In my opinion, it should be obvious that as a craftsman you should not smoke inside the house! At the latest, once the windows are installed, it should stop. Most employees are no longer allowed to smoke at the workplace. Then the craftsman can also go outside for that. Also, for fire safety reasons alone. On a construction site like this, there are often many flammable materials lying around that can catch fire from the embers of a cigarette or from a carelessly discarded or forgotten cigarette.