Simple ideas often last longer. LECA® LWA is basically made of freshly excavated clay, and produced through pre-treatment and high temperatures. 1m3 of fresh clay produces 5m3 of durable, natural aggregate. To be used in anything from flower pots to structural concrete bridge elements in harsh Northern seas. Focus on a resourcefully efficient production process is always maintained with the attention on producing as little waste as possible in the process. Strict quality control is in place in all our production plants to deliver high quality products with minimal environmental impact.