Can a Paver Sitting wall be put on a Paver Patio
Well chances are you can build a wall. If your patio was built right, it was placed on the proper amount of gravel. You would likely know if it was built on gravel if the patio is 5+ years old and it has not heaved much. As long as you are not building a wall higher than 4 or 5 layers, there should be plenty of strength. You should not need any other support for a shorter (5 layer) wall besides masonry construction adhesive between each layer.