Should you pay your friends for helping you out?

I have a friend that's been giving me a hand working on things around the house etc. It's usually a joint effort so it's not like I'm drinking a beer and watching him work. I don't know he doesn't like to think of a friendship as a monetary transaction and I kind of think he's right. Money always complicates things. Opinions?
Updates
+1 y
I just feel he helps me out more than I help him. He just doesn't really ask for help much though. I mean we pretty hang out and I buy him lunch for helping etc. We've been friends forever.
Should you pay your friends for helping you out?
Post Opinion