To ventilate a roof slope covered with metal sheeting, a clear path must be designed from the inlet at the eaves to the outlet at the top of the slope. Readers should check whether, after installation, the actual airflow cross-section has been reduced by a sagging membrane, protruding insulation or undersized counter-battens. The membrane alone does not create air movement, and its vapour permeability does not replace the ventilation gap. It is also worth verifying that inlets and outlets are protected yet still open, and that obstacles on the slope do not interrupt the planned air path.

The frequency of inspecting a metal roof depends primarily on the specific material's instructions, the building's surroundings and weather events. It is worth checking whether an annual inspection is sufficient in the given conditions or whether additional checks are needed after a gale, hail or work by other teams. Maintenance includes cleaning and repairing identified damage, but does not mean automatic painting or tightening every screw. For a building under trees or in a demanding environment, the plan should match actual conditions rather than just the calendar.