Between the Brandywine, the Christina, and plenty of rolling hills, Wilmington yards often need help keeping soil exactly where it belongs. That is where properly built brick retaining walls come in. At Superior Masonry Wilmington, we spend a lot of time repairing walls that failed early simply because they were not designed for our local conditions.
If you are considering a new brick retaining wall, or you are worried about one that is already leaning, this guide breaks down what works here in Wilmington, DE, what does not, and what you should expect from a professional installation.
Why brick retaining walls are popular in Wilmington
Brick retaining walls are a natural fit for Wilmington’s older neighborhoods and newer subdivisions alike. They pair well with historic rowhomes near Trolley Square, colonial-style homes in the Highlands, and modern builds on the outskirts of town. Homeowners like them because they:
• Add curb appeal instead of looking “industrial” like bare concrete block. • Can be matched to existing brick on your house, stoop, or steps. • Work well for front yard elevation changes, raised garden beds, and backyard terraces. • Last for decades when drainage and footings are done correctly.
The key phrase is “done correctly.” Our climate is tough on masonry, and shortcuts show up fast.
How Wilmington’s climate affects brick retaining walls
Any retaining wall in Wilmington has to deal with three main challenges:
1. Heavy, soaking rains Our area gets frequent storms that can dump a lot of water in a short time. When water builds up behind a wall because there is no drainage, it creates hydrostatic pressure that pushes the wall forward or causes “bulging.” Over time, mortar joints crack, bricks loosen, and entire sections can fail.
2. Freeze-thaw cycles Wilmington winters bounce above and below freezing over and over. Any moisture trapped in the wall or the soil behind it expands when it freezes and contracts when it thaws. That constant movement works its way into small cracks and turns them into big problems—especially on poorly mixed mortar or soft, low-quality brick.
3. Clay and fill soils Many Wilmington neighborhoods have dense clay or disturbed “fill” soils around foundations and in backyards. Clay swells when wet and shrinks when dry, and loose fill settles over time. If your wall does not have a proper footing bearing on stable soil, it will move with the ground.
Essential components of a long-lasting brick retaining wall
A brick retaining wall that actually stands up to Wilmington weather has more going on beneath the surface than most people realize. Here is what we build into every structural brick retaining wall:
• Proper footing: A reinforced concrete footing below the frost line helps prevent heaving. We size the footing and rebar based on the wall height, soil conditions, and load.
• Correct wall design: For shorter landscape walls, a single wythe (layer) of brick may be enough, often tied to a concrete or block backup. Taller or load-bearing walls typically rely on a reinforced block core with brick as the visible face.
• Weep holes and drainage: We include perforated drain pipes (French drains) behind the wall, gravel backfill, filter fabric, and weep holes through the brick face so water can escape instead of pushing on the wall.
• Quality brick and mortar: For exterior retaining walls, we select durable, exterior-grade brick and a mortar mix suitable for freeze-thaw conditions. Matching the style and color to your existing masonry is part of the design process.
• Expansion and control joints: Masonry expands and contracts with temperature and moisture. Thoughtful placement of joints helps manage those movements and reduces random cracking.
Common retaining wall problems we see around Wilmington
If you already have a brick retaining wall, regular visual checks can catch issues before they become emergencies. Some warning signs we frequently see in Wilmington include:
• Leaning or bowing: Often caused by poor drainage, undersized footings, or saturated soil pushing the wall out.
• Step cracking in mortar joints: Diagonal cracks can signal movement from settling soil or frost heave at the footing.
• Spalling brick faces: When water penetrates brick and freezes, the face can flake off. This is common with low-quality brick or failed waterproofing.
• Efflorescence (white powder): While not always structural, it tells us moisture is moving through the masonry and may indicate a drainage or waterproofing issue.
• Separating from adjacent structures: Gaps between your wall and stairs, porches, or your house can signal footing movement or poor original connections.
In many cases, we can stabilize and repair a failing wall with drainage upgrades, tuckpointing, selective rebuilding, or adding engineered support. In others—especially where safety is a concern—full reconstruction is the better long-term option.
What to expect when Superior Masonry Wilmington installs your wall
When you call Superior Masonry Wilmington about a brick retaining wall, we start with an on-site evaluation. We look at your yard’s slope, soil conditions, nearby structures, tree roots, and where water naturally flows and collects.
From there, we:
• Discuss your goals: Are you looking to level out a backyard for a patio, tidy up a front hill along the sidewalk, or create raised planters? Usage, height, and visibility all guide the design.
• Recommend a wall type and layout: For taller or load-bearing walls, we may suggest a brick-faced reinforced block wall. For decorative garden and boundary walls, solid brick may be appropriate.
• Review drainage and waterproofing: We explain where we will place drain tile, gravel, and weep holes, and how we will guide runoff safely away from your foundation and neighboring properties.
• Provide a clear, written estimate: We break down labor, materials, and any additional work such as tying into existing steps, walkways, or patios.
During construction, you can expect some excavation equipment and temporary disruption, but we keep the site as clean and safe as possible. Once the footing and wall structure are in, we handle finishing touches like caps, steps that tie into the wall, and any adjacent concrete or stone work you would like.
Typical cost factors for brick retaining walls in Wilmington
Every property is different, but several predictable factors influence cost:
• Wall height and length: Taller and longer walls require more engineering, material, and labor. • Access to the work area: Tight city lots or limited side-yard access can slow down excavation and material handling. • Soil and site conditions: Poor or unstable soil may require deeper footings or additional reinforcement. • Brick choice and detailing: Matching historic brick or adding decorative patterns, curves, or integrated steps increases labor time. • Drainage complexity: Areas with heavy runoff or limited space for daylighting drains may need more involved solutions.
We are always transparent about which elements are “must-haves” for safety and longevity and which are design upgrades you can choose based on your budget.
Planning your brick retaining wall project
If you are ready to tackle a slope in your Wilmington yard, the best first step is a site visit from a qualified brick mason. Bring any ideas, photos, or inspiration you have, and be ready to talk about long-term plans for the space—future patios, walkways, or gardens are easier to plan for now than later.
Superior Masonry Wilmington designs and builds brick retaining walls with Wilmington’s specific weather, soil, and neighborhoods in mind. Whether you need a compact garden wall or a multi-terrace system, we focus on drainage, structure, and appearance so your wall looks great and performs well for decades.