Solid core door
A solid core door has a dense engineered or timber infill, making it the standard for all external door openings in Australian residential construction.
Ask Chalkline about this →A solid core door has a continuous dense infill: typically particleboard, MDF, timber stave, or mineral composite. The solid core makes the door dimensionally stable, weather-resistant, and capable of carrying locks, hinges, and hardware under regular use. All external door openings in residential construction use solid core construction: hollow core doors (cardboard or foam-cell infill) are for internal rooms only and cannot provide the weather resistance, security, or fire performance required at the building envelope.
Solid core doors can achieve fire ratings under AS 1905.1 and security certifications under AS 5039.1:2023. A self-closing solid core door minimum 35 mm thick is required by NCC 2022 Housing Provisions Part 9.2.3 where an opening penetrates a fire-separation wall between a dwelling and an attached private garage (verified 2026-05-10).
Also known as: solid core
Category: Doors and joinery
Related
See also
- Flashing, the waterproofing detail around door openings
- Practical completion inspection
Last updated: 2026-05-10. Verified: 2026-05-10.