Hung properly, with the wall prepared first. Most wallpaper failures are surface failures.
Colour Consultation
Colour chosen for the light and orientation of your actual rooms, not from a chart under showroom lighting.
Planned Maintenance
Repaint cycles planned by exposure so buildings are maintained rather than rescued.
Beyond a standard repaint
Not every painting job is a repaint. Some are about specification rather than application: getting a colour right in a west-facing Perth room, keeping a building on a maintenance cycle, or making good after water damage for an insurer.
These services are quoted the same way as everything else, in writing with the scope itemised, so there is no ambiguity about what is included.