Prime Piling

Piled Raft Foundation

The best solution for unstable soil. We design and build such foundations in Essex and London

jack topping
jack topping
I found Prime Pilling one of the best companies to do business with. They are polite, efficient, thorough and very competent indeed. It was a pleasure to do business with them and I recommend them unreservedly. Emmanuel
Paul Hastwell
Paul Hastwell
The prime piling team were excellent - leveraging their expertise to manage the complexities of the site and working round the the poor foundations of the existing building. Great level of service, soup to nuts - fundamental activities (e.g. shuttering) were included and not an added extra as some other people had quoted. highly recommended!
Chris James
Chris James
Prime piling have just finished working for us- I had zero experience or knowledge of them or Piling before - They arrived on schedule & explained what was required and just got on with it. Despite finding some inevitable problems in an awkward location, Jamie and his guys swept them aside in a very professional manner. They left the site in good order every night and always consulted with us on best and cost effective option. I will definitely be using them again and we are very comfortable to leave a review and / or recommend to others. A 5 star company......
harry adams
harry adams
Very friendly and efficient. Completed the job in the estimated time frame given, even with multiple obstacles being thrown at them. Turning up through terrible weather. Tidying up every day. Can’t fault the service at all.
Anne-Sophie Gossan
Anne-Sophie Gossan
We used Prime Piling for our extension. We have found them extremely reliable, thorough and professional. They came when they said they would come, finished when they said they would finish and did the work to a high standard which was approved by the building controller.
Prime Piling were great on the job that grew more and more difficult by the day at no fault of their own. Jamie and his team were responsive and kept me up to date throughout the project even offering me help and advice. Would definitely use them again and recommend them to others.
Vincenzo Palmieri
Vincenzo Palmieri
We found Jamie and the team to be very experienced professionals in the groundwork/piling services. It took us some time to find reliable company and we were not disappointed with our choice. Initially, we had a wrong evaluation by the appointed structural engineers and Jaimie managed to find a solution without delaying our project. Very professional, calm, reliable.
Alex Gibbard
Alex Gibbard
Jamie and Kieran were fantastic. Jamie kept us informed during the project and the workmanship was great. I wish I had been in contact with Jamie earlier in the process, as he’s keen to keep the costs down, especially during the design phase with the engineer. I would highly recommend getting in touch with Jamie and Samantha for your piling and job.
David Lewis
David Lewis
After an initial inspection the quotation was agreed. The engineers commenced the work on the due date on time and performed the job in a clean professional and helpful way. I was impressed by their attention to detail and their willingness to adapt if and when needed. I would have absolutely delight in recommending this company for piling work again and if you need a reference you may contact me though them.
Mini Piled Underpinning

What is it piled raft foundation?

A piled raft foundation is a clever combination of both pile foundation and raft foundation. Let’s break it down:

  1. Piles: These are vertical structural elements driven into the ground. They can transfer loads from the superstructure to deeper, more stable soil or rock layers. Piles are often used when the upper layers of soil are weak or compressible.

  2. Raft: A raft foundation (also known as a mat foundation) is a large, flat slab that spreads the load from the building over a wider area. It rests directly on the soil or rock beneath it.

  3. Piled Raft: Now, imagine constructing piles first. These piles penetrate the ground, providing additional support. Next, a raft (the flat foundation slab) is placed, incorporating all the piles. The key factor in designing a piled raft foundation is the interaction between the piles, soil, and raft.

    • Pile-Soil Interaction: How the piles interact with the surrounding soil.
    • Pile-Pile Interaction: Consideration of the interaction between adjacent piles.
    • Raft-Soil Interaction: Understanding how the raft interacts with the soil.
    • Pile-Raft Interaction: Ensuring effective load transfer between the piles and the raft.
  4. Advantages of Piled Raft Foundations:

    • Reduced Settlement: The addition of piles minimizes overall settlement and differential settlement.
    • Improved Lateral Load Resistance: Piled rafts enhance the structure’s ability to resist horizontal forces.
    • High Axial Load Applications: They’re commonly used in high-rise buildings with substantial axial loads.
    • When Rock Socketing Isn’t Feasible: In cases where piles can’t be socketed into rock due to its absence, piled rafts provide an alternative solution.
  5. Design Considerations:

    • Ultimate Load Capacity: Assessing vertical, lateral, and moment loading.
    • Settlement: Controlling maximum and differential settlement.
    • Raft Moment and Shears: Ensuring structural integrity.
    • Pile Loads and Moments: Designing piles effectively.
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Our Services

Mini Piling

Prime Piling has built up to become one of the best Mini Piled Underpinning service providers.

SFA Open Piling

SFA piling is an ideal solution for building with limited access.

SCD Piling

SCD (Steel Cased Driven) Piling is a bottom-driven piling using a vibrating mole or a drop hammer piling rig

Need some help with your project?

With over 20 years of experience and knowledge we offer a complete package with all foundation work, including design, drawings and calculations.


Our Recent Work

Innovative approach

Innovative approach

Combines pile raft foundation is the different technique of foundation design which is suitable for both shallow and deep foundation. Not only this but it is suitable for every soil type and it can bear the pressure of superstructure of high rise buildings. As the trend is changing and people invest more in vertical buildings instead of horizontal construction. Thus people considered piled raft foundation as an innovative approach because it plays important role in various things which is neglected by most of us as it allows us to avail the area which is not used because of the foundation designing and construction problem.

Moreover due to the raft on piles technique many f the investors get a chance to develop their business in those areas which are the sites of construction but there is no building there because of weak and porous soil type.  Thus pile raft foundation design concept brings new hope to those who have a dream to do something uncertain which is not been done by anyone before. Now people like these can build their dream building in those areas where no one constructs the building before.

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How is it different from a simple foundation

It is quite different from the simple foundation as the name of the foundation type distinguishes the characters of the foundation. The raft in the foundation name means the mat which plays an effective role in overcoming the pressure of horizontal loads because it increases the surface area of the foundation and scattered the load evenly so that the building can resist the outer pressure easily. However, a simple foundation is just suitable for limited soil types and for the shallow foundation on which the superstructure is not so heavy. A combined pile raft foundation is suitable for both shallow and deep foundations which means that if you construct this type of foundation you can build high rise buildings easily even if the soil type is not standard. Most of the building designers and contractors suggested this foundation because of its capability and resistance against the pressure of the load.

If you want to get this foundation for your building you can contact us through the contact details given on our website.


Frequently Asked Questions

Piling is the process of inserting structural piles into the ground that will become the base of the building. Piles are required where soil and earth are performing poorly and are used to spread the load of a building and firm the ground. They are a cost-effective approach to combating corrosion and are proven to significantly improve the life expectancy of a structure

The size of the trench depends on the size of the ground beam to be installed. For our typical ground beams to an extension an excavation of 600mm deep and 450mm wide is sufficient. Please ring for advice.

There are a number of reasons it may be: A site investigation has highlighted that the ground is unsuitable and un-useable to a depth of more than 2 metres. Removal costs for the excavation of traditional deep trench foundations are too expensive. Foundation trenches are not stable and health and safety, therefore, becomes an issue. There is a high-water table. Where there are soils such as clay that are likely to swell or shrink excessively depending on the amount of water content.

The job of the pile is to distribute the weight of the structure evenly. They are placed into the ground using a pile driver. Holding the piles perfectly vertical, this machine hammers each structure into the ground and also acts as a crane.

For a typical house extension, the work can take around 2-3 days, depending on the depth driven and services requested. For more complex projects, contact us for a more specific time frame.

Mini piling in Essex and Colchester is a type of specialist piling that incorporates a specific arrangement and number of driven pile and screw pile varieties. It allows for the expansion or extension of a building, while also safeguarding against ground heave and subsidence. Crucially, mini piling is often a cheaper, faster option than traditional deep trench foundations.

Contact us

Speak to one of our team today

07872 591446

Give the team a call

Ducketts wharf, South Street, Bishops Stortford, CM23 3AR