Construction Silt Fence

Silt and Construction Fencing

silt fenceThe Silt Fence is an erosion and sediment control barrier used on construction sites, work areas, and other locations with high levels of displaced sediment. Working to accommodate the requirements of different states and projects, fencing materials are available in three different fabric options: Economy Grade (50 gram), Contractor Grade (70 gram), and DOT Grade (100 gram).

Questions? We can help. Call us: +1-772-646-0597 or contact us to discuss your project.

Silt and Construction Fencing Technical Specifications

Typical Roll Sizes
3' x 100'
3' x 330'
Sold with Stakes and by the Roll

Silt Fence Specifications

8x8 weave
11x11 weave
11x11 weave
Grab Tensile
98.8 lbs. x
92.4 lbs.
135 lbs. x
125 lbs.
Grab Elongation
Mullen Burst
ASTM D 3786
230 psi
205 psi
200 psi
ASTM D 4833
52 lbs.
50 lbs.
50 lbs.
Trapezoid Tear
ASTM D 4533
47 lbs.
52 lbs.
60 lbs.
ASTM D 4751
10 sieve
40 sieve
30 sieve
Flow Rate
ASTM D 4491
30 gal/min/ft.
ASTM D 4491
0.03 sec
0.05 sec
0.1 sec
UV Resistance
ASTM D 4355
80% after 500 hrs.
80% after 500 hrs.
80% after 500 hrs.

Please feel free to call us at any time at 1-772-646-0597 or request an estimate.

Site and Drainage Requirements

silt fenceStandard Silt Fencing can be seen on any site dealing with small drainage areas or
significant amounts of displaced sediment. In general, silt fencing is used in the
following areas:

  • Low Level Shallow Flows
  • Areas with Flows Under 0.5 cfs

For all locations, it is typically recommended the drainage area should not exceed 1/4 acre per 100 ft. of fencing.

Silt Fence Maintenance

Inspection should be done frequently and after each rainfall to ensure that fencing remains intact. If gaps or tears are found, they should be repaired or the fabric should be replaced immediately.

silt fenceAccumulated sediments should be removed from the fence base when the sediment reaches one-third to one-half the height of the fence to avoid failure. Sediment removal should occur more frequently if accumulated sediment is creating noticeable strain on the fabric. When the silt fence is removed, the accumulated sediment also should be removed.


USEPA (1993) reports the following effectiveness ranges for silt control fences constructed from filter fabric that
are properly installed and well maintained:

  • Average total suspended solids removal of 70 percent
  • Sand removal of 80 to 90 percent
  • Silt-loam removal of 50 to 80 percent
  • Silt-clay-loam removal of 0 to 20 percent.

Removal rates are highly dependent on local conditions and installation.

Please feel free to call us at any time at 1-772-646-0597 or request an estimate.

Additional Silt Fencing Design Considerations and Style Options

wire back silt fencingSilt Barriers and Fencing are designed in several different models and styles to accommodate specific sediment requirements in an area.

Models include:

Most sites will typically use the staked fence or wire back model, while areas with high sheet flow may turn to the impermeable Staked Silt Barrier.

Items to Secure Barriers

To help keep your barrier or erosion control material in place, Wooden Stakes can be purchased in options ranging from 24" to 48" in size. For a sturdier option, stainless steel T-Post can be used in place of wooden stakes. These steel stakes come in options of two different lengths and two different weights.

Additional Erosion and Sediment Control Options

GEI Works sells a wide variety of BMPs to suit your local project specifications. If you need BMPs for your next project, please keep us in mind. We have silt fencing strategically stocked and ready to ship to help meet your project goals. Additional BMP models include:

  • coir blocksDrain Guards
  • Inlet Protectors
  • Erosion Control Logs and Wattles
  • Soil Stabilization Matting
  • Floating Silt Screen

Questions? We can help. Call us: +1-772-646-0597 or contact us to discuss your project.