A method for manufacturing a construction board includes mixing a first cement mixture comprising magnesium oxide and magnesium chloride, mixing a second cement mixture comprising magnesium oxide, magnesium chloride, a binding agent, and at least one filler, the second cement mixture being thicker in consistency than the first cement mixture, dispensing a first layer of the first cement mixture onto a mold, and dispensing a first layer of reinforcing mesh onto the first layer of the first cement mixture, the reinforcing mesh being sized to allow the first cement mixture to at least partially pass through the reinforcing mesh layer. The method may further include dispensing a layer of the second cement mixture over the first layer of the first cement mixture, dispensing a second layer of the first cement mixture onto the layer of the second cement mixture, dispensing a second layer of reinforcing mesh onto the second layer of the first cement mixture and allowing at least a portion of the second layer of the first cement to flow through the mesh, drying the cement based board.