Erosion Control Supplies: What to Specify and When to Use Each
The erosion control product market includes everything from a $2 per linear metre silt fence to a $200+ per cubic metre rock riprap installation. Between these extremes sit erosion control blankets, coir logs, geotextiles, turf reinforcement mats, gabion systems, hydromulch, and polymer surface binders — each with different mechanisms, different cost profiles, different installation requirements and different performance envelopes.
The challenge for the specifier is not finding a product — it is finding the right product for the specific erosion mechanism, slope gradient, flow condition, budget and installation constraint at each location on the site. A silt fence specified across a concentrated flow path will fail within hours. An erosion blanket specified on a mine waste dump batter that cannot be accessed by workers will never be installed. A rock riprap treatment specified across 50 hectares of exposed surface will exhaust the project budget on 2 hectares.
This guide compares every major erosion control product category on the metrics that specifiers actually need: mechanism, cost per unit area or length, installation method and labour, longevity, maximum slope gradient, scale suitability (small area vs large area), and the practical constraints that determine whether the product can actually be deployed in the field conditions of the site.
Product Comparison: Every Major Erosion Control Supply Category
Erosion control supplies: comprehensive comparison
| Product | Typical Cost | Longevity | Slope Suitability | Best Suited To |
|---|---|---|---|---|
| Silt fence | $5–10/m installed | Project duration | Gentle slopes | Perimeter sediment control and sheet flow |
| Straw erosion blanket | $5–8/m² | 3–6 months | Up to 3H:1V | Short-term protection on small to medium slopes |
| Coir erosion blanket | $10–20/m² | 12–36 months | Up to 2H:1V | Longer-term erosion control and revegetation |
| Coir logs / wattles | $10–20/m | 12–24 months | Up to 2H:1V | Reducing runoff velocity and capturing sediment |
| Rock riprap | $80–250+/m³ installed | Permanent | Up to 2H:1V | Channels, outlets and high-energy runoff areas |
| Gabion baskets | $150–400/m³ installed | 50+ years | Vertical retaining applications | Structural retention, walls and drainage channels |
| Non-woven geotextile | $3–8/m² | 20–50 years buried | Any when covered | Filtration, separation and drainage beneath fill or riprap |
| Turf reinforcement mat | $15–40/m² | Permanent | Up to 1H:1V | Steep vegetated slopes and drainage channels |
| Polymer surface binder (GRT) | $1–5/m² applied | Up to 12 months | Tested to 30% | Large-scale slope stabilisation and rapid hydraulic application |
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When to Use Each Product: Application-Based Selection
Silt Fences: Perimeter Sediment Capture Only
Silt fences are the most widely installed and most widely misused erosion control product in Australia. They are designed for one purpose: capturing sediment from sheet flow on gentle slopes at the downhill perimeter of a disturbance area. They are not designed to impound water, intercept concentrated flow, span drainage paths or function as check dams. A silt fence installed across a drainage swale will overtop or collapse within hours of the first significant storm.
Specify when: Sheet flow capture at site perimeter on slopes less than 3H:1V, as a Level 3 (sediment capture) control in the ESCP treatment train. Always combined with Level 1 (erosion prevention) and Level 2 (drainage control) measures upstream.
Erosion Control Blankets: Small-Scale Slope Protection with Revegetation
Straw blankets ($5–8/m²) provide 3–6 months of cover for rapid vegetation establishment on gentle slopes. Coir blankets ($10–20/m²) provide 12–36 months and are effective on steeper slopes (up to 2H:1V). Both require manual installation: rolling the blanket down the slope and pinning with ground anchors every 0.5–1.0 m.
Specify when: Small areas (<1 hectare) where workers can safely access the slope face, where revegetation is the primary objective, and where the budget supports the per-square-metre installation cost. Not practical for mine waste dump batters (too steep, too large, worker-on-slope safety risk) or for sites where speed of coverage is critical.
Limitation: Blankets do not achieve 100% contact with irregular surfaces. Gaps beneath the blanket allow water to flow between the blanket and the soil, undermining the blanket and initiating rill erosion beneath it. This is a known failure mode on mine rehabilitation batters.
Rock Riprap: Channel Armouring and Energy Dissipation
Rock riprap ($80–250+/m³ installed) is the most durable erosion control product available. It is also the most expensive and logistically intensive. Riprap is specified for high-energy flow environments: channel linings, spillway aprons, pipe outlet dissipaters and embankment toes where flowing water would erode any lighter product. EPA guidance generally limits riprap to slopes no steeper than 2H:1V.
Specify when: Concentrated flow channels, spillway outlets, culvert aprons and any location where flowing water energy exceeds the capacity of softer controls. Not specified for broadscale slope protection (prohibitively expensive at scale) or for areas where vegetation establishment is the long-term objective (riprap does not support vegetation).
Polymer Surface Binders: Large-Scale, Rapid, No Workers on Slope
GRT: Enviro-Binder and GRT: Soil-Loc are sprayed hydraulically from the road at the base or crest of the slope using a water truck with spray cannon. No workers on the slope face. No manual pinning. No roll-out. Coverage rates of several hectares per shift make polymer binders the only practical option for large-scale mine site and construction project erosion control where hundreds of hectares require treatment.
At $1–5 per square metre applied, polymer binders are 50–80% cheaper than erosion blankets for equivalent slope protection. Enviro-Binder has been independently tested by Landloch Pty Ltd under simulated rainfall at 2, 10 and 50-year storm intensities, delivering near-zero sediment in runoff across all tested intensities and gradients up to 30%. No erosion blanket, coir log or silt fence has been independently tested at these extreme intensities.
Specify when: Large exposed surfaces (>1 hectare); mine waste dump batters; construction embankments; cable trench backfill; rehabilitation areas; anywhere workers cannot safely access the slope face; and anywhere the coverage speed and cost efficiency of spray application is required. Enviro-Binder supports revegetation through seed germination protection and moisture retention. Hydromulching vs spray-on polymer comparison.
Combining Products: The Treatment Train Approach
Effective erosion and sediment control rarely relies on a single product. The IECA BPESC specifies a treatment train with three levels, and each level uses different products:
Level 1 — Erosion prevention (most important): Polymer surface binder (Enviro-Binder, Soil-Loc) on slopes and exposed surfaces. Erosion blankets on small, accessible slopes. Vegetation establishment as the permanent solution.
Level 2 — Drainage control: Coir logs as check dams to slow overland flow. Diversion banks and contour drains to redirect water. GRT: Floc Blocs placed in drainage structures for passive sediment treatment.
Level 3 — Sediment capture: Silt fences at the perimeter for sheet flow. Sediment basins for volume capture. GRT: CC + Liquid-Floc for basin water treatment before discharge.
The treatment train principle is that Level 1 does the most work. If the soil does not erode (Level 1 is effective), there is minimal sediment for Levels 2 and 3 to manage. A site that relies on silt fences (Level 3) as its primary control has already failed at Levels 1 and 2.
How to prepare an ESCP covers the full treatment train framework.
Cost at Scale: Why Product Choice Changes with Area
The cost comparison between erosion control products shifts dramatically with the area to be treated:
Small area (<0.5 hectares): Erosion blankets are practical and affordable. The manual installation labour is manageable. The material cost ($5–20/m²) is within budget for a limited area. Polymer binders also work but the mobilisation of a water truck with spray cannon may not be justified for a very small area.
Medium area (0.5–5 hectares): Erosion blanket installation becomes expensive ($25,000–$100,000 for material + labour). Polymer binder application ($5,000–25,000 for the same area) is significantly cheaper and faster. The water truck is already on site. The spray cannon reaches the slope from the road. The entire area is treated in one shift.
Large area (5–50+ hectares): Erosion blankets are impractical. The installation labour for 50 hectares of blanket (500,000 m² × manual roll + pin) would take a crew of workers months. Polymer binder application treats the same area in days to weeks at a fraction of the cost. At this scale, polymer surface binders are the only practical Level 1 erosion control option.
This scale effect explains why mine sites and large civil projects use polymer binders while small residential sites use erosion blankets. The product is selected by the scale of the problem, not by a preference for one product over another.
Frequently Asked Questions
What is the cheapest erosion control product?
Per linear metre, silt fences are cheapest ($5–10/m). Per square metre of slope protected, polymer surface binders are cheapest ($1–5/m² applied) because they include no installation labour on the slope. Erosion blankets cost $5–20/m² plus installation labour. Rock riprap is the most expensive at $80–250+/m³. The cheapest product depends on what you are protecting and how much of it.
Can I use silt fences as my only erosion control?
No. Silt fences are Level 3 (sediment capture) controls that manage sediment that has already eroded. They do not prevent erosion. A compliant ESCP requires Level 1 (erosion prevention) controls as the primary defence, with silt fences as the last line of capture for residual sediment. A site relying solely on silt fences will fail in any significant rainfall event and will not satisfy IECA BPESC or council ESCP requirements.
What erosion control works on steep mine waste dump batters?
Polymer surface binders (GRT: Enviro-Binder) applied hydraulically from the road at the base or crest of the batter. No workers on the slope face. Independently tested at gradients up to 30% under 50-year storm intensity. Erosion blankets are impractical on steep mine batters due to the safety risk of manual installation on the slope face. Rock riprap is prohibitively expensive for the area involved. Polymer binders are the only Level 1 control that can be deployed safely, rapidly and cost-effectively on large, steep mine site batters.
How do I choose between erosion blankets and polymer binders?
If the area is small (<0.5 ha), accessible by workers, and the budget supports $5–20/m² installed: erosion blankets are practical and effective. If the area is medium to large (>0.5 ha), steep, inaccessible to workers on the slope face, or the budget requires coverage at $1–5/m²: polymer binders are the better choice. Both protect the soil surface and support revegetation. The decision is driven by the scale and the access, not by a product preference.
Match the Product to the Problem, the Scale and the Budget
Every erosion control product has a role. Silt fences capture sediment at the perimeter. Erosion blankets protect small slopes during vegetation establishment. Coir logs slow overland flow on moderate slopes. Rock riprap armours high-energy channels. Geotextiles filter beneath structural layers. And polymer surface binders protect large areas rapidly, safely and cost-effectively from the road — without workers on the slope, without manual pinning, and with independently verified performance at extreme storm intensities.
The specifier’s job is to match each product to the specific erosion mechanism, slope gradient, flow condition and scale at each location on the site. The treatment train structures this matching: Level 1 erosion prevention first (polymer binder or blanket), Level 2 drainage control (coir logs, diversion banks, Floc Blocs), Level 3 sediment capture last (silt fences, basins, CC + Liquid-Floc).
GRT: Enviro-Binder for Level 1 erosion prevention on slopes and surfaces. GRT: Soil-Loc for broadscale wind erosion protection. GRT: Floc Blocs for passive Level 2 drainage treatment. GRT: CC + Liquid-Floc for Level 3 basin clarification.
Every product has its place. The question is whether the product specified at each location matches the problem at that location — or whether it was specified because it was the product the specifier was most familiar with.
Sources and References
Coleman Moore Company: Erosion Control Blankets vs Rip Rap (June 2026) — Wisconsin DOT 2025 pricing; riprap $67–134/CY; EPA 2H:1V maximum; installation sequence
Malmsbury Timbers: Comparing Erosion Control Products (Jan 2025) — coir logs, jute matting, silt fencing, steel fastening pins; Australian supplier context
Aussie Environmental: Erosion Sediment Control Range — polymer spray, erosion blankets (jute, coir, geofabric), hydromulching, marine/waterways products
GRT: GRT: Enviro-Binder — Landloch testing, near-zero sediment at 2/10/50-year storms, gradients to 30%
GRT: Sediment Control Solutions — CC, Liquid-Floc, Floc Blocs
GRT: Dust Suppression Solutions — Soil-Loc
