If you’re planning a new drainage system, extension, driveway, or property development, you may have come across the term “soakaway”.
A soakaway is one of the most common methods used to manage rainwater and surface water in the UK. When designed and installed correctly, it can help prevent flooding, reduce pressure on drainage systems, and ensure water is disposed of safely.
But does every property need one?
What Is a Soakaway?
A soakaway is an underground drainage system that allows rainwater to gradually soak back into the surrounding ground.
Rather than directing surface water into the main sewer network, a soakaway collects water and allows it to disperse naturally.
This helps reduce the volume of water entering public drainage systems during periods of heavy rainfall.
How Does a Soakaway Work?
The principle is relatively simple.
Rainwater from roofs, driveways, patios, or hard surfaces is directed into the soakaway through a series of pipes.
The soakaway itself is typically constructed using:
- Soakaway crates
- Gravel-filled pits
- Modular storage systems
Once the water enters the soakaway, it slowly filters into the surrounding soil.
Why Are Soakaways Important?
Surface water management has become increasingly important in recent years.
Heavy rainfall can quickly overwhelm drainage systems, leading to:
- Localised flooding
- Water pooling
- Property damage
- Increased pressure on public sewers
A soakaway helps manage this water more effectively.
Do All Properties Need a Soakaway?
Not necessarily.
Whether a soakaway is required depends on several factors, including:
- Ground conditions
- Property location
- Existing drainage infrastructure
- Planning requirements
- Surface water volumes
In some cases, alternative drainage solutions may be more appropriate.
When Is a Soakaway Commonly Installed?
Soakaways are often installed during:
- New build developments
- Home extensions
- Driveway installations
- Landscaping projects
- Commercial developments
Many local authorities encourage the use of sustainable drainage solutions where possible.
Can Every Property Have a Soakaway?
Unfortunately, no.
The effectiveness of a soakaway depends heavily on the soil’s ability to absorb water.
Clay soils, for example, often drain very slowly and may not be suitable for traditional soakaways.
This is why proper testing should always be carried out before installation.
The Importance of Soakaway Testing
Before a soakaway is designed, a drainage specialist will often carry out infiltration testing.
This helps determine:
- How quickly water drains into the ground
- Whether the soil is suitable
- The size of soakaway required
Without testing, there is a risk that the soakaway will not function properly.
Common Problems With Poorly Designed Soakaways
A poorly designed soakaway can create a range of issues.
These may include:
- Waterlogging
- Flooding
- Saturated ground
- Drainage failure
- Damage to nearby structures
Proper design and installation are essential to avoid these problems.
Soakaways and Building Regulations
Depending on the project, soakaways may form part of the drainage strategy required for building regulations approval.
They are often used as part of Sustainable Drainage Systems (SuDS), which aim to manage rainwater in a more environmentally responsible way.
Compliance should always be considered during the planning stage.
Why Professional Design Matters
A soakaway is not simply a hole in the ground.
To perform correctly, it must be designed based on:
- Ground conditions
- Rainfall calculations
- Drainage requirements
- Property layout
Professional design ensures the system works effectively for the long term.
Expert Drainage Advice for Property Owners
With over 1,000 five-star reviews across Google and Checkatrade, RR First Drainage Care & Repair has established itself as one of the UK’s most trusted drainage specialists.
Their experienced team regularly advises homeowners, businesses, developers, and property managers on drainage design, new drain installations, soakaways, and surface water management solutions.
Is a Soakaway Right for Your Property?
A soakaway can be an excellent solution for managing surface water, but it isn’t suitable for every site.
The best way to determine whether your property needs one is through a professional drainage assessment. By understanding the site’s conditions and drainage requirements, you can ensure the most effective and compliant solution is chosen for your property.
