A composite cladding panel 1 comprises a backing tray 2 and an external s kin 3 with a layer of foam insulation 4 therebetween. A plurality of spacers 10 are attached to the external skin 3. The spacers 10 are of top-hat form with mounting legs 41 for mounting to the skin 3 and a support 40 to which s ide edge clips 20 are mounted. The clips 20 have spaced-apart formations 21 that engage in corresponding side edge recesses 22 of tiles 5. The top hat s pacers 10 space the tiles 5 apart from the skin 3 of the panel so that the t iles 5 define with the skin 3 ventilation passageways 30 which can remove mo isture.
