Excavation waste is collected in almost every construction project, but is usually disposed of in a wasteful and space-intensive manner. BC Materials has developed three clay-based construction products that can be produced from excavation materials. The products are CO2-neutral, can be reused or recycled, and have multiple positive effects on the climate and insulation in buildings. They are sold online or produced-on site with a mobile unit to reduce transport.

Construction almost always includes the removal of ground materials to create foundations, basements, and similar works. Within the city of Brussels alone, those materials amount to more than 1.5 million tons per year, most of which is dumped in landfills outside the city. This is a loss of materials, and a problem for the city, which has to offer space to dump those materials.

The Belgian Cooperative for Materials' initiative Terres de Bruxelles uses the ground material excavated in construction to create construction products. Those products are based on sand and clay, which don't require blasting and can be reused or recycled in a closed loop to create new sand and clay products. BC Materials offers three different products created from excavation materials: brick, a plaster, and a stamped clay products that can be used similarly to open concrete.