NOVELTY - The method comprises drying biomass to remove moisture from the biomass, heating the anhydrous biomass to roast the biomass, weighing the biomass using a weighing machine placed in a furnace, and controlling or reducing a temperature of the furnace when the mass of the biomass reaches a predefined value. The weighing step is performed continuously during the method. The controlling step is automatically performed using a control unit. The control unit is connected to the weighing machine. The drying step is performed at a temperature of more than 100 degrees C.    USE - The method is useful for roasting biomass in a furnace (claimed), where the biomass includes wood.    ADVANTAGE - The method is capable of roasting the biomass without degrading quality of the biomass, thus improving brittleness, shaping properties, hydrophobicity and friability of the biomass.    DETAILED DESCRIPTION - The method comprises drying biomass to remove moisture from the biomass, heating the anhydrous biomass to roast the biomass, weighing the biomass using a weighing machine placed in a furnace, and controlling or reducing a temperature of the furnace when the mass of the biomass reaches a predefined value. The weighing step is performed continuously during the method. The controlling step is automatically performed using a control unit. The control unit is connected to the weighing machine. The drying step is performed at a temperature of more than 100 degrees C, and the heating step is carried out at a temperature of more than 300 degrees C. The method further comprises maintaining the biomass at a constant temperature of less than 170 degrees C after the heating step, and cooling the biomass to a temperature of less than 40 degrees C. The drying and heating steps are carried out by injection of steam. INDEPENDENT CLAIMS are included for:    (1) an apparatus for roasting biomass in a furnace; and    (2) a weighing machine.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic perspective view of a weighing machine.    Deformable structure (2)    Holding plate (3)    Transmission rod (5)    Support (6)    Base of deformable structure. (7)