flag stone front poarch
I have a front porch using composite decking material. The frame is a 2 x 12 ledger and 2 x 8 from on 16 inch centers ( all treated) . Outer edge is treated 8 x 8 piers 8 ft centers with double 2 x 12 sill plate. all connections via simpsons. I would like to convert it to a flag stone porch. bu t am unsure of the decking to put under the flag stone - I was considering added intermediate 2 x 8, 3/4 plywood, waterbarrier, duradock and the flag stone.
sound ok ?