Roof conductor holder for attaching additional air-termination devices such as air-termination conductors or air-termination rods to metal roofs. Designed for clamped seam roofs (e.g. RIB-ROOF Speed 500 from Zambelli), with clamping block. When using two roof conductor holders (clamps/clamping block) tested for the corresponding roof profile, the lightning current carrying capacity is 100 kA (10/350 µs).