Also remember, do not let them do any other part of your house except the part where they're supposed to do. If they don't like you, you'll be in deep trouble with "fengshui".

You may not believe it but having a fork or knife hanging from your roof tied pointing down to where you're sleeping, it gives extreme bad effect even if you're not a believer. You won't see it since it's behind the ceiling. There are also other stuffs but ... all i can just tell you is becareful while purchasing a house from owner and when repairing your house. Don't be too fussy as the contractor can change your house environment with little alteration without you realizing it.