i got a call from a guy today who wanted me to come take a look at a wall he had built around a window well when his house was built...well when i got their the wall had sunk about 2ft from where it was originally intended. then come to find out who ever built the wall they built it while the over dig from the foundation was still settling, so give or take a few months after excavation. they didnt use any kind barrier behind the wall or any drainage. the wall is only about 4'ft tall so i dont think pipe is necissary but 3/8 behind the wall would be nice, by the way thats what they used for the base. i dont know about rebuliding this because they already have everything cut and putting it back would be a b*^%$. if i was called to do a job like this i would have told the guy to hold off until the ground settled, started with a nice base of #6 crused lime compacted then and geogrid behind the wall and 3/8 or crushed lime compacted for drainage. but i dont think its worth re building because it would be more hassle than its worth. it would be like putting a puzzl together. what do you guys think of this?