I have a brick patio that is not level and filled with weeds. There are areas where it slopes down and the back up. I live in Maryland so it can get really hot and cold but I have not seen other areas of the lawn buckle like this.
I have pulled up the bricks on my old patio and found a 5-6 inch layer of sand (no stones) on top of the soil. (brick , then sand, then soil)
Do I need to remove it, and then put down (crushed) stone before I do the rest of the work? It will be a lot of sand to remove!
Most of what I have read suggests small/crushed stone (4 inch layer) on the soil followed by a weed barrier, then a layer of sand (1 inch). I am not sure what to do about the sand.