Abstract: A panelling clip for fixing tongue and groove boards comprises a main body 14 to engage against the front face of the re-entrant flanges 26 of a channel 24. An integral plate 18 extends rearwardly from the main body 14 and has laterally projecting tabs 20 with sharp edges 21 to grip the rear faces of the flanges 26. A platform 13 integral with the main body 14 extends forwardly thereform and has downwardly projecting tabs 12. In use tongue and groove boards are placed against spaced parallel channels and clips are fitted and pressed into engagement with the board grooves alternating with the boards.