Abstract: A production method for a composite facade system with a front panel and a support layer, wherein the front panel has at least one coating surface, wherein the support layer comprises a filler, such as a lightweight filler, and a second reaction resin, the method having at least the following steps: inserting the front panel into a mold, pouring a mixture including the filler and the second reaction resin into the mold, curing the second reaction resin at a first curing temperature for a first curing time, and removing the composite facade system from the mold. The present disclosure further relates to a composite facade system.