Cracking of prefab sandwich panels impact s not only the appearance of buildings aesthetically but has also consequences for the material durability, as well as the thermal and acoustic performance of the building envelope as a whole . The project investigates the possible causes of cracks from the design to the production stage, transport and final application and exposure. The study w ill focus on material related causes due to the different types of restrained shrinkage, considering also mitigation measures by shrinkage reducing/compensating admixtures, to design related factors and to environmental factors during transport and the service life of the elements. The actual study will focus o n the drying shrinkage as well as shrinkage m itigating possibilities. Restraining and environmental factors will be investigated experimentally and by FEA. The results of the project will be evaluated and concluded in a list of recommendations for mitigating cracking in sandwich elements.