Framing for panels, in particular for sliding panels, which may or may not be sliding windows, arranged to enclose and hold one or more single or multiple parallel glazing units, and having at least one frame in two parts formed from profiled parts and assembled so that their relative position can be modified, each of the profiled parts having at least one longitudinal wing which enclose a glazing unit, wherein each of the profiled parts has at least one pair of parallel transverse wings, namely an upper transverse wing and a lower transverse wing respectively, at least partially fitting around at least one insulation element, and in that the transverse wings and the insulation element are configured to ensure the connection of the parts of each frame, the width of the insulation element being adjusted at the time of mounting according to the thickness of the glazing unit or units.