Construction is one of the key sources of CO2 emission. One of the most used construction materials are bricks, with more than 5 billion being produced each year. Bricks are typically made of clay, which is a finite resource. However, the use of vast amounts of clay, high-energy use and CO2 emission mean that the industry needs more sustainable solutions. The ReMaBricks project, which involves a Danish brickwork and three world-leading universities from Denmark and one from Slovenia, aims to solve this issue. The Recycled Material Brick (RMB) is a brick that has superior properties over the traditional brick, is cheaper, more environmentally friendly, and helps tackle the growing problem of accumulated hard-to-recycle materials such as wind turbine blades and glass wool insulation. In fact, there is more glass fiber waste in the production of windmills than there is in the windmills being decommissioned. Fundamental in the project is the involvement of Vestas and Siemens Gamesa. The goal of this project to: - Replace at least 20% and up to 40% of clay with materials stored in landfills today, - Upcycle waste materials, that are hard-to-recycle, - Reduce the amount of clay used for 1m2 wall (from 252 kg in clay bricks to 176.4 kg in the RMB), - Reduce CO2 emission used for 1m2 wall by 25%, - Prepare a product that is DGNB certified, is 11.77% cheaper for both brick producers and customers and ready for market by the end of this 3-year project.