Abstract: A roof cladding panel is profiled in its longitudinal direction and stepped in its transverse direction and comprises two straight side edges (4, 5) which are connectable to adjacent panels, a lower edge (2) which is generally wave-shaped and connectable to an adjacent panel, and an upper edge (3) which preferably is straight and connectable to an adjacent panel. Two diagonally opposite corners (8, 9) of the panel are obliquely cut, and an upper cut corner of one panel is adapted to be matchingly assembled with a lower cut corner of another panel in a four-corner joint including also non-cut corners of a third and a fourth roof cladding panel.

Abstract: In this method a short pipe element (2) with a radially outwards directed bead (3) at its end rim (4) is inserted into a pipe, and a radially outwards directed bead (7, 8) is rolled in the other end (5) of the pipe element (2) and in the pipe (1), such that the pipe element is fixed inside the pipe. The pipe element (2) may before insertion into the pipe be provided with at least two radially outwards directed beads (9, 10), causing the pipe element after insertion to be tightly clamped and fixed inside the pipe, and the pipe element (2) may over a part of its outer surface be coated with a sealing material (13).