Edge restraint
An edge restraint is a physical barrier at the perimeter of segmental paving that prevents pavers migrating outward and bedding sand washing away.
Ask Chalkline about this →An edge restraint is a physical barrier installed at the perimeter of a segmental paving area (concrete or clay pavers) to prevent individual pavers from migrating outward under load and to stop bedding sand washing out at the free edge. Without edge restraints, pavers at the perimeter of a flexible-set area gradually spread, joints open, and the surface becomes uneven.
Common types include concrete haunching (50 mm wide minimum, 100 mm deep, cast against the paver edge), steel or aluminium channel restraints (pinned to the sub-base at maximum 600 mm centres), and plastic snap-in systems (adequate for pedestrian-only paving). For driveways, concrete haunching or heavy-duty metal restraints are required to withstand lateral vehicle loads. Existing walls, kerbs, or concrete edge beams can act as the restraint where they abut the paving.
Also known as: paving edging, edge board, concrete haunching
Category: Paving installation
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Last updated: 2026-05-08. Verified: 2026-05-08. Quarterly review for currency.