Rough walls, pipes and cables can lead rats to upper floors. Height alone does not protect a flat.
Roof rats are agile climbers. Inspect ledges, brackets and pipe runs that connect to your balcony.
A decorative cover may hide a larger gap. Ask maintenance to inspect and repair the opening.
Trees near balconies provide another approach. Arrange safe pruning through building maintenance; never lean outside to inspect.
Scratching may be far from the entrance. Use existing access hatches and arrange professional inspection.
Use durable repairs around pipes. Preserve ventilation and drainage. Coordinate removal before sealing animals inside.
Seal access, secure food and monitor fresh signs. Add a deterrent as another layer.