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Capillary Edge - Specifications and Installation instructions

Capillary Edge - Specifications and Installation instructions

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Planning and construction of the bunker edge

The edge detail of a bunker is often what gives it its distinctive style. The Capillary Material has properties that allow it to be molded to align with any architect’s bunker design. Preserving the desired style and integrity of the bunker while minimizing ongoing maintenance is crucial for the success of any restoration and renovation plan.

Installation of Capillary Edge

Our Capillary Edge ensures an exact bunker shape and minimizes contamination while also improving grass quality and wear tolerance outside the bunker edge. A special artificial turf strip is placed on the edge and tied in with Capillary Material, along with an impermeable liner beneath to collect and moisten the soil outside the edge. This not only saves maintenance crews many hours of edging but also creates a sharp and tidy edge that looks incredible with healthy grass outside for many years to come, while ensuring the preservation of the exact original bunker shapes.
Capillary Edge is delivered on rolls, making it easy to roll out and fit to your bunker shape.

How to prepare the artificial turf strip

Concave (Bay) bunker shape

The artificial turf strip is pre-prepared to be installed in a bay bunker shape. If the bunker is in this specific shape, no additional preparations are required for the artificial turf strip. The default cuts are sufficient to fit a bay-shaped bunker.

View of the Capillary Edgefrom above when fitted toa bay or nose bunker shape

Convex (Nose) bunker shape

When installing the Capillary Edge in a convex (Nose) bunker shape, slight modifications and preparations need to be made to the artificial turf strip. Depending on the bunker's shape and the sharpness of the turn, different sizes of the cutouts are needed. Please consult with your CapillaryFlow representative before installation if you are uncertain about the number and angle of the V-shaped cutouts.

Note: Cut only the part of the strip that is facing the bunker curved shape

  1. Cut a V with a sharp-edged knife or scissor
  2. Cut additional V’s all the way through the rounded part where the strip is installed
  3. Repeat the process for all Nose bunker shapes where you are installing Capillary Edge

View of the Capillary Edge from above before installing and fitting it to a nose bunker shape


1. Preparations

Prepare the Capillary Bunker and Material: Finish the top perimeter of the Capillary Bunker installation, ensuring a flat and level surface that creates a shelf level with the soil base outside the bunker, approximately 8-12 inches wide.

The Capillary Edge is best installed while the Capillary Material in the bunker liner is still uncured for two primary reasons. First, once the Material has cured, driving pegs or stakes into the Edge for securing it becomes extremely difficult. Second, delaying the process might lead to limited access to additional Capillary Material the following day, potentially resulting in extra costs for small quantities or the inconvenience of on-site mixing. Therefore, we recommend installing the Edge simultaneously with the Liner.

Please note: Walking on the Material in the bunker before it is fully cured is strictly prohibited, as it can compress the Material and impair its functionality. If you choose to install the Edge at the same time as the Liner, ensure this is done from outside the bunker to prevent any damage to it.

2. Install the Capillary Edge

Place the Capillary Edge on the shelf with the side featuring artificial grass facing towards the bunker and with a 30mm overhang into the bunker. Ensure the grass is facing upwards and the Capillary Edge extends 1 inch inside the bunker edge for consistency.

3. Secure the Edge

If necessary, use thin nails or sod staples to attach the Capillary Edge to the base material in the soil part of the ledge. Then, secure the Capillary Edge further by filling voids behind it with Capillary Material, leveling it with the top of the Edge to stabilize the structure. If you have used multiple layers of the Edge (i.e >2), you can use some dirty sand (mixed with soil) to backfill behind the Capillary Edge. Rather than just using Capillary Material, it will help with natural turf rooting once sod is installed.

4. Finishing Touches

Depending on the desired aesthetic, finish with a natural grass sod layer to integrate with the surrounding grass. For a more robust edge, place the first layer of sod upside down and the second layer right side up, or add soil to create a rolled-over look, locking in the backing of the Capillary Edge.

5. Final Adjustments

After reaching the desired height and look, add additional soil and sod as needed to ensure the bunker edge is well-integrated with the adjacent turf and to meet any specific architectural requirements of the golf course design.

6. End result

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