Rubble Soakaway
Rubble-filled soakaways are simple, traditional drainage solutions designed to manage excess surface water by allowing it to gradually disperse into the surrounding soil. They consist of a pit filled with loose stones, broken bricks, or rubble, creating voids that temporarily store rainwater during heavy runoff. As the water collects, it slowly infiltrates the ground, reducing surface flooding and relieving pressure on drainage systems. Rubble-filled soakaways are commonly used in gardens, driveways, and smaller developments where a low-cost, low-maintenance option is suitable. Their straightforward construction and reliance on natural infiltration make them an effective and environmentally friendly drainage method. Rubble soakaways typically only offer a 30% void ratio so need to be larger than crate alternatives.
What is a Rubble Soakaway?
The traditional soakaway type — a pit filled with clean, coarse rubble, gravel, or broken stone. It allows rainwater to fill the spaces between the stones and slowly percolate into the surrounding soil.
How it works:
Water enters the pit and drains away through the natural soil.
At UK Drainage Design, we specialise in the design of rubble filled soakaways, providing tailored solutions to effectively manage surface water on residential, commercial, and industrial sites. Our team carefully assesses site conditions, rainfall patterns, and soil permeability to create efficient, compliant designs that prevent flooding and reduce pressure on existing drainage systems. Using a traditional rubble filled approach, we can maximise storage capacity while minimising excavation and disruption. From concept through to construction guidance, we ensure our designs are practical, sustainable, and meet all regulatory requirements, giving our clients peace of mind and long-term performance.
Advantages/Limitations
Advantages:
- Simple and low-cost to construct.
- Uses natural, locally available materials.
- Effective for small domestic applications.
Best for:
- Older properties, small gardens, or rural areas.
Limitations:
- Lower storage capacity than crates (void ratio around 30–40%).
- Stones can clog over time, reducing efficiency.
- Harder to clean or inspect once installed.