Installing concrete landscape curbing involves site preparation, concrete mixing, machine extrusion or hand forming, shaping, and curing. Each step affects how long the curbing lasts and how well it holds up through seasonal ground movement. Armor Coating Co. installs decorative concrete curbing with cable reinforcement across Northern Wisconsin, Northern Minnesota, and the Western Upper Peninsula of Michigan.
After years of installing curbing in Northwoods soil conditions, here’s what we’ve learned that most online guides skip: the finished shape is the easiest part of the process. The secret to curbing that lasts twenty winters rather than just one lies in the foundation and the internal structure. Ground preparation, mix consistency, reinforcement, and cure timing all matter more than the decorative profile on top.
This guide walks through the real process from start to finish so you understand what each step is for.
Step 1: Plan the Layout
Walk the intended curbing path and mark it with spray paint or landscape stakes. Curbing follows the contours of the landscape, so the layout needs to account for existing grades, drainage flow, tree roots, and any hardscape it will meet (driveways, walkways, patios).
Planning these details prevent problems later:
- Maintain a 6-inch minimum setback from tree trunks to allow root expansion.
- Route curbing to direct water flow away from foundations, not toward them.
- Mark sprinkler heads and shallow utility lines before any excavation.
- Incorporate gently rounded curves instead of sharp angles.
In Northern Wisconsin and Minnesota, ground frost can shift soil significantly, so planning for gentle curves rather than sharp angles improves the curbing’s ability to flex with seasonal movement.
Step 2: Prepare the Ground
Remove grass, weeds, and loose debris along the marked path. Excavate a shallow trench 3 to 4 inches deep and roughly the width of the intended curbing profile. The goal is a firm, level base of compacted soil.
Soil composition matters here. Clay-heavy soils common in parts of Duluth and the Northwoods retain moisture and expand when they freeze. A thin layer of compacted gravel (1 to 2 inches) in the trench base improves drainage beneath the curbing and reduces the heaving that frost causes. This step gets skipped in many DIY installations and is one of the primary reasons curbing cracks in its first winter.
Step 3: Mix the Concrete
The concrete mix for landscape curbing needs to be stiffer than what you’d pour into a form. A standard curbing mix uses a ratio of approximately 3 parts sand, 1 part Portland cement, and enough water to reach a stiff, moldable consistency that holds its shape when squeezed. The mix should not slump or run.
Fiber reinforcement (polypropylene fibers mixed into the batch) adds tensile strength and reduces surface cracking. In colder climates, the fiber reinforcement is especially valuable because it helps the curbing resist the micro-cracking that freeze-thaw cycles cause. Our DIY concrete curbing guide covers mix details and common mistakes in more depth.
Step 4: Extrude or Hand-Form the Curbing
Professional curbing installations use an extrusion machine that feeds the concrete mix through a shaped hopper, producing a continuous ribbon of curbing in the chosen profile (slant, mower-edge, square, or decorative). The machine runs along the prepared trench and the curbing takes shape as it’s extruded.
For hand-formed sections (around corners, tight curves, or decorative features), the same mix is packed by hand using trowels and shaping tools. Hand forming requires more time and skill but allows for custom transitions and profiles that a machine can’t produce.
Armor Coating Co. uses cable reinforcement through the core of every curbing run. The steel cable runs continuously inside the extruded profile, adding structural integrity and holding the curbing together if ground movement causes a crack. Cable reinforcement is what separates professional installations from most DIY approaches.
Step 5: Shape, Stamp, and Detail
Immediately after extrusion, the curbing surface is finished. Stamp patterns (brick, flagstone, cobblestone) are pressed into the wet concrete. Edges are cleaned with a detailing trowel. Expansion joints are cut at regular intervals to control where cracking occurs if the ground shifts.
Timing is critical at this stage. The concrete needs to be firm enough to hold the stamp impression but wet enough that the pattern transfers cleanly. In the warmer months across Northern Wisconsin, direct sun can accelerate surface drying and narrow this window. Experienced installers adjust their pace and water management based on conditions.
Step 6: Cure and Seal
Fresh curbing needs a minimum of 24 to 48 hours of curing before foot traffic and several days before heavy contact. A concrete sealer applied after curing protects the surface from moisture penetration, UV exposure, and staining. Sealed curbing holds its color longer and resists the surface scaling that unsealed concrete develops after a few freeze-thaw seasons.
In this region, the sealer isn’t optional. Unsealed curbing in Northern Minnesota or Wisconsin absorbs moisture, and that moisture freezes and expands through winter. Within a few seasons, the surface often begins to flake and deteriorate. A quality acrylic or polyurethane sealer applied at installation and reapplied every two to three years keeps the curbing looking and performing the way it did at installation.
Frequently Asked Questions
How long does concrete landscape curbing last?
Professionally installed concrete curbing with cable reinforcement and proper sealing can last decades with regular maintenance. The primary threats to longevity in Northern Wisconsin and Minnesota are freeze-thaw cycling and ground heave, both of which are managed through proper base preparation, reinforcement, and regular resealing.
Can I install concrete curbing myself?
DIY curbing is possible with hand-forming techniques and rental extrusion equipment. The results depend heavily on mix consistency, ground preparation, and cure management. Most DIY installations lack cable reinforcement and compacted gravel base preparation, which reduces durability in freeze-thaw climates. A professional installation typically lasts significantly longer.
When is the best time of year to install curbing in Northern Wisconsin?
Late spring through early fall, when daytime temperatures consistently stay above 50 degrees Fahrenheit. Concrete needs adequate temperature to cure properly. Installations done too late in the season risk curing in temperatures that slow the hydration process and weaken the finished product. Armor Coating Co. schedules curbing projects during the optimal window for the region.
Build Borders That Last in Northern Climates
Every step in this process exists to solve a specific problem: ground prep prevents heaving, cable reinforcement prevents separation, proper mix prevents cracking, and sealing prevents surface deterioration. Skipping any of them shortens the curbing’s life. Homeowners across Hayward, Spooner, Duluth, and the surrounding area can request a free curbing consultation to discuss layout options and pricing. Call (715) 934-9037.
I’m Chad Nicks, owner of Armor Coating Co. My team and I offer high-quality, durable concrete coatings in Duluth, MN, and Northern Wisconsin. With innovative products four times stronger than epoxy, our family-owned business provides lasting solutions for both residential and commercial spaces.
Email: chad@armorcoatingco.com
Facebook: https://www.facebook.com/ArmorCoatingCompany
Instagram: https://www.instagram.com/armorcoatingco/