Plan to lay 5 cm of yard gravel on a patio. We are now wondering how to proceed with the groundwork. There is already 15 cm of compacted crushed rock. I was thinking of adding a layer of 5 cm of macadam for drainage before placing the yard gravel on top. Now the builder has placed a landscape fabric between the crushed rock and the macadam. Feels unnecessary, or is it good? Wouldn't it be more stable if the macadam were laid directly on the crushed rock? Question 2, should the macadam be compacted with a plate compactor? Grateful for any response!