Compression Testing
Assesses how an installed ground screw performs under downward structural loads from the proposed building.
Ground Screw Load Testing
New Service from SIP Express
Ground Screw
Load Testing
Professional, site-specific foundation testing for SIP buildings, garden rooms, extensions and timber-frame structures.
Foundation verification
Confirm your foundation performance before construction
Ground screw load testing applies a controlled force to an installed test screw and records how it performs within the actual ground conditions at your project site.
The results provide measurable information about load capacity and movement. This can help your structural engineer assess whether the proposed screw size, quantity, depth and layout are appropriate for the intended building.
Test results can support structural calculations, foundation design and Building Control submissions where project-specific evidence is required.
Why test the actual site?
Ground conditions can vary significantly between properties and across different areas of the same site. Soil type, moisture, made ground, clay, fill material and underground obstructions can all affect how a foundation performs.
Testing services
Ground screw load tests available
The correct test method and target load should be confirmed by the appointed structural engineer for the project.
Uplift Testing
Measures resistance against forces attempting to pull the ground screw upwards or out of the ground.
Lateral Testing
Evaluates the performance of the ground screw when sideways forces are applied.
Project confidence
Benefits of ground screw load testing
Receive project-specific information before committing to the full foundation installation.
Confirms performance on the actual project site
Supports structural-engineering calculations
Helps determine the correct screw specification
Identifies variable or unsuitable ground conditions
Supports foundation design decisions
May support Building Control requirements
Reduces uncertainty before construction begins
Provides greater confidence in the foundation system
Our process
How ground screw load testing works
01
Project Review
We review your drawings, site details, proposed building dimensions and structural requirements.
02
Test Screw Installation
A suitable ground screw is installed within a representative area of the proposed foundation.
03
Controlled Testing
Specialist equipment applies the required force while movement and performance are measured.
04
Results Provided
Test information is documented for review by the appointed structural engineer.
Suitable applications
Testing for a wide range of projects
SIP garden rooms
Garden offices and studios
House extensions
Timber-frame buildings
Modular buildings
Cabins and annexes
Commercial structures
Sites containing made ground
Engineer-designed foundations
Important technical information
Ground screw load testing does not replace structural calculations, professional foundation design or any site investigation required for the individual project. The testing method, target load, acceptance criteria and final foundation design should be confirmed by a suitably qualified structural engineer. Building Control approval remains subject to the requirements of the individual project.
Planning a SIP project?
Send us your site address, drawings, proposed building dimensions and structural information. Our team will review the details and advise on arranging your ground screw load test.