Method for radon remediation of a building (1), in which air (3) is sucked out of the soil (4) adjacent to the building (3) by means of a suction device (5), in particular a fan or blower, and expediently into the above-ground exterior Environment (6) of the building (1) is derived - for this purpose, at least two spaced bores (8) penetrating the building wall (7) are initially created, which provide a fluidic connection between the adjacent soil (4) and the interior of the building (1), - whereby a suction line (10) is then passed through each bore (8), and - whereby air (3) is then extracted from the soil (4) adjacent to the building (1) through the suction lines (10) the building (1) is sucked in and this air (3) is then expediently blown out of the building (1) into the above-ground external environment (6), characterized in that in the suction lines (10) there is a dispenser Rrventile (22) are provided and by means of the shut-off valves (22) the volume flows flowing through the suction lines (10) are adjusted so that the gap (s) between the suction line (10) and the bore wall (13) of the housing wall (7) each by means of a sealant (14) is sealed to prevent building air from being sucked in, and the sealing means (14) has an elastic sealing ring (15) which surrounds the suction line (10) and which is joined axially in the direction of the bore (8) by a tensioning device (16) pressed and thereby pressed radially against the bore wall (13), and that the suction lines (10) are transparent at least in some areas in order to make the entrainment of liquid and / or solid material in the suction air flow optically recognizable.
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