In this article, published on the INGENIO portal, we describe how Copernit carried out the waterproofing works for the underground cells used to store Non Valley apples, using ARCOFLEX membranes — high-performance bitumen-polymer systems designed for temperature-controlled storage, energy efficiency, and environmental protection.
From the Non Valley to underground storage: a model of environmental and productive sustainability
In the northwestern area of Trentino, between the Non and Sole Valleys, more than half of Italy’s apple production takes place.
In this unique territory — distinguished by its altitude, climate, and exposure — a consortium of sixteen cooperatives, uniting over 4,000 fruit-growing families, cultivates approximately 6,500 hectares of orchards, producing more than 400,000 tonnes of apples every year.
To reduce environmental impact and streamline the supply chain, the consortium adopted an innovative storage model: underground cells excavated within a dolomite mine, where apples ripen and are preserved in a natural, stable, and temperature-controlled environment.
The waterproofing project for the underground cells: challenges and Copernit solutions
In the fourth expansion phase, Copernit completed the waterproofing works for the new underground storage units, contributing to a project that now offers a total storage capacity of 40,000 tonnes.
The cells are located approximately 300 metres below ground level, exploiting the cavities left by mining activities in the Rio Maggiore dolomite quarry.
The project’s objectives were clear: to preserve the landscape, minimise land use, and ensure maximum energy efficiency in a technically demanding underground context.
The challenge of underground storage and waterproofing
Underground apple storage requires high-performance waterproofing systems capable of protecting structures from humidity, vapour, and water infiltration in a complex subterranean environment.
Inside the tunnels, thermal variations in the rock and the presence of groundwater demand a continuous and durable waterproofing system, ensuring stable environmental conditions over time.
Copernit’s bitumen-polymer membranes meet these technical requirements thanks to:
• high thermal inertia and resistance to temperature fluctuations;
• a continuous waterproof barrier preventing air and vapour leakage;
• effective protection against rock humidity and water infiltration;
• long-term durability and strong adhesion even in challenging environmental conditions.
ARCOFLEX: the bitumen-polymer membrane for extreme environments
For the construction of the underground storage cells, ARCOFLEX membrane was used — an elastomeric bitumen-polymer solution specifically engineered to guarantee waterproofing performance even under extreme conditions.
Main technical features
• 4 mm thickness providing excellent mechanical and chemical protection.
• Outstanding flexibility and adhesion, even at low temperatures.
• Fast and safe torch application, with reduced flame use.
• Smooth upper surface for improved durability and easy cleaning.
• Excellent ageing resistance, ideal for temperature-controlled environments.
• Versatile application in industrial structures, tunnels, and other underground settings.
Performance and advantages of the UNDERGROUND CELL system:
• Stable internal temperature (approx. 1°C).
• Effective humidity and vapour dispersion control.
• Long-term energy savings due to reduced cooling demand.
• Low maintenance requirements and enhanced system durability.
Energy Efficiency and Environmental Protection in Underground Storage
The underground cells take advantage of the natural rock temperature, approximately 12.5°C, and a controlled cooling system that maintains an internal microclimate of 1°C, ideal for apple preservation.
Over time, the rock itself gradually absorbs and releases cold energy, reducing reliance on artificial refrigeration and delivering significant energy savings.
Presented at the European Parliament as a model of environmental and economic sustainability, the project has yielded tangible benefits:
• Reduction of CO₂ emissions;
• Water savings through the use of geothermal systems;
• Landscape preservation, avoiding new surface constructions;
• Valorisation of the subsoil by reusing existing mining cavities.
Waterproofing to preserve: Copernit’s philosophy
The Non Valley underground cell project exemplifies sustainable innovation and stands as a benchmark for Copernit’s waterproofing systems.
Thanks to ARCOFLEX technology, the company once again demonstrates its expertise in ensuring protection, efficiency, and long-lasting performance in every construction context — even in the most demanding environmental conditions.
Through this project, Copernit reaffirms its vision of waterproofing as an integral component of building quality, combining technical reliability, energy efficiency, and environmental respect.
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For further details regarding performance, certifications, and other technical information, please refer to the ARCOFLEX Technical Data Sheet.
