B. ICC AC 11 Acceptance Criteria for Cementitious Exterior Wall Coating

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1 SECTION PORTLAND CEMENT PLASTER PART 1 - GENERAL 1.1 SUMMARY A. Section Includes 1. Fiber reinforced, one-coat three-coat stucco assembly with exterior rigid insulation, enhanced water-resistive and air barrier, optional crack resistance. 1.2 REFERENCES A. American Society for Testing and Materials (ASTM) 1. ASTM C144 Standard Specification for Aggregate for Masonry Mortar 2. ASTM C578 Specification for Preformed, Cellular Polystyrene Thermal Insulation 3. ASTM C847 Standard Specification for Metal Lath 4. ASTM C897 Standard Specification for Aggregate for Job-Mixed Portland Cement- Based Plaster 5. ASTM C926 Standard Specification for Application of Portland Cement-Based Plaster 6. ASTM C933 Standard Specification for Welded Wire Lath 7. ASTM C1032 Standard Specification for Woven Wire Plaster Base 8. ASTM C1063 Standard Specification for Installation of Lathing and Furring for Portland Cement Based Plaster 9. ASTM C1177 Specification for Glass Mat Gypsum for Use as Sheathing 10. ASTM C1278 Specification for Fiber-Reinforced Gypsum Panel 11. ASTM C1396 Standard Specification for Gypsum Board 12. ASTM E84 Test Method for Surface Burning Characteristics of Building Materials 13. ASTM E119 Method for Fire Tests of Building Construction and Materials 14. ASTM E330 Test Method for Structural Performance of Windows, Curtain Walls, and Doors by Uniform Static air Pressure Difference 15. ASTM G153 Standard Practice for Operating Enclosed Carbon Arc Light Apparatus for Exposure of Nonmetallic Materials B. ICC AC 11 Acceptance Criteria for Cementitious Exterior Wall Coating C.B. ICC AC 212 Acceptance Criteria For Water-Resistive Coatings Used As Water Resistive Barriers Over Exterior Sheathing D.C. ICC AC 219 Acceptance Criteria for Exterior Insulation And Finish Systems 1.3 SUBMITTALS A. Product Data: For each type of product indicated. B. Shop Drawings: Show locations and installation of control and expansion joints including plans, elevations, sections, details of components, and attachments to other work. PORTLAND CEMENT PLASTER

2 C. Samples for Initial Selection: For each type of factory-prepared finish coat indicated. D. Samples for Verification: For each type of factory-prepared finish coat indicated; 12 by 12 inches, and prepared on rigid backing. 1.4 QUALITY ASSURANCE A. Preinstallation Conference: Conduct conference at Project site. 1.5 DELIVERY, STORAGE, AND HANDLING A. Store materials inside under cover and keep them dry and protected against damage from weather, direct sunlight, surface contamination, corrosion, construction traffic, and other causes. 1.6 SITE CONDITIONS A. Substrate Temperature: Do not apply stucco assembly materials to substrates whose temperature are below 40 degrees F or contain frost or ice. B. Inclement Weather: Do not apply stucco assembly materials during inclement weather, unless appropriate protection is employed. C. Sunlight Exposure: Avoid, when possible, installation of the stucco assembly materials in direct sunlight. Application of finishes in direct sunlight in hot weather may adversely affect aesthetics. D. Do not apply stucco base coats or finishes if ambient temperature falls below 40 degrees F within 24 hours of application. Protect stucco materials from uneven and excessive evaporation during dry weather and strong blasts of dry air. E. Prior to installation, the substrate shall be inspected for surface contamination, or other conditions that may adversely affect the performance of the stucco assembly materials, and shall be free of residual moisture. 1.7 COORDINATION AND SCHEDULING: A. Coordination: Coordinate stucco assembly installation with other construction operations. 1.8 WARRANTY A. Warranty: Upon request, at completion of installation, provide manufacturer s Standard Limited Warranty. PORTLAND CEMENT PLASTER

3 PART 2 - PRODUCTS 2.1 MANUFACTURERS A. Basis-of-Design Product: Subject to compliance with requirements, provide Parex Armourwall WaterMaster HE Krak-Shield Stucco Assembly by Parex USA, Inc. or acceptable comparable product. 2.2 ASSEMBLY DESCRIPTION : A. One-Coat Three-Coat Stucco Assembly with Rigid Continuous Insulation and Enhanced Water- Resistive Barrier Coating with Crack Resistance: Liquid-applied water-resistive and air barrier with sheathing joint tape reinforcement, exterior rigid continuous insulation, wire fabric or metal lath, pre-mixed stucco base coat, fiberglass reinforcing mesh embedded in stucco leveling coat, and either an acrylic or elastomeric based finish coat. B. Stucco Functional Criteria: Stucco applied to vertical substrates or to substrates sloped for positive drainage. Slope substrates for drainage to provide additional protection from weather exposure harmful to coating performance. 1. Meet International Code Council Acceptance Criteria AC Performance Requirements of Water Resistive and Air Barrier Coating: WeatherSeal Method ICC and ASTM E2570 Criteria Results Accelerated Weathering /Aging Air Infiltration Air Leakage of Air Barrier Assemblies AC 212 ASTM E2178 ASTM E Cycles followed by Hydrostatic Pressure Test: No water penetration Calculated flow Rate at 75 Pa (1.57 lb/ft2, 0.3 in H2O) = < 0.02 L/m2*s (< cfm/ft2) Pass < 0.2 L / s m2 at 75 Pa) (< 0.04 cfm / ft2 at 1.57 psf) Pass: no water penetration < L/m2*s ( cfm/ft2) at 75 Pa (1.57 lb/ft2, 0.3 in H2O) Pass Air Leakage ASTM E283 No Criteria < cfm/ft2 Elongation ASTM D412 No Criteria 360% Flexibility ASTM D522 No Criteria No Cracking at ⅛ in (3 mm) Freeze-Thaw Resistance Hydrostatic Pressure Test Nail Seal ability, Head of Water Evaluation of Fire Propagation ASTM E 2485 AATCC 127 (Water Column) 10 Cycles Resist 21.6 in (55 cm) water for 5 hours before and after aging ASTM D1970 No Criteria Pass NFPA 285 In Accordance with IBC Chapter 26 Pass No Deleterious Effects No water penetration before and after aging Meets requirements for use on all Types of construction PORTLAND CEMENT PLASTER

4 Radiant heat exposure NFPA 268 In Accordance with IBC Chapter 26 No ignition upon 20 minute radiant heat exposure at 1.25 w/cm2. Pull off Strength ASTM D4541 No Water Penetration Pass: No water penetration Racking Restrained Environmental Structural Loading Surface Burning Characteristics Tensile Bond Strength ASTM E72 ICC ES AC 212 / ASTM E2570 ASTM E1233 Procedure A ASTM E84 ASTM E2134/ ASTM C297 Water Resistance ASTM D Days Water Penetration Water Penetration Water Vapor Transmission ASTM E331 ASTM E331 ASTM E96 3. Performance Requirements of Stucco Assembly: Deflection at 1/8 in (3.2 mm) 5 Cycles of wetting and drying 10 80% design load Flame Spread <25 Smoke Developed <450 Minimum 15 psi (104 kpa) 2.86 psf (137 Pa) for 15 minutes Tested after Structural Loading, Racking and Restrained Environmental Cycling at 2.86 psf (137 Pa) for 15 minutes Pass: No cracking at field, joints or flashing connection Pass: No cracking at field, joints or flashing connection Pass: No cracking at field, joints or flashing connection Flame Spread =0 Smoke Developed =0 Pass: All listed substrates and flashing materials Pass: No Deleterious Effects. Pass: 25.4 psf (1216 Pa) for 165 minutes No Water Penetration 12 Perms (Spray & Roll-On) 6 Perms (Trowel-On) Test Method ICC AC 11 Criteria Results Accelerated Weathering Freeze-Thaw Resistance Transverse Wind Load Resistance ASTM G Hours No deleterious effect ICC AC cycles Pass ASTM E330 Meet Design Loads Fire Resistance ASTM E119 One hour fire Drainage ICC AC % Refer to ICC-ES ESR Refer to ICC-ES ESR Refer to ICC-ES ESR Provide substrate materials and construction complying with applicable building code and requirements of authorities having jurisdiction Comply with ASTM E 2568 or ICC Acceptance Criteria AC 219 for EIFS Ensure substrates are sound, dry and free of dust, dirt, laitance, efflorescence and other harmful contaminants Substrate Dimensional Tolerances: Flat with 1/4-inch within any 10-foot radius Maximum Deflection of Substrate System: Under positive or negative design loads not exceeding L/360 of span. C. Expansion and Control Joints: Continuous expansion and control joints complying with requirements of ASTM C1063 and ASTM C926. PORTLAND CEMENT PLASTER

5 1. Design for substrate movement, and expansion and contraction of stucco and adjacent materials in design of expansion joints, including consideration of sealant properties, installation conditions, temperature range, coefficients of expansion of materials, joint width to depth ratios, and other material factors. 2. Comply with requirements of ASTM C1063 for expansion or control joints installed in walls not more than 144 square feet in area, and not more than 100 square feet in area for all non-vertical applications. Do not exceed 18 feet in either direction or length-towidth ratio of 2-1/2 to 1 for distance between joints. 2.3 MATERIALS A. Water-Resistive and Air Barrier over Sheathing: 1. Water-Resistive Barrier Coating: a. Parex USA WeatherSeal Spray & Roll-On; provide two coats on plywood and OSB. b. Parex USA WeatherSeal Trowel-On 100 percent acrylic, non-cementitious, trowelable water-resistive and air barrier. 2. Sheathing Tape: Parex USA 396 non-woven synthetic fiber tape to reinforce WeatherSeal Spray & Roll-On water-resistive barrier coating at sheathing board joints, into rough openings and other terminations into dissimilar materials. B. Stucco Base Coat (3/8-inch to 1/2-inch per coat):[2. Parex Fiber-47 Armourwall Scratch & Brown Sanded: Proprietary mixture of portland cement, and proprietary ingredients mixed with clean, cool, and potable water in the field. 1. Mixture of portland cement and proprietary ingredients mixed with clean, cool, potable water, and ASTM C897 or ASTM C144 sand added in field; Parex 210 Armourwall Stucco Base Concentrate. 2. Mixture of portland cement, and proprietary ingredients mixed with clean, cool, and potable water in field; Parex 202 Armourwall Stucco Base Sanded C. Stucco Admix: 100 percent acrylic emulsion additive for portland cement based products to enhance curing, adhesion, freeze-thaw resistance and workability and as an acrylic polymer bonding agent; Parex USA Adacryl Admix & Bonding Agent. D. Leveling and Reinforcing Coat: 1. Copolymer based, factory blend of cement and other ingredients requiring addition of water. Parex USA Stucco Level Coat percent acrylic polymer base, requiring addition of portland cement. Parex 121 Base Coat 3. Copolymer based, factory blend of cement and other ingredients requiring addition of water; Parex 121 Dry Base Coat. 4. Reinforcing Meshes: a. 4.5 oz/sq. yd. reinforcing mesh; Parex USA Stucco Mesh. b. 4.5 oz/sq. yd. reinforcing mesh; Parex USA 355 Standard Mesh. c. 12 oz/ sq. yd. reinforcing mesh; Parex USA Intermediate Mesh. PORTLAND CEMENT PLASTER

6 E. Expanded Polystyrene Features over Stucco: 1. Adhesive and Base Coat a. Copolymer based, factory blend of cement and other ingredients requiring addition of water; Parex 121 Dry Base Coat & Adhesive. b. 100 percent acrylic polymer base, requiring addition of portland cement; Parex 121 Base Coat & Adhesive. 2. Insulation Board: ASTM C578, ASTM E 2430 Type I, complying with Portland cement plaster system manufacturer s recommendations and requirements. 3. Reinforcing Mesh: F. Primer: a. 4.5 oz/sq. yd. reinforcing mesh; Parex USA 355 Standard Mesh. b. Reinforcing mesh used for back-wrapping and details; Parex USA 356 Short Detail Mesh percent acrylic based coating to prepare surfaces for acrylic or elastomeric finishes; Parex USA PrimeShield percent acrylic based coating to prepare surfaces for acrylic or elastomeric finishes; Parex USA QuikCure percent acrylic based coating to prepare surfaces for acrylic or elastomeric finishes; Parex USA Primer percent acrylic based coating to prepare surface for exposed aggregate specialty finishes; Variance VariPrime Sanded. G. Finish: percent acrylic polymer based finish, enhanced DPR acrylic finish with hydrophobic and photocatalytic properties, repels water, reflects UV rays, and reduces smog particles near finish surface; Parex AquaSol. a. Finish type, texture and color as selected by Architect. 2. Factory blended, 100 percent acrylic polymer based finish, integrally colored; Parex DPR Optimum Finish. a. Finish type, texture and color as selected by Architect. 3. Factory blended, 100 percent acrylic polymer based finish, integrally colored; Parex DPR Standard Finish. a. Finish type, texture and color as selected by Architect. 4. Factory blended, 100 percnet acrylic polymer based elastomeric textured finish, integrally colored; Parex E-Lastic Finish a. Finish type, texture and color as selected by Architect. PORTLAND CEMENT PLASTER

7 5. Acrylic-based specialty finish. Finish type, texture and color as selected by Architect. a. Factory blended, powdered oxide pigment blend for use with decorative coating compounds; LaHabra Color Pack. b. Water-based, tinted, semi-transparent, acrylic emulsion for staining, sealing, and protecting concrete, masonry and other cementitious substrates; Variance Antiquing Gel. c. 100 percent acrylic, water based sealer; Variance VariSeal percent acrylic, transparent, permeable, dirt resistant sealer protective coating over acrylic finishes; 600 Clear or 610 Matte Clear Parex USA Clear Sealer. H. Water: Clean, cool, potable water. 2.4 ACCESSORIES A. Substrate Materials: 1. Gypsum Sheathing: Minimum 1/2-inch thick, core-treated, weather-resistant, exterior gypsum sheathing complying with ASTM C79 or ASTM C Cement Board Sheathing, Minimum 1/2-inch thick, conforming to ASTM C Fiberboard: Minimum 1/2-inch thick fiberboard complying with ANSI/AHA A194.1 as regular density sheathing. 4. Plywood: Minimum 5/16-inch thick exterior grade or Exposure I plywood for studs spaced 16 inches o.c. and 3/8-inch thick exterior type plywood minimum for studs spaced 24 inches o.c. Provide plywood complying with exterior grade or Exposure 1 and with DOC PS Oriented Strand Board (OSB): 7/16-inch to 1/2 inch Wall-16 or Wall-24, approved by APA, TECO, or PSI/PTL. Stamped as Exposure 1 or Exterior Sheathing with a PS2 or PRP-108 rating. 6. Concrete Masonry Construction: Non-painted (uncoated). B. Lath and Accessories: Conform to ASTM C847, ASTM C933, ASTM C1032, ASTM C1063 and Appendix. 1. Accessories: Manufacturer s standard steel products with minimum G60 galvanizing unless otherwise indicated as rigid polyvinyl chloride (PVC plastic) or zinc alloy. 2. Lath Locks: Wind-lock Lath-lock steel washer. 1-1/4-inch diameter, 24 gage, galvanized steel mechanical fastening washer, with countersunk central through-hole, and four down-turned legs that prevent rotation during installation and keep mesh from slipping out from under the plate, or equal. 3. Metal Plaster Bases: Minimum 17 gauge self-furred stucco netting, minimum 2.5 lb/ sq. yd or 3.4 lb/sq yd expanded metal diamond lath, or welded wire lath in accordance with applicable codes and standards. 4. Weep Screeds: Foundation weep screed with minimum 3-1/2 inch vertical attachment flange. PORTLAND CEMENT PLASTER

8 PART 3 - EXECUTION 3.1 EXAMINATION A. Examine areas and substrates, with Installer present, and including welded hollow-metal frames, cast-in anchors, and structural framing, for compliance with requirements and other conditions affecting performance of the Work. B. Proceed with installation only after unsatisfactory conditions have been corrected. 3.2 PREPARATION A. Protect adjacent work from soiling, spattering, moisture deterioration, and other harmful effects caused by plastering. B. Prepare solid substrates for plaster that are smooth or that do not have the suction capability required to bond with plaster according to ASTM C INSTALLATION, GENERAL A. Fire-Resistance-Rated Assemblies: Install components according to requirements for design designations from listing organization and publication indicated on Drawings. 3.4 INSTALLING ACCESSORIES A. Install according to ASTM C 1063 and at locations indicated on Drawings. B. Reinforcement for External Corners: 1. Install lath-type, external-corner reinforcement at exterior locations. C. Control Joints: Install control joints in specific locations approved by Architect for visual effect as follows: 1. As required to delineate plasterwork into areas (panels) of the following maximum sizes: a. Vertical Surfaces: 144 sq. ft.. b. Horizontal and other Nonvertical Surfaces: 100 sq. ft.. 2. At distances between control joints of not greater than 18 feet o.c. 3. As required to delineate plasterwork into areas (panels) with length-to-width ratios of not greater than 2-1/2:1. 4. Where control joints occur in surface of construction directly behind plaster. 5. Where plasterwork areas change dimensions, to delineate rectangular-shaped areas (panels) and to relieve the stress that occurs at the corner formed by the dimension change. PORTLAND CEMENT PLASTER

9 3.5 PLASTER APPLICATION A. General: Comply with ASTM C Do not deviate more than plus or minus 1/4 inch in 10 feet from a true plane in finished plaster surfaces, as measured by a 10-footstraightedge placed on surface. 2. Finish plaster flush with metal frames and other built-in metal items or accessories that act as a plaster ground unless otherwise indicated. Where casing bead does not terminate plaster at metal frame, cut base coat free from metal frame before plaster sets and groove finish coat at junctures with metal. 3. Provide plaster surfaces that are ready to receive field-applied finishes indicated. B. Bonding Compound: Apply on plaster bases. C. Walls; Base-Coat Mix: Scratch coat for two-coat plasterwork. 1. Portland cement mixes. 2. Portland and plastic cement mixes. D. Plaster Finish Coats: Apply to provide float, dash, scraped trowel-textured, skip trowel-textured, brocade (knock-down dash), trowel sweep, combed, sacked (California mission), English, or marblecrete finish to match Architect's sample. E. Concealed Exterior Plasterwork: Where plaster application will be used as a base for adhered finishes, omit finish coat. 3.6 PLASTER REPAIRS A. Repair or replace work to eliminate cracks, dents, blisters, buckles, crazing and check cracking, dry outs, efflorescence, sweat outs, and similar defects and where bond to substrate has failed. 3.7 PROTECTION A. Remove temporary protection and enclosure of other work. Promptly remove plaster from door frames, windows, and other surfaces not indicated to be plastered. Repair floors, walls, and other surfaces stained, marred, or otherwise damaged during plastering. END OF SECTION PORTLAND CEMENT PLASTER

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