This covers a handful of jobs that all sort of live in the same world as windows, cause they're all about the outside of your house looking after itself.
Soffit and fascia cleaning is one of them. These are the white boards under your roofline, and they go green and grimy way faster than most people expect, especially on the shady side of a house. Clean soffits and fascias make the whole front of a property look about five years younger, no joke.
Cladding cleaning is another one. If you've got render or cladding on the outside of your house, it picks up algae and black streaking over time, same as anything else exposed to Sussex weather. It's a bigger job than windows but it makes a proper difference to how a house presents from the street.
Conservatory roof cleaning rounds it out. Conservatory roofs get moss and algae worse than almost anything else on a house cause they're mostly flat or gently sloped, so muck just sits there instead of washing off. A clean conservatory roof lets a lot more light into the room below, which people notice straight away once it's done..