Howdy all. Anyone know anything about concrete? I need to put some down in my new workshop. There are rectangular areas which already have concrete flooring, and other rectangular areas which are just earth/chalk (what was there before has been removed with a JCB). Now, who can tell me something about concrete? Whats the cheapest way to get the job done? (Mix it myself / get a lorry load delivered/poured in) I'm looking at between 50 and 100 square metres. How thick should I make it to e