I'm ramping up to install a new deck. Doing it in blue stone. I'm done with pressure treated or composite. Everything up here either rots or rusts within 10 years. Did some googling and found this cool system to install the stone. PVC heavy duty grates, roll a rubber mat over it and place the stone on top. Hardest part is leveling the joists so there's no stone wobble. Piers got delivered last week, lumber gets delivered next week. Ordered it early because I don't see lumber prices coming down in the near future. Most likely going even higher.