heating system and concrete prep

The plumber was here today finishing the heating system and being a complete jerk. He was rude, condescending and verbally abusive to me. He has been doing the job in small blocks of time at his request (e.g. Can I come over for an hour?) and then blames me because it is an inconvenience to him. He is really a horrible person in addition to being a bad plumber. I've been pretty lucky though, he's the only bad egg of everyone I've worked with.

I spent 4 hours at Home Depot this evening getting ready for pouring a sample of the concrete countertop. I wasn't able to finish, so we'll have to go back again tomorrow.