We’re proud to serve customers throughout Cumbria and beyond, including:
Soakaway Installation
Effective, compliant solutions for rainwater infiltration and drainage
Soakaway Installation in Cumbria
Installing a soakaway is a smart, sustainable way to manage surface water on properties without relying solely on mains sewers. At Unblock Cumbria, we design and install soakaway systems across Cumbria and the Scottish Borders, helping homeowners, developers, and rural properties handle rainwater responsibly. Whether you’re building an extension, paving a driveway, or tackling pooling issues, our team ensures the soakaway is sized, located, and built to the highest standard.
We start with a thorough site and soil assessment, including percolation (soakaway) tests, to determine whether your land can absorb the water. Once feasibility is confirmed, we handle the full installation — excavation, crate or stone fill, connecting pipes, geotextile membranes, and final reinstatement — all while ensuring compliance with building regulations and environmental guidelines.
What’s Included
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Site survey & feasibility study (soil porosity, groundwater levels, location)
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Design and dimensioning based on roof/runoff area and local rainfall data
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Percolation tests (BRE 365 or similar standards)
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Excavation of soakaway pit(s)
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Installation of soakaway crates or stone aggregate fill
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Geotextile membrane and pre-filter / silt trap integration
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Connection of downpipes / drainage pipes to the soakaway
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Final backfill, compaction & surface reinstatement
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Testing and verification of drainage performance
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Full documentation and sign-off for Building Control
We also provide optional features such as silt trap chambers, inspection ports, and preventative maintenance plans to guard against long-term failure.
Why Soakaways are Important
Key benefits of a well-designed soakaway:
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Prevents flooding – Manages excess rainwater during heavy downpours, reducing standing water on drives, patios, and lawns.
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Reduces sewer overload – Diverts clean rainwater from public sewers, helping prevent localised surcharging and sewer flooding.
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Supports groundwater recharge – Allows water to filter back into the soil, helping maintain natural water balance and sustainability.
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Improves property drainage – Keeps your property free from pooling water and protects foundations from prolonged saturation.
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Complies with SuDS regulations – Encouraged by planning authorities and Environment Agency guidelines for eco-friendly drainage.
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Low-maintenance and long-lasting – Once installed and filtered properly, soakaways provide decades of efficient water dispersal.
Why Choose Us?
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Hands-on local expertise — We know Cumbria’s soil types, terrain, and drainage challenges
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Full system care — From design and testing through installation and verification
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Compliance assured — We work to Building Regulations (Part H) and environmental rules
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Transparent quoting — No surprise costs; we show you the plans and numbers ahead
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Quality materials & techniques — Crate systems, membranes, silt traps, and precision backfill
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Ongoing support — We offer service plans, maintenance, and inspections
With us, the installation isn’t just done — it’s done right, with long-term performance, minimal headaches, and full compliance in mind.
Areas We Cover
- Whitehaven
- Workington
- Carlisle
- Keswick
- Wigton
- Kendal
- Windermere
- Penrith
- Barrow-in-Furness
- and surrounding areas across the Scottish Borders.
If you’re unsure whether we cover your location, just give us a call — our friendly team will be happy to help.
Sustainable Drainage
Soakaways (or infiltration systems) play a crucial role in sustainable drainage (SuDS). They allow surface water to disperse naturally into the ground, reducing pressure on local sewer networks, minimising flood risk, and helping replenish groundwater supplies.
However, their effectiveness depends heavily on soil type, water table level, and correct design. In clay-rich or compacted soils, soakaway performance can be poor unless carefully engineered to suit site conditions.
Proper planning and professional installation ensure your soakaway works efficiently year-round — even under extreme rainfall.
Frequently asked questions
What is a percolation or soil “soakaway” test?
A percolation test involves digging a small test pit, filling it with water, and measuring how fast the water drains into the surrounding soil. This gives us the infiltration rate, which is crucial for designing the correct soakaway size. If the soil is too impermeable (e.g., clay), alternatives or remediation may be needed.
How far does a soakaway need to be from a building?
Generally, a soakaway should be located at least 5 metres away from any building to prevent undermining foundations. In some situations (sloping ground, marginal soils), greater separations may be required.
Can soakaways work under driveways or drive over areas?
Yes — but only if designed with structural strength in mind. Soakaway crates or modules need adequate cover and load-bearing capacity. The system design must account for vehicle loads to prevent collapse or compaction.
Do soakaways ever fail?
Yes — especially if silt, debris or soil particles clog the system over time. Without proper pre-filtration or maintenance, the soakaway’s absorption capacity may degrade, causing backups or overflow. Many such failures can be prevented with integrated silt traps and periodic inspection.
How much does soakaway installation cost?
Costs vary depending on depth, soil permeability, site access, crate or aggregate choice, and excavation complexity.
Do I need planning permission to install a soakaway?
For rainwater soakaways, you normally don’t need planning permission, though you will need to comply with Building Regulations (Part H). For foul drainage soakaways, they are often replaced by requirements for drainage fields and stricter standards under modern regulations.
Get Your Free Quote
Our experienced, security-cleared team delivers reliable solutions. Call 01900 870 140 for immediate assistance. Prefer email? Simply complete our contact form and we’ll respond promptly with a tailored quote.