Atlantic Water Gardens 4' Flexible Hardscape Basin - Manual (Page 5)

To secure the basin, place a solid bead of masonry adhesive along the top
course of the basin surround, with a generous dab also placed in the
pre-punched glue points in the basin flaps (Figure 5). Then carefully place the
next course of stone, ensuring that the flaps are pulled tight and there is no
slack in the basin. It is recommended that this course of stone overhang into
the basin 1 ½” in order to disguise the top edge of the basin (Figure 6). Allow
the adhesive the fully cure (as per manufacturer’s instructions) before
proceeding with additional wall construction.
1½”
5
Figure 6