Expanded Clay: Lightweight, Durable and Versatile

Expanded clay is a lightweight aggregate created through a natural process. It begins with high-quality clay, which is moistened, granulated and then fired in rotary kilns at temperatures around 1100°C. During firing, the clay expands into round, porous balls that are exceptionally light yet mechanically strong - ideal for a wide range of construction, infrastructure and landscaping applications.

Expanded clay offers an unique combination of properties:

• High Load-Bearing Capacity: Despite their low weight, the spherical shape and internal structure provide excellent compressive strength, making them suitable for earthworks and load-distributing layers.
• Thermal and Acoustic Insulation: Expanded clay insulates both heat and sound. It also retains heat, contributing to energy efficiency in buildings and infrastructure.
• Moisture Regulation: Thanks to their porous structure, the granules help regulate moisture and provide natural ventilation - ideal for applications such as green roofs and drainage layers.
• UV and Frost Resistance: They protect roof membranes from temperature fluctuations, UV radiation and mechanical damage, ensuring long-lasting performance in extreme conditions.
• Fire Safety: Expanded clay has the highest fire classification (A1 – non-combustible) and adds a layer of passive fire protection to construction projects.
• Chemically Neutral and Rodent-Proof: Breathable and inert, expanded clay is safe for use with plants, potable water systems and organic environments. It also deters rodents due to its texture and structure.
• Easy to Handle: The lightweight nature and round shape make expanded clay simple to transport, spread, or mix into various construction materials.

Common Applications
• Lightweight concrete and screeds
• Backfill for retaining walls and bridge abutments
• Drainage layers for roofs, sports fields and roads
• Green roofs and roof gardens
• Hydroponic and horticultural uses
• Insulating fill in floors and walls
• Prefabricated building elements

Available Sizes:
4-10mm round (320 kg/m3)
8-20mm round (290 kg/m3)
10-20mm round (300-400 kg/m3)
4-10mm crushed (224kg/m3)
0-5mm (500-600 kg/m3)
Other sizes (round and crushed) upon request. 

Expanded clay is small in size but delivers big performance. It combines durability, thermal efficiency, sustainability and versatility in a single lightweight solution. Whether used in large-scale infrastructure or green construction, it remains one of the most reliable and popular lightweight building materials available today.