Aluminium Inline Sliding Doors

These are typical sliding doors sitting directly on the rollers within single, double or triple tracks, inline sliding doors.  Available in a range of multiple sliding configurations and benefiting from having slim sightlines, inline sliding doors are flexible, versatile and ideal for both small and large openings.

Design and Aesthetic

  • Constructed from thermally broken profiles as standard. 
  • For a standard aluminium inline sliding door, the visible sightline of the meeting section starts at 40mm up to 80mm. 
  • Typically, inline sliding doors come with double and triple track options.

Size Limitations

  • The standard size for a single sliding door panel can reach up to 2500 mm in height. The total width of the sliding door is depending on the opening configuration. 
  • The dimension of a large-size sliding door panel can reach up to 1.4 metres in width and 3.5 metres in height. For a height higher than 3.5 metres, please look at the page for the high-end sliding doors.  
  • Depending on the hardware used, a sliding door panel may weigh up to 400kg.

Opening options

  • Track options: Monorrail, duo-rail, 3-rail
  • Double track: 2 panel (1 Fixed, 1 Sliding or Both sliding, 3 panel (2 Sliding, 1 fixed or vice versa), 4 panel (2 fixed, 2 sliding)
  • Triple track: 3 panel (all panels can be sliding)
  • Fixed corner: Most sliding doors in the market offer fixed posts for corner solutions. 
  • Open corner: Some sliding doors offer fixed posts for open corner solutions.

Colours and Finishes

Typically, aluminium sliding doors offer a variety of color and finish choices, including:

  • A full range of standard powder coated RAL colour options. 
  • Textured metallic finish options 
  • Dual colour options (Different colours for outside and inside)
  • Anodised in satin and bronze colours
  • Marine grade powder coated for for use in marine and coastal environments

Threshold and Sill Options

  • Aluminium sliding doors come with different options for thresholds. The common options are low threshold and flush threshold. 
  • Low threshold: It is a little bit higher than the finish floor level and provides balance between easy access and weather resistancy.  
  • Flash (level) threshold: This option provides easy acces but not fully weather protections as much as low threshold. It usually come with an integrated drainage to stop the water come inside. 
  • It is crucial to carefully evaluate all factors such as door location, traffic volume, and desired thermal and weather performance before making a decision for a threshold for your project.

Glazing Options

  • Double glass as standard (Ug=1.0 W/m2K, Low-e coating, warm edge spacers) 
  • Triple glass to achieve better thermal performance (Ug=0.5 or 0.6 W/m2K, Low-e coating, warm edge spacers) 
  • For added security, one pane of glass unit can be built as laminated.

Thermal Performance

According to Building Regulations Part L, sliding doors should meet the minimum u-values specified below:

  • For replacement doors in residential buildings, a sliding door have to achieve a U-value under 1.4 W/m2K for the whole door. (or Band C energy rating)
  • For new doors in residential buildings, a sliding door has to achieve a U-value under 1.6 W/m2K for the whole door. (or Band B energy rating)

Weather-tightness Performance

In terms of weather resistance, a typical inline sliding door should meet the minimum performance values listed below:

  • Air tightness: Class 4 (600 Pa)
  • Water tightness Class 9A (900 Pa)
  • Wind load resistance: Class C4 (1600 Pa)

Safety and Security

  • Aluminium outward opening side-hung windows usully comes with standard multi-point locking systems.
  • Burglar resistance classes of RC2 or RC3 are also available as security options,
  • PAS24 security option for the doors to be installed on ground floors of the new buildings.
  • Stoppers can be used to limit the amount of opening of the door panels for safety.

Compliance with Building Regulations

Aluminium sliding doors to be installed in residential properties are subject to the building regulations:

  • Sliding doors to be installed on the ground floors of new residential buildings have to comply with PAS24 security level. (Building Regulations Part Q)
  • Sliding doors to be installed in residential properties have to comply with Approved Document L in terms of thermal performance.

Buyer’s Guide to Aluminium Sliding Doors

Aluminium sliding door use in living room

Using aluminium sliding door to create an open corner


Aluminium inline sliding doors are a popular choice in residential buildings

  • As a patio door
  • As a balcony door
  • In conservatories 
  • In extensions