A siding system has elongated stringers, each having a plurality of clips spaced at regular intervals along its length. In use, the stringers can be mounted upright, spaced apart and parallel, on an upright wall, and aligned so that the clips are in horizontal rows. A siding panel has a plurality of elongated connectors, spaced apart and parallel, on a rear face, in use, the panel can be mounted upright, with the connectors horizontal, and each connector engaged in the clips of one of the horizontal rows of clips so that the weight of the panel is supported by the clips of a plurality of the horizontal rows of clips through the connectors.