The aim is to compact down the back fill so there are no air pockets, and the material is solid behind the block wall. In the UK a lot of the soill is heavy clay so it is not really suitable.
Any stone chippings, gravel, or even light soil will be OK, and make sure it is well compacted down as you go.
Posted on May 23, 2006, 6:18 AM from IP address 86.128.2.60