Engineered retaining walls built right — proper base, drainage, geogrid, structural block. We fix more leaning walls than we build from scratch because most crews skip the parts you can't see.
A retaining wall in Georgia that doesn't lean, bow, or fail needs: excavation 12" wider than the wall toe, 6–12" of compacted aggregate base on a level shelf, engineered geogrid every 2 vertical courses for walls 4'+, perforated drain pipe with sock and washed gravel backfill, structural blocks (Allan Block, Belgard, Anchor) — not cheap stack stone, and geotextile separation fabric between soil and gravel. Skip drainage and the wall fails in 3–7 years.
Georgia red clay holds water and heaves. A wall built without drainage and geogrid has a 5–10 year lifespan before it leans, bows, or fails. We've replaced dozens of failed walls across Cobb, Cherokee, and Fulton — every single one had skipped drainage, geogrid, or both. Below is exactly how we build walls that last decades in Georgia red clay.
We over-excavate 12" wider than the wall toe and 6–12" deep — wall height drives base depth (6" for 3' walls, 12" for 6' walls). The base is GAB compacted to 95% Proctor in 2-inch lifts. This is the single most skipped step on cheap installs and the #1 reason walls lean within 5 years.
Behind every wall, we place 4" perforated drain pipe (sock-wrapped) running to a daylight outlet, then backfill 12" deep with washed #57 stone wrapped in geotextile separation fabric. Without this, hydrostatic pressure from a Georgia thunderstorm can push a non-drained wall outward by 1–2" per year.
For walls under 3', any structural SRW block (Allan Block, Belgard, Anchor) works. For 3–6' walls we add geogrid every 2 courses tied back into compacted fill. For walls over 6' we engage a Georgia-licensed PE for stamped drawings (required by most counties). Stack stone or non-structural decorative block is for garden borders only — never for retaining structural soil load.
Geogrid is woven polypropylene mesh laid horizontally between block courses and extending 4–6' back into compacted fill. It locks the soil mass and the wall together. On 4'+ walls, skipping geogrid is a guarantee the wall will bow within a decade.
Cap blocks are adhered with construction adhesive. Drain pipe daylights at a low spot or into a 4" downspout adapter. Finish grade is sloped 5%+ away from the top of the wall to prevent pooling. We always tie the top-of-wall grade into existing landscape and re-establish lawn or beds disturbed during build.
| Tier | Typical Cost | What’s Included |
|---|---|---|
| Decorative / garden border (under 2' tall) | $25–$45 per face foot | Single course of structural SRW, no geogrid, basic drainage |
| Standard 2–4' wall | $45–$80 per face foot | Engineered base, drain pipe + gravel, geotextile, geogrid as needed |
| Tall 4–6' wall | $80–$130 per face foot | Geogrid every 2 courses, full drainage, proper backfill compaction |
| Engineered 6'+ wall (PE-stamped) | $130–$220+ per face foot | Stamped drawings, structural fill, possible tiering, permit coordination |
'Face foot' = wall height × wall length. A 4' tall × 30' long wall = 120 face feet × $80/face foot = $9,600 mid-range. We always quote fixed-fee per project.
| Spec | Cheap Wall | LawnLogic |
|---|---|---|
| Excavation depth | Surface only | 12" deep, 12" wider than toe |
| Base material | Native soil | GAB compacted to 95% Proctor |
| Drain pipe | None | 4" perforated, sock-wrapped, daylighted |
| Backfill | Native soil | Washed #57 stone with geotextile |
| Geogrid (4'+ walls) | None | Every 2 courses, 4–6' back |
| Block grade | Decorative stack | Structural SRW (Allan Block / Belgard) |
| Cap adhesion | Loose | Construction adhesive |
| PE stamp (6'+) | Skipped | Always provided |
| Lifespan | 5–10 years before bowing | 30+ years engineered |
Installs since 2013
127+ Google reviews
Year Platinum Warranty
Financing starting at
Decorative under 2': $25–$45/face foot. Standard 2–4': $45–$80/face foot. Tall 4–6': $80–$130/face foot. Engineered 6'+: $130–$220+/face foot. Face foot = wall height × wall length.
Walls over 4' typically require a permit in most Georgia jurisdictions. Walls over 6' require stamped engineering drawings. We handle permit applications and PE coordination as part of the project.
We use structural SRW block — Allan Block, Belgard Highland Stone, Anchor Diamond, depending on the look the client wants. Never decorative stack stone or unreinforced cinder block for structural retaining.
30+ years. Failures we encounter all trace to skipped drainage, missing geogrid, or improper base compaction — not block failure.
Depends on lean severity and root cause. Less than 1" of lean from plumb: often repairable with rebuilt drainage and toe stabilization. More than 2": usually requires teardown and rebuild. We do free assessments.
Yes — drainage is built into every wall (perforated pipe + gravel + geotextile + daylight outlet) and we re-grade above and below the wall to match existing landscape. Most clients combine wall + paver patio + turf — we do all three in-house.
Free site walk, written scope, PE coordination on tall walls. Financing from ~$89/mo on qualifying installs.
Financing from ~$89/mo. 15-Year Platinum Promise on every install.