French Drain Analysis: Effective Runoff Management in Shellharbour

Addressing Water Ingress Challenges in Shellharbour

In Shellharbour, a homeowner encountered a serious and worsening problem with water ingress. Water from two adjacent properties, which are situated at a higher elevation, began to flow into their garden and infiltrate the foundation of their house. This uninvited water intrusion caused substantial damage to the flooring, promoted rising damp, and encouraged mould growth within the property, thereby jeopardising recent renovations.

How Can You Identify Signs of Water Intrusion?

The issue originated from both surface runoff and subsurface water flowing downhill from the back and side yards of neighbouring properties. Without an effective drainage solution to intercept this water, it inevitably made its way beneath the house.

Creating a Comprehensive Drainage Solution

CS Plumbing designed and installed a gravity-fed French drain system aimed at capturing and redirecting water before it reached the foundation of the home.

This project incorporated several crucial elements:

A French drain system meticulously designed to collect both surface and subsurface water from adjacent properties, efficiently channelling it through gravity to a concrete pit.
A 100mm PVC pipe running from the pit to the curb, featuring carefully drilled holes in the curb to ensure effective water discharge.
Three new, larger-diameter Colorbond metal downpipes, which replaced the original smaller versions, connecting to new 100mm PVC piping leading to the curb.
A retaining wall system constructed along the boundary, employing concrete sleepers and galvanised steel posts, with auger holes drilled using an excavator to create a robust barrier to retain the adjacent yard.
Efficient soil removal using a dumper to ensure streamlined management of the worksite.

What Measures Can You Implement for Effective Water Management?

The newly installed system now effectively captures both surface and subsurface water at the property boundary, ensuring it is redirected away from the home. The homeowner has secured a durable, low-maintenance solution that safeguards the foundation, flooring, and their investment in renovations.