Steps:
- Use a trowel to apply thin-set mortar to the rear of the stone-veneer pieces.
- Press the stone pieces to the concrete-block wall, then use a margin trowel to scrape away any excess mortar.
- At the wall corners, install pre-cut 3x3-inch stone corner pieces.
- After the mortar is fully cured, use a stiff-bristle brush to apply clear sealant to the stone.