The installation aid 513 secures cut tile pieces at hip and valley areas against slip off. The installation aid is hammered to the cutting edge and attached to the sub-construction with the 40 cm long integrated wire. The drilling of the cut tile pieces is not necessary and short installation time on the hip and valley are guaranteed. The three-fold spring claw also provides secure hold on uneven surfaces or embossed letters on the back of the roof tiles. Different sizes of the installation aid also guarantee a problem-free fixing of thicker roof tiles. In addition, the installation aid 513 can be used as a suitable "replacement lug" in the case of beaver tail coverings.