The core activity of Ernest Tzaut & Fils SA encompasses four main areas:
1. **Transport**: The company provides transportation services for materials and products, including the provision of vehicles and the delivery of construction materials.
2. **Demolition**: Ernest Tzaut & Fils SA carries out demolition work, including the dismantling and disposal of buildings and other structures.
3. **Earthworks**: The company offers earthworks services, including site preparation, soil and material removal, and land shaping.
4. **Composting**: Ernest Tzaut & Fils SA operates a composting facility, where organic waste is treated and transformed into valuable products such as compost and soil.
Overall, the company focuses on providing services in the construction, environmental, and waste management sectors.