Do you tip labourers/contractors?

Posted by CMDoet@reddit | AskUK | View on Reddit | 14 comments

We have roofers in at the moment. They gave us a quote, we accepted. The main guy is a mate of a family member. I haven't really had to call on folk in professions such as these before (first house). Is it the done thing to tip them? Is it expected/usual practice? If you are in such a job, what is your experience?