Some jobs the rough lasts more than a month. In that situation we bill based on AIA. Some tenant space work fixtures and or gear are supplied by tenant. We will install them. My guarantee only covers material supplied by us and workmanship.
I did say "misc" materials. I don't care if the owner furnishes fixtures/gear, however, my markup structure will be as if I had furnished these items.
It becomes an all labor job if I don't, and that is risky.