Abstract: A method of a ceramic fibre lining to a furnace comprises forming strips of fibre by making transverse cuts through a ceramic fibre blanket in which the axes of the fibres are substantially parallel to the longitudinal axis of the blanket, said cuts being made at an acute angle to the major faces of the blanket, and arranging the strips on the furnace wall to be lined with a thus cut face against the said wall. The invention provides also furnaces lined according to said method and prefabricated lining modules having a backing and a lining made according to said method.