A robotized manufacturing cell of prefab -icated GRC (Glass Reinforced Cement) panels for construction industry has been deve oped by construction company Dragados , S.A. The main contribution of the developed s' stem is the automatic programming and control of the whole plant. As input serves the architect 's 3D-drawing of the building facade done on a CAD system. From the CAD de!.ign, the optimum facade to pan-Fig. 1 Typical facade using GRC panels els.partition is c btained. In order to manufacture each panel , au omatic task and path planning are performed or the equipment present in the manufacturing cell: spraying robot, PLCs, control computt r, etc. Construction pt ocesses done off-site are more suitable to be-obotized , since the work takes place in a strut tured environment. A common off site process is the manufacturing of prefabricated par.els (Fig.l) which are later assembled on-site. In last years one important material used L L this kind of industry has been the Glass Reinl)reed Cement (GRC). The GRC material is based on mixing cement with small cut glass fiber strips, achievinenough flex-C, strength while maintaining light weight. This allows to manufacture large panels (6 x 3m) of any 3D geometry with the advantage of easy transportal ion and easy assembly on site.