After the winter we had in New England, my new block retaining wall began to lean outwards (towards my driveway). I was told that it was due to poor drainage, ultimately causing frost to push the wall outwards. The company that built it came in last spring and tore it down completely and rebuilt it block by block. I talked with the foreman who told me they were adding alot more stone for drainage. It appeared that they did this. My concern is that I am going to experience the same problem after this winter. Any input?