Planning a home extension, holiday home, carport or commercial building? Before construction begins, there is one essential question to consider: which foundation system is best suited to your project?
Although concrete remains widely used in construction, helical piles are increasingly recognised as an alternative for a wide range of projects, from residential buildings to commercial and industrial installations.
Fast installation, no excavation, minimal disruption to the site and adaptability to different ground conditions are just some of their advantages. But how do these two foundation systems compare? And how can you determine which is best suited to your construction project?
Explore our comparison to understand the key characteristics of each solution.
Foundations play a crucial role in any construction project. They ensure structural stability by transferring the loads of a building or structure into the ground.
Among the available foundation systems, traditional concrete foundations and helical pile foundations differ primarily in how they are installed.
Concrete foundations have been used for many years to support a wide variety of buildings and structures.
Depending on the project and the chosen foundation system, their construction may involve several stages:
This method is particularly suitable for structures requiring continuous footings, foundation slabs or below-ground structural elements.
However, concrete foundations may involve significant ground disturbance, especially on sites with restricted access, sloping terrain or established landscaping.
Helical piles are steel foundation elements, usually galvanised, that are installed directly into the ground using specialised equipment.
Their purpose is to transfer structural loads into the ground through the pile's anchorage and its interaction with the surrounding soil.
Unlike traditional concrete foundations, helical piles are screwed directly into the ground without the need for excavation, earth removal or concrete pouring.
Once installation is complete and the piles have been inspected and their load-bearing capacity verified, construction can generally proceed without waiting for concrete to cure.
This technology offers a wide range of applications, from residential buildings to commercial and industrial projects and specialised infrastructure.
Helical piles offer several characteristics that distinguish them from traditional concrete foundations.
Installation speed is one of the main advantages of helical piles.
While concrete foundations require several consecutive construction stages, helical piles can often be installed within a few hours or a single day, depending on the number of piles, ground conditions and project complexity.
Another significant advantage is that no drying or curing time is required. Once installation and the necessary checks have been completed, the piles can support their intended loads.
This helps streamline the construction schedule and allows other trades to continue their work sooner.
Traditional concrete foundations generally require excavation and ground preparation before concrete can be poured.
Helical piles work differently: they are screwed directly into the ground, without excavation or concrete.
This installation method eliminates the need for foundation-related excavation and the associated removal and disposal of excavated soil.
It is particularly beneficial on already developed sites, including gardens, landscaped areas, courtyards and locations close to existing buildings.
The construction site remains cleaner, ground disturbance is localised and the need for subsequent reinstatement work is reduced.
Not every construction site is easily accessible.
Narrow access routes, construction behind existing buildings or sloping ground can make it difficult to use the machinery typically required for traditional concrete foundations.
With suitable installation equipment, helical piles can be installed in areas with restricted access, including narrow passages and sites where conventional earthmoving machinery would be difficult to operate.
On sloping sites, helical piles can accommodate changes in ground level without requiring extensive levelling work.
However, installation feasibility always depends on ground conditions, structural loads and access for the required equipment.
Unlike cast-in-place concrete foundations, helical piles can, under certain conditions, be unscrewed and removed from the ground.
This is particularly beneficial for temporary, modular or adaptable structures.
For example, a structure can potentially be dismantled without the need to demolish substantial concrete foundations.
The ability to remove the foundation system provides an important advantage for projects where future flexibility in land use is a priority.
Preserving the site is another important advantage of helical piles.
Unlike a concrete slab or continuous foundation that covers a large surface area, helical piles provide individual, localised support points.
This makes them particularly interesting for projects in green spaces or on sites where limiting impermeable surfaces is important.
Other benefits include installation without concrete, no foundation-related excavation and localised disturbance to the surrounding ground.
To better understand the differences between the two systems, here is a comparison of the main factors to consider.
|
Criteria |
Concrete foundations |
Helical pile foundations |
|---|---|---|
|
Installation |
Several preparation and construction stages |
Fast installation |
|
Excavation |
Generally required |
Installed without prior excavation |
|
Waiting time |
Concrete setting and curing times must be respected |
No curing time required |
|
Load-bearing capability |
Depends on the concrete reaching the required strength |
Available after installation and verification |
|
Site access |
May require heavy machinery and suitable access routes |
Equipment suited to restricted-access sites |
|
Site cleanliness |
Excavated soil, materials and waste must be managed |
No excavated soil during installation |
|
Sloping ground |
May require additional groundworks and adjustments |
Can accommodate slopes and changes in level |
|
Ground permeability |
Concrete-covered surfaces restrict water infiltration |
Preserves natural ground permeability |
|
Removal |
Foundation removal requires demolition work |
Piles can potentially be unscrewed and removed |
|
Cost |
Project-dependent |
Project-dependent |
In summary: helical piles stand out for their fast installation, the absence of concrete and excavation under typical installation conditions, and their ability to adapt to a variety of site conditions.
However, the choice of foundation system must always be based on the specific technical requirements of the project.
Helical piles are not limited to small buildings or outdoor structures.
Thanks to their versatility, they can be used across a wide range of residential, commercial and industrial projects, provided they are correctly designed and sized.
For home extensions or timber-framed structures, helical piles can offer an alternative to traditional foundations.
Their installation makes it possible to work close to existing buildings without foundation-related excavation.
This is particularly beneficial where access is restricted or the surrounding site has already been landscaped.
Helical piles are also suitable for many holiday home, tiny house and modular construction projects.
Their fast installation allows foundations to be prepared within a timeframe compatible with the assembly of prefabricated structures.
The possibility of removal can also be an advantage for temporary buildings or structures that may need to be modified or relocated in the future.
Carports, pergolas, garden shelters, fences and other outdoor structures can also be supported by helical piles.
This can be particularly useful when existing landscaping needs to be preserved or available space is limited.
Helical piles can be used as foundations for certain support structures in ground-mounted solar photovoltaic installations.
Foundation design must take account of ground conditions and the forces acting on the installation, particularly wind loads.
Battery energy storage systems (BESS) require foundations designed to accommodate the loads and characteristics of their equipment.
Depending on the installation configuration, helical piles may provide a suitable foundation solution for certain supporting structures or associated technical equipment.
Their use requires a technical assessment that considers structural loads, operating conditions and project-specific requirements.
Helical piles can also be used for pedestrian walkways, pontoons, platforms and other infrastructure projects.
They can be particularly useful on sloping sites, in hard-to-access locations or in environmentally sensitive areas.
Installation without excavation helps preserve the site and minimise disturbance to surrounding areas.
These examples demonstrate the wide range of possible applications. Whether helical piles can support a particular structure depends primarily on correct foundation design, the loads involved and ground conditions, rather than simply the type of construction.
Durability is an essential consideration when choosing a foundation system. Whether using concrete foundations or helical piles, the foundations must maintain their performance throughout the intended service life of the structure.
Helical piles made from galvanised steel are protected against corrosion.
This protective coating helps extend their service life when installed in the ground.
However, their actual lifespan depends on several factors, including soil corrosivity, moisture conditions, steel properties and the characteristics of the protective coating.
It is therefore important to select a foundation solution suited to the specific conditions of each project.
Temperature fluctuations and freeze-thaw cycles can cause movement in certain soil types.
As with any foundation system, these effects must be considered during the design process.
Helical piles can be anchored at an appropriate depth to transfer structural loads into soil layers with sufficient bearing capacity.
Installation depth, pile geometry and ground conditions must be assessed to account for potential frost-related effects.
Proper design and installation are therefore essential to ensuring the stability and long-term performance of the structure.
Concrete foundations and helical piles share the same purpose: ensuring the stability of a structure. However, the most suitable solution depends on the specific requirements of each project.
Several factors should be considered when selecting a foundation system:
Helical piles offer numerous advantages, particularly in terms of installation speed, site accessibility and reduced ground disturbance. Their versatility makes them suitable for a wide range of applications, from residential construction to commercial and industrial infrastructure.
However, the choice of foundation system must always be based on the project's individual characteristics. Soil conditions, required load-bearing capacity and technical specifications are all determining factors.
A technical assessment helps establish project feasibility and identify a correctly designed foundation system that ensures structural stability and long-term performance.
Cost is naturally an important consideration when choosing a foundation system.
However, there is no universal answer to the question: are helical piles cheaper than concrete foundations?
Costs depend on several factors, including project size, ground conditions, structural loads and the equipment required for installation.
For concrete foundations, the overall budget may include excavation, materials, labour, machinery and the removal of excavated soil.
The cost of helical pile foundations depends primarily on the number and dimensions of the piles, the loads they must support and the characteristics of the ground.
It is therefore important to compare the total cost of the foundation works rather than simply the price of individual foundation components.
Eliminating excavation and soil removal, combined with faster installation, can provide economic advantages depending on site conditions.
These factors may also simplify construction scheduling and reduce the need for certain additional works.
The best way to obtain a reliable cost estimate is to request a tailored quotation based on the specific characteristics of your project.
At Vistech, we provide helical pile foundation solutions for a wide range of applications, from residential construction to commercial and industrial projects.
Through our network of Vistech franchise partners, we support homeowners and construction professionals throughout their projects, from identifying requirements to installing helical pile foundations.
Our approach involves assessing ground conditions, structural loads and technical requirements to recommend a suitable foundation solution.
Our goal: to provide reliable, durable foundation solutions that combine fast installation with no concrete or foundation-related excavation, while meeting the technical requirements of your project.
Planning a construction project and wondering whether helical piles are suitable?
Contact a Vistech installer in your area to discuss your project and request a tailored quotation.
Helical piles offer high load-bearing capacity and can support substantial loads, provided they are correctly designed and sized according to the project's requirements and ground conditions.
Their bearing capacity depends on several factors, particularly the pile type, installation depth and soil characteristics.
Like concrete foundations, helical piles can provide a reliable, long-lasting foundation solution when properly designed for the structural requirements.
Helical piles are suitable for a wide variety of soil conditions, including clay, sandy soils and sloping sites.
However, certain ground conditions, such as rock or buried obstacles, may require technical adjustments or an alternative foundation solution.
A preliminary ground assessment helps determine whether helical piles are suitable for the project.
Galvanised steel helical piles are designed to provide protection against corrosion.
Their service life depends on several factors, including soil corrosivity, installation conditions, the characteristics of the protective treatment and foundation design.
There is therefore no single lifespan that applies to every installation.
No. Unlike concrete foundations, helical piles do not require setting or curing time.
Once installation is complete, the necessary checks have been carried out and the foundations have been approved, they can generally support their intended loads without additional waiting time.
Yes, helical piles can be an effective solution for certain sloping sites.
They can be installed at different depths and combined with a supporting structure designed to accommodate variations in ground level.
However, feasibility depends on ground stability, structural loads and the project's technical requirements.
Not necessarily. Foundation costs vary according to the characteristics of the project and site conditions.
However, helical piles may offer economic advantages, particularly because they eliminate foundation-related excavation and soil removal and can be installed quickly.
When comparing the two systems, it is therefore important to consider the total cost of the foundation works to determine which solution offers the best value for your project.
What if you considered an alternative to traditional concrete foundations?
Helical piles offer new possibilities for construction projects. Their fast installation, absence of excavation under typical installation conditions, potential removability and versatility make them an option worth considering.
Whether you are planning a home extension, timber structure, energy installation or commercial infrastructure project, Vistech solutions can meet a wide range of requirements.
Find a Vistech installer near you and request a tailored quotation.