Building a brick patio without digging
I have watched a couple of home and garden shows recently where they have built a brick or stone patio without excavating. They create the outline of the patio with bender board, then fill it with a couple of inches of sand and place the bricks on top of the sand. This idea is intriguing to me because I'd like to put in a small brick patio in the corner of my yard where I have a seating area. However, I cannot dig down to excavate the area as there are too many tree roots in the area.
Has anyone ever built a patio in this manner? How has it held up? How do you secure the bender board so that it does not bow outward?
Any thoughts are appreciated. Thanks in advance!