1. Apply moisture barrier such as house wrap to the exterior wall.
    Doing this will help protect the frame from water and keep the
    back of the stone veneer from being damaged.
  2. Apply a metal lath with galvanized nails or staples according to
    your local building code. This supports the mortar and provides
    a firm surface for the stones to attach to.
  3. Apply scratch coat, which is a sand and cement mortar mix, over
    the metal lath. Make sure the lath is completely covered with a
    thin level layer. Using a mason’s scratcher, scratch up the
    smooth. Most codes require the coat to dry 48 hours before
    applying the stone.
  4. Apply roughly 1/2" to 3/4” of mortar to the back of each stone
    piece, using a trowel, covering the entire back.  Butter one piece
    at a time, just prior to applying the stone piece. Starting at the
    top of the wall push the stone firmly into the wall. Push firmly
    enough so that mortar is squeezed out around the sides of the
    stone.
  5. If you plan to grout around the stone, us a grout bag. Much like
    icing a cake, fill the bag half way with mortar and on the corner
    of the bag cut a hole. Roll the top part of the bag down forcing
    the mortar out of the bag and into the joints. The hole in the bag
    should be approximately 5/8” wide. Make sure all joints and
    stone surfaces are left clean of excess mortar.

Note: If sliding or slipping occurs, the mortar may be too thin, or
perhaps you used too little or too much
Click on the pictures below to enlarge
.
Installation Process