Custom Internal Doors

A Superior Selection of Internal Doors

Once you start designing the interiors of your home, you will find that there are numerous types of interior doors to select from to impart the room with the right look and still allow it to cater to its function. Originally designed to suit the Triline range of cavity sliding doors, we have continued the growth of our variety and style of internal doors for both sliding and hinged door applications.

Internal Door Options

Triline offers a range of interior timber door options that come in a variety of materials, sizes and finishes, giving you unique options for quality doors throughout the dwelling. We make sure each of them is manufactured to high industry standards, for the client’s satisfaction.

With our wooden door panels, you’ll find limitless possibilities. Our collection includes:

Flush Panel Doors

  • Clean modern look
  • Glass panel options
  • Timber Veneer options
  • Solid Core, Semi Solid Core, Poly Core constructions

Routed Doors

  • Wide range of decorative features
  • Manufactured using CNC Router
  • Glass panel options

Timber Joinery Doors

  • Solid Hardwood Timber construction
  • Various Timber Species available
  • Ability to stain or clear coat natural timber
  • Glass panel options

Kitform Doors - Oversized

  • Supplied as 2 or 3 panels to be joined on site
  • Ideal for oversized sliding doors
  • Easier to maneuver on site 


  • Solid timber edge strips for added protection
  • Paint grade or raw finish construction available on request
  • RHS inserts for added rigidity to minimise twist or bow in doors
  • Rebated for Zero Clearance hardware to save installation time on site
  • Glazed or unglazed vision panel option
  • Metal Clad Doors


  • Internal use
  • Residential
  • Commercial
  • Sliding door
  • Hinged door
  • Pivot Door 

Custom Size Interior Doors

We manufacture custom sized interior doors suitable for residential and commercial applications. These doors are an integral part of our quality door system, and engineered with the same quality and robustness. Always focusing on attention to detail and customer satisfaction, our primary goal is to meet and even exceed your expectations.

Special sizes, other individual components and accessories please contact us.