Aluminium is a relatively low maintenance solution for any facade application. Maintenance largely depends on the degree of exposure, location of the project, and the coating used on the blades. Generally, no cleaning is required; however a typical schedule could include a visual inspection every 12 months to ensure there are no adverse environmental effects.
Surface dirt/dust, spider webs, bird droppings, rain spots and other debris, while not harmful can be unattractive and reduce the visual impact of a facade. A soft bristle broom or brush can be used to wipe the facade. Water can be used to aid the process but do not use harsh chemical cleaners as in some cases, coated layers can be removed.
Industrial and coastal environments will require a more frequent maintenance schedule to inspect for salt, visual deposits etc.