ALUK Commercial Aluminium Doors

GT55 TB Thermally Broken Door System

The GT55 TB is an all-round high performance and heavy duty commercial door system, that is perfect for offices, hospitals, schools, warehouses and any other settings that require robust performance, high security and longevity of use without compromising on thermal performance.

The system comes with many options, ┬ámeaning that you can tailor it to fit your project’s needs:

  • Available with a full range of security and customisable hardware
  • Electronic and manual access systems easily integrated
  • Glazed or non-glazed options
  • Available in single or dual colour option, polyester powder coating and anodised finishes
  • Standard or DDA compliant overhead closer

Design Features:


  • Anti-finger trap styles
  • Thermal break technology for enhanced thermal performance
  • Unique security and safety features
  • DDA compliant overhead closer options using Dorma RTS 87
  • Structurally enhanced door framing
  • Fully glazed, commercial swing door
  • Incorporates high security mechanical dead lock
  • Mechanical and electro-mechanical multipoint locking options