Have gotten several paver estimates & some disaggrements/ options on "How to" prep footer vis a vis erosion. Would like suggestions on how to prep sub-base (4" stone & 2" sand) but primarily as to; How to set footer for paver installation on waterfront property with some erosion.? We tore up decking & note about 6 to 8 washed out (12" deep) areas of soil. We need to set a footer but how deep? If down to base rock, it could be below lowest tide level- or 3+ ft. Option would be to form & pour OR set concrete block, 2 high (16"), secure(?) with 2 ea 3' rebars per block (set on inner side of block, backfill with stone, and cap with concrete to secure pavers over the footer. Since erosion is inevitable eventually, any suggestions are welcome?
Suggestions from soil engineers or paver experts are welcome, as project has yet to commense & proper prep maximizes end durability.