FAQ - Coconut Coir Fiber Logs
Coir Log Installation Process
Question: Can you tell me more about the installation of coconut coir fiber logs?
Answer: Thank you for contacting GEI Works. Our Coir Logs (also known as coir rolls) are strong and flexible, designed with a dense web of compact fibers surrounded by an exterior coir mesh netting.
Coir logs aid in the stabilization and revegetation of sites with steep slopes or exposure to waves or currents, which cause instability on a site. The extended longevity (2-4 years) and superior performance of coconut coir fiber products in the field has made it a favorite among landscape architects, contractors, and engineers for erosion control projects of all kinds.
*Optional Instructions for Installing Coir Logs with Plant Seedlings Also Included Below
Installation of Coconut Coir Fiber
- Grade the Shoreline. If the shoreline or streambank that needs restoration is severely eroded, grade the shoreline or streambank according to the natural terrace of the area (2:1 slope is generally recommended). Immediately place an erosion control blanket along the graded slope (refer to blanket installation guide) to prevent erosion.
- Place Coir Rolls: During installation of coconut coir fiber, logs should be placed along the top of the bank where the water level is 1/2 to 2/3 of the coir roll's height. Proper submersion of coir rolls is important to creating a secure environment for new vegitation to grow. Tie the ends of adjacent coir logs together with (6mm) 0.25 inch thick coir twines. Use extra loops of coir twine through the outer netting of adjacent coir rolls. Use of 4" x 2" wooden wedges with a 3-4" nail at the top (4" x 2" x 36") for 12" diameter coir rolls for regular flow and soil conditions is recommended for coir roll installation.
- Placed Wooden Wedges: Place a suitable length wooden wedge at 36 inches (24 inch spacing for high flow conditions) on the waterside if the bank will support the coir rolls on the landside. If the bank does not support the coir rolls, place wooden wedges on the landside as well as on the waterside. Pound the wedges down so that the nail is pressing the coir roll at the top. Tying coir rolls to wedges with several loops of coir twine will provide extra support. Bend the ends of the first and the last coir roll toward the shore and dig them into the bank. This will avoid water getting behind the coir rolls and will prevent pull-out.
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Planting with Coir Logs
Begin planting on the coir rolls after the coir logs have been installed properly. Select plant plugs of the preferred native wetland plants. Plants that are already native to the area are often given preference, as they won't disrupt the natural ecosystem of the surrounding area. If sufficient water is available, place plant plugs into the coir roll by pulling the coir roll fibers apart with the fingers and gently pushing the plug deep into the coir roll.
In situations where the coir logs are away from water, place plants close to the coir rolls, allowing room for the plants to gradually grow into the coir rolls. The recommended spacing for plant plugs is 6 inches.
In case of high density (9 lbs./cu. ft) coir rolls, some planting difficulty may occur. In this situation, be sure to place the plants in soil adjacent to the coir roll.