Seriously,a written typed quote,
is vat included or extra,
type of finsh required, painted, bare plasterboard,etc,
Fire doors positioning and staircase adaptions, along with mains powered smoke alarms on all floors,electric, sockets lights etc,
insulation,
Details of public liability, in case he burns your house down,drops tiles on your car it does happen,
Previous experience of this type of work,
number of men going to be on site, you need to know how many cups of tea to provide,
Hours of work, access points to roof, neighbour problems,parking,party wall working if semi or terraced house,
Cost, and what if costs overrun,
Roof lights for fire escape route, building control, planning permission,
Payment staging,
How long to do job and when can they start.
Finally, do you like him, can you and your boyfreind bare to have him in your house 8 hours a day with his workmates.
oh and dont have a fear of dust and rubble.