I have a concrete patio elevated a few feet above the lawn. The patio is bordered by a brick wall (on 3 sides, with the house on the 4th) that extends higher than the top of the concrete of the patio by about an inch. Currently, the original owner's caulk has deteriorated, so rainwater flows down between the concrete and the brick, seeping through the bricks to weaken the wall and cause mildew.
In addition, the water pools and flows between the patio and the house, leading to moisture in my crawl space.
If I repair the caulk, I will have a 1-inch deep swimming pool, and the water has to go somewhere eventually.
How can I get this patio to drain to the lawn?
Ideas are appreciated!