I represent a company called Uretek South Africa. Uretek uses deep injection non invasive civils technology to repair subsidence "soil stabilisation" in homes , warehouses, roads , rail, mines, etc.No need to move out as we drill holes in a grid pattern and inject an expanding polymer to the troubled area. Drying time is 15 minutes so minimal disruption can be expected. What normally takes weeks to repair conventionally we do in hours.