A method of making fibreboards by the dry method technique where a lignocellulose-containing fibre material is disintegrated into fibres which are dried and formed into a fibre mat which is hot-pressed. Binding between the fibres is obtained by means of a binder which can be added before or after drying. According to the invention the binder is added before drying and the fibres with the binder are dried to have a moisture content substantially lower than that moisture content in the material which is suitable for hot-pressing. After drying, moisture is added to the fibre material in a degree such as to attain the moisture content suitable for hot-pressing, whereby the tackiness of the binder, which has got lost to a great extent during drying, is restored.