I have a kitchen contractor who is doing a fantastic conscientious job on demo and reconstruction of my old kitchen. At the end of the job, I'd like to give him a tip (since the company he works for probably gets the bulk of the contract fee). What is appropriate? Have any of you contractors out there gotten tips?
He will be on the job for 3 weeks, working alone, with electrical and plumbing subs.
(I searched this page for "tips" and "gratuity" but didn't find anything pertaining to it.)