You are using an outdated browser version not supported by this website.
Click here to upgrade your browser

Transportable Building Foundation

StopDigging provide a CodeMark certified groundscrew pile foundation system, that works as a cantilever pile foundation for all types of transportable buildings.

StopDigging's bespoke Design and Installation Declaration process allows easy specification and consenting.

Key Features
  • Codemark certified for an LBP Designer to specify within the scope of the Design Guide without further engineering costs
  • Groundscrews are the most efficient piling solution available due to speed of installation and instant load bearing capacities
  • Stopdigging provide onsite, static pile testing as formal verification for each project, which also eliminates the risk of on site variations
  • A Groundscrew foundation eliminates ground disturbance, and creates zero site waste allowing a massive increase in productivity onsite compared to traditional methods
  • Groundscrews are available in a wide variety of diameters, lengths and types to provide a solution for almost all ground conditions evident in NZ
  • The groundscrews system is highly sustainable and offers a lower carbon footprint than any other method
  • Groundscrews are designed as a permanent foundation solution, however they can easily be removed and re-used allowing them to be a perfect solution for temporary transportable buildings
  • We also provide a full siting service for Tiny Homes, Transportable Houses, School Classroom units, Commercial Site Office Compounds and groundscrew to subfloor connections
  • Multiple design options for building being delivered either on a trailer, or by HiAB/crane
Structural Systems
NZ-Owned Business
NZ-Owned Business
Scope of Use

Groundscrews are suitable for all types of house piling either within the scope of NZ3604 or with structures that have specifically engineered design.

They are suitable for  low rise structures, lightweight transportable and modular buildings and traditional built on site construction methods.

They are suitable for use in most TC2 and TC3 ground classification with appropriate structural design to suit the site specific requirements.

Groundscrews work as a single, or grouped cantilever pile system and can also be used as a spot footing for pile extensions and posts.

The specification of the StopDigging groundscrew system has been simplified as part of the CodeMark accreditation, and has removed the need for producer statements.

The StopDigging groundscrew system is specified by an LBP Designer for projects within the scope of  the StopDigging Design Guide, without further structural engineering input.

An LBP Designer needs to simply provide pile design loads and a connection detail on the subfloor plan — these are taken from the table in Appendix 2 of the Design Guide for structures within this scope. ( 3604/Nash )

For all other types of buildings, a CPEng will provide a pile design load calculation package based on the structure, and the Designer will include this in the documentation.

The Designer or Engineer provides a completed Design Declaration form as part of a building consent application. StopDigging provide an Installation Declaration and formal pile test report on completion of the foundation.


Limitations on Use

Where ground conditions are subject to liquefaction potential or slope stability issues, a CPEng needs to provide a pile design load specification in conjunction with the recommendations of the geotechnical report.

Groundscrews are not suitable for use in solid basalt/granite bedrock, but softer rock like sandstone/mudstone is suitable with appropriate pilot drilling.

Groundscrews are not suitable for founding into soft organic material/peat as a load bearing strata, but can be used to pile through into stable ground below.

NZS 3604 Corrosion Zone D suitable
Corrosion Exposure Zone D
NZS 3604 Earthquake Zone Very High suitable
Very High Earthquake Zone
NZS 3604 Wind Zone Extra High suitable
Extra High Wind Zone
NZS 3604 Wind Zone Specific Design suitable
Specific Design Wind Zone
Statement of Building Code Compliance

The StopDigging groundscrew system is certified with a CodeMark certificate and complies or contributes to (where used as part of a system) the following performance clauses of the New Zealand Building Code:

  • B1 Structure: B1.3.1, B1.3.2, B1.3.3 (b, f, g, h), B1.3.4
  • B2 Durability: B2.3.1 (a), B2.3.2 (a)
  • F2 Hazardous building materials: F2.3.1

See CodeMark Certificate CMNZ10132 for full information.

In-Service History

StopDigging have completed thousands of projects for this application around New Zealand since inception in 2017.  

The network of StopDigging companies around the world have installed hundreds of thousand of ground screws for a variety of applications in Europe, USA, Canada and Australia and the South Pacific.

Technical/Design Manual


StopDigging! Design Guide


Design Pathway


CodeMark: StopDigging! Ground Screw Foundation System

CMNZ70132 (Version: Aug 2023)

The StopDigging groundscrew foundation system is a CodeMark certified and highly sustainable pile system for multiple applications.

Product Enquiries

News from StopDigging!

StopDigging Groundscrew Foundation System Keeps Multi-Unit Project On Track
Introducing a Zero Waste, Low Carbon Footprint Foundation System NEW
Get a free weekly digest of essential news

New and updated architectural products, design solutions, inspiration, technical advice and more when you sign up for EBOSS.