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Hi All.. I just installed a HS Grandee on crushed stone. I had the landscaper do the normal approach to compacting the foundation with process or whatever they call it and then had him set a small layer of crushed stone 3/4" for the finished look. The spa is almost completely level and only a minor smidge off in two corners...so so slightly. I now noticed this "NOTE" in the install manual and its got me worried about my foundation not being good enough. Can anyone comment on this or have any feedback ? Thanks... GROUND PREPARATION Your Hot Spring spa has been engineered to perform on all kinds of common yard surfaces. While a concrete slab is best for long-term use*, other foundations are acceptable so long as a level base is prepared prior to delivery. Three foundation base pictures, shown at right, represent examples of alternatives to a concrete slab for spas installed without gazebos or other accessories. *NOTE: A reinforced concrete pad at least four inches thick or a deck that is able to withstand more than 115 lbs. per square foot is required for the Vista and Grandee spas , and recommended for the ..."
