30% of the world’s waste is generated within the built environment. In order to reduce this, materials that are seen as waste could be reused within architecture and create new ways of designing for example by symbiosis between industries or implementing a circular economy. However, it is important to look critically at the additional process that is necessary to create new products from waste as some processes require a lot of energy that could potentially do more harm than good. Nevertheless, to reduce waste itself, the current process of producing materials should be tackled by reducing waste generation itself rather than using the waste that was generated. In the end it is important to look at the different possibilities per project and new ways of designing by using what is at hand rather than using more primary materials.