The aim of the project is to increase the sustainability and circular economy in the production and use of OSB. Furthermore, the increasing stiffness of structural elements with OSB. The first output is OSB with a higher recycled content. Currently, the project co-investigator KRONOSPAN produces OSB with a recycled content of 10%. The aim is to increase the recycled content to 30 and 40%. The second output is a fastener to achieve a rigid in-plane joining of the OSB boards. The relative slippage of the boards reduces, for example, the reinforcing capacity of the wall elements. This can be prevented by gluing, but this is technologically, time and cost consuming. The aim is a fastener that is affordable and easy to apply. The consequence will be greater stiffness in lightweight buildings.