Coir log
Also called a coir fibre roll, coir roll or bio-log
The standard log for bank toes, lake shores and slope breaks. It absorbs wave and current energy, traps sediment and gives plants a protected place to root, then breaks down as the roots take over.
- Fill100% coir fibre
- Diameter30 to 50 cm
- Length3 to 6 m
- Lifeabout 3–7 years
Best for
- Streambank and channel toes with slow-moving water
- Lake and pond shorelines
- Wetland edges and slope breaks
- Sediment control at the foot of slopes
Choose another option for
- Wave-exposed or faster-flowing sites Choose Firm-fill log →
- Sites needing plants on day one Choose Pre-planted log →
Coir log at a glance
| Property | Value | Basis |
|---|---|---|
| Fill | 100% coir fibre | |
| Netting | Coir twine net | |
| Diameter | 30, 40 or 50 cm (12, 16 or 20 in); smaller for sheltered sites, larger for exposed sites | Mass. CZM guidance |
| Length | 3 to 6 m; other lengths to project | |
| Functional life | about 3 to 7 years, depending on packing density and exposure | MWMO, Mass. CZM |
| Staking | Two stakes at each end, then alternating sides about every 30 cm | MWMO |
| Planting | Plugs about every 30 cm | MWMO |
| Not for | High-velocity flow | Alaska Dept. of Fish and Game |
Reference figures: Massachusetts Coastal Zone Management (sizes, life), Mississippi Watershed Management Organization (staking, planting), Alaska Department of Fish and Game (where they work). Your logs are built and confirmed to project.
How much do you need?
One row of logs. Stakes estimated at two per end plus one about every 30 cm, alternating sides. Adjust spacing to your site.
Sizes
Sizes are agreed per project. Send us drawings, lengths or areas and we will confirm the specification and quantities before quoting.
Laying it right
- 01Prepare the bedClear rocks and debris so the log touches the soil along its whole length. Work at low water.
- 02Bed it inSet the log at the base of the bank, around the normal water level, in a trench. Deeper bedding resists being lifted.
- 03Stake both sidesWooden stakes about 5 × 5 cm and 0.9–1.2 m long: two at each end, then alternating sides about every 30 cm.
- 04Tie and plantTie across the log between stakes, drive stakes flush, lace logs end to end and bury the ends. Plant plugs about every 30 cm.
All Coir Logs options
About Coir log
What diameter do I need?
Smaller logs suit sheltered sites; larger diameters suit exposed sites and steeper banks. Send us the water conditions and bank height and we will recommend a size.
Can logs be joined?
Yes. Logs are laced end to end with natural twine, and the end logs are buried or tied into the bank so water cannot get behind them.
Do I need a permit?
Work below the high-water line often needs one. Check with your local authority before installation.
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