tiS ICC EVALUATION-.....::: SERVICE Most Widely Accepted and Trusted

ICC-ES Evaluation Report

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DIVISION: 04 00 OGo-MASONRYSection: 04 71 Oo-Manufactured Brick MasonrySection: 04 73 Oo-Manufactured Stone Masonry

REPORT HOLDER:

NATIVE CUSTOM STONE, LLC236 HIGHTOWER PARKWAYDAWSONVILLE, GEORGIA 30534-6193(706) 216-5545www.stoneveneermanufactured.com

EVALUATION SUBJECT:

NAnVE CUSTOM STONE

1.0 EVALUATION SCOPE

Compliance with the following codes:

• 2009 and 2006 International Building Codee (IBC)

• 2009 and 2006 International Residentia' Code'" (IRC)

Propertles evaluated:

Veneer strength and durability

2.0 USES

Native Custom Stone is used as an adhered, non-load-bearing exterior veneer on non-fire-resistance-rated wood-framed or iight gage steei stud walls, or concrete masonrywalls.

3.0 DESCRIPTION

Natrve Custom Stone is a precast concrete produd madeto resemble natural stone in color and in texture. Theconcrete is comprised of cement, aggregate, water,admixtures and coloring. The veneer units are molded andcured at the plant. The veneer unils are of variousthicknesses from 3" inch to 1.9 inches (19,1 to 48.3 mm).The average saturated weight of the installed veneer unrtsdoes not exceed 15 pounds per square foot (73.2 kglm').Recognized pattems of veneer and accents are:

• Castle Rock

• Rubble

• Ledge

• Stack

• Fieldstone

• River Rock

4.0 INSTALLATION

ESR-3246Issued October 1, 2011

This report is subject to renewal in one year

A Subsidiary of the Iniemational Code Council'"

4.1 General:

Installation of Native Custom Stone precast stone veneermust comply wrth this report, the manufadurer's pubiishedinstallation instructions, and the appiicable code. Themanufacturer's published installation instructions must beavailable at the jobsrte at all times during installation. Theveneer may be applied over backings of cement plaster orconcrete masonry.

4.2 Preparation of Backing:

4.2.1 Cement Plaster Backings: Cement plasterbackings may be applied over plywood, aSB or gypsumsheathing, supported by wood or steel studs; over openwood or steel studs; over concrete walls; and overconcrete masonry walls, when installed as described inSections 4.2.1.1 through 4.2.1.3.

4.2.1.1 Installation over Sheathing: For exteriorinstallations, the cement plaster backing must be installedover a water.resistive barrier complying with IBC Sections1404.2 and 2510.6 or IRC Sections R703.2 and R703.6.3,as applicable. Also, ftashing must be installed as requiredby 2009 IBC section 1405.4 (2006 IBC Sedion IBCSection 1405.3) or IRC Section R703.8, as appiicable, andweep screeds must be installed at the bottom of the stoneveneer. The weep screeds must comply wi1h, and beinstalled in accordance wi1h, IBC Section 2512.1.2 or IRCSection R703.6.2.1, as applicable. In addition, the weepscreeds must have holes with a minimum diameter of 3/18inch (4.6 mm) spaced at a maximum of 33 inches (838mm) on center, as required by Section 6.1.5.2 of TMS402lACI 530/ASCE 5 (Section 61.5.2 of ACI 530/ASCE5fTMS 402), which is referenced in 2009 IBC Sedion1405.10 (2006IBC Section 14059).

Studs must be spaced no more than 16 inches (406 mm)on center. Lath must be a corrosion-resistant, self-furred,2.5 Iblyd' (1.4 kglm'), diamond mesh metal lath complyingwith ASTM C 847, or a 1.4 Iblyd' (0.760 kg/m'), corrosion-resistant, woven wire plaster base complying with ASTM C1032. The lath must be fastened to the wall framing inaccordance with the minimum requirements of Section7.10 of ASTM C 1063, and IRC Section R703.6.1, asapplicable. In addition, fasteners must be spaced amaximum of 6 inches (152 mm) on center, must penetratea minimum of 1 inch (25.4 mm) into wood framing andmust penetrate a minimum of 3/, inch (9.5 mm) throughsteel framing. A scratch coat of Type S mortar (cementpiaster) complying with ASTM C 926 must be applied overthe lath to a minimum thick~ess of '/, inch (12.7 mm). Thescratch coat must be scoi'ed horizontally in accordancewith the manufaelurer's published installation instructions,and must be allowed to cure in accordance with IBC

/CC.ES Evaluation Reports ore not 10 be COn.flroed as reprnentmg aeslheti('J or 011)'other attnbules nol specifiea//yaddressed, nor are they to be cOIU/ruedas on endorsement of the subject of the N'JXlrt or Q recommendation for iLJ use. There is no warronly by ICC EVO/uolion Service. Inc., Qiprt:sJ or implied. asto any finding or a/Mr mailer ilt this "POrt, or W" to any product cm>etWi by 1M report

Copyright C 2009 P.ge10'3

ESR-3246 I Most \1I!dely Accepted and Trusted

Section 2512.6, priorto the application of the veneer units.

4.2.1.2 Installation over Open Studs: For exteriorinstallations, the cement plaster backing must be installedover a water-resistive barrier, flashing and weep screedsas described in Section 4.2.1.1. Studs must be spaced nomore than 16 inches (406 mm) on center. Lath must be acorrosion-resistant 3.41b1yd' (1.8 kglm'). 'la-inch (9.5 mm)rib lath complying with ASTM C 847. The lath must befastened to wall framing and the scratch coat applied asdescribed in Section 4.2.1.1.

4.2.1.3 Installation over Concrete Masonry: Theveneer units may be applied directiy to concrete masonrybacking without lath, provided the masonry surface isclean. VVhere lath is used, it must be corrosion-resistantmetal lath complying with ASTM C 847. or 1.4Ib1yd' (0.760kgJm'), corrosion-resistant, woven wire plaster basecomplying with ASTM C 1032. The lath must be fastenedto the wall in accordance with section 7.10 of ASTM C1063, and IRC Section R703.6.1, as applicable. Thefasteners must be spaced a maximum of 6 inches (152mm) on center vertically and 16 inches (406 mm) on centerhorizontally. The gravity load (shear) capacity and negativewind load (pull-<lut) capacity of the proprietary fastenersmust be justified to the satisfaction of the code official. Thescratch coat must be applied as described in Section4.2.1.1.

4.2.2 Concrete Masonry Backing: Concrete masonrywall surfaces must be prepared in accordance with Section5.2 of ASTM C 926, and IBC Section 2510.7, asapplicable. A~ematively, a cement plaster backing may beinstalled as described in Section 4.2.1.

4.3 Application of Veneer Units:

Prior to the application of the veneer units, the scratch coator other backing and the back of the veneer units must bemoistened in accordance with the manufacturer'sinstructions. A minimum 'r,-inch-thick (12.7 mm) settingbed of Type S morfar must be applied to the back of theveneer units, and the veneer units must be pressed firmlyin place, squeezing the mortar out around all veneer unitedges. Joints between veneer units must be grouted andtooled in accordance with the veneer manufacturer'spublished installation instructions.

5.0 CONDITIONS OF USE

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The precast stone veneer described in this report complieswith, or is a suitable alternative to what is specified in,those codes listed in Section 1.0 of this report, subject tothe following conditions:

5.1 Installation must comply with this report, themanufacturer's published installation instructions andthe applicabie code. In the event of a conflict betweenthe manufacturer's published installation instructionsand this report, this report governs.

5.2 The use of the precast stone veneer is limited toinstallation on walls with cement plaster or concretemasonry backings.

5.3 Expansion or control joints, used to Iim~ the effect ofdifferential movement of supports on the veneersystem, are to be specified by the arch~ect, designeror veneer manufacturer, in that order. Considerationmust also be given to movement caused bytemperature change, shrinkage, creep and deflection.

5.4 In jurisdictions adopting the IBC, the supporting wallmust be designed to support the installed weight ofthe veneer system, including veneer. setting bed andcement plaster backing, as applicable. At wallopenings, the supporting members must be designedto limit deflection to '1&Xlof the span of the supportingmembers.

5.5 In jurisdictions adopting the IRC, where the seismicprovisions of IRC section R301.2.2 apply, theaverage weight of the wall supporting the precaststone veneer, including the weight of the veneersystem, must be determined. When this weightexceeds the applicable limits of IRC SectionR301.2.2.2.1, an engineered design of the wallconstruction must be performed in accordance withIRC Section R301.1.3.

6.0 EVIDENCE SUBMITTEO

Data in accordance with the ICC-ES Acceptance Criteriafor Precast Stone Veneer (AC51), dated February 2008,(editorially revised September 2010).

7.0 IDENTIFICATION

Boxes of precast stone veneer units are identified with themanufacturer's name (Native Custom Stone), the patternname, the manufacturing date and location. and theevaluation report number (ESR-3246) .

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