turned up to work this morning to tile a kitchen floor and hallway. walked through the door and all old adhesive was still on the floor. note on the wall said i have been told by someone at work that you can tile straight over it! this is after i went round and told him it all needs to be removed. i went and got some slc and went over the lot then left a note saying you owe me an extra £100 and i will be back next week as im too busy this week