Urban flooding is becoming an increasingly urgent challenge as climate change intensifies rainfall patterns across Europe. In response, researchers and designers in Spain’s Valencia region have developed an innovative ceramic paving system that enhances water infiltration in urban environments, offering new possibilities for climate-adaptive design.

Rethinking Urban Surfaces

Unlike conventional paving materials such as asphalt or concrete, this system uses vertically placed ceramic tiles with deliberate gaps between them. These interstices allow rainwater to pass through the surface and infiltrate the ground below. Installed over layers of gravel, the system promotes natural percolation while filtering water through a porous structure.

The concept was initially developed through an EU-funded research project led by the Institute of Ceramic Technology (ITC) in Castellón, with early demonstrations implemented in public spaces in Benicàssim. More recently, the follow-up project Drainker has focused on refining and industrialising the system for wider application.

High Absorption And Water Management

Testing has shown that the paving can absorb up to 10,000 litres of water per square metre per hour, significantly improving drainage capacity in urban areas. While it is not designed to prevent large-scale flooding caused by overflowing rivers, it can play a crucial role in mitigating surface water accumulation during heavy rainfall.

Beyond water management, the system also contributes to improving water quality, as the filtration process removes certain pollutants during infiltration. This aligns with broader sustainable urban drainage strategies (SUDS), increasingly adopted by cities aiming to become more resilient to extreme weather.

Circular Use Of Ceramic Materials

A key aspect of the innovation lies in its material strategy. The paving system repurposes surplus ceramic materials with low commercial value, transforming industrial waste into a high-performance urban surface. This circular approach not only reduces material waste but also opens new market opportunities for the ceramic industry in the Castellón region.

Additionally, the system addresses urban heat island effects. By allowing water to infiltrate and evaporate naturally, it contributes to passive cooling in densely built environments—an increasingly valuable property for landscape architects and urban designers.

From Prototype To Practice

The Drainker system is now moving towards commercialisation, with interest from architectural practices and municipalities across Spain and Europe. Its compatibility with public space design—such as pavements, plazas and pedestrian zones—makes it particularly relevant for architects, landscape architects and urban planners seeking integrated climate solutions.

With partial funding from the European Regional Development Fund and regional authorities, the project demonstrates how material innovation, circular design and climate adaptation can converge in practical applications. As cities face more frequent and intense weather events, such permeable paving systems could become a vital component of resilient urban infrastructure.

Source & photos: Euronews