Section 09200 – Page 1 of 8 AND

SECTION 09200 - LATH AND PLASTER

PART 1 – GENERAL

1.01 RELATED DOCUMENTS A. Drawings and general provisions of Contract, including General and Supplementary Conditions and Division 0 and Division 1 Specification Sections, apply to work of this Section. 1.02 DESCRIPTION OF WORK A. Three Coat System for a plaster scratch, brown and acrylic finish coats over wood studs and accessories as shown on Drawings. 1.03 RELATED WORK A. Refer to Division 9 section for interior . B. Refer to Division 6 section for wood . C. Refer to Division 7 section for joint sealers. 1.04 QUALITY ASSURANCE A. ATM C150 – Portland Cement B. ASTM C847 – Standard Specification for Metal Lath C. ASTM C1032 – Wowen Wire Plaster Base D. ASTM C933 – Welded Wire Lath E. ASTM C144/C897 – Aggregate for Job-Mixed Portland Cement-Based Plaster F. ASTM C926 – Application of Portland Cement-Based Plaster G. ASTM C1063 – Installation of Lathing and Furring for Portland Cement Based Plaster H. PCS (Portland Cement Association) – Plaster (Stucco) Manual I. Plaster and Drywall Systems Manual, Third Edition J. ICC_ES Acceptance Criteria for Water-resistive Barriers (AC38) K. Omega Three Coat System Detail (TCS) 1.05 QUALIFICATIONS A. Manufacturer: System component materials shall be manufactured or approved by Omega Products International, Inc. and shall be distributed by the same or its authorized dealers. B. Plastering Contractor: Shall specialize in cement plasterwork with documented experience. Shall provide proof of current contractor’s license and bond where required. 1.06 SUBMITTALS A. Product Data: Submit manufacturer's product data, installation instructions, and details for cementitious materials, lath and accessories. B. Samples: Color samples of finish coat of plastering. Retain approved samples at the construction site throughout the application process.

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C. Prior to commencement of work, provide a mock-up for approval. 1. Mock-up suitable to represent the products to be installed for each color and texture constructed using the same tools and techniques to be utilized on the project. 2. Retain approved mock-up at job site throughout the application process. 3. Where acceptable to the Architect, approved mockups may become part of the completed Work if undisturbed at time of Substantial Completion. 4. One container of finish for each color and texture utilized on the project. 5. A maintenance program for finishes as required. 1.07 DELIVERY, STORAGE AND HANDLING A. Deliver materials in original, unopened packages, containers or bundles bearing brand name and identification of manufacturer. B. Store materials inside, off the ground, under cover at a temperature not less than 38° F. and in a manner to keep them dry, protected from weather, direct sunlight, surface contamination, aging, corrosion, and damage from construction traffic and other causes. Neatly stack gypsum lath flat to prevent deterioration. Damaged or deteriorated materials shall be removed. Installed elastomeric finish materials shall be protected from exposure to rain and freezing until dry. 1.08 PROJECT CONDITIONS A. Environmental Requirements, General: Comply with requirements of referenced plaster application standards and recommendations of plaster manufacturer for environmental conditions before, during and after application of plaster. B. Cold Weather Protection: For exterior synthetic wall finish or plaster, do not apply when prevailing outdoor temperature is below 40° F. If freezing is expected, do not apply synthetic wall finish or plaster beyond period of day necessary to allow hydration. C. Ventilation: Ventilation and air circulation during veneer plastering shall be kept to a minimum level until plaster has set and completely dried. Ventilate building spaces as required to remove water in excess of that required for hydration of plaster. Begin ventilation immediately after plaster is applied and continue until it dries. In enclosed areas lacking normal ventilation, provisions shall be made to mechanically remove moisture-laden air. D. Protect contiguous work from soiling, spattering, moisture deterioration and other harmful effects which might result from plastering. E. When low humidity, high temperatures and rapid drying conditions exist furring plaster base and plaster application, Durabond Joint Compound and Perf-A-Tape Reinforcement shall be used on all joints, internal corners, trim and corner beads and allowed to set and dry thoroughly before plaster application. F. Substrates: Prior to installation, inspect the wall for surface contamination or other defects that may adversely affect the performance of the materials, and shall be free of residual moisture. Do not apply Super Cement to substrates whose temperature are less than 40°F (4°C) or contain frost or ice.

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G. Inclement Weather: Protect applied material from inclement weather until dry. H. Sequencing: Coordinate the installation of the Super Cement System with all other construction trades. To reduce the likelihood of the stucco cracking, it is recommended the building carry a minimum of 90 percent of the dead building load and the interior gypsum be installed prior to installation of the stucco. I. Staffing: Provide sufficient manpower to ensure continuous operation, free of cold joints, scaffolding lines, variations in texture, etc. 1.09 WARRANTY A. Provide warranty for 5 years from date of Notice of Completion for defects or imperfections caused by workmanship which may develop within that 5 year period.

PART 2 – PRODUCTS

2.01 Manufacturers: Subject to compliance with requirements, provide products of by the following manufacturer. The Architect as delineated in Division O Bid and Agreement Documents shall review other manufacturers. A. Manufacturers of Portland Cement : 1. Omega Products International, “Enhanced Three Coat System” 2. La Habra Stucco Co. B. Manufacturers of Expanded Metal Lath: 1. Bostwick Steel Framing Co. 2. Gold Bond Building Products Div., National Gypsum Co. 3. Milcor Division; Inryco, Inc. 4. United States Gypsum Co. 5. Western Metal Lath Co. C. Manufacturers of Accessories: 1. Amico - West 2. Flannery, Inc 3. Fry Reglet Corp. 4. Gold Bond Building Products Div., National Gypsum Co. 5. Milcor Division; Inryco, Inc. 6. United States Gypsum Co. 7. Western Metal Lath Co. 8. Superior Company 2.02 SCRATCH AND BROWN COAT A. Super Cement, Non-fibered: A mixture of portland cement complying with ASTM C150 that has an additional mixture of proprietary ingredients manufactured by Omega Products International, Inc.

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B. Sand:  Sand must be clean and free from deleterious amounts of loam, clay, silt, soluble salts and organic matter.  Sampling and testing must comply with ASTM C144 or C897. C. Water: Clean and potable without foreign matter. 2.03 WATER-RESISTIVE BARRIER A. Over Open Framing : 1. Two layers of D kraft building paper, or 2. One layer of asphalt-saturated felt complying with ASTM D226 Type 2.04 LATH A. Expanded Lath: Nominal (2.5 lb/yd2, [3.4 lb/yd2 weight), galvanized steel complying with ASTM C847.] B. Rib Lath: Nominal (3.4 lb/yd2 weight), galvanized steel complying with ASTM C847 at Soffits. 2.05 SHEATHING A. Densglas “Gold, 5/8” thick panel, complying with ASTM C208 as a regular density sheathing. 2.06 ACCESSORIES A. Caulking: Acrylic latex complying with ASTM C834 or silyl-terminated polyether elastomeric sealant complying with ASTM C920. B. Vapor Retarder: A vapor retarder complying with the International Energy Conservation Code (IECC) Section 402.5 or 502.5 or IRC Section R318.1 must be provided. C. Flashing: Flashing complying with UBC Section 1404.2, IBC Section 1405.3 or IRC Section R703.8, as applicable, must be provided. D. Fasteners: Nails, staples, or screws used to rigidly secure lath and associated accessories shall be corrosion-resistant and meet the minimum requirements of ASTM C1063. E. Zinc and Zinc-Coated (Galvanized) Accessories: The following accessories shall be fabricated from zinc-coated (galvanized) steel. 1. Corner Aid: Minimum 26-gauge thick; expanded flanges shaped to permit complete embedding in plaster; minimum 2 in. wide; Square-edge style; use unless otherwise indicated. 2. Strip Mesh: Metal Lath, 3.4 lb/yd2 expanded metal; 6 in. wide x 18 in. long. 3. Vent Screed: Minimum 24-gauge thick; thickness governed by plaster thickness; minimum 4-inch (102 mm) width, double “V” profile, with perforated expanse between “V’s” of longest possible lengths. 4. Casing Bead: Minimum 24-gauge thick; thickness governed by plaster thickness; maximum possible lengths; expanded metal flanges, with square edges.

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5. Drip Screed: Minimum 26-gauge thick, depth governed by plaster thickness, minimum 3-1/2 in. high flange, maximum possible lengths. 6. Control and Expansion Joints: Depth to conform to plaster thickness; use maximum practical lengths. a. Control Joints: One-piece-type, folded pair of unperforated screeds in double V configuration; removable protective tape on plaster face of control joint. b. Expansion Joints: Two-piece-type formed to produce a slip-joint. F. Plastic Trim: Fabricated from high-impact PVC. 1. Cornerbeads: With perforated flanges. Square-edge style; use unless otherwise indicated. 2. Casing Beads: With perforated flanges in depth required to suit plaster bases indicated and flange length required to suit applications indicated. Square-edge style; use unless otherwise indicated. 3. Control Joints: One-piece-type, folded pair of unperforated screeds in double V configuration; removable protective tape on plaster face of control joint. 4. Expansion Joints: Two-piece-type formed to produce a slip-joint. 2.07 FOAM ARCHITECTURAL DETAILS A. Foam: EPS foam, 1.0 lb/ft2 minimum density. 2.08 FINSIHES A. OmegaFlex: 100% acrylic-based finish manufactured by Omega Products International, Inc. B. Color and Texture: Color and finish texture as noted (Medium Finish - Sand). 1. Refer to Sheet A7.01- Exterior Finish Legend. 2.09 MIXES ! Super Cement: Mix and proportion cement plaster in accordance with ASTM C926, PCA Plaster (Stucco) Manual, and Super Cement product data sheet. B. Finishes: Mixing and tinting instructions are contained in the appropriate product data sheets by Omega Products International, Inc.

PART 3 - EXECUTION

3.01 PREPARATION A. Furnish concrete inserts and similar devices to other trades for installation well in advance of time needed for coordination with other work. B. Plastering: Clean plaster bases and substrates to be plastered, removing loose materials, coatings and other substances which might impair the work.

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3.02 EXAMINATION A. Prior to the application of the Super Cement System the plastering contractor shall ensure that: 1. Surface and site conditions are ready to receive work. 2. Grounds and Blocking: Verify that the items within the walls for other sections of work have been installed. B. Substrates: 1. Acceptable substrates must be securely fastened per applicable building code requirements. 2. Acceptable substrates and adjacent materials must be dry, clean, and sound. Substrate surface must be flat, free of fins or planar irregularities greater than ¼- nch in 10-feet (6mm in 3m). C. Flashings: All flashing around windows, at deck attachments, utility penetrations, roof lines, etc. and all kick-out flashing must be properly installed prior to application of Omega Super Cement System. D. Unsatisfactory conditions shall be reported to the general contractor and/or builder and/or architect and/or owner. Do not proceed until all unsatisfactory conditions have been corrected. Beginning of installation means acceptance of existing conditions. 3.03 PREPERATION A. Substrate: Clean the substrate to which the Super Cement System is to be applied, ensuring that there are no foreign materials present; including, but are not limited to, oil, dirt, dust form release agents, efflorescence, paint, wax, water repellants, moisture, frost, and or extended nails that may rupture the water-resistive barrier. B. Surrounding Areas: Protect surfaces near the work of this section from damage, disfiguration, and overspray. Mask off all dissimilar materials. 3.04 INSTALLATION, GENERAL A. General Installation: Refer to ASTM C926, ASTM C1063, and the appropriate manufacturer’s product data sheet for additional installation requirements and recommendations. 3.05 INSTALLING WEATHER PROTECTION A. Water-Resistive Barrier: Apply water-resistive barrier complying with Section 1404.2 of the IBC, Section R703.2 of the IRC or Section 1402.1 of the UBC. B. Flashing: Install flashing and trim per local ordinances. Install flashing and trims properly to insure moisture does not accumulate and can easily drain to the exterior. All openings shall be properly flashed and designed to allow water to escape to the outside of the wall. All penetrations shall be properly flashed and/or sealed using approved methods. Walls should be designed to prevent bulk water from getting behind the stucco or running down the face of the stucco. The bottom of the wall is required to have weep screed or another effective means to drain any water that may get behind the stucco.

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3.06 INSTALLING LATH A. General: Installed per ASTM C1063. 3.07 INSTALLING SUPER CEMENT A. Application Over Metal Lath: Apply per ASTM C926 and C1063. Apply Super Cement by hand-troweling or machine-spraying to a nominal thickness of 3/8-inch (9.5mm) scratch coat and to a nominal thickness of 3/8-inch (9.5 mm) brown coat. B. Moist Curing: Provide sufficient moisture by fog or moist curing to permit proper hydration of the cementitious materials. The length of time and most effective procedure for curing will depend on climatic and job conditions. 3.08 INSTALLING FOAM ARCHITECTURAL DETAILS A. Attaching Foam: Apply foam shapes after the Super Cement has set. Use foam adhesive to attach EPS foam shapes to wall. See base coat product data sheet for additional information. B. Coating Foam: Apply foam base coat and embed mesh. Overlap mesh onto the stucco a minimum of 1.5-inches (38mm). C. Lath Wrapped Foam Details: Attach foam shape to wall using mechanical attachment prior to application of base coat. Lath foam shape using approved metal lath and corner aid. 3.09 INSTALLING FINISH COAT A. General: Apply per manufacturer’s product data sheet. B. Verification: Verify the desired color and texture match the approved sample and/or mock-up prior to installation. 3.10 CUTTING AND PATCHING A. Cut, patch, point up and repair plaster as necessary to accommodate other work and to restore cracks, dents, and imperfections. B. Repair or replace work to eliminate blisters, buckles, excessive crazing and check cracking, dry outs, efflorescence, sweat outs and similar defects, and where bond to the substrate has failed. Uneven surfaces will not be acceptable. Sand smooth troweled finished lightly to remove trowel marks and arises. C. Painting and patching: Replacing or patching of plaster unnecessarily damaged by other contractors shall be done by this Contractor and shall be paid for by the contractors responsible for such damage. Point up around all trim and other set work after all other trades have finished their work and leave the job in complete and perfect condition. 3.11 CLEANING AND PROTECTION A. Remove temporary protection and enclosure of other work. B. Promptly remove plaster from door frames, windows, and other surfaces which are not to be plastered. C. Repair walks, floors, walls and other surfaces which have been stained, marred or otherwise damaged during the plastering work.

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D. When plastering work is completed, remove unused materials, containers and equipment and clean ground of plaster debris. E. Provide final protection and maintain conditions, in a manner suitable to Installer, which ensures plaster work being without damage or deterioration at time of substantial completion. F. Protect applied material from inclement weather until dry and prevent it from freezing for a minimum of 24-hours after set and/or until dry. Refer to manufacturer’s product data sheet for additional requirements.

END OF SECTION – 09200 08/05/09 rg 19jul10 rg 24may12 rsb

Shafter-Wasco Irrigation District – Office - #01-267