One of the better pool builders that I've contacted to install my IGP, recommended that I install a 4" concrete slab before the paver installation. He said that all pavers will eventually sink. The only way to prevent them from sinking is pouring a 4" concrete slab and installing the pavers on top of the concrete. However, another pool builder said that doing this will create a mold and mildew issue because the pavers will not drain properly.
Any suggestions would be great!