Well, we are having a patio poured and I am requesting recommendations on the depth of the pour. The same guys put in our 70 foot sidewalk and foundation for our shed (22 X 18 feet) and they are 5 inches deep. What do you recommend a plain patio be? 5 inches as well? Less or more? We will have a picnic table and grill/chairs on it, approx. 12 feet X 12 feet.