An imaginative touch-up bar (2) for the arrangement of a building transition between a first building component, in particular a roller-guide rail, a laminated guide rail, a window bench, a window or door frame, a ruler or a beam, and a second building component, in particular a thermal insulation and/or a cleaning layer on a building wall and/or wall; includes a base area (4),where at the back of the base area (4) there is an expansion strip (20) with a delayed expansion, which extends in particular after the release of a containment area (34) to the rear, and where at the front of the base area (4) there is an intake area (16); where, in addition to the base area (4), a lateral anchor leg (22) is provided that moves backwards in relation to the main extension direction of the base area (4).
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