Retaining Wall
Frequently Asked Questions (FAQ)
Do I need a permit or engineer to build a retaining wall?
1
It depends on the height and local building codes. In most municipalities, retaining walls over 4 feet tall (including the buried base layer) require structural engineering plans and a building permit. However, most retaining walls we build are 3 feet tall and do not require a permit.
How do you prevent a retaining wall from leaning or failing over time?
2
The key to a long-lasting retaining wall is proper base prep and drainage. Walls fail primarily due to trapped water weight behind them, not just soil pressure. We build every wall with a compacted gravel footing, install a perforated drain pipe behind the wall, and backfill with crushed gravel rather than dirt. This allows groundwater to drain freely, relieving hydrostatic pressure and preventing shifting, bowing, or leaning.
How long does a professionally built retaining wall last?
3
A properly engineered retaining wall can last 50 to 100+ years. When built with high-quality concrete pavers or natural stone, alongside correct gravel backfilling and drainage, the wall materials themselves will not rot or decay. The key to longevity is preventing water buildup behind the wall.
Can you repair an existing retaining wall?
4
Yes, but it depends on the issue.
Minor Fixes: We can easily replace loose capstones, damaged wood, or cracked veneer.
Bowing or Leaning Walls: If the wall is leaning outward, it usually means poor drainage or soil pressure behind it. Fixing this requires digging out behind the wall, installing proper gravel drainage, and resetting the structure.
We will inspect your wall and let you know if a quick repair will work or if a rebuild is necessary for long-term safety.
What materials do you use to build a retaining wall?
5
We build retaining walls using four primary materials, depending on your budget, structural needs, and aesthetic style:
Segmental Concrete Block Walls: Highly durable, interlocking engineered blocks designed specifically for earth retention. They are cost-effective, long-lasting, and ideal for creating smooth curves or managing significant grade changes.
CMU Block (8x8x16) with Veneer & Cap: Reinforced concrete masonry units (cinder blocks) stacked on a poured concrete footing, then faced with thin stone or brick veneer and finished with a custom wall cap. This provides maximum structural strength alongside a high-end, custom-architectural finish.
Natural Stone Dry Stack: Hand-selected natural stones stacked without mortar, relying on weight, friction, and skilled craftsmanship to hold the earth. This creates a timeless, organic, rustic look that naturally allows groundwater to weep through the joints.
Pressure-Treated Timber/Wood: A budget-friendly, natural option ideal for low-profile garden beds, terracing, or simple yard leveling. While wood has a shorter lifespan than stone or concrete, properly treated timbers provide a warm, rustic aesthetic at a lower initial cost.