How To Pour Concrete Curbing in Your Yard: A Step-by-Step Guide

Step 1: Planning and Layout

1. Design Your Curbing: Decide on the path and shape of your curbing. Mark the path with spray paint or a garden hose.
2. Measure and Mark: Use a measuring tape and string line to precisely mark the width and height of your desired curbing. Most landscape curbing is 4-6 inches wide and 4-6 inches tall.

Step 2: Prepare the Trench

1. Dig the Trench: Dig a trench along your marked path. The trench should be slightly wider than your curbing forms and deep enough so that the top of the form is at your desired finished curb height. Ensure the bottom of the trench is level and compacted. For improved stability in freeze-thaw climates, consider adding and compacting a thin gravel base before setting forms.
2. Remove Debris: Clear any rocks, roots, or other debris from the trench.

Step 3: Set the Forms

1. Install Forms: Place your flexible curbing forms into the trench, following your marked path. Secure them with stakes every 2-3 feet, tapping the stakes firmly into the ground with a rubber mallet. Ensure the top edge of the forms is level and at the desired height.
2. Connect Forms: If using multiple sections, connect them securely according to the manufacturer’s instructions.
3. Add Reinforcement (Optional): If using rebar or wire mesh for added strength, place it in the center of the trench before pouring the concrete, ensuring it’s elevated slightly off the ground using small rebar chairs or stones.
4. Place Expansion Joints: For long, continuous runs of curbing (typically every 8-12 feet), insert expansion joints. These flexible strips will absorb movement and prevent cracking due to temperature changes.

Step 4: Mix and Pour the Concrete

1. Mix Concrete: In a wheelbarrow or concrete mixer, combine your concrete mix with water according to the manufacturer’s instructions. The consistency should be like thick oatmeal: wet enough to be workable but not too watery. Avoid mixing too much at once, as concrete sets quickly.
2. Pour Concrete: Carefully pour the mixed concrete into the forms, filling them completely. Work in small sections.
3. Consolidate: Use a trowel or a piece of rebar to gently tap the sides of the forms and vibrate the concrete. This helps remove air pockets and ensures the concrete fills all voids.

Step 5: Shape and Finish the Curbing

1. Rough Leveling: Use a straight edge or a piece of wood to screed off excess concrete, leveling the top surface of the curb with the top of the forms.
2. Initial Shaping: After the concrete has begun to stiffen slightly (when the surface water has evaporated), use a concrete edger to round the top edges of the curb. This creates a smooth, finished look and helps prevent chipping.
3. Smooth the Surface: Use a hand trowel to smooth the top and sides of the curb. For a textured finish, you can use a broom or a specialized stamp.

Step 6: Curing and Sealing

1. Cure the Concrete: Concrete needs to cure slowly to achieve maximum strength. Keep the concrete moist for at least 3-7 days by covering it with plastic sheeting, burlap, or by misting it with water periodically. Avoid heavy traffic or placing objects on the curb during this time.
2. Remove Forms: Once the concrete has sufficiently hardened (usually after 24-48 hours, depending on conditions), carefully remove the forms.
3. Apply Sealer: After the concrete has fully cured (typically 7-28 days), apply a high-quality concrete sealer. This will protect the curbing from moisture, stains, and the elements, extending its lifespan and maintaining its appearance. For superior protection, consider a professional-grade sealer.

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