We're going to create a shelf in our family room from marble salvaged from my wife's family's old soda fountain. The shelf will go under a passthrough window from the kitchen. We're going to get some barstools and use it as an area for eating, or as an area for buffet style service, with plates of snacks and maybe a slow cooker.
The problem: the marble is only about a foot deep. The question: has anyone ever extended a similar shelf, perhaps with a wooden spacer/support between the marble and the wall? Hoping to pick up another 2 or 3 inches of depth.