Abstract: An insulating board, and a method for producing the same, wherein the insulating board is a mixture which includes discrete paper platelets having an edge length of 1 to 5 mm derived by comminuting newspaper or similar paoer free from any surface treatment or fillers and pretreated with an anti-rot additive, natural fibers having an edge length of 5 to 100 mm, an adhesive and/or a reaction promoter. There is also provided an apparatus for producing the insulating board which includes a cyclone separator with a dust remover at its top, a tangential inlet for a premix of the paper platelets, fibers and anti-rot additive, countercurrent flow nozzle for the adhesive and/or reaction promoter, a plurality of comb shafts and a star feeding lock, whreby underneath the star feeding lock further comb shafts are arranged under which there is a fall-shaft which opens into a molding station.