Since using crushed concrete/brick rubble as a substrate on roofs we have tried the materials as a mulch and a wall infill, as in these photos. We think it gives an interesting backdrop to natural/prairie planting as well as providing an important habitat.

Brown field sites can be very important for wildlife, especially invertebrates. Many of these sites will be lost to the Thames Gateway Development. Using crushed concrete in our work, we hope to highlight this problem and provide some 'mini brown field sites'.