Paver Edge Restraint Types Explained

Paver edge restraints keep the unit field confined at its boundaries. Choose a system designed for the pavement’s loading, base and edge condition. A decorative border course, soil backfill or garden edging strip is not automatically a functioning restraint.

Begin with the boundary condition

Map open edges, adjacent curbs, walls and pavement transitions. A suitable permanent structure can provide restraint, but it must actually contact and support the paving as detailed. A loose border, thin trim or nearby wall separated by a gap cannot be counted merely because it looks substantial.

CMHA PAV-TEC-003 covers restraints for interlocking pavers on flexible and rigid bases. Permeable pavement details require their own system guidance. No single fastener spacing or support geometry applies to every type.

Compare the restraint families

CMHA’s cited bulletin distinguishes metal systems, including its restriction of steel edging to rigid bases. Do not assume every metal strip can be spiked into flexible aggregate. Confirm the exact system’s permitted base and manufacturer instructions.

Flexible plastic is a pavement product, not lawn trim

Curvable plastic can suit a shaped edge where its application rating and attachment detail fit. The support must resist movement during installation and use. Match the prescribed anchor, spacing and base requirements; a product name alone does not establish a vehicle-capable detail.

Flat landscape edging chosen for separating mulch or grass serves a different purpose. It may lack the lateral capacity and contact geometry needed to confine pavers.

Concrete edges vary considerably

A structural curb, a precast edge and a troweled concrete haunch are different details. Section size, reinforcement, foundation support, loading and climate limits matter. Do not substitute a small concrete strip for a curb detail simply because both use concrete.

Transitions at vehicle braking or turning areas need particular attention. An edge adjacent to a driveway entrance may see different loading from a patio’s lawn boundary. Follow the project’s specified detail rather than applying a pedestrian solution everywhere.

Coordinate support with the base

Restraints must have the supporting foundation and contact prescribed for the system. In the conventional guidance, installing restraints on the bedding sand is not a suitable support detail. Base extension for a spiked restraint is a different situation from a curb with its own foundation.

The extension affects aggregate quantity and excavation. It should be entered from the selected detail, not from a universal number added around all projects. Drainage and potential bedding loss at joints or transitions also need coordination.

Fasteners are conditional quantities

Some systems use spikes or stakes, some use anchors into a rigid base, and concrete details may use neither. Obtain size, spacing, end and corner requirements from the applicable instructions. A length-divided-by-spacing result is a planning estimate; it does not represent every anchor in a discontinuous perimeter.

Likewise, a soldier or sailor border changes the visible paving but does not independently replace restraint. See the border-course guide before treating border units as structural confinement.

Select the boundary systems first, then use the Paver Edging Calculator to total the lengths assigned to the chosen product. Add package and fastening data only for the actual system being ordered.