Woven Coir Fabrics

KoirMat™ 400, 700, 900 & 1000

Overview

Nedia offers a full line of 100% natural woven coir (coconut fiber) erosion control fabrics. Our line of products in this category includes

KoirMat is made from well cleaned, high strength, fresh water cured coconut fiber. Coconut fiber is extracted from coconut husks which are submerged in fresh water streams or storage tanks for a period of several months. During this process known as retting, water constantly flows through the coir fiber matrix removing impurities present in the fiber. The clean fiber is extracted and spun into yarn which is then woven into KoirMat.

KoirMat erosion control matting is highly versatile with a wide array of applications in bioengineering and erosion control. KoirMat by far exceeds the demand for an environmentally friendly and economic erosion control product.

Benefits:

Coir fiber has one of the highest durability and tensile strengths among all natural fibers. The high lignin content (46% by weight) of KoirMat makes it naturally resistant to mold and rot and hence requires no chemical treatment.

KoirMat naturally absorbs and retains water while retaining its integrity providing an ideal microclimate for the growth of vegetation. KoirMat resembles the soil in its ability to absorb solar radiation to prevent overheating – a problem with many synthetic materials. The natural color of KoirMat makes it aesthetically pleasing. After years of effective erosion control and vegetation anchoring, KoirMat decomposes and joins the natural ecological cycle, providing soil nutrients in the process .Environmentally safe and biodegradable, KoirMat is the preferred choice of erosion control specialists around the world.

Longevity:

Depending on its application and exposure, KoirMat lasts three to six years. This extended longevity period allows enough time to establish adequate vegetation allowing erosion control the way nature intended.

WOVEN COIR FABRICS – KoirMat 400, 700 900, & 1000

Typical Applications

  • Highway and Rail Embankments
  • Slope and Channel Stabilization
  • Wetland Construction
  • Mining Operations and Landfills
  • Stream and River Banks Stabilization
  • Construction Sites
  • Tidal Marshes
  • High Altitude Planting
  • Golf Courses
  • Detention Ponds
  • Ski Slopes and Ski Lift Tracks
  • Dams & Reservoirs

INSTALLATION GUIDELINES FOR WOVEN COIR FABRICS – KoirMat 400, 700, 900 & 1000

Site Preparation:

Grade and shape the area of installation. If applicable, prepare seedbed by loosening 2” to 3” of topsoil. Application of lime and mixed grade fertilizer is recommended prior to seeding and installation of blankets & mattings. Make sure soil is free of clods, rocks, wood and other obstructions so that the blankets & mattings are in direct contact with soil.

Seeding:

In most cases, it is recommended that seeding be done prior to installation of blankets. For turf reinforcement mat and open weave matting, seeding is often done after matting installation. Best results are achieved when a veneer of soil is raked over the broadcast seeded surface. Straw or hay mulch may be added after seeding. All check slots and other areas disturbed during installation process should be re-seeded

Anchoring:

U-shaped metal staples (11-gauge minimum, 6” to 12” long) or wooden stakes (at least 12” long) can be used to anchor blankets to the ground. Keep a minimum edge distance of 2” from the edge of the blanket to the center of the staples or stakes

Site Preparation:
Grade and shape the area of installation. If applicable, prepare seedbed by loosening 2” to 3” of topsoil. Application of lime and mixed grade fertilizer is recommended prior to seeding and installation of blankets & mattings. Make sure soil is free of clods, rocks, wood and other obstructions so that the blankets & mattings are in direct contact with soil.

Seeding:
In most cases, it is recommended that seeding be done prior to installation of blankets. For turf reinforcement mat and open weave matting, seeding is often done after matting installation. Best results are achieved when a veneer of soil is raked over the broadcast seeded surface. Straw or hay mulch may be added after seeding. All check slots and other areas disturbed during installation process should be re-seeded

Anchoring:
U-shaped metal staples (11-gauge minimum, 6” to 12” long) or wooden stakes (at least 12” long) can be used to anchor blankets to the ground. Keep a minimum edge distance of 2” from the edge of the blanket to the center of the staples or stakes

Installation on Slopes

  • Grade soil, fertilize and seed as per general guidelines below.
  • Begin at the top of the slope and anchor blankets in a 12” deep and 12” wide initial anchor trench (see Fig.2) and anchor with staples at 18” spacing.
  • Unroll blanket down slope in the direction of the water flow (see Fig.1). The blanket should not be stretched but should have full contact with the soil. Anchor blanket using staples or stakes. See “Staple Pattern Guide for Slopes” below.
  • Overlap edges of adjacent parallel rolls by approximately 6” and anchor with staples at 24” to 36” spacing depending on the slope.
  • When blankets have to be spliced, place upper blanket end over lower blanket end (shingle style) with 12” overlap and anchor with two staggered rows of staples at 12” spacing.
  • Anchor, fill and compact ends of blankets in 12” deep and 6” wide terminal anchor trench. Anchor with staples at 18” spacing.

Staple Pattern Guide for Slopes

Site Preparation:
Grade and shape the area of installation. If applicable, prepare seedbed by loosening 2” to 3” of topsoil. Application of lime and mixed grade fertilizer is recommended prior to seeding and installation of blankets & mattings. Make sure soil is free of clods, rocks, wood and other obstructions so that the blankets & mattings are in direct contact with soil.

Seeding:
In most cases, it is recommended that seeding be done prior to installation of blankets. For turf reinforcement mat and open weave matting, seeding is often done after matting installation. Best results are achieved when a veneer of soil is raked over the broadcast seeded surface. Straw or hay mulch may be added after seeding. All check slots and other areas disturbed during installation process should be re-seeded

Anchoring:
U-shaped metal staples (11-gauge minimum, 6” to 12” long) or wooden stakes (at least 12” long) can be used to anchor blankets to the ground. Keep a minimum edge distance of 2” from the edge of the blanket to the center of the staples or stakes

Installation in Channels

  • Grade soil, fertilize and seed as per general guidelines below.
  • Dig a 12” x 12” initial anchor trench at the upstream end (see Fig.4). If there is concentrated flow at channel entrance, it is recommended that the initial anchor trench be made at least 12” upstream from the pipe opening. It is also recommended to adopt measures to reduce the velocity of flow at pipe opening.
  • Dig intermittent check slots (6” deep and 6” wide) across the channel at 25’ to 50’ intervals depending on the slope gradient of the channel (see Fig.5).
  • Dig 6” deep and 6” wide longitudinal trenches at the top of side slopes to anchor the blanket edges (see Fig.6).
  • Dig 12” deep and 12” wide terminal anchor trench at downstream end (see Fig.7).
  • Install the first blanket in the initial anchor trench, upstream, in the center of the channel and anchor with two staggered rows of staples at 6” spacing, backfill and compact.
  • Do not stretch but make sure there is full contact between blanket and soil.
  • In the same manner, position adjacent blankets in the initial anchor trench overlapping the preceding blanket a minimum of 8” and anchor.
  • Unroll center strip downstream.
  • Unroll adjacent mats downstream in a similar fashion, maintaining an 8” wide overlap. Anchor the overlapped area with staples at 16” to 18” spacing depending upon the flow velocity.
  • For anchoring the middle of the blankets see “Staple Pattern Guide for Channels” below.
  • Secure the edges of the blankets along the longitudinal trenches on the top of slopes with staples at 12” centers (see Fig.6).
  • Fold and secure the matting snugly into all transverse check slots. Lay the matting in the bottom of the slot and then fold back against itself. Anchor through both layers of blanket at 6” intervals then backfill and compact soil (see Fig.5).
  • For noncritical installations, place two staggered rows of staples at 6” spacing in lieu of check slots.
  • When blankets need to be spliced, place upstream blanket over the downstream blanket with an overlap of at least 12”. Use two staggered rows of staples at 6”spacing.
  • Anchor, fill and compact downstream end matting in terminal anchor trench (see Fig.7).

Staple Pattern Guide for Slopes

©2022 Nedia Enterprises, Inc. All Rights Reserved. Unauthorized use of image and content strictly prohibited.