Salisbury Boxing, Levelling And Compacting December 20, 2011 robert.kaplan Leave a comment We encountered reactive soil of a type that I had never come across before. See the video below. http://phoenixbuildingrenovations.com.au/blog/wp-content/uploads/2014/03/Salisbury-Deck-3.1.mp4 The solution was to dig it out and fill up the hole with crusher dust, about 8 cubic metres altogether.