A method for the preparation of insulating material mats, comprising a) the provision of a first ground plant matter containing plant fibres and shives, wherein the plant fibres and shives are connected to one another at least in parts, b) provision of at least one binding agent, in particular binding fibre, d) preparation of a first layer of material made of the first ground plant matter containing plant fibres and shives in a first feed device, g) blending of the first ground plant matter containing plant fibres and shives with the at least one binding agent, in particular the at least one binding fibre, in particular in the air stream, h) if necessary, separation of dust and/or foreign particles from the mixture obtained according to step g), i) if necessary, intermediate storage of the mixture obtained according to step g) or h), j) discharge of the mixture onto a conveyor belt, forming a fibrous web, l) formation of a pre-web by means of at least one first non-woven former, in particular equipped with needles or pins, and/or by means of at least one non-woven disperser, in particular comprising or consisting of at least one pin roll, wherein the mixture is preferably fed by means of a first transport unit to the non-woven former or non-woven disperser, n) if necessary, in addition to step g), supplying of the pre-web, in particular strewing of the pre-web, with at least one particular binding agent, o) formation of a non-woven from the pre-web according to step l) or n) by means of a second non-woven former, containing a drum, in particular equipped with a saw-tooth wire, wherein the pre-web is fed by means of a second transport unit, containing at least one pair of rollers consisting of an upper and a lower roller or containing an upper roller and a feed table, to the drum, r) activation of the binding agent, in particular treatment of the non-woven obtained according to step o) with heat for the purpose of thermobonding of the binding agent, and application of pressure to the non-woven simultaneously or staggered in time, and u) separation of the bonded non-woven into insulating material mats, wherein the insulating material mats have a density in the region of 20 to 120 kg/m 3. a) the provision of a first ground plant matter containing plant fibres and shives, wherein the plant fibres and shives are connected to one another at least in parts, b) provision of at least one binding agent, in particular binding fibre, d) preparation of a first layer of material made of the first ground plant matter containing plant fibres and shives in a first feed device, g) blending of the first ground plant matter containing plant fibres and shives with the at least one binding agent, in particular the at least one binding fibre, in particular in the air stream, h) if necessary, separation of dust and/or foreign particles from the mixture obtained according to step g), i) if necessary, intermediate storage of the mixture obtained according to step g) or h), j) discharge of the mixture onto a conveyor belt, forming a fibrous web, l) formation of a pre-web by means of at least one first non-woven former, in particular equipped with needles or pins, and/or by means of at least one non-woven disperser, in particular comprising or consisting of at least one pin roll, wherein the mixture is preferably fed by means of a first transport unit to the non-woven former or non-woven disperser, n) if necessary, in addition to step g), supplying of the pre-web, in particular strewing of the pre-web, with at least one particular binding agent, o) formation of a non-woven from the pre-web according to step l) or n) by means of a second non-woven former, containing a drum, in particular equipped with a saw-tooth wire, wherein the pre-web is fed by means of a second transport unit, containing at least one pair of rollers consisting of an upper and a lower roller or containing an upper roller and a feed table, to the drum, r) activation of the binding agent, in particular treatment of the non-woven obtained according to step o) with heat for the purpose of thermobonding of the binding agent, and application of pressure to the non-woven simultaneously or staggered in time, and u) separation of the bonded non-woven into insulating material mats,