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	SECTION 09220
	PORTLAND CEMENT PLASTER
	** NOTE TO SPECIFIER ** Spec Mix, Inc.; cementitious products. . This section is based on the products of Spec Mix, Inc., which is located at:
	2025 Centre Pointe Blvd. Suite 260 Mendota Heights, MN 55120 Toll Free Tel: (888) SPEC-MIX (773-2649) Tel: (651) 688-8966 Fax: (888)329-7732 Email: Web: www.specmix.com [ Click Here ] for additional information.
	SPEC MIX is your national source for high quality factory produced cementitious products for the construction industry. With 57 licensed manufacturers located in major markets across the U.S., and Canada, the SPEC MIX team utilizes computerized batching equipment and the finest materials to ensure total quality control throughout your project. We also offer various patented silo systems to maximize a contractor's proficiency and safety rating. Our purpose is to keep your crew going, moving and working. Through our highly trained market representatives located in every territory, SPEC MIX provides you with expert technical support throughout the U.S., and Canada. Enjoy browsing the SPEC MIX web site and please call us at 888-SPECMIX for any additional information.
	PART 1	GENERAL
	1.1	SECTION INCLUDES
		A.	High-performance pre-mixed basecoat for plaster and stucco finishes.
	1.2	RELATED SECTIONS
	** NOTE TO SPECIFIER ** Delete any sections below not relevant to this project; add others as required.
		A.	Section 03300 - Concrete.
		B.	Section 04200 - Masonry.
		C.	Section 04500 - Plywood.
		D.	Section 05400 - Cold-Formed Metal Framing: Light gauge load-bearing metal framing.
		E.	Section 06100 - Rough Carpentry: Wood framing.
		F.	Section 07260 - Vapor Retarders: Building paper.
		G.	Section 07920 - Joint Sealants.
		H.	Section 08100 - Metal Doors and Frames.
		I.	Section 08200 - Wood and Plastic Doors.
		J.	Section 09100 - Metal Support Assemblies.
		K.	Section 09111 - Non-load Bearing Steel Framing: Non-load-bearing metal framing systems.
		L.	Section 09205 - Furring and Lathing.
		M.	Section 09250 - Gypsum Board: Exterior gypsum substrates.
	1.3	REFERENCES
		A.	ASTM C150: Standard Specification for Portland Cement.
		B.	ASTM C847: Standard Specification for Metal Lath.
		C.	ASTM C926: Standard Specification for Application of Portland Cement-Based Plaster.
		D.	ASTM C933: Standard Specification for Welded Wire Lath.
		E.	ASTM C1032: Standard Specification for Woven Wire Plaster Base.
		F.	ASTM C1063: Standard Specification for Installation of Lathing and Furring to Receive Interior and Exterior Portland Cement-Based Plaster.
		G.	ICC-ES AC11: Cementitious Exterior Wall Coatings.
		H.	ESR-1471: ICC Evaluation Service, Inc., ESR-1471.
	1.4	SUBMITTALS
		A.	Submit under provisions of Section 01300.
		B.	Product Data: Manufacturer's data sheets on each product to be used, including:
			1.	Preparation instructions and recommendations.
			2.	Storage and handling requirements and recommendations.
			3.	Installation methods.
	** NOTE TO SPECIFIER ** Delete selection samples if colors have already been selected.
		C.	Selection Samples: For each finish product specified, two complete sets of color chips representing manufacturer's full range of available colors and patterns.
		D.	Verification Samples: For each finish product specified, two samples, minimum size 6 inches (150 mm) square, representing actual product, color, and patterns.
	1.5	QUALITY ASSURANCE
		A.	Manufacturer Qualifications: Experienced in the manufacturing of pre-sanded materials.
		B.	Installer Qualifications: Shall provide evidence of qualifications to apply the basecoat.
	** NOTE TO SPECIFIER ** Include a mock-up if the project size and/or quality warrant taking such a precaution. The following is one example of how a mock-up on a large project might be specified. When deciding on the extent of the mock-up, consider all the major different types of work on the project.
		C.	Mock-Up: Provide a mock-up for evaluation of surface preparation techniques and application workmanship.
			1.	Finish areas designated by Architect.
			2.	Construct mock-up as per construction documents.
			3.	Show workmanship of finished work.
			4.	Proceed with work only after the mock-up has been approved.
			5.	Refinish mock-up area as required to produce acceptable work.
			6.	Maintain the mock-up on site and remove at the completion of the project.
		D.	Regulatory requirements: Conform to applicable code requirements for finish system.
		E.	Designing and Detailing the Basecoat.
			1.	Use the manufacturer's installation instructions, published details, and technical information verifying that all materials meet specification.
			2.	Sealants and backer rod are required at dissimilar materials and expansion joints within the basecoat system to provide a watertight system.
			3.	Minimum slope for all projections shall be 1;2 with a maximum length of 12 inches (305 mm) unless other manufacturer approved detailing is shown on the construction documents.
		F.	Substrate Systems:
	** NOTE TO SPECIFIER ** Others shall engineer the substrate systems with regard to structural performance. Delete if not required.
			1.	Deflection of the substrate systems shall not exceed L/360.
			2.	Acceptable substrates are water-resistant core exterior grade gypsum sheathing (ASTM C1396), Dens-Glass Gold sheathing (ASTM C1177), fiberboard ANSI/AHA A 194-85, exposure 1 (Grade C-D or better) plywood, expanded polystyrene insulation board ASTM C578, exposure 1 oriented strand board, cement board (ASTM C1325), poured concrete, and masonry units.
				a.	Painted and otherwise coated surfaces of brick, unit masonry, stucco and concrete shall be inspected and prepared as approved by manufacturer's technical department before application. Paint-on surface consolidates or primers shall not be used to bond base coat to painted surfaces.
				b.	Provide approval from manufacturer's technical department, in writing, prior to the application, of other substrates.
				c.	The applicator shall verify that the proposed substrate is acceptable prior to the base coat installation.
		G.	System Joints:
			1.	Expansion joints in the system are required at building expansion joints, at prefabricated panel joints, where substrates change and where structural movement is anticipated. Control joints are required at a minimum of every 13 sq. meters (144 sf) of wall surface area and where specified by the design professional. The maximum uncontrolled length or width is 18 lf (5.5 lineal meters) and a maximum uncontrolled length to width ratio of 2-1/2 to 1.
	1.6	DELIVERY, STORAGE AND HANDLING
		A.	Deliver, store and handle products in accordance with manufacturer's recommendations.
		B.	Deliver materials in original unopened packages with manufacturer's labels intact.
		C.	Protect materials during transportation and installation to avoid physical damage.
		D.	Store materials in cool, dry place protected from freezing.
		E.	Handle materials and products with appropriate precautions and care per MSDS information
	1.7	PROJECT/SITE CONDITIONS
		A.	Do not apply materials in ambient temperatures below 40 degree F (4 degree C). Provide supplementary heat during installation and drying period when temperatures less than 40 degree F (4 degree C) prevail.
		B.	Do not apply materials to frozen surfaces.
		C.	Maintain ambient temperature at or above 40 degree F (4 degree C) during and at least 24 hours after base coat installation and until dry.
	1.8	SEQUENCING AND SCHEDULING
		A.	Coordinate and schedule installation of the base coat with related work of other sections.
		B.	Coordinate and schedule installation of trim, flashing, and joint sealers to prevent water infiltration behind the system.
	1.9	WARRANTY
		A.	Provide a manufacturer's warranty based on the information provided by the applicator or the distributor following the completion of the system.
		B.	Comply with manufacturer's project review requirements and notification procedures to assure qualification for warranty.
	PART 2	PRODUCTS
	2.1	MANUFACTURERS
		A.	Acceptable Manufacturer: SPEC MIX®, Inc., which is located at: 2025 Centre Pointe Blvd. Suite 260 ; Mendota Heights, MN 55120; Toll Free Tel: 888-SPEC-MIX (773-2649) ; Tel: 651-688-8966 ; Fax: 888-329-7732; Email: request info; Web: www.specmix.com
	** NOTE TO SPECIFIER ** Delete one of the following two paragraphs; coordinate with requirements of Division 1 section on product options and substitutions.
		B.	Substitutions: Not permitted.
		C.	Requests for substitutions will be considered in accordance with provisions of Section 01600.
	2.2	MATERIALS
		A.	Fiber Base Coat: Fiber base coat shall be a Portland cement based, fiber reinforced, base coat with properly gradated sand and other proprietary ingredients.
			1.	Product: SPEC MIX FIBER BASE COAT as manufactured by Spec Mix, 1nc.
	** NOTE TO SPECIFIER ** Delete if not required.
		B.	Insulation Board for The Insulation of the Hard Coat Stucco System: Provide expanded or extruded polystyrene not to exceed 1.5 lb density tongue and groove. Thickness of EPS shall not exceed 1-1/2 inches (38 mm). Nominal 1.5 pcf aged expanded polystyrene. Flame spread and smoke development shall be 25 and 450 or less per ASTM E 84. Maximum size 2 feet by 8 feet by 1.5 inches (610 mm by 2438 mm by 38 mm), tongue and groove with 3/8 inch (9.5 mm) high tongue and groove.
	** NOTE TO SPECIFIER ** The lath is self furred or furred when applied over all substrates except unbacked polystyrene. Delete if not required.
		C.	Metal Lath or Woven/Welded Wire: Minimum No. 20 gauge, 1 inch (25.4 mm) galvanized steel, woven wire fabric. Laths shall comply with ASTM C933-80 (welded) and ASTM C1032-86 (woven).
	** NOTE TO SPECIFIER ** Delete if not required.
		D.	Expanded Metal Lath: The lath shall comply with ASTM C847-93. Furring and self-furring requirements shall be as set forth for wire fabric lath. Minimum weight is 2.5 lb/yd2 (1.36 kg/m2). Other acceptable welded laths shall comply with ASTM C933-80 and other acceptable woven laths shall comply with ASTM C1032-86.
	** NOTE TO SPECIFIER ** The lath is self-furred or furred when applied over all substrates except unbacked polystyrene. Delete if not required.
		E.	Metal Lath or Woven/Welded Wire: Minimum No. 17 gauge, 1 inch (25.4 mm) galvanized steel, woven wire fabric is required. Other laths shall comply with ASTM C933-80 (welded) and ASTM C1032-86 (woven).
	** NOTE TO SPECIFIER ** Delete if not required.
		F.	Expanded Metal Lath: The lath shall comply with ASTM C847-93. Furring and self-furring requirements shall be as set forth for wire-fabric lath. Minimum weight is 3.4 lb/yd2 (0.665 kg/m2). Other acceptable welded laths shall comply with ASTM C933-80 and other acceptable woven laths shall comply with ASTM C1032-86.
		G.	Plaster sand (pre-blended) shall comply with ASTM C144 or ASTM C897.
		H.	Water: Clean and potable without foreign matter.
	2.3	ACCESSORIES
		A.	Trim: Casing bead, corner bead, expansion joint and weep screed accessories shall meet the requirements of ASTM C1063.
	** NOTE TO SPECIFIER ** Zinc accessories are recommended where highly humid or salt-laden service conditions exist. Delete material not required.
			1.	Accessories shall be vinyl, meeting ASTM D1784.
			2.	Accessories shall be galvanized, meeting ASTM A525 and ASTM A526.
			3.	Accessories shall be zinc, meeting ASTM B69.
			4.	Foundation Weep Screed: Beveled edge designed to terminate finish system and drain internal moisture.
			5.	Casing Bead: Square edge style.
			6.	Corner Bead: Small radius nose style.
			7.	Control Joints: W-shaped accordion profile style.
			8.	Expansion Joints: Two piece type slip-joint design or pair of casing beads spaced for application of backer rod sealant bead.
		B.	Fasteners: Comply with ASTM C1063 for type and size of fastener required to rigidly secure materials in place.
		C.	A secondary weather barrier shall be installed over sheathing substrates and wrapped into rough openings prior to installation of the base coat. Acceptable secondary weather barriers:
	** NOTE TO SPECIFIER ** Delete secondary weather barrier not required.
			1.	Minimum grade D building paper complying with federal specifications UUB 790a or asphalt-saturated rag felt complying with UL standard number 55-A or other code-recognized equivalent.
			2.	One layer of Grade D 60 minute paper with one layer of EPS or extruded polystyrene with tongue and groove edges
			3.	Two layers Grade D 60 minute paper are required by Uniform Building Code (UBC) for wood-based sheathings. Check the applicable code and code compliance report for appropriate type.
		D.	Flashing and Detail Tape: 20 mil (0.5 mm) thick, self-sealing, self-healing rubberized asphalt laminated to a polyethylene film.
	PART 3	EXECUTION
	3.1	EXAMINATION
		A.	Verify project site conditions under provisions of Section 01039.
		B.	Walls:
			1.	Substrates:
				a.	Acceptable Substrates: exposure 1 or exterior grade plywood sheathing (Grade C-D or better); exposure 1 OSB; cement boards conforming with (ASTM C1325); poured concrete/unit masonry; Dens-Glass Gold sheathing (ASTM C1177); or gypsum sheathing (ASTM C1396).
				b.	Wall sheathings shall be securely fastened per applicable building code requirements.
				c.	Examine surfaces to receive system and verify that substrate and adjacent materials are dry, clean, and sound. Verify substrate surface is flat, free of fins or planar irregularities greater than 1/4 inch in 10 feet (6 mm in 3m).
			2.	Flashings:
				a.	Heads, jambs and sills of all openings must be flashed with a minimum 9 inches (230 mm) strip of secondary moisture barrier prior to window/door, HVAC, installation.
				b.	Windows and openings shall be flashed according to design and building code requirements.
				c.	Individual windows that are ganged to make multiple units require continuous head flashing and/or the joints between the units must be fully sealed.
			3.	Utilities:
				a.	The system shall be properly terminated (back-wrapped, sealed, flashed) at all lighting fixtures, electrical outlets, hose bibs, dryer vents, etc.
		C.	Decks: Wood decks must be properly flashed prior to system application. The system shall be terminated a minimum of 1 inch (25 mm) above all decks, patios, sidewalks, etc.
		D.	Secondary Moisture Barrier: Verify that the secondary moisture barrier is installed over the substrate per applicable building code requirements, manufacturer's specifications prior to application of the base coat.
		E.	Roof:
			1.	Verify that all roof flashings have been installed in accordance with the guidelines set by the Asphalt Roofing Manufacturers Association (ARMA).
			2.	Kick-out Flashing:
				a.	Kick-out flashing shall be installed where required prior to the application of the base coat. The kick-out flashing shall be leak-proof and angled (min 100 degrees) to allow for proper drainage and water diversion.
		F.	Unsatisfactory conditions shall be reported to the architect and/or owner. Do not proceed until all unsatisfactory conditions have been corrected.
	3.2	MIXING
		A.	General: No additives are permitted unless specified in product mixing instructions. Close containers when not in use. Prepare in a container that is clean and free of foreign substances. Do not use a container which has contained or been cleaned with a petroleum-based product. Use a mixer which is clean and free of foreign substances. Clean tools with soap and water immediately after use.
		B.	Base Coat:
			1.	Place 2/3 of the required potable water into the mixer. Typically one bag requires 1.5 to 2 gallons (5.5 l to 7.5 l) of water.
			2.	Add the bag(s) of base coat
			3.	Mix for 4 to 5 minutes and then let the mixture slake for 3 to 4 minutes.
			4.	Re-mix to break the initial set add small amounts of water to adjust the consistency.
	3.3	APPLICATION
		A.	General: Apply materials in accordance with manufacturer's. specifications.
		B.	Apply to approved substrates in accordance with manufacturer's instruction and government code requirements.
		C.	Lath:
			1.	Wire Fabric Lath:
				a.	Wire or lath shall be applied with minimum 1-1/2 inches (13mm) end and side laps.
				b.	Furring crimps shall occur at maximum 6 inches (152 mm) intervals each way. Furring crimps shall provide a minimum 1/8 inch (3.2 mm) clearance from the substrate after installation.
	** NOTE TO SPECIFIER ** Delete installation not required.
			2.	Metal Lath:
				a.	The metal lath shall be applied with minimum 1-1/2 inches (13mm) side and end laps.
				b.	When end laps occur between supports, lace or wire ties the ends of the sheets with 0.0475 inch (1.2 mm) galvanized annealed steel wire. Refer to ASTM C1063 for additional information.
				c.	Corrosion-resistant fasteners for lath attachment shall penetrate a minimum of 1 inch (25 mm) into wood framing.
				d.	Apply the base coat over steel framing minimum No. 20 gauge, 0.0359 inch (0.912 mm) thick. Lath is secured to framing using No.8-18, S-12, pan head, self-tapping screws spaced a maximum of 6 inches (152.4 mm) vertical on center to studs.
		D.	Trim Junction:
			1.	When two pieces of trim abut:
				a.	Set intersection of trim in a minimum 4 inches (100 mm) bed of trim sealant approved by the manufacturer.
				b.	Allow 1/8 inch to 3/16 inch (3 to 5 mm) gap between the abutting trim pieces. Do not overlap trim.
				c.	Attach the trim in accordance with manufacturer's specifications. Working expansion joints shall be fastened to the structural substrate.
			2.	When two or more pieces of trim intersect:
				a.	The vertical trim piece shall be continuous with all horizontal pieces.
				b.	Miter all corners at intersections of trim.
				c.	Set intersection of trim in a minimum 4 inches (100 mm) bed of trim sealant approved by the manufacturer.
				d.	Allow 3/16 inch (5 mm) gap between the intersecting trim pieces. Do not overlap the trim.
				e.	Attach the trim in accordance with manufacturer's specifications. Working expansion joints shall be fastened to the structural substrate.
	** NOTE TO SPECIFIER ** Control joints are required at a minimum of every 144 sf (13.4 m2) and as indicated. The maximum uncontrolled length or width is 18 lf (5.5 lineal meters) and a maximum uncontrolled length to width ratio of 2-1/2 to 1.
		E.	Application Over Open Framing:
			1.	The weather-resistive membrane is placed over open wood or steel framing spaced a maximum of 24 inches (610 mm) on center. Wall bracing, in accordance with the applicable code, shall be installed. Square wall corners and parapet corners, metal corner reinforcement is optional. The expanded polystyrene insulation board shall be placed horizontally with the tongue facing upward and temporarily held in place with galvanized staples or roofing nails. Self- tapping screws shall be used to temporarily fasten the board to metal framing. Vertical butt joints shall be staggered a minimum of one framing space from the adjacent courses and occur directly over framing.
	** NOTE TO SPECIFIER ** Delete installation and fastener not required.
			2.	The lath shall be applied tightly over the insulation board and shall be fastened through the board to wood framing with minimum 2 inches (50 mm) long, No. 11 gauge (3.75 mm) shaft diameter, 0.438 inch (11.1 mm) head diameter, galvanized roofing nails or No. 16 gauge (1.59 mm) shaft diameter galvanized staples spaced a maximum of 6 inches (152 mm) on center with a minimum 1 inch (25.4 mm) penetration into the wood framing. Staples shall have a minimum 1/2 inch (13 mm) crown width. Stapling shall be utilized only in wood species having a minimum specific gravity of 0.42.
	** NOTE TO SPECIFIER ** Delete installation and fastener not required.
			3.	The lath shall be fastened to all steel framing members, minimum No. 20 gauge, (0.912 mm) thick using No. 8-18, S-12, pan head, self-tapping screws spaced a maximum of 6 inches (152 mm) on center to all framing. The screws shall penetrate framing at least 1/4 inch (6 mm). The wire lath shall be applied with minimum 1 inch (25.4 mm) end laps.
		F.	Base Coat Application:
			1.	Total thickness of base coats shall meet code requirements for fire rated construction.
			2.	Nominal plaster base coat thickness 3/8 inch to 1/2 inch (9.5 to 12 mm) for "one coat" application.
			3.	Nominal plaster base coat total thickness 3/4 inch to 7/8 inch (19 mm to 22 mm) for scratch and brown application
				a.	First coat "scratch": 3/8 inch to 1/2 inch (9.5 to 12 mm).
				b.	Second coat "brown": 3/8 inch to 1/2 inch (9.5 to 12 mm).
			4.	Apply cement plaster with sufficient force to develop full adhesion between plaster and the substrate.
			5.	Apply the base coat to completely embed lath or wire and to completely fill the thick ness of the casing, screeds, or expansion/control joint.
			6.	It is acceptable to use the double back method of application, whereby the first pass of base coat `covers the lath or wire and the second pass of base coat fills in the casing, screed, or control/expansion joints.
			7.	Once the base coat has been applied to the required thickness, a rod should be used to level the base coat with screeds, to provide a true, flat plane. Follow this by wood floating or darbying the surface. Fill all voids and dress surface for the finish coat.
			8.	Damp cure for at least 48 hours by lightly and evenly fogging the surface with water at least twice a day. Direct sunlight, hot temperatures, low humidity and wind shall require additional fogging as necessary.
			9.	Allow base coat to cure a minimum of 6 days prior to application of EPS insulation board shapes or primer and finish.
	3.4	CLEANING
		A.	Clean material from adjacent surfaces as recommended by manufacturer.
		B.	Remove surplus material and debris, including field sample, from site.
	3.5	PROTECTION
		A.	Protect base coat from rain, snow and frost for 48 to 72 hours following application.
		B.	Protect all dissimilar materials from the finished base coat.
	END OF SECTION