Installation procedure

1. Grade the streambank to the desired level of gradient. The surface of the soil should be smooth and free of rocks, roots and other obstructions. Before placing the selected blanket, evenly apply lime, fertilizer, and suitable mix of seeds. Blanket will hold the seeds in place and support germination and seedling growth.
2. Start installing the blanket from the top of the streambank by anchoring the blanket in a 6 in deep and 6 in wide anchor trench. Place the blanket, backfill and compact (Fig. 1A).
3. Roll the blankets down the slope (recommended) or across the slope, if necessary. Anchor the open blanket edge using one row of suitable anchors (metal staples or pine pegs) at 1.5 - 2 feet intervals. The middle of the blankets should be anchored using the suitable staple spacing according to the steepness of the streambank (Table 1). Always place anchors in a staggered pattern.. Be sure to lay blankets loosely on the ground allowing a good contact between the soil and blanket.
4. When blanket splicing is necessary, overlap blankets at least 8 inches. The up slope blanket should be on the top. Use two rows of staples with a staggered pattern to anchor blanket joints (Fig. 1B). Overlap sides of blankets at least 6 in and use anchors along the overlap at 12 in spacing (Fig. 1C).
5. At the bottom of the streambank, the blanket edge should be anchored to the ground properly with a 6 in deep and 6 in wide anchor trench at the toe. Place a suitable diameter coir log (roll) over the blanket at the toe and install the coir logs with at least pine wedges with a nail at the top. See the guide below. For regular flow conditions, use wedges every 3 ft. Wedges should be installed from the water side to place the log at the toe. Drive the wedge all the way down till the nail is pressing the coir log well. Longer wedges may require for very soft soil conditions.
6. Tie the ends of adjacent coir rolls together with (6mm) 0.25 inch thick coir twines (BioD-Twine). Use extra loops of coir twine through the outer netting of adjacent coir rolls.Use metal staples of gauge 11 to anchor blankets. Recommend using 6 in (minimum) long staples for temporary blanket types and 8 in (minimum) long staples for semi-permanent and permanent mats. If wooden pegs are used, the minimum length should be 12 inches. Anchors should be long enough to provide a strong bond between the blanket and the ground. Required anchor length may vary depending on the soil condition. Sandy soils may require longer anchors.
7. This procedure should be altered to specific site conditions at the discretion of the site engineer / architect.

Tips for effective restoration:

• Always install dry coir rolls and plant suitable native plants for economical and effective restoration.
• Never drive stakes through the coir logs.
• Use 10 ft long coir logs for easy handling and shipping.
• For stronger support, use high density (9 lbs/cu. ft) coir logs.