Decks, Patios, Porches and Docks - Slate patio

Hi everyone,
This summer we're planning on building a patio in the backyard. The yard already has a slate walk, made up of approx. 3'x3' pieces, that are about 2" thick (and really hard to dig up - dang zoysia grass!!) We plan on using these to make the patio, they are a really nice dark gray-purple color. I've never really done anything like this before, and was just wondering if anyone had any advice. Should they be cemented in place? What kind of foundation would be used? Etc.
thanks,
Rob

The first question is what type of exsisting ground do you have? For foundation-you need to account for appropriate drainage, usually anywhere from 2-4 of drainrock or URB (under road base) that has been compacted so it doesnt settle later. dont forget a french drain if needed. If you are unsure, check with a local stone retailer and see what they recommend for depth for the soil in your area. On top of rock you need 1-2 inches of sand so you can set your slate level with each other. First, create a border along patio edge. As far as setting them, it is up to you. You can use concrete (omit sand) to set them then "grout" in between the stone with more concrete after initial concrete has set ( you can even color the "grout"). or fill with dirt and moss? between stones, or mulch between stones, or sand. I have a neighbor who used small colored rock between stones. All of which will look nice. It just depends what you like and how much time you want to invest. Be creative.

I'm confused, won't the sand just settle into the spaces in the small stones? I'm talking about the 1 to 2 inches of sand placed ontop of the drainage stones.