Abstract: An external revetment panel for the thermal insulation of buildings. The panel comprises a shell having upper and lower edges in parallel stepped relationship with the surface, the depth of the lower step being smaller than that of the upper step, the edge of the upper step being bent into a channel section, and the web thereof being formed with holes; gapping means provided on at least one of the stepped edges of the panel; at least one bracket fixed to the free flange of the channel section; and a layer of insulating material fixed to spacing means which are in turn secured to the internal surface of the shell.