Corten steel edging is the preferred choice for landscape designers and property owners alike. Its distinctive weathered patina lends a contemporary industrial charm to any garden, while its exceptional durability means clean cut lines and crisp spatial qualities remain in place for decades. However, in addition to aesthetic considerations, successful installation also depends on one crucial question: How Deep Should Corten Steel Edging Be Installed? The answer is simpler than you think: aim to bury one-third to one-half of the strip's height.
With this article, we provide a comprehensive step-by-step guide, taking you from initial planning through to professional finishing touches. We not only address the basic question of installation depth but also offer professional advice to make sure your project looks stunning and will last for years to come.
With this article, we provide a comprehensive step-by-step guide, taking you from initial planning through to professional finishing touches. We not only address the basic question of installation depth but also offer professional advice to make sure your project looks stunning and will last for years to come.
Why Choose Corten Steel for Landscape Edging?
Before we get started with the installation, let's take a look at why Corten steel is an excellent choice for landscaping projects.
Durability and Strength
Corten steel edging is built to last, unlike wooden or plastic edging that can easily crack, rot, or fade. Its unique chemical composition helps form a protective, stable rust coating (also known as patina) that protects against further corrosion. With this self-healing process, these metal edgings can withstand the harshest weather conditions, from extreme heat to bitter cold, without damage. This allows it to be a truly “set-and-forget” solution, delivering extraordinary added value and confidence for homeowners.
Modern Industrial Aesthetics
Corten steel's patina develops rich, natural shades that create striking visual contrasts against luscious lawns, vibrant flowerbeds, or brilliant gravel paths. Clean, crisp lines impart a contemporary minimalist style to gardens, delineating spaces and fostering a neat, professional appearance. It is the desired material for those pursuing modern aesthetics while maintaining a warm, organic appearance.
Planning Your Corten Steel Edging Project
Proper planning is key to a smooth and successful installation. Before commencing excavation, take the time to prepare thoroughly.
Required Tools and Materials
• Corten Steel Edging: Select the appropriate height and thickness for your project.
• Connecting Plates or Clamps: For connecting edging strips.
• Installation Pins or Nails: For securing the edging.
• Measuring Tape: For precise measurements.
• Shovel or Trowel: For digging trenches.
• Rubber Mallet: For gently tapping edges into the ground.
• Spirit Level: To ensure edges are level and parallel to the ground.
• Gloves and Safety Goggles: For personal protection.
• Angle Grinder or Metal Shears: For cutting edging if required.
Calculating the Amount of Edging Required
Measure the dimensions of the area you wish to enclose, and allow for some extra space to cover the joints. Bear the height of the edging in mind, as this depends on its intended use. Taller garden edging is ideal for securing soil in flowerbeds, while lower edging is suitable for defining the edges of lawns.
Step-by-Step Installation Guide of Corten Edging
Now, let us move on to the most crucial part of this process.
Step 1: Mark Plan and Dig Trench.
First, use string or marking paint to outline the boundary lines. This will help visualise the final layout. Then, dig a trench around the marked lines. The trench should be a little wider than the border tape to allow for adjustment.
How Deep Should the Trench Be? (Rule: 1/3–1/2)
The most important question. A good rule of practice is to bury 1/3 to 1/2 of the tape's total height underground. For example, if using 150mm (6-inch) high Corten steel garden edging, it should be buried 50 to 75mm (2-3 inches) deep. This depth ensures the edging remains stable, preventing displacement over time due to soil movement or foot traffic.
Expert Advice:
The deeper the edging is buried, the greater its stability. In busy traffic areas or to prevent root encroachment, burying half the edging below ground is recommended.
Step 2: Position and Connect the Strips
Carefully place the first strip into the trench. Use a survey level to ensure it is straight. When adding the next strip, place it over the first and secure the joint using the accompanying connecting plate or clamp. This creates a seamless, stable barrier.
Step 3: Install Fixing Pins and Backfill the Trench
Secure the edging strips to the ground using connecting pins. Drive the connecting pins into the ground at intervals of 3-5 feet (1-1.5 metres) along the trailing edge of the borders, or as per the manufacturer's instructions. Subsequently, backfill the trench, compacting the soil on both sides of the border to secure the fencing in position.
Step 4: Final Adjustments and Tidying
After securing the borders, perform final adjustments to ensure the top edging is level and straight. Remove any excess soil to prepare the ground for landscaping.
Pro Tips for a Perfect Installation
Handling Curves and Angles
• Creating Smooth Curves: Slowly and carefully press the flexible tape to conform to the desired line.
• Handling Sharp Curves or Right Angles: Use pre-formed corner pieces, or cut small V-shaped notches into the edge with an angle grinder.
Managing the Rust Run-Off During Curing
When the new Corten steel edging is first exposed to weather conditions, it will begin to rust. During this initial stage of weathering (which may last several months), rust may stain the surrounding concrete or surfacing. To prevent staining, it is advisable to place protective sheeting or cardboard near the surface until the rust layer has stabilised.
One of the most captivating characteristics of this material is its transformation process. Although it originally exhibits a bright orange hue, it gradually evolves into a deep brown with time, developing a beautiful patina that is a symbol of the material's durability and longevity.
Long-Term Care and Cleaning
There is no need for special cleaning of the edging itself; a simple wash with water will remove dirt and debris. With a natural protective layer formed by the stable green coating, there is no need for painting, sealing, or rustproofing.
Conclusion: Frame Your Outdoor Spaces with Corten Steel Edging
Following these instructions will enable you to safely install Corten steel edging, creating an attractive, durable, and long-lasting component that will enhance your garden for years to come.
