Direct answer
What should you know first?
Pair exterior window cleaning with building washing when runoff from walls, roofs, signs, or upper surfaces would otherwise spot the glass. The normal sequence is walls first, nearby flatwork next, and exterior windows last. Combining the work is especially useful for storefronts, offices, managed properties, and whole-home exterior projects.
Sequence prevents rework
Water and loosened buildup move downward. Cleaning glass before the wall above it creates a second job. Completing the exterior from the upper surfaces down keeps the finished windows out of the runoff path.
Where the combination matters most
Storefront entries, office façades, multi-unit buildings, and homes with broad window exposure show the difference immediately. The exterior reads as one finished property instead of clean concrete beside spotted glass.
When window cleaning can stand alone
If the building and surrounding surfaces are already in good condition, exterior window cleaning can be scheduled independently. Recurring plans can also give glass a shorter interval than the building wash.