Leca is initial letters for: Light Expanded Clay Aggregate.


LECA consists of small, lightweight, bloated particles of burnt clay. The thousands of small, air-filled cavities give LECA its strength and thermal insulation properties.

The base material is plastic clay which is extensively pretreated and then heated and expanded in a rotary kiln.

Finally,the product is sintered at about 1200 °C to form the finished LECA product.

Light expanded clay aggregate is producing in more than 20 countries with different brands name, some countries which produce aggregate with almost the same industrial way are as:

Italy, Denmark, Switzerland, Norway, Finland, U.K, and Iran with brand of Leca.

Russia, China, with the brand of Keramzite. France, Belgium and Portugal with the brand of Argex. Germany and Austria with the brand of Liapor.

Entirely Natural Product

LECA is an environment-friendly, entirely natural product incorporating the same benefits as tile in brick form LECA is indestructible, non-combustible, and impervious to attack by dry-rot, wet-rot and insects.

Natural Building Material

LECA is a natural material and a LECA building is a healthy building, so that is Leca has been used in competition projects for allergy-friendly, healthy homes.

Used as a thermal-insulation material in houses, LECA has been saving energy for more than 50 years, and is now a standard component in low-energy development projects all over the world.