A panelling system and carrier therefor for covering a wall or ceiling in which the panels have inturned side portions on each side, one of which is turned towards the other side and then back towards the main panel to provide a rim. The other side portion has at its free edge, an arm turned away from the one side. The panels are supported by inverted U- or V-shaped cross-section carriers formed with notches which define hook shaped lugs. These lugs are inserted into the rims of the panels and the arms of the adjacent panels overlie these rims. A space is provided above the thus mounted arms so that the arms can be lifted thereby to allow the underlying rim to be disengaged for the removal of a panel.