Method and device for manufacturing ultralight cardboard structures having substantial mechanical stability

A process of manufacturing a cardboard building construction material, said process comprising providing said cardboard building construction material comprising a plurality of glued cardboard plies, wherein, the cardboard plies are rolled on a drum into a roll and wherein glue is circumferentially applied, and a cutter cuts the cardboard plies along cutting points from an outer diameter toward an inner diameter of the roll, thus permitting simultaneous cutting of the roll as the roll is formed, wherein further the glue is applied in strips such that no adhesive is applied in gaps a clearance from and on both sides of the cutting points thereby defining non-glued regions adjacent the cutting points between the strips so as to avoid fouling of the cutter with glue.