Tiling over outdoor pebble epoxy/resin coat
We are looking to install slate tiles on our outdoor patio. Currently, it has a layer of very small pebbles mixed with an epoxy resin. The pebbles frequently come loose and there are 2 or 3 visible cracks through the resin suggesting there may be some cracks in the concrete slab beneath.
One tile setter said he would put sealer/filler over the cracks, but set the tile right over the pebbles. The second tile setter suggested removing the pebbles and epoxy because the small gaps in the pebbles could lead to moisture build-up and sealing the cracks in the slab. We live in Florida and have a pool on the other side of the patio.
My gut tells me the first guy is just trying not to do the work of removing the pebbles and epoxy and that it would be a much better and cleaner install without the pebble and epoxy underneath. Am I overthinking or wrong?
Thank you. Your input is much appreciated.