Screw piles for subsiding foundations

Screw piles can provide a simple solution for the re-levelling of subsiding foundations. We have a unique product which has been designed to lift and support conventional slabs that have moved or post homes where timber posts have deteriorated. 

Underpinning within 150mm of existing dwelling with screw pile
Underpinning within 150mm of existing dwelling with screw pile
Underpinning bracket with 30T jack system
Underpinning bracket with 30T jack system
Underpinning through existing deck with screw pile
Underpinning through existing deck with screw pile
underpinning prior to new extension in peat
underpinning prior to new extension in peat

We access the building footing with as minimal excavation as possible, install the screw piles at predetermined locations around the perimeter of the building, then attach a patented underpinning bracket which is then jacked up using a 50T jack.

FAQ
  • Do you have any details?

    There are several details you can download from our Resources page. These are available for your engineer or architect. If these details don't work for your application, give us a call as we do have alternative details, or we can work with your (or our) engineer to develop an effective solution. 

     

  • How deep can the pile go?

    Once we install the initial driving helix (2m pile with helix), we can keep adding onto the pile to go as deep as is required, providing there are no obstacles such as large tree roots or rocks in the way.

     

  • We have a difficult site to access, how far can your machinery reach?

     

    Whether it’s a steep bank, an ecologically sensitive area, or limited access onto the site, we have specialised equipment with a reach of up to 18m. If this is not enough, our expert team will find a solution for you.  


     

     

  • What is the lifespan of your screw piles and will they rust?

    The lifespan of our screw piles is 50 + years. This is standard practice for building consent.

    Some people are under the misconception that our screw piles are steel and will rust away. When steel is installed into the ground it is deprived of oxygen. This means that only surface rusting occurs which does not affect the structural integrity of the grade of steel. The same goes for concrete. This is why we  often install the top section of the pile in a small concrete cap - to prevent any oxygenation taking place.  If there is an exposed pile, we can advise on a coating system.

     

  • What Kn of pile can you provide?

    We can design piles to suit individual projects. To date we range from 2T to 100T piles.