Fiber isolating structure for roofs

The utility model discloses a fiber isolating structure for roofs, comprising a plurality of first fiber isolating elements, second fiber isolating elements and fixing devices. The first fiber isolating elements are arranged side by side, forming a first layer. The second fiber isolating elements form a second layer. The fixing devices are used for fixing the first layer and the second layer to a roof; the first layer is located between the roof and the second layer. Fibers in the first fiber isolating elements are substantially oriented in a direction perpendicular to the surface of the roof; fibers in the second fiber isolating elements are substantially oriented in a direction parallel to the surface of the roof. Each fixing device comprises a sleeve and a fixing member; the sleeve penetrates the first layer and the second layer; one end of the sleeve faces the surface of the roof, and the other end thereof is provided with a flange; the fixing member penetrates the sleeve, with one end fixed to the roof and the other end connected to the flange. The fiber isolating structure isolates the roof of a building and ensures fire safety; an economic, efficient, durable and safe solution is provided.