The building, and what it does to the job
In this neighbourhood this is overwhelmingly let and managed property. A landlord brief and an owner brief lead to different edge details on the same room. The figures set the cut list, not the other way round.
The addition is one room wide, so the run is a galley with a door at one end and a window at the other and no wall long enough for anything else. The galley run down a side-return usually measures longer than a slab will give us, so a join is designed in from the start and nested to land over a cabinet gable rather than wherever the material happens to run out. Older houses come off the bench with longer scribes.
Old masonry walls bow and the chimney breast is never plumb, so template on the finished plaster and expect deep scribes on both ends of the run.
Alcove pieces get cut oversize on both scribe edges, with the true wall angles carried on the template drawing rather than assumed. None of it is left for the fitter to grind out on site, since a polished edge cannot be put back once it has gone. The mitre is cut to the angle we found, not to ninety.
