������������������������ SECTION 09225
������������ POLYMER/FIBER MODIFIED STUCCO SYSTEM
PART 1� GENERAL
1.1 SECTION INCLUDES
��� A.� Stucco base coat consisting of a mixture of Portland cement, sand, glass fibers, water, and proprietary ingredients.
��� B.� Lath, weather resistive barrier, and accessories for a complete installation as indicated by the Contract Documents.
1.2 RELATED SECTIONS
��� A.� Section 03300 - Cast-In-Place Concrete.
��� B.� Section 04200 - Unit Masonry.
��� C.� Section 05400 - Cold-Formed Metal Framing.
��� D.� Section 06100 - Rough Carpentry.
��� E.� Section 06115 - Sheathing.
��� F.� Section 07900 - Joint Sealers.
1.3 REFERENCES
��� A.� ASTM C 144 - Standard Specfication Aggregate for Masonry Mortars.
��� B.� ASTM C 1063 - Standard Specification for Installation of Lathing and Furring for Portland Cement-Based Plaster.
��� C.� U.B.C. Standard No. 17-1 - Kraft Waterproof Building Paper.
��� D.� U.B.C. Standard No. 32-1 - Asphalt Saturated Building Felt.
1.4 SUBMITTALS
��� A.� Submit under provisions of Section 01300.
��� B.� Product Data:� Submit manufacturer's specifications, installation instructions, and product data.
��� C.� Samples:� Submit samples to demonstrate compliance with texture and color indicated.
��� D.� Certificates:� Submit installer's certificate of training.
1.5 QUALITY ASSURANCE
��� A.� The system shall be installed by an applicator approved by C-Cure Corporation.
��� B.� Mock-ups:� Provide mock-up panel using materials specified for final work.� Construct mock-up as directed, and of full thickness.� Demonstrate the proposed range of color, texture, and workmanship to be expected in the completed work.� Obtain Architect's acceptance of visual qualities of the sample panel.
1.6 DELIVERY, STORAGE, AND HANDLING
��� A.� Deliver materials to the site in sealed containers of bags fully identified with manufacturer's name, brand, type, and grade.� Store materials in a dry, well ventilated space, under cover and off the ground.
1.7 PROJECT CONDITIONS
��� A.� Maintain ambient air temperatures from 43 deg F to 120 deg F during application and curing of base coat.� Provide temporary heat and protection, if necessary.
��� B.� Do not apply to frozen surfaces or surfaces containing frost.
PART 2� PRODUCTS
2.1 MANUFACTURERS
��� A.� Provide products manufactured by or approved by C-Cure Corporation, 16225 Park Ten Place, Suite 850, Houston, TX� 77084-5155. �Telephone 713-492-5100.� FAX 713-492-5120.
������� 1.� Substitutions will not be acceptable.
2.2 MATERIALS
��� A.� Stucco Base Coat:�
������� 1.� "PermaCoat 920 Base Coat Concentrate (Fibered)".
������� 2.� "Unicoat 720 Base Coat Concentrate (Fibered)".
��� B.� Base Coat Admix:� "PermaCoat 920 Admixture"; not less than 40% acrylic polymer solids.
��� C.� Water:� Clean, fresh, suitable for domestic consumption and free from such amounts of mineral and organic substances as would affect the stucco.
��� D.� Sand:� Clean and free from deleterious amounts of silt, loam, soluble salts, clay, and organic matter;� complying with ASTM C 144.
��� E.� Lath:� Minimum 20 gauge, 1 inch galvanized steel wire fabric or 1.75 pound per square yard expanded metal lath fabricated from painted, copper bearing steel or zinc alloy (ASTM C 1063).
������� 1.� Provide self furring lath over all substrates except unbacked polystyrene insulation board.� Self furring lath shall have sufficient clearance between the wire and substrate to allow embedment in the base coat.
��� F.� Weather Resistive Barrier:
������� 1.� Minimum grade D Kraft Building Paper complying with U.B.C. Standard No. 17-1.
������� 2.� Asphalt saturated rag felt complying with U.B.C. Standard No. 32-1.
��� G.� Accessories:� Coordinate depth of accessories with thickness and number of coats required.� Fabricate from galvanized metal, zinc alloy, or plastic (ASTM C 1063).
������� 1.� Corner Reinforcement:� Pre-formed corners with expanded flanges having either small nose or radius corners, or expanded metal lath reinforcement extending minimum of 3" in either direction for large radius corners.
������� 2.� Casing Beads:� Pre-formed "J" trim for stucco terminations.
����������� a.� Perforated for weep when installed at panel base edge.
������� 3.� Control Joints:� One piece "M" type trim with expanded flanges.
������� 4.� Expansion Joints:� Two piece, adjustable width slip joint, or pair of casing beads installed back to back to allow for movement between dissimilar substrates.
��� H.� Insulation Board:� Expanded or extruded polystyrene insulation board.
������� 1.� Density:� 1.5 pounds per cubic foot, minimum.
������� 2.� Flame spread:� Class 1.
������� 3.� Smoke developed:� 450, maximum.
������� 4.� Recognized in a current evaluation report issued by ICBO, NES or the National Evaluation Service.
������� 5.� Over open framing:� 3/8 inch high tongues with compatible grooves for horizontal joints.
2.3 MIXES
��� A.� Mix in accordance with manufacturer's recommendations.
PART 3� EXECUTION
3.1 EXAMINATION
��� A.� Examine substrates to receive the stucco. Provide written notice of conditions detrimental to the proper and timely completion of the Work.� Do not proceed until unsatisfactory conditions have been corrected in an acceptable manner.
��� B.� Concrete and Masonry:� Free from dirt from oils and curing compounds or any other materials deleterious to bonding.
3.2 WEATHER RESISTANT BARRIER
��� A.� Installation:
������� 1.� Install barrier over all substrates other than concrete or masonry.
������� 2.� Install barrier under polystyrene board.
������� 3.� Over wood based sheathing install two layers of building paper, shingle fashion.
������� 4.� Over non-wood sheathings, install one layer of rag felt or building paper, weatherboard fashion;� lap edges not less than 2 inches and ends not less than 6 inches.
3.3 INSULATION BOARD
��� A.� Beginning at bottom, place insulation board horizontally with tongue faced upward and temporarily fasten with galvanized staples, roofing nails. or screws.
��� B.� Stagger vertical butt joints at least 1 stud space from adjacent courses.
��� C.� Locate vertical butt joints directly over studs.
3.4 LATH AND ACCESSORIES
��� A.� Installation:
������� 1.� Install lath beginning at bottom of wall and apply with long dimension across supports.
������� 2.� Lap sides and ends a minimum of 1-1/2 inches.
������� 3.� Make end laps of lath only over supports and stagger end laps in adjacent courses.
������� 4.� Bend lath around all corners, both internal and external, or provide additional reinforcing lath.
��� B.� Fastening:�
������� 1.� Fasten lath through sheathing and into wood studs using No. 11 gauge galvanized roofing nails or No. 16 gauge galvanized staples spaced not more than 6 inches on center with not less than 1 inch penetration.
������� 2.� Fasten to metal studs using No. 7, Type S wafer head screws spaced not more than 6 inches on center.� Screws shall penetrate at least 1/4 inch into the stud.
��� C.� Accessories:
������� 1.� Install corner beads or corner reinforcement at all external corners.
������� 2.� Install casing beads where stucco stops and at all stucco terminations.
������� 3.� Install weep screed at base.
������� 4.� Install control joints corners of doors, windows, or any wall openings and in the stucco field to create panels no larger than 144 square feet.� Distance between control joints shall not exceed 12 feet in any direction.
������� 5.� Install expansion joints where dissimilar substrates meet and at structural expansion joints.
������� 6.� Where control joints are not indicated at corners of doors and windows and other openings, install 12" x 12" layer of reinforcing metal lath at corners.
��� D.� Miscellaneous:� For large radius parapet caps, install additional layer of reinforcing metal lath at all parapet caps extending down minimum 3 inches either side.
3.5 STUCCO APPLICATION
��� A.� Base Coat:� Apply by hand trowel or machine spray to a minimum thickness of 3/8".� Bring surface to a true and even plane using rod or darby as required for desired finish.� Float surface to remove any irregularities and leave ready to receive finish coat.
��� B.� Finish Coat:� Finish coat may be applied as soon as base coat has sufficiently set.� The thickness of the finish coat shall be sufficient to achieve the texture specified.� When applying the finish, plan work so that the entire wall can be completed at one time so as to eliminate joining lines.� If not practical, use a corner, door or window as a breaking point.
��� C.� Texture of finish coat shall be ____________ or as noted on drawings.
3.6 ADJUSTING, CLEANING, AND PROTECTION
��� A.� Upon completion, point-up stucco around trim and other locations where stucco meets dissimilar materials.
��� B.� Cut out and patch damaged stucco.
��� C.� Match patch of damaged stucco to existing work in form, texture and color.
��� D.� Do not allow debris to accumulate on site.
��� E.� Protect adjacent work from spills and stains.� Immediately remove and clean base or finish coat materials from surfaces not scheduled to receive stucco.
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