Height changes everything
A slate near the eaves of a bungalow is straightforward to reach compared with leadwork behind a chimney on a tall terrace.
Conservatories and extensions
A roof below the work area can prevent normal ladder positioning. Access may need to bridge or avoid fragile surfaces.
Public side of the property
Scaffold near a pavement or road can involve additional practical arrangements. Ask the contractor what is included.
Use the access sensibly
Once safe high-level access exists, inspect adjacent details while it is there. That means looking, not manufacturing a list of extra jobs.