Proper patio edging prevents outer stones from migrating outward, keeps joints tight, and creates a clean finished look. The best edging for a natural stone patio is a stone soldier course — flagstone or cut stone set vertically along the perimeter — installed at $12–$22 per linear foot in Los Angeles. Steel and aluminum landscape edging offer a lower-cost alternative at $4–$8/linear ft. The right choice depends on your patio material, aesthetic goals, and soil type.
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Quick Answer: Stone patio edging holds your patio's perimeter in place, prevents lateral spreading, and creates a polished finished edge. The best option for natural stone patios is a stone soldier course — matching flagstone or cut stone pieces set vertically on edge along the perimeter and secured in mortar or compacted concrete. Cost in Los Angeles: $12–$22 per linear foot installed. For budget projects, steel or aluminum landscape edging ($4–$8/linear ft) is a functional alternative that is largely hidden once installed.
Without a restraining edge, the outer stones of any dry-lay patio gradually migrate outward under repeated foot traffic, soil expansion, and seasonal temperature cycling. In Los Angeles, expansive clay soils push against patio edges with considerable force during the wet season. Over 3–5 years, an unedged patio develops bowed edges, widening joints, and an increasingly ragged perimeter that requires complete re-setting of the affected stones.
Edging serves three functions: structural restraint (holds stones in place laterally), aesthetic definition (creates a clean line between patio and lawn, garden, or gravel), and drainage control (can be designed to direct water away from the patio surface and house foundation).
Edging is critical for dry-lay flagstone and pavers. Without it, the outer row shifts outward within 1–3 years. A soldier course in mortar or steel landscape edging driven 6–8 inches into the subbase provides the lateral restraint needed to keep sand-set stone in position long-term.
Mortar-set patios on a concrete base are inherently more stable. However, a finished stone or concrete border still prevents chipping of edge stones, defines the visual perimeter cleanly, and transitions the patio gracefully to adjacent plantings, lawn, or gravel areas.
Edging height and slope determine where water drains off the patio surface. A soldier course set 1/4 inch below the patio surface allows water to sheet off naturally. Setting it flush or proud traps water at the edge. Plan edging height with drainage direction in mind.
written and reviewed by independent licensed contractors in the Tegula Stone network.
The right edging material depends on your patio material, your budget, and the desired aesthetic. Here is a detailed comparison of the five most common options used on Los Angeles natural stone patios.
Matching or complementary flagstone or cut stone pieces set vertically on edge, typically 3–4 inches thick and 6–12 inches tall, set in a mortar bed along the patio perimeter. The most durable, most attractive, and most cohesive option. Lasts as long as the patio itself. Works for both dry-lay and mortar-set applications. Cost: $12–$22/linear ft installed in Los Angeles.
A poured concrete border 4–6 inches wide and 4–6 inches deep that runs along the patio perimeter. Provides excellent lateral restraint and a clean, low-maintenance edge. Can be tinted or exposed-aggregate finished to complement the stone. More industrial-looking than a stone soldier course. Cost: $8–$14/linear ft installed.
Heavy-gauge steel (typically 3/16" or 1/4" thick, 4–6 inches tall) driven into the ground along the patio perimeter and staked every 24–36 inches. Nearly invisible once installed and the grass or soil covers the stake tops. Highly effective for dry-lay patios. Rusts to a warm brown patina over time (which is considered attractive by many designers). Cost: $4–$8/linear ft installed.
A lighter alternative to steel, available in flexible and rigid profiles. Easier to install on curved patio perimeters. Does not rust, but also does not develop the patina of steel. Less rigid under high soil pressure. Best for smaller patios in stable soil conditions. Cost: $3–$6/linear ft installed.
Larger accent stones or boulders set along the patio edge to create an organic, naturalistic border. Works well in garden and landscape settings rather than formal outdoor living areas. Provides less precise structural restraint but adds significant visual character. Cost varies widely based on stone size and type: $15–$40/linear ft for a composed boulder edge.
The soldier course is the gold standard for natural stone patio edging. Here is how it is installed by Tegula Stone on every flagstone and natural stone paver project in Los Angeles.
Dig a trench along the patio perimeter 8–10 inches deep and 4–6 inches wide to accommodate the soldier course stones plus a mortar base. The trench must be below the frost line (minimal in LA but standard practice) and into undisturbed soil for stability.
Pour or pack a 3–4 inch concrete footing in the base of the trench. This is the foundation that keeps the soldier course from sinking or tipping under soil pressure and foot traffic. Allow to partially set (4–6 hours) before placing stones.
Place matching flagstone or cut stone pieces vertically in the trench on the mortar bed. Set them tightly together, adjusting height to be flush with or 1/4 inch below the finished patio surface. Use a level across multiple stones to maintain consistent height.
Backfill behind the soldier course (the lawn or garden side) with compacted base rock or native soil. Compact in layers to prevent soil settlement from causing the soldier stones to tip outward over time. In expansive clay soil conditions, use a granular backfill rather than native clay.
Fill the joints between soldier course stones with a matching polymer-modified mortar. Tool the joints flush or slightly recessed. This prevents individual stones from tilting and keeps the edge line crisp over time.
Apply a penetrating stone sealer to the soldier course matching the sealer used on the main patio surface. This unifies the appearance and protects the border stones from staining and moisture penetration. Reapply every 3–5 years for best results.
The following prices reflect professional installation costs for common patio edging types in Los Angeles County in 2026. All prices include materials and labor.
Adding edging to an existing patio (retrofit installation) is typically 25–40% more expensive than including it in a new patio installation, due to the need to excavate around already-set stones.
About Tegula Stone: Guides are written and reviewed by independent licensed contractors in the Tegula Stone network. All installation guides are written and reviewed by independent licensed contractors in our network. Request a free consultation.
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