Please Advise on Tipping the Guys
I had Marvin Ultimate windows installed last fall, and the guys did a great job. It's a small company, and the owner and 3 of his guys did the full tear out and installation of 5 windows. I paid in full immediately, but later a friend of mine said I was supposed to tip the crew (though not the owner). I felt terrible, cause I didn't know that! Now, the same guys are coming back for my kitchen windows, and I want to do the right thing. Is it customary to tip the crew, and if so, how much? It is a one-day job, but it will be all day.