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EnquireCoir wattle
Contour lines on slopes, cut faces and embankments
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04 · Wattles & Silt Fences
Stop silt where it starts
Coir wattles are rolls of coir fibre in netting, laid across a slope along the contour. Each one breaks up the water running down the slope, slowing it and letting the silt it carries settle out behind the roll.
Natural-fibre silt fences do the same job at the edge of a site: set upright on stakes around perimeters and drains, they hold sediment back while water passes through. Both are supplied to your project requirements.
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Why it works
What wattles and silt fences do on site.
Slows Runoff
Breaks long slopes into short runs so water loses speed.
Keeps Silt on Site
Sediment settles behind the barrier instead of leaving the site.
Follows the Contour
Flexible rolls bend to follow the shape of the slope.
Simple to Install
Set in a shallow trench and staked in place by hand.
Plant-Friendly
Seed and plants can establish in and behind the fibre.
Returns to the Soil
Natural fibre that breaks down after the job is done.
Specifications
Product Specification
Coir wattles and natural-fibre silt fences are made to the site. These are the usual starting points.
| Property | Coir wattle |
|---|---|
| Fill | 100% coir fibre |
| Netting | Coir twine |
| Diameter | From 20 cm (8″); larger to project |
| Lengths | 3 to 6 m; other lengths to project |
| Silt fence height | To site requirement |
| Packing | Labelled by size and lot number |
Quality on record
Tested lot by lot, independently
We sample each production lot and send it to an independent laboratory. These are the properties measured, the method used, and what each one tells you. The report carries the lot number printed on your labels and travels with the shipment.
- 01
Central Coir Research Institute
Coir Board, Kalavoor, Alappuzha, KeralaThe Coir Board’s research institute and coir geotextile laboratory, set up to test to ASTM methods and recognised by BIS for coir bhoovastra work.
- 02
NABL-accredited laboratories
ISO/IEC 17025 accredited, IndiaIndependent textile and geosynthetics laboratories accredited by India’s National Accreditation Board for Testing and Calibration Laboratories.
- 03
Your nominated inspector
Pre-shipment, on requestInspection and sampling by an agency you appoint before the container is sealed.
| Property tested | Method | What it tells you |
|---|---|---|
| Diameter and length | Measured per lot | Logs match the size ordered |
| Weight per metre and fill density | Measured per lot | Firmness of the fill, set to the water conditions |
| Netting mesh size | IS 15868 | Netting holds the fill and lets roots through |
| Netting yarn breaking load | Yarn tensile test | Strength of the netting that holds the log together |
| Moisture content | Oven-dry method | Fibre is shipped dry and stable for transit |
Compare
Spacing on slopes
Typical spacing between wattle rows for ~20 cm rolls. Steeper slopes need rows closer together; soft, loamy soils closer still.
| Property | Spacing between rows |
|---|---|
| 1V:1H slope | About 3 m |
| 1V:2H slope | About 6 m |
| 1V:3H slope | About 9 m |
| 1V:4H or flatter | About 12 m |
How coir wattles compare
| Property | Coir wattle | Straw wattle | Plastic silt fence |
|---|---|---|---|
| Fill / material | Coir fibre | Straw | Polypropylene fabric |
| Durability | Several seasons | Usually one season | Until removed |
| After the job | Left in place to biodegrade | Left in place | Must be removed and disposed of |
| Vegetation | Plants establish in and behind it | Plants establish behind it | None |
| Wildlife | Natural fibre | Natural fibre | Entanglement risk |
Installation
Installed in four steps
Standard practice for this product. Your project drawings and local specifications always take priority.
- 01
Mark the contour
Set out each row level across the slope, along the contour, at the spacing for your slope.
- 02
Dig a shallow trench
Dig a trench along the line, at least about 5 cm deep and deeper in soft soil, so water cannot run underneath.
- 03
Lay and butt
Lay the wattle in the trench, butting ends tightly together, and press it into full contact with the soil.
- 04
Stake and backfill
Drive stakes through or beside the roll about every 1.2 m, then backfill and compact the uphill side.
Natural erosion control for every edge, slope and shoreline your project has to hold.
Discover the possibilities
Wattles and silt fences are used on and around sites where soil is exposed and runoff needs managing.
- Gullies & Slopes
- Roads & Verges
- Canals & Channels
- Wetland Planting
- Placeholder photoApplicationGullies & Slopes
- Placeholder photoApplicationRoads & Verges
- Placeholder photoApplicationCanals & Channels
- Placeholder photoApplicationWetland Planting
Find quick answers
Frequently Asked Questions
What is a coir wattle?
A roll of coir fibre held in netting, laid across a slope along the contour to slow runoff and catch the silt it carries.
How is a wattle different from a silt fence?
A wattle lies on the ground across the slope. A silt fence stands upright on stakes, usually around the edge of a site or a drain, holding sediment back while water passes through.
Where are they used?
On construction sites, cut slopes and embankments, around drain inlets and along site perimeters, wherever exposed soil could wash away.
How are they installed?
Wattles are set in a shallow trench along the contour and staked through. Silt fences are fixed to stakes driven in along the line, with the base set into the ground.
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