Concrete curbing is a fantastic investment in your landscape’s beauty and functionality. Its durability, aesthetic appeal, and low maintenance make it a popular choice for defining garden beds, pathways, and driveways. However, even the most robust concrete can show signs of wear over time, especially when exposed to the challenging climate of Duluth, MN, Northern Wisconsin, and the Twin Ports region.
Armor Curbing Co.’s concrete curbing installations are built to last, but we also believe in empowering homeowners with knowledge. This guide will walk you through common concrete curbing repair problems, offer practical DIY solutions for minor issues, and help you determine when to consult experts like us for more significant damage.
Common Concrete Curbing Problems and Their Causes
Before diving into solutions, it’s helpful to understand why certain problems occur:
1. Hairline Cracks
These are typically superficial and often result from the natural curing process of concrete or minor ground movement. In our climate, small hairline cracks can also appear due to thermal expansion and contraction.
2. Larger Cracks or Fractures
More significant cracks, especially those that run deep or span across the curb, often indicate more substantial issues. These can be caused by severe frost heaves, significant ground settlement, heavy impact (e.g., from vehicles or lawn equipment), or improper installation techniques that didn’t account for local soil conditions.
3. Spalling or Flaking
Spalling refers to the deterioration of the concrete surface, where small pieces flake off. This is commonly caused by repeated freeze-thaw cycles, especially if the concrete mix was not properly air-entrained or if de-icing salts are frequently used nearby. Poor drainage can also contribute to moisture saturation and subsequent spalling.
4. Shifting or Uneven Sections
If sections of your curbing appear to have moved, lifted, or become uneven, it’s usually a sign of ground instability. This can be due to frost heaves, tree root growth, or inadequate ground preparation during installation. Shifting can compromise the integrity of the entire curbing system.
5. Discoloration or Stains
While not a structural issue, discoloration can detract from your curbing’s appearance. This can be caused by algae, mildew, rust, or chemical spills. Regular cleaning and proper sealing can prevent most stains.
Easy DIY Solutions for Minor Concrete Curbing Repair
For small, non-structural issues, a DIY approach can save you time and money. Always ensure you have the right safety gear, including gloves and eye protection, before starting any repair.
1. Repairing Hairline Cracks
Clean the Area: Thoroughly clean the crack and surrounding concrete with a wire brush and then rinse with water. Ensure it’s dry before proceeding.
Apply Concrete Crack Filler: Use a high-quality concrete crack filler or sealant designed for outdoor use. Apply it directly into the crack, smoothing it with a putty knife. Choose a color that closely matches your existing curbing. Allow it to cure according to the manufacturer’s instructions.
2. Addressing Minor Spalling
Clean and Prepare: Remove all loose, flaking concrete with a wire brush or chisel. Clean the area thoroughly. For deeper spalling, you might need a concrete bonding agent.
Apply Concrete Patching Compound: Mix a small batch of concrete patching compound according to the instructions. Apply it in thin layers, building up the area to match the existing surface. Use a trowel to smooth and blend the patch. Keep the patch moist for the first few days to ensure proper curing.
3. Removing Discoloration and Stains
General Cleaning: For dirt, algae, or mildew, a pressure washer with a mild detergent can be very effective. For stubborn stains, a specialized concrete cleaner may be necessary. Always test cleaners on an inconspicuous area first.
Resealing: After cleaning, consider resealing your curbing every 2–3 years. A good quality concrete sealer protects against moisture penetration, UV damage, and staining, keeping your curbing looking new.
When To Call the Professionals at Armor Curbing Co.
After installing and servicing concrete curbing across Northern Minnesota and Wisconsin for years, we’ve seen which minor issues homeowners can safely handle and which ones require professional repair to prevent recurring damage.
While DIY solutions are great for minor cosmetic issues, some problems require the expertise and specialized equipment of professionals. It’s always best to contact Armor Curbing Co. if you observe:
Large, Deep, or Widening Cracks
These often indicate underlying structural problems that DIY fixes cannot adequately address. Our team can assess the cause and implement a lasting solution, potentially involving section replacement or advanced repair techniques.
Significant Shifting or Unevenness
If your curbing has noticeably shifted or become uneven, it suggests issues with the sub-base or severe frost heaves. Attempting to fix this yourself could cause further damage.
Extensive Spalling
Widespread spalling might indicate a compromised concrete mix or severe drainage issues. Our professionals can diagnose the root cause and provide a comprehensive repair or replacement plan.
Damage From Tree Roots
Tree roots can exert immense pressure, causing curbing to lift or crack. We can safely remove the offending roots and repair the curbing without harming your trees or landscape.
From Minor Fixes to Major Repairs, We’ve Got You Covered
Regularly inspecting your concrete curbing is a simple yet effective maintenance practice. Look for small cracks, discoloration, or any signs of movement. Addressing these promptly can extend the life of your curbing and maintain your landscape’s pristine appearance. For minor cosmetic issues, a DIY approach can be effective, but for structural concerns, professional intervention is often necessary.
Armor Curbing Co. is committed to providing durable, beautiful concrete curbing solutions that enhance your landscape for decades. As a professional concrete curbing contractor serving Duluth, MN, Northern Wisconsin, and the Western UP of Michigan, we also provide expert repair and replacement services when DIY solutions aren’t enough.
Send us a message or call us at (715) 934-9037 for a free consultation. Let us assess the condition of your curbing and recommend the best course of action to restore its beauty and functionality.

