The roof-ridge-sealing strip has a central air-permeable zone (8) of fabric structure, and two edge areas (9) adaptable to the corrugations of the tiles by stretchable stabilising inlay(s) of metal or other material.The strip is in one piece of fabric extends for the full width, and is extensible in the lengthwise direction at least at the edge areas. The inlay has undulating wires or strips running parallel to the edge (10'), and which are secured to the fabric surface in a holder allowing variation of the undulating pattern.
