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Soakaways 101: What They Are And How They Work

Soakaways have been used to manage rainwater runoff for centuries. They're commonly found in areas with poor drainage or a high risk of flooding, such as roofs, driveways, car parks, roads, and open spaces. When properly maintained, a well-designed soakaway can improve the overall safety and sustainability of a site for years to come. 

Greenstar are one of the South’s leading experts in drainage systems. With years of experience installing soakaways, we have an in-depth understanding of how they work and where they’re best used. Read on for everything you need to know about these unique systems, from the methods used to create them to the benefits of having one on your property. 

What are soakaways and how do they work? 

Soakaways are a drainage system used to manage surface water runoff from hard surfaces. Traditionally, they were built by digging a pit and filling it with coarse stone or gravel. Surface water would drain through the gravel, slowly passing through to the soil below. 

Thanks to technological advancements, most modern soakaways use soakaway crates in place of stone. These modular crates allow for the gradual release of excess rainwater back into the ground through the process of infiltration, improving upon previous methods of rainwater management in terms of functionality and eco-friendliness. 

How are soakaways installed? 

Firstly, the area where the soakaway crate will be installed needs to be excavated. A layer of geotextile fabric will be laid at the bottom and sides of the excavation. This will help prevent soil and sediment from clogging the system. 

The next step is to place the crates into the excavation. Soakaway crates are modular, so they can be easily connected to create the desired size and shape. With the crates in place, the inlet and outlet pipework can be connected between them and a drainage system. The inlet pipe will collect surface water runoff and send it into the crates, while the outlet pipe will allow water to gradually seep out of the crates and into the surrounding soil. 

Finally, the soakaway crates will be covered with another layer of geotextile fabric and the excavation will be backfilled with soil. The surface will then be finished with a suitable hard or soft landscaping material. 

Depending on the size and complexity of the system, the installation process can take anywhere from a few days to a couple of weeks to complete. 

What are the benefits of a soakaway? 

Soakaways offer several benefits for managing surface water runoff: 

  • Soakaways can help to prevent flooding by capturing and storing rainwater runoff and slowly releasing it back into the ground, reducing the amount of water that enters drainage systems and watercourses. 
     
  • Because they allow water to infiltrate into the ground naturally, soakaways are a much more eco-friendly solution than other drainage systems. Draining into the ground reduces the risk of water pollution and supports local ecosystems. 
     
  • Soakaways can increase land use by allowing areas that were previously unusable due to poor drainage to be developed for residential, commercial, or recreational use. 
     
  • Soakaways require minimal maintenance and can be designed to suit a range of site conditions, making them a cost-effective solution for managing surface water runoff. 
     
  • Soakaways are a versatile solution that can be customised to meet the specific needs of a site, whether it’s a residential property, commercial development, or public green space. 

When do soakaways need to be replaced? 

Soakaways are designed to be a long-lasting solution, but like all drains, they may eventually need to be replaced if they become damaged or clogged. Signs that a soakaway may need to be replaced include: 

  • Flooding or standing water 
  • Foul odours 
  • Slow drainage 
  • Structural damage, like cracks or a collapse 
  • Age-related damage 

If you notice any of these signs, it’s important to have your soakaway inspected by a professional. They’ll be able to determine the cause of the problem and whether it needs to be repaired or replaced. 

Should I install a soakaway on my property? 

Although soakaways are a fantastic drainage solution, they’re not suitable for every property. Whether or not you should install one depends on a variety of factors, including the amount of rainfall in your area, the topography of your site, and the building regulations in your area. 

If your area receives a high volume of rainfall or experiences flooding, a soakaway may be a good solution to help manage surface water runoff. The topography of your site can also play a role – soakaways work best in areas with permeable soils that allow water to infiltrate into the ground quickly. If your site has impermeable soils or is located on a slope, a soakaway may not be the best solution. 

Depending on your location, there may be local regulations and permits required for installing a soakaway, so it's important to research the laws in your area first. 

Trust Greenstar for an expert soakaway installation 

If you're experiencing waterlogged or flooded areas on your property, a soakaway may be the ideal solution. Greenstar's team of experienced professionals can survey your property and help you determine whether a soakaway is suitable for the site. If so, they’ll advise which system will best meet your drainage needs. 

Once you’re happy to go ahead, we’ll install your new system quickly and safely, taking care to optimise it for your property’s layout. The end result will be a cost-effective, eco-friendly system that will keep your property dry and safe once more. 

Should any issues arise with your soakaway down the line, we’ll be at the scene to repair, replace, or unblock it in no time – any time of day, any day of the week. 

Book a survey online or call us on 01202 355 344 to get started! 

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