Hollow core door
A hollow core door has a cardboard honeycomb infill, making it lightweight and suited to low-traffic internal rooms only — not wet areas or fire-rated openings.
Ask Chalkline about this →A hollow core door has a lightweight cardboard honeycomb infill enclosed within a timber perimeter frame, faced with MDF or plywood skins. Mass is typically 8 to 15 kg per leaf, making hollow core the standard choice for low-traffic internal rooms: bedrooms, living areas, robe doors and corridors where no special performance is required.
Hollow core doors cannot be used at wet areas or laundries (the honeycomb wicks moisture and skins delaminate), at fire-rated openings (they cannot achieve an FRL), or for mortised locks (the cavity is too small). Where a door penetrates a fire-separation wall between a Class 1a dwelling and an attached garage, NCC 2022 Housing Provisions Part 9.2.3(3)(b) requires a self-closing solid core door not less than 35 mm thick. Classified under AS 2688:2017 (verified 2026-05-10).
Also known as: hollow core, hollow-core door
Category: Doors and joinery
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Last updated: 2026-05-10. Verified: 2026-05-10.