Silt Fence Installation

FAQ: How do you install a silt fence in rocky soil?

silt fence Question: My company began construction last week and we are having some difficulty with our silt fence. It keeps falling down and I am not sure why. The area around the fence is rocky, so we think it may have to do with that. Can you help?

Answer: The Silt Fence does have some limitations and should not typically be installed along areas where rocks or other hard surfaces will prevent uniform anchoring of fence posts and entrenching of the fence fabric. This will greatly reduce the effectiveness of silt fencing and can create runoff channels leading off site and costly fines.

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

Silt Fence Installation

When installing the silt fence, you will typically want to excavate the bottom of the fence to create a backfill along the bottom of the fence of at least six inches (6"). This helps to stabilize the fence and keep it in place during runoff and water control applications. This method may help to keep your fence from falling down.

If a standard strength geotextile is used, it can be reinforced with wire mesh behind the filter fabric. This can increase the effective life of the fence. The maximum life expectancy for synthetic fabric silt fences is approximately 6 months, depending on the local conditions.

Silt Fence Inspection

staked silt fenceAnother important feature to the silt fence is the inspection process. Silt fences should be inspected frequently, as well as after each rainfall event, to ensure that they are intact. If gaps or tears are found, they should be repaired or the fabric should be replaced immediately. Accumulated 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.

Learn more about Silt Fence Installation.

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