SkyVac
SkyVac, based in Northampton, England, has been manufacturing high-reach cleaning systems for nearly twenty years. Their best-known products are gutter vacuums, which allow you to clear out gutters from the ground rather than having to climb up to them. They also produce inspection cameras that show what is up high from ground level, systems for roofs and facades, and telescopic poles capable of reaching great heights. It makes for a handy add-on service alongside window cleaning—after all, you are already on site.
