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The issue of the foundation is one of the most commonly misunderstood aspects when planning a sandwich-panel garage or an insulated portable garage. Many people treat it as a minor detail, yet the quality of the foundation is crucial to the building’s stability, the precise fit of the panels and doors, and its long-term usability. A well-prepared foundation makes the work easier on the day of installation — and the difference is still evident decades later.
The sandwich-panel garage and the DELUX insulated A prefabricated mobile garage with a precision-engineered structure. The fit between the panels, the frame and the door is a matter of millimetres — and these fits will only be accurate if the foundation is accurate too.
The fund must:
If the base is crooked or out of alignment, this will be evident in the finished structure: the gate will not close properly, gaps will appear between the panels, and the horizontal and vertical elements will deviate from the design. It is difficult or impossible to rectify these issues retrospectively.
A DELUX insulated for mobile garages, for sandwich-panel garages We only supply solid concrete slabs. No strip footings, no concrete blocks — a continuous, even concrete surface beneath the entire base.
The reason for this is simple: an insulated structure requires tight, precise joints. The panels form a single structure from the base to the roof, every part of which requires uniform support. Where this is lacking, the structure will shift over time, the joints will widen and the insulation will deteriorate.
The solid concrete slab also has practical advantages:
Minimum thickness: 12–15 cm, reinforced, C20-grade concrete. For larger buildings, heavier machinery or intensive use, it is advisable to consider a thickness of 15–20 cm.
This is the point that most people overlook — and later regret.
A DELUX insulated The walls and roof of a mobile garage provide excellent thermal insulation, but if the concrete base is uninsulated, the building will constantly lose heat to the ground. The cold concrete slab causes significant heat loss in winter, which the heating system is unable to compensate for; the energy simply escapes downwards.
The solution: when preparing the base Lay XPS (extruded polystyrene) thermal insulation boards beneath the concrete, on top of the compacted layer, or it can even be installed in a layered configuration (bottom concrete layer, XPS insulation board, then top concrete layer). This step involves minimal additional cost during the foundation work, but pays for itself in the long term through savings on heating bills.
If you’re planning a heated garage or workshop, don’t skimp on the basic insulation. Please consult us in advance to ensure that both the design and the installation are carried out correctly.
For the sake of completeness, it is worth mentioning that there are other foundation solutions available, such as strip foundations and concrete block foundations. These may be suitable in certain cases, but it is important to understand their limitations.
Lard base In this case, a concrete strip is only laid beneath the main load-bearing points and the fixing points; the inner surface is finished differently. This may be an acceptable compromise for smaller, uninsulated storage units on a tighter budget, but even for a more substantial garage clad with trapezoidal sheet metal, it is worth considering a solid concrete slab instead.
Concrete bollards They offer an even simpler solution, particularly for smaller, lightweight buildings. However, this type of foundation is unsuitable for insulated buildings: it does not provide uniform support and the structure will shift over time.
We do not recommend either solution for DELUX insulated mobile garages or sandwich-panel garages. The precision and enclosed design of the insulated structure require a solid, uniform concrete slab.
When determining the dimensions of the foundation, one should take the garage’s floor area as a starting point, and allow for at least It must extend 10–20 cm beyond at the edge of the structure.
If you are planning to install a bottom kerb (drainage kerb) around the building, the dimensions of the foundation must be agreed in advance to ensure that the garage, the foundation and the kerb are all in proportion. In such cases, please be sure to consult us before placing your order.
The level of the foundation is critical for the building — but drainage around the building is also an important consideration.
Please note that:
If the site is on a slope or prone to water pooling, it is advisable to inform the installation team of this in advance.
The most important considerations regarding the foundations for DELUX insulated mobile garages and sandwich-panel garages:
The client is responsible for carrying out the concrete work. We can only schedule the delivery of the garage to coincide with a finished, set foundation.
If you have any questions about the dimensions of the base or the installation requirements, please get in touch with us — we’ll be happy to help you before you place your order.
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