LIDL FLAGSHIP DISTRIBUTION CENTRE
Lidl’s £85M+ distribution centre in Järvenpää, Finland, stands as a benchmark in sustainable logistics construction—receiving BREEAM Excellent certification. One of the critical factors in achieving this was the use of Leca® Lightweight Aggregate to meet structural and environmental goals.
The principles applied here mirror the growing demand in the UK for low-carbon, resilient groundworks in logistics hubs and infrastructure upgrades.
Geotechnical Challenges
• Complex ground conditions: varied strata including soft clay (up to 6m deep), moraine, and rock
• Need for settlement control at interfaces between reinforced concrete slabs and unpiled ground
• Sensitive light traffic routes across poor load-bearing soils
• Strict sustainability and carbon-reduction targets
FACTS
Application: Complex ground conditions: varied strata including soft clay (up to 6m deep), moraine, and rock
Material Used: 6500m3 of Leca® LWA (10-20mm)
Project Overview: Applicable to large-scale infrastructure, industrial/logistics parks, and green building initiatives
Geotechnical Solutions with Leca® LWA
Leca® LWA was specified as a lightweight, load-reducing fill in several key applications:
1. Transitional Wedges
Used to bridge the change in stiffness between piled slab foundations and adjacent untreated ground, reducing risk of differential settlement.
2. Load Relief for Light Traffic Routes
Provided structural support without overloading underlying soft clays, replacing more invasive and costly ground improvement methods.
3. Frost and Thermal Insulation
Leca LWA’s insulating properties protected building perimeter structures and buried utilities, enhancing durability and performance.
4. Drainage and Capillary Control
The capillary-breaking, free-draining nature of Leca LWA helped manage ground moisture and contributed to long-term pavement life.
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Why Leca® LWA Was Chosen
• Sustainable Material: Manufactured using natural clay and fired using renewable fuels where possible
• Lightweight: <5 kN/m³, enabling reduced loads on soft subsoil
• Thermal Insulation: Minimised frost heave risk and energy use
• Efficient Logistics: Bagged or bulk delivery options; easy placement
• Versatile: Used across multiple construction phases – from sub-base to pipe trench support
“Leca® LWA allowed us to eliminate the need for more expensive base reinforcements while also acting as frost insulation – improving both cost and sustainability.”
— Risto Riisiö, Geotek Oy (Geotechnical Designer)
Supply Chain & Execution
The Leca team worked closely with the main contractor (Fira Oy) and groundworks subcontractor (Graniittirakennus Kallio Oy) to ensure:
• Just-in-time deliveries to a 26-hectare live site
• Minimised need for on-site storage
• Reliable product availability aligned with construction sequencing
“Leca LWA gave us the performance we needed at the best cost. Smooth deliveries and reliable supply made a big difference in site logistics.”
— Antti Saikkonen, Site Manager, Graniittirakennus Kallio Oy
Outcomes for UK Practitioners
Benefit UK Application
Differential settlement control Ideal for retail/logistics units transitioning between piled and unpiled zones
Lightweight structural fill Suitable for highways, culverts, bridge abutments, green roofs
Frost/thermal insulation Applicable for all-weather performance in utilities and perimeter detailing
Sustainable construction material Contributes to BREEAM, CEEQUAL, and Net-Zero targets
Conclusion: Leca® LWA – A Proven Choice for Sustainable Ground Engineering
The Lidl Järvenpää project exemplifies how lightweight aggregate can be a strategic enabler in tackling complex geotechnical issues while staying aligned with carbon-reduction goals. With increasingly stringent environmental regulations and growing interest in climate-resilient construction, Leca® LWA offers a smart, adaptable solution for UK engineers and architects.
