Cavity slider
A cavity slider is a door that retracts fully into a wall cavity on a concealed track. The pocket frame goes in at first fix before sheeting.
Ask Chalkline about this →A cavity slider (also called a pocket door) is a door leaf that slides fully into a concealed cavity within the wall when opened, leaving the full opening clear. The cavity is formed by a purpose-built pocket frame kit installed in place of standard studs at first fix, before the wall is sheeted. Once sheeted, only the door opening and the flush hardware are visible.
Cavity sliders are specified where swing-arc space is not available, such as ensuite doors, laundry doors, and narrow corridors. The rough opening for a single cavity slider requires approximately double the door leaf width plus 60 mm, meaning the wall section housing the cavity must be planned at the framing stage, not retrofitted after sheeting. Standard systems suit stud walls from 70 mm to 100 mm thick and carry door leaves up to approximately 65 kg. Cavity sliders cannot be used as fire doors: the self-closing mechanism required by NCC 2022 Housing Provisions cannot be incorporated in a pocket system (verified 2026-05-10).
Also known as: cavity sliding door, pocket door, pocket slider
Category: Doors and joinery
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Last updated: 2026-05-10. Verified: 2026-05-10.