In order to improve recycling and achieve a circular economy, new ways to separate urban waste into clean, well-defined mono streams are being currently explored in the Netherlands. They can be applied to create innovative, green and safe building materials. This project bij Technical University Eindhoven aims to give a new purpose to waste materials -in this case wood- collected prior to incineration, by incorporating them in cementitious composite materials. First, the wood will be washed in order to remove some of the contaminants, which are known to be problematic when mixed with mineral binders. Subsequently, wood will be tested and process into excelsior fibers. Finally, wood-wool cement boards will be made with waste wood fibers and the properties of these boards will be measured and compared to the existing standards (BS EN 12089).