Silver1 Posted June 12, 2007 Report Share Posted June 12, 2007 Going to get my prefab slab (96 X 96 X 6) delivered next week to my house to sit my new tub on. The area has good drainage with a slight slope away from the tub. Am I ok sitting the slab directly on the ground or is there a need for the gravel under it for a base. Quote Link to comment Share on other sites More sharing options...
stomper4x4 Posted June 13, 2007 Report Share Posted June 13, 2007 First off your want the ground to be good solid ground. I think if anything you should at least use a little sand to make a nice flat and level place for the slab to rest. This way the slab well be supported evenly everywhere and that well help prevent the slab from cracking. I'm not talking about a thick layer of sand just enough to make a nice flat surface. You could use a 2x4 to screed the sand flat. Gravel would work also and would erode less. You can leave it just ground but it might be hard to get it perfectly flat. Quote Link to comment Share on other sites More sharing options...
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