differ significantly from those of standard residential glazing.

Wind loading

A large glass panel creates a substantial surface area against which wind pressure can act. The required glass thickness, interlock design and framing reinforcement must therefore be assessed against the location and exposure of the building.

A sheltered London property may allow a different design from an exposed coastal or rural site.

Panel weight

Large insulated glass units can weigh more than one tonne. The selected system, wheel carriages, rails and supporting structure must be capable of carrying the full operational load.

Where the panels become too heavy for practical manual use, concealed automation can provide controlled and consistent movement.

Structural support

The structure above and around the sliding doors must remain within the required deflection tolerances. Movement in the head structure can affect the alignment, weather performance and operation of the doors.

Early coordination between the architect, structural engineer, main contractor and glazing specialist is essential.

Transportation and lifting

The ability to manufacture a large sliding panel does not automatically mean that it can be delivered to the site.

Road access, crane positions, lifting equipment, temporary storage and the route from the delivery vehicle to the structural opening must all be reviewed before the glass is ordered.

Installation and sequencing

Oversized glazing needs to be integrated into the wider construction sequence. The installation strategy may affect when structural elements, external cladding, internal finishes and landscaping can be completed.

Read more about the engineering considerations for tall glazing.

Automated 6m tall sliding doors

Automation may be incorporated into minimal windows® systems where panel weight, accessibility or the intended method of use makes manual operation unsuitable.

Concealed drive mechanisms allow large panes to move without introducing visible motors or bulky controls into the completed elevation.

Available control approaches can include:

• Wall-mounted switches
• Dead man controls
• Remote operation
• Smart home integration
• Building management system integration
• Controlled opening and closing sequences

Safety requirements, emergency operation, power supply and future maintenance access must be considered during specification.

Explore the available automated sliding glass doors.

Alternative minimal windows® systems

Not every double height project requires an individual sliding panel measuring exactly 6m.

The original minimal windows® sliding doors support panels up to 4m high and 8.5m², with 21mm vertical sightlines.

The minimal windows® 4+ triple glazed sliding doors support tested panel heights up to 4.5m, areas up to 12m² and panel weights up to 1,000kg, with 26mm vertical sightlines.

These systems may provide the correct solution where the required panel area, thermal performance, glazing specification or architectural proportions do not require the full NGS capacity.

A combination of sliding doors and fixed glazing above can also create a double height glass elevation without requiring one moving pane to span the complete height.

Configurations

Available 6m Tall Door Configurations

6m tall sliding doors can be developed in a range of configurations, subject to the panel dimensions, structural design and engineering assessment.

Available arrangements can include:

• Single sliding panels
• Multi-track sliding doors
• Biparting sliding doors
• Fixed and sliding combinations
• Hidden pocket doors
• Open corner sliding doors
• Automated sliding systems
• Concealed threshold designs
• Full height glazed façades combining fixed and moving units

The maximum 6m panel height may not be appropriate for every configuration. The complete arrangement must be reviewed against panel weight, movement, drainage, structure and installation access.

Specification Support

Specifying 6m Tall Sliding Doors

Successful oversized glazing begins with early technical coordination.

The initial specification should establish:

• Required panel height, width and area
• Sliding and fixed panel arrangement
• Number of tracks
• Glass build-up and total weight
• Site-specific wind loading
• Structural support and allowable deflection
• Manual or automated operation
• Threshold and drainage requirements
• Thermal, acoustic and solar performance
• Delivery and lifting access
• Installation sequencing
• Long-term maintenance requirements

The minimal windows® technical team can review architectural drawings and help determine the appropriate system, configuration and glazing specification.

Contact minimal windows® to discuss specifying 6m tall sliding doors for an architectural project.

Featured In

Built Examples of Exceptionally Tall Moving Glass

Portland Road

Portland Road features a minimal windows® 4+ sliding door measuring 5.77m high.

The two-panel system spans two storeys of a renovated Notting Hill townhouse and sits beside a double height internal void. The sheltered urban location and project-specific engineering allowed the system to exceed its standard 4.5m tested height.

Sky House showroom

The minimal windows® showroom at Sky House contains an NGS sliding-door installation measuring more than 6m high.

The three-track system demonstrates the NGS hidden handle, concealed framing and automated operation at full architectural scale. Architects and clients can experience the movement, framing details and threshold design before specifying the system.

Camlet Way

Camlet Way uses three automated vertical sash installations measuring just over 6m high.

These are vertically moving sash systems rather than conventional horizontal sliding doors. They provide a related example of how minimal windows® profiles, automation and concealed engineering can create operable glazing across a double height elevation.

Related Content

• 6m Tall Doors: What’s Possible with Modern Sliding Glass Systems?
• Oversized Sliding Glass Doors
• Double Height minimal windows® Installations
• Sliding Glass Door Sizes
• Open Corner Sliding Doors
• minimal windows® NGS
• minimal windows® 4+
• Original minimal windows® Sliding Doors