In a word, yes, non-invasive foundation systems can be used on projects that require UK Building Control approval, as long as the proposed system meets the relevant foundation building regulations in the UK. Building control foundations do not require a specific type of foundation; the important consideration is whether the foundation provides sufficient structural support and safely transfers the building’s loads into the ground.
The suitability of the system depends on factors such as the building design, ground conditions and site. The JackpadⓇ system is the industry-leading example of a non-invasive foundation system developed for modular and relocatable buildings.
What Are Non-Invasive Foundations?
Non-invasive foundations are systems that have been designed to support buildings without extensive excavation or permanent changes to the ground. Unlike the more conventional concrete foundations, which involves time being spent digging, pouring concrete and then waiting for it to set, a non-invasive solution is installed either at or near ground level to distribute the loads of any structure more effectively.
This approach to building control foundations can minimise excavation, reduce ground disturbance and simplify installation. Many systems can then also be removed when work is completed, with the potential for components to be reused on future projects, making them a flexible and sustainable foundation option.
How Do Non-Invasive Foundations Work?
- Building loads are transferred through the foundation system: The foundation provides structural support and transfers its weight and loads safely from the building onto the ground below
- Loads are distributed across the supporting ground: Rather than concentrating the buildings weight on a specific area, these systems spread the load across multiple points for stable and effective support
- Ground-bearing capacity is critical: The ground conditions must be assessed to ensure they can withstand the proposed load safely
- Adjustable components can accommodate uneven ground: Wherever appropriate, adjustable components are able to compensate for variations in ground levels for a safer, more stable and level base
Does UK Building Control Allow Alternative Foundation Systems?
Yes, UK Building Regulations are designed to accommodate alternative foundation systems, as long as they meet the required standards for performance, safety and crucially structural calculations. In a general sense these regulations focus on what a foundation must achieve rather than insisting on one particular construction method. This means that using traditional concrete foundations is not a requirement simply because approval is needed.
The Government’s Approved Documents offer significant guidance on Building Regulations and how to meet them. In this case, Approved Document A is most relevant as it covers structural safety, foundation system design and other considerations like ground movement.
An alternative foundation system must therefore demonstrate that it is appropriate for the proposed building and worksite. This design should account for factors like structural loads, bearing capacity and ground conditions.
What Does UK Building Control Look For?
Structural Calculations
Structural calculations demonstrate that the proposed foundation systems can support the anticipated load of the building well-within safe parameters. They must take into consideration factors like foundation dimensions, ground conditions, structural loads and materials. These calculations act as evidence that the foundation design is suitable for safe working practices.
Ground Conditions
Ground conditions are an essential consideration during the assessment of foundation suitability. The Planning Portal specifically highlights load-bearing capacity and soil type as key, others include:
- Ground stability
- Existing ground conditions
- Potential ground movement
- Site-specific considerations
Building Loads
Building loads help to determine the capacity needed by the foundation system. Building weight, number of stories, proposed occupancy, specific point loads, imposed loads and where relevant, wind conditions. These factors determine how forces are transferred throughout the building and into the ground, making sure there is adequate support and stability for both short and long term project performance.
Foundation Design
The design of the foundations must also be considered as part of the overall building system, rather than viewed as an isolated product. Knowing how to choose the right foundation means they must work with the structure, ground conditions, imposed loads and other design elements. This ensures loads are transferred safely and consistently while maintaining the building’s stability and performance over multiple projects which makes it a more sustainable option.
Do Non-Invasive Foundations Need Building Regulations Approval?
Knowing whether building controls for any foundations require approval depends on the wider building project rather than just the foundation. First, it must be established whether the planned work falls within Building Regulations and if there are any exemptions.
Where the Regulations apply, the foundation forms part of the building work being assessed and must satisfy the relevant technical requirements. The approval route will depend on the nature and scope of the project. There is also the matter of planning permission considerations, whether development is acceptable, while Building Regulations focus on technical standards for construction and structural safety.
How Can a Non-Invasive Foundation Gain Building Control Approval?
1. Assess the Building
First establish the proposed nature of the building type, including its intended use and the loads it will likely need to carry safely.
2. Assess the Site
Review ground conditions, site access, drainage, other surrounding structures and any other site factors that could influence the designs.
3. Design the Foundation System
Choose the suitable foundation arrangement, including the required supports, their locations and overall configuration for the project.
4. Provide Supporting Engineering Information
Supply appropriate calculations, technical drawings, specifications and engineering details to demonstrate that the foundation design is suitable.
5. Submit as Part of the Building Control Process
Present the foundation design alongside the wider project information as part of the Building Control submission for review.
6. Building Control Assessment
The relevant Building Control Body examines the proposed work to confirm that it meets the applicable Building Regulations and technical requirements.
Is Jackpad Approved by Building Control?
JackpadⓇ has previously been involved with the LABC Registered Details Scheme, but this relationship ending in 2022 following the decision by LABC to remove the scheme entirely. This did not change the the need to comply with Building Regulations and the JackpadⓇ system remaining compliant with supporting calculations and testing evidence.
As a result of these measures, Building Control is determined on a project-by-project basis, taking factors like design, engineering information, building loads and ground conditions into consideration.
Are Non-Invasive Foundations Suitable for Permanent Buildings?
Non-invasive foundation systems, like JackpadⓇ are not necessarily temporary just because they can be removed. A building that has been designed with long-term or even permanent installation can be supported by a “temporary” foundation system. The important consideration is whether the chosen foundation solution is suitable for the building, site conditions, loads and intended lifespan.
Jackpad’sⓇ permanent-installation guidance explains how its system can provide long-term structural support on appropriate sites, while remaining removable when required.
What Are the Benefits of Using a Non-Invasive Foundation?
There are many practical benefits to non-invasive foundations, depending on the project and the site in question. Although they do not automatically make a system suitable for every project, these advantages include:
- Less groundworks will be required with reduced excavations
- Installation can minimise site disturbances
- Non-invasive solutions can be faster to install
- Means projects will require less concrete
- Simpler removal efforts
- Certain non-invasive foundations can be reused
- Can suit sites with challenging access
- Typically the ideal option for temporary, relocatable or modular buildings
When Might a Non-Invasive Foundation Not Be Suitable?
Non-invasive foundations are not suitable for every building or site. They may be inappropriate where the ground lacks sufficient bearing capacity, is unstable or subject to considerable movement. Projects with loads exceeding the system’s specified design limits may also require a different approach. Site-specific restrictions, access issues or unusual ground conditions can further affect suitability.
In some cases, conventional or alternative foundation methods may provide a far more appropriate and suitable solution. The right choice should always be based on suitable structural calculations and an assessment of the site, ground conditions, building requirements and expected loads before installation.
Non-Invasive Foundations vs Traditional Concrete Foundations
Non-invasive foundations can differ from traditional concrete foundations in installation, site impact and removal. They may require minimal excavation, little or no concrete and can potentially be installed more quickly with less ground disturbance. Some systems can also be removed and reused. Traditional concrete foundations typically involve excavation and more extensive construction work.
When deciding between the JackpadⓇ system vs concrete, both options depend on site conditions, building loads and structural requirements and must meet applicable Building Regulations.
Speak to Jackpad About Your Foundation Requirements
Not sure whether or not a non-invasive foundation could be suitable for your upcoming building project? The JackpadⓇ team are experts in helping you to understand the key requirements for your specific site, building design and proposed installation. Each and every project is different, so suitability must be assessed on specific conditions and the structural requirements involved.
Ready to discuss your Building Control foundation requirements? Then get in touch by calling 0116 286 69 66 or dropping an email to enquiries@jackpad.co.uk.
