For sloped or uneven terrain, you may need to level the site by excavating and retaining the area. Alternatively, an engineered steel or concrete base can be used to create a level foundation. Consult an engineer or builder for best results.
What backfill material should be used for in-ground installation?
The backfill material is a dry mix of cement-stabilised sand. Dpending on where this is sourced the ratio of sand to cement varies. Consult the