Insulated Swedish slab (SZP) - a modern foundation solution
Construction technology is constantly evolving. One of the most innovative approaches in Sweden is the SZP foundation, an economical, quick-to-install slab foundation that includes thermal insulation around the entire perimeter and floor area from the start.
The SZP foundation is designed for residential houses without a basement, and it provides a finished "black floor" of the first floor with installed heating and necessary communications.
When to choose the SZP basis?
This technology is recommended by:
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In cold climates to reduce heat loss
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In areas with high groundwater levels
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For projects with underfloor heating
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For frame, panel or modular structures
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In areas with unstable ground where complex foundations would normally be required
SZP construction layers
The lower parts of the base are well thought out and carefully dimensioned:
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Concrete leveling layer
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Reinforcement (rods or mesh)
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Shock absorbing layer (e.g. foam or special membrane)
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Thermal insulation (in the entire base area)
All elements together form a compact, thermally insulated structure.
Expert advice
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The base layer (sand/gravel) should be 300–600 mm thick, depending on the bearing capacity of the soil.
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The top layer must be removed, but the construction level must be accurate
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The foundation pit should be larger than the perimeter of the slab - to ensure stability, leave gaps of ~ 50–70 cm
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Thermal insulation boards should be laid evenly - without adding adhesives later
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All pipes and communications must be placed before pouring concrete.
Price list (indicative)
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SZP basis: 130 – 150 €/m² + VAT
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The ideal solution if you want to combine foundation and insulation in one step
Why choose TPR?
TPR, as your cooperation partner, provides:
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Precision-manufactured designs with factory quality
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Energy-efficient foundations that reduce heat loss
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Technically proven solutions, not improvisation
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Support for your project - from planning to installation
