Abstract: Panels for coffered ceilings comprising cladding panels of sheet metal or similar material and a method for mounting such panels. Each cladding panel comprises an essentially flat principal surface enclosed by longitudinally running joining sections as well as at least one longitudinally running stiffening section bent at an angle to the principal surface. The joining sections are designed so that any chosen panel can be removed simply and without the use of tools, so that a good seal is obtained between the panels, and so that it is possible to draw apart these to fit certain dimensions. In addition, the panels should hook into each other and remain sealed even if they should expand and buckle downwards due to fire or some other reason.