Screw piles are known for being one of the most versatile foundation solutions for a variety of projects. They work in conditions that many other foundation types simply can’t withstand, including sand, water, and flood-prone regions. They’re fast and easy to install, and weather-independent. And they provide a low-carbon, low-impact alternative to traditional concrete foundations. But there’s one question that we’re always asked: how long do screw piles last?

Screw Pile Durability: What Do You Need to Know?

How long do screw piles last?

When installed correctly and properly maintained, screw piles typically last between 75 and 100 years. At UK Helix, we offer two different screw pile series. Our ECO series, which are designed for manual installation and smaller projects, such as garden sheds and fences, come with a 50-year guarantee. Our commercial screw piles, which are intended for large-scale construction, come with a 100-year warranty.

However, it’s important to note that not all of them are the same. And the longevity can be influenced by a range of factors.

What influences the durability of screw piles?

Material quality

The quality of the materials used in screw pile production will impact their longevity. Some steel ones are galvanised or coated to resist corrosion. At UK Helix, most of our pile products are hot-dip galvanised. However, this isn’t usually necessary in larger ones with 6.3mm thick walls because they are thick enough to withstand corrosion of the required use period. In this case, ‘sacrificial material’ is used to enhance strength and durability. 

Soil conditions

The soil conditions of the installation site can also impact how long screw piles last. In areas with highly corrosive soils, they may degrade more quickly. In which case, additional protective measures may be needed. Areas of high moisture may also lead to faster rusting. This is one of the reasons why it’s always a good idea to test your soil before ordering. It allows any additional precautions to be taken.

Load and stress

If you install the proper screw piles for your project, taking into account projected load and stress, they should last at least as long as the warranty. However, if the wrong ones are installed, or the correct piles are poorly installed, they may not withstand heavy stress. They may also wear down more quickly. Extreme weather, such as hurricane-force winds, which deliver tremendous lateral force, can also damage screw piles.

How can you help your screw piles to last longer?

Thanks to a process known as thixotropy, most screw piles become stronger over time. So, as long as you choose the right one’s for the job and install them properly, performing the relevant load tests, there is no reason why they shouldn’t last.

However, it’s always good practice to periodically inspect your screw piles, to monitor for settling, and check load-bearing capability, as you would with any foundation type. This simply ensures that if any problems arise, you can address them as soon as possible, enhancing the pile’s lifespan.

Screw piles are designed to provide long-lasting stability and support for a range of structural foundations. From garden sheds and home extensions to piers and lighthouses. To get the best from them, all you have to do is buy the right screw piles for the job. And ensure that they are installed properly.

Are you looking for screw pile design, supply, and installation services? Get in touch with UK Helix.