Typical Wall Section

(WRB and weep screed is not required over some substrates.)

Materials

Sunset Stone – Adhered Concrete Masonry Veneer (ACMV) that complies with ICC-ES AC-51.

Masonry Sand – A washed and clean.

Cement - Type S or type N mortar or approved pre-mixed mortars.

Metal Lath – 2.5 or 3.4 galvanized diamond mesh or accepted substitute – as required by backing.

Weep Screed – corrosive resistant; see Part 2 of this instruction.

Water Resistive Barrier (WRB) – 2 layers grade D or allowed equivalent.

Backer Rod and Sealant

Surfaces must have surface integrity and be structurally sound to receive ACMV units.

Exterior Applications over wood or other surfaces not classified as a "water barrier"
shall have 2 layers of water resistive barrier. See Part 2 of these instructions.

Mortar: Type S or Type N should be a mix of 1 part of cement with 2.25 parts of masonry sand and
potable water. The same mix applies to the scratch coat, setting bed and the grout. Approved
masonry coloring may be added to grouting mortar.

Application of Sunset Stone Adhered Masonry Stone Veneer

1. Apply weep screed and ensure all required flashing and “other craft” paper is in place for integration.


2. Where WRB is required, apply 2 layers of WRB using appropriate corrosive resistant roofing nails or staples.


3. Apply metal lath to wood framing with corrosive resistant roofing nails or staples of sufficient length to
   penetrate wood framing a minimum of 1"; generally 1½" fasteners are required. Metal framing or panels
   require the use of appropriately sized self-tapping screws to penetrate the metal a minimum of 3/8". Lath
   edges must overlap a minimum of 1" vertically and horizontally and installed with cups pointing up (lath will
   feel rough as you run your hand up its face). Fasteners shall be spaced on 6" centers.


4. Apply a nominal ½" thick mortar scratch coat, forcing the mortar into and covering the lath. The scratch coat
   may be scored horizontally when it is thumbprint dry. Rehydrate the dry scratch coat with water to moisten it
   as the ACMV is installed.


5. Select, break or cut to shape, and fit the ACMV unit to where it will be installed.


6. Apply the mortar setting bed to the entire back of each ACMV nominally ½" inch thick and install it.


7. Fill in all joints between ACMV units using a grout bag. After joints have become firm to the touch, use a
   blunt instrument to partially rake out the joint. Gently finish smoothing and cleaning joints with a wire brush.
   Using a soft brush, remove all spilled mortar off of the ACMV before it sets.


8. Install backer rod and sealant to unlike material if required. Never power-wash the ACMV. Masonry sealer
   may be applied when desired following the sealer manufacture’s recommendations.

THINGS TO KNOW:

The proper order of installation of Adhered Concrete Masonry Veneer is: all other crafts including
flatwork, flashing and weep screed, water resistive barrier and any required additional flashing, lath,
scratch coat, ACMV units, grout, backer rod and sealants.

Weep screed is required at the bottom of your WRB. It is needed to direct any water that enters
your Water Resistive Barrier away from the wall at the bottom of the WRB. See the MVMA
installation guide pages 8, 11 and various drawings for proper spacing and specific applications.

All ACMV must have a 2" minimum clearance above hard surfaces such as roofs, patios or pavement
and a 4" minimum clearance above organic material or "grade". See page 8 and various drawings in
the MVMA installation guide.

Two (2) layers of Water Resistive Barrier is required on all ACMV installations that require WRB.
These layers can be 2 layers of grade D paper or 15 pound felt, 1 layer of grade D or 15 pound felt
paper and 1 layer of approved house wrap, or a combination of other approved materials. See the
MVMA installation guide pages 5, 6 and "summary table" for allowable combinations.

Starting at the weep screed, the upper layers of the WRB must overlap (like shingles) the lower
layers by a minimum of 2" horizontally. The vertical layers of WRB must be lapped a minimum of 6".
If other crafts have not left you paper or flashing to lap under so you can integrate into their water
barrier system, have this corrected before proceeding. Your WRB is required to lap with all other
crafts that touch your installation. See page 10 and various drawings in the MVMA installation guide.

Staples/nails/screws attaching lath must penetrate 1" into framing member behind the
sheathing and 3/8" through metal studs or panels; see installation guide for fastener specifications.
Lath must lap a minimum of 1" vertically and horizontally and installed "cups up". See page 8 and 10
of the MVMA installation guide.

A scratch coat is required over the lath and should be nominally ½" thick and can be scored
horizontally when it is thumbprint dry. The back of each ACMV unit must be fully buttered with ½”
of mortar and rehydrate the scratch coat. Firmly work the ACMV onto the scratch coat and sliding it
slightly back and forth with a slight rotating motion to set the ACMV. See pages 1-12
in the MVMA
installation guide.

Leave a minimum of 3/8" void between the ACMV units and unlike material. This void should be
filled with backer rod and sealant. See the various drawings in the MVMA installation guide.

Seal ACMV installed in areas that are prone to ice dams, excessive water, salt, de‐icing agents,
chemicals, or in areas where efflorescence is present or the ACMV may be damaged.

Sunset Stone, Inc. does not recommend exterior "dry stacked" (installed without mortar joints)
installation of ACMV in geographical areas where freezing and thawing is common. Dry stacking
ACMV products in this type of environment can decrease its ability to stay adhered. A very tight
mortar joint raked deep is a more stable alternative in these areas.

COPIES OF DETAILED INSTALLATION GUIDE and ESR2836:

This document is designed to provide minimum installation practices required to install Adhered
Concrete Masonry Veneer produced by Sunset Stone, Inc. A copy of detailed instructions for
installation of ACMV ("Installation Guide for Adhered Concrete Masonry Veneer") can be attained
from the Masonry Veneer Manufacturers Association via download at www.masonryveneer.org or by
calling Sunset Stone, Inc. at 303‐791‐1233. Familiarity with this installation guide is recommended.

Additional information including code references, ICC‐ES AC‐51 product compliance, and further
installation requirements are available through our ICC‐ES evaluation report ESR‐2836 and can be
attained from ICC‐ES via download at www.icc‐es.org, by calling Sunset Stone, Inc. at 303‐791‐1233,
or by contacting us through our website at www.sunsetstone.net.

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