1. Types of Internal Doors:
   • Hinged Doors: These are the most common type of internal doors in Australia. They swing open and close on hinges attached to the door frame.
   • Sliding Doors: Sliding internal doors operate by sliding along a track attached to the door frame, conserving space and providing a modern look.
   • Bi-fold Doors: Bi-fold internal doors consist of two or more panels that fold in on themselves when opened, creating a wide opening and maximizing space.
   • French Doors: French internal doors typically feature multiple glass panels and swing open on hinges, adding a touch of elegance and allowing light to flow between rooms.
   • Pocket Doors: Pocket internal doors slide into a recessed compartment in the wall when opened, effectively disappearing from view and saving space.
   • Barn Doors: Barn internal doors slide along a track mounted above the doorway, reminiscent of traditional barn doors, and are popular for their rustic charm.
2. Materials:
   • Timber: Timber internal doors are a popular choice in Australia due to their natural warmth, durability, and versatility. They can be made from various types of wood, including pine, oak, mahogany, and cedar.
3. Sizes:
   • Internal door sizes in Australia typically range from 2040mm to 2340mm in height and 620mm to 920mm in width, with standard thicknesses of 35mm to 40mm. However, custom sizes can also be made to fit specific requirements.
4. Styles and Finishes:
   • Internal doors in Australia come in a wide range of styles and finishes to suit different interior design preferences, including traditional, contemporary, rustic, and minimalist.
   • Common finishes for internal doors include paint, stain, veneer, and laminate. They can also feature decorative elements such as panels, glass inserts, and moldings.
5. Installation and Maintenance:
   • Internal doors are typically installed by carpenters or tradespeople during the construction or renovation of a building. Proper installation ensures smooth operation and a secure fit within the door frame.
   • Regular maintenance, such as cleaning and lubricating hinges and tracks, helps prolong the lifespan of internal doors and ensures they continue to function properly over time.

Overall, internal doors play a crucial role in defining the functionality and aesthetics of interior spaces in Australia, offering a wide range of options to suit different architectural styles, design preferences, and budget considerations.