UNI-TEX. A. Section Includes: Materials and Installation of the Air/Moisture Barrier and EIFS System

Transcription

1 UNI-TEX Construction Products Division GUARDIAN AIR AND MOISTURE BARRIER SYSTEM MASTER GUIDE SPECIFICATION SECTION 7240 PART I GENERAL 1.01 SUMMARY This specification is intended for use in assuring proper design, use and installation of the UNI-TEX Exterior Insulation and Finish System (EIFS) and air/moisture barrier over exterior wall sheathing. The UNI-TEX GUARDIAN System consists of EPS insulation board, adhesive, reinforcing fabric, base coat and finish texture. This system functions as a decorative and protective insulating wall cladding. UNI-TEX GUARDIAN is an air and moisture barrier consisting of two components joint seal and waterproof coating. The secondary moisture protection provided by UNI-TEX GUARDIAN protects wall sheathing against moisture damage during the construction process, and in the event of a breach in the EIFS wall cladding while in service. It is not intended to correct faulty construction, as in the absence or improper integration of flashings, nor is it intended to correct other defective components such as windows that leak into the wall assembly. Flashing should always be installed to direct water to the exterior. As an air barrier system, UNI-TEX GUARDIAN minimizes the risk of condensation occurring within the building envelope by eliminating mass transfer of warm, moisture laden interior air to the exterior. Typically, an air barrier is advantageous in cold climates to prevent the passage of moisture through the wall assembly where it can condense. A complete air barrier consists of individual components working in unison to form a continuous, effective system. The construction professional most take into account material compatibility and construction sequencing when designing an airtight assembly. The effects of air tightness on mechanical ventilation should also be included in the overall project evaluation. An air barrier is not a vapor barrier, which may also be used in the wall assembly. A vapor barrier is generally installed on the interior (warm) side of the wall in cold climates. A vapor barrier should not be installed on the inside of walls in warm, humid climates. A. Section Includes: Materials and Installation of the Air/Moisture Barrier and EIFS System B. Related Sections: 1. Unit Masonry Section Concrete Sections and Light Gauge Cold Formed Steel Framing Section Wood Framing Section Sealants Section DESIGN REQUIREMENTS A. Wind Load: 1. Design for maximum allowable system deflection, normal to the plane of the wall, L/ Design for wind load in conformance with building code requirements. UNITED COATINGS 7 TEXTURED WALL WATERPROOFING January, 2002 EIFS (Class PB) with Moisture Protection

2 B. Moisture Control: 1. Water Leakage Prevention: Prevent the accumulation of water behind the EIFS System, as a result of either condensation or leakage through the wall construction, in the design and detailing of the wall assembly. Provide flashing to direct the water to the exterior, including above windows and door heads, beneath window and door sills, at roof/wall intersections, decks, abutments with lower walls or higher walls, above projecting features and at the base of the wall. 2. Air Leakage Prevention: Provide continuity of the air barrier system at the foundation, roof, windows, doors and other penetrations through the system with connecting and compatible air barrier components, in order to minimize condensation and leakage caused by air movement. 3. Vapor Diffusion and Condensation: Perform a dew point analysis of the wall assembly to determine the potential for accumulation of moisture in the wall assembly as a result of water vapor diffusion and condensation. Adjust the insulation thickness or other wall assembly components accordingly in order to minimize the risk of condensation occurring within the wall assembly. Avoid the use of vapor barriers on the interior side of the wall in warm, humid climates. C. Impact Resistance: Provide high impact protection to a minimum height of 6' (2 m) above the finish grade at all areas subject to foot traffic, and at any other areas that are exposed to high stress or potential impact. D. Color Selection: Select a color, or colors, from UNITED COATINGS' UNI-TEX color chart or architectural fan deck. (Note: The use of dark colors is not recommended with EIF Systems that utilize EPS foam as a component. EPS board has an upper temperature limitation of 160 F (71 C)). E. Joints: 1. A minimum joint width of ¾" (1.9 cm) in the EIFS is required where the system abuts dissimilar substrates or materials, at changes in building heights, and at floor lines in multi-level wood frame construction. 2. Install a minimum ½" (1.3 cm) wide sealant joint at all penetrations through the EIFS, such as at windows, doors, etc. 3. Specify compatible sealants and backer rod that are in compliance with ASTM C Design joints so that the air barrier continuity is maintained across the joint, and install all joints so that they drain to the exterior. F. Grade: Do not specify EIFS to be installed below the finished grade. Refer to UNI-TEX GUARDIAN detail drawings for proper termination of the system. G. Trim, Architectural Features and Reveals: All trim and projecting features must have a 1:2 slope along their top surface to allow for proper water drainage. Increase slope for projects in northern climates to prevent the accumulation of ice, snow and water on the surface. Where the trim feature or bottom surface of a reveal projects more than 2" (5 cm) from the face of the EIFS wall plane, protect the top surface with GUARDIAN Air/Moisture Barrier, applied over the base coat application. H. Fire Protection: 1. Do not use foam plastics in excess of 4" (10 cm) thick unless approved by local codes or fire officials. 2. Where a fire resistance rating is required by code, use EIFS over a rated assembly. 3. Refer to Manufacturer's applicable code compliance report for other limitations that may apply SYSTEM DESCRIPTION A. Manufacturer Requirements: 1. The EIF System shall have been manufactured and marketed for a minimum of ten (10) years. 2. The EIF System shall comply with current building code requirements. B. Performance Requirements 1. The UNI-TEX GUARDIAN System shall have been tested for durability as follows: a. Abrasion Resistance: ASTM D 968 (Federal Test Standard 141A, Method 6191) b. Water Absorption/Freeze-Thaw: 60 cycles of the following: Soak in water at 20 C (68 F) for four days, then expose to 10 C (14 F) for two hours, followed by 20 C (68 F) for two hours. Results shall show no checking, cracking or splitting. c. Accelerated Weathering: ASTM G 23 (Federal Test Standard 141A, Method 6151)

3 d. Mildew Resistance: MIL Standard 810B e. Moisture Resistance: ASTM D 2247 (Federal Test Standard 141A, Method 6201) f. Salt Spray Resistance: ASTM B 117 (Federal Test Standard 141A, Method 6061) g. Water Penetration: ASTM E 331 h. Water Vapor Transmission: ASTM E 96 Water Method, Procedure B; Standard lamina 10 g/hr m² (14 gr/hr ft²). 2. The UNI-TEX GUARDIAN System shall have been tested for structural performance as follows: a. Bond Strength: ASTM C 297 b. Full Scale Structural Tests: ASTM E 330 c. Impact Resistance: In accordance with EIMA Standard Refer to Table #1 on the next page. 3. The UNI-TEX GUARDIAN System shall have been tested for fire performance as follows: a. Flame Spread ASTM E 84. When tested individually: 1) The EPS insulation board shall have a Flame Spread index not exceeding 25 and a Smoke Developed index not exceeding ) The adhesives and coatings shall have a Flame Spread index not exceeding 20 and a Smoke Developed index not exceeding 10. b. ASTM E 108 (Modified) c. ASTM E 119 One-Hour Assembly d. ASTM E 119 Two-Hour Assembly e. UBC 26-4 (Formerly UBC 17-6) Table #1 EIMA Classification Impact Range Reinforcing Mesh Test Results J (in-lbs) (oz/sq yd) J (in-lbs) Standard 3-6 (25-49) Standard (4.5) 4 (36) High (90-150) Medium (12.5) 12 (108) Ultra High >17 (>150) Strong (15) 18 (162) Ultra High >17 (>150) Ultra (20) 40 (352) C. Contractor Requirements: 1. Contractor shall have engaged in application of EIF Systems for a minimum of three (3) years. 2. Contractor shall have knowledge in the proper application of the UNI-TEX materials to be utilized on the project, and shall have certification of attending a UNITED COATINGS applicator training seminar. 3. Contractor shall employ skilled mechanics that are experienced and knowledgeable in proper EIFS installation, and are familiar with the specified work. 4. Contractor shall have successfully completed a minimum of three (3) EIFS projects of similar size to that specified herein. 5. Contractor shall provide the proper equipment, manpower and supervision on the jobsite to install the system in compliance with UNITED COATINGS' published specifications and details, as well as the project plans and details. D. Insulation Board Manufacturer Requirements: 1. The Insulation Board Manufacturer shall be recognized by UNITED COATINGS as being capable of producing EPS board to meet the system requirements, and hold a valid licensing agreement with UNITED COATINGS. 2. Insulation Board Manufacturer must be listed by an approved agency. 3. The insulation board must be labeled with information required by UNITED COATINGS, the approved listing agency and the applicable building codes. E. Mock-Up: 1. Construct a full-scale mock-up of the specified EIFS wall assembly using specified tools and materials. 2. Mock-Up shall comply with requirements contained within the project specifications. F. Inspections: 1. Provide third party inspection where required by code or contract documents. 2. Conduct inspection in accordance with code requirements and contract documents.

4 1.04 SUBMITTALS A. Product Data The Contractor shall submit to the Owner/Architect, Manufacturer s product data sheets describing the products that will be used on this project. B. Shop Drawings Provide drawings showing wall layout, all details, connections and expansion joints. C. Samples The Contractor shall submit to the Owner/Architect two samples of the UNI-TEX GUARDIAN System for each finish, texture and color to be used on the project. The same tools and techniques proposed for the actual installation shall be used. Samples shall be of sufficient size to accurately represent each color and texture to be utilized on the project. D. Test Reports When requested, the Contractor shall submit to the Owner/Architect copies of selected test reports verifying the performance of the UNI-TEX GUARDIAN System. E. Certificates: Submit a copy of Approved Applicator s current certificate of approval from the EIFS Manufacturer DELIVERY, STORAGE AND HANDLING A. Deliver all materials in their original, sealed containers, bearing Manufacturer's name and product identification. B. Protect all liquid components from freezing. Store away from direct sunlight. C. Protect Portland cement-based materials from moisture and humidity. Store these materials off the ground in a dry location SCHEDULE COORDINATION A. Provide site grading such that the EIFS terminates above the finish grade a minimum of 8" or as required by code. B. Coordinate the installation of roofing, windows, doors and other wall penetrations to provide a continuous air barrier. C. Provide protection of rough openings before installing windows, doors and other penetrations through the wall and provide sill flashings as per detail drawings. D. Coordinate installation of windows and doors so that air barrier components are connected to them in order to provide a continuous air barrier. E. Install window and door head flashing immediately after windows and doors are installed. F. Install diverter flashing wherever water can enter the wall assembly so that it is directed to the exterior. G. Install copings and sealant immediately after the base coat installation is dry. H. Attach penetrations through the EIFS to structural supports, and provide a watertight seal at all such locations PART II PRODUCTS 2.01 MANUFACTURER A. The Air/Moisture Barrier, Exterior Isulation Finish System and accessories must be supplied from a single-source Manufacturer or approved Supplier. B. The following are acceptable Manufacturers of the components contained within this specification: 1. UNITED COATINGS UNI-TEX GUARDIAN System 2. Plastic Components, Inc. Accessories 3. Vinyl Corp. - Accessories

5 2.02 AIR/MOISTURE BARRIER A. UNI-TEX GUARDIAN Joint Seal Trowel-applied, elastomeric joint sealer. B. UNI-TEX GUARDIAN Air/Moisture Barrier Fluid-applied, elastomeric air/moisture barrier for exterior wall sheathing ADHESIVE A. UNI-TEX Insulbond Non-cementitious, acrylic-based adhesive. B. UNI-TEX Wall-Bond 90 Basecoat/adhesive mixed at a 1:1 ratio by weight with Type I-II Portland cement INSULATION BOARD Nominal 1.0 lb/ft³ expanded polystyrene (EPS) insulation board in compliance with ASTM C578 Type I requirements, and EIMA Guideline Specification for EPS Insulation Board BASE COAT A. UNI-TEX Wall-Bond 70 Dry mix base coat/adhesive mixed with water at the jobsite. B. UNI-TEX Wall-Bond 90 Liquid polymer base coat/ adhesive, mixed 1:1 by weight with Type I-II Portland cement at the jobsite. C. UNI-TEX NCB Ready-to-use, non-cementitious base coat REINFORCING MESH A. Standard Mesh UNI-TEX Standard Mesh Nominal 4.5 oz./sq. yd., interlaced open-wave glass fiber fabric. (Exceeds Standard Impact Classification). B. High Impact Mesh UNI-TEX Strong Mesh Nominal 15 oz./sq. yd., high impact, double strand, interwoven, openweave glass fiber fabric PRIMER (Optional) A. UNI-TEX GUARDIAN Air/Moisture Barrier 100% acrylic waterproof coating, tinted to the same color as the UNI-TEX Finish, applied over the base coat application. B. Century % acrylic polymer, tinted to the same color as the UNI-TEX Finish, applied over the base coat application FINISH COAT Finishes: Shall be 100% acrylic, per the type, color and texture as selected by the Architect/Owner, in one or more of the following textures: a. Striato: Swirl texture b. Planato: Heavy Sand texture c. Veneto: Medium Sand texture d. Capri: Fine Sand texture e. Cortina: Free-Style texture 2.09 JOB-MIXED INGREDIENTS A. Clean potable water. B. Portland cement Type I-II if using Wall-Bond ACCESSORIES A. Starter Track - Plastic Components, Inc. B. Starter Track - Vinyl Corp.

6 PART III EXECUTION 3.01 INSTALLATION A. Application: GUARDIAN Joint Seal: Trowel GUARDIAN Joint Seal over all sheathing joints, rough openings, and inside and outside corners of building. Immediately embed UNI-TEX Detail Mesh in the GUARDIAN Joint Seal and trowel smooth. Sheathing joints require a minimum of 4" (10 cm) wide detail mesh. Rough openings and corners require a minimum of 9" (23 cm) wide detail mesh. Do not apply if GUARDIAN Joint Seal cannot cure prior to freezing temperatures, rain or heavy dew. Working time will decrease as surface and ambient temperatures increase. Allow to dry before proceeding with application of GUARDIAN Air/ Moisture barrier. GUARDIAN Air/Moisture: Apply GUARDIAN Air/Moisture to the prepared substrate using a ¾" (1.9 cm) nap roller or an airless sprayer with an output capacity of ¾ GPM min., screen size of 30 mesh or larger, and a reversible self-cleaning tip with an orifice size of.021" to.031" (.5 to.8 mm) and 40 to 50 degree fan. Apply a uniform coat over the entire substrate surface at a wet film thickness of 14 mils (356 microns). On applications over OSB a second coat of GUARDIAN Air/Moisture is required, applied in a continuous, uniform coat at a wet film thickness of 14 mils (356 microns). B. Curing and Drying: GUARDIAN Joint Seal is dry to the touch, and can be recoated in 2 hours under normal conditions at 75 F (24 C), 50% R.H. GUARDIAN Air/Moisture is dry to the touch, and be recoated if required, in 1½ hours under normal conditions at 75 F (24 C), 50% R.H. Wait 24 hours, or until coatings are cured (cool damp conditions will require longer periods to dry), before adhesive attachment of UNI-TEX foam board. Protect from rain and/or freezing temperatures until fully cured. C. Foam Installation: 1. Apply adhesive in a vertical ribbon onto EPS foam board, using a notched trowel. 2. For Insulbond Adhesive use a 3 /16" x ¼" x 1 ½" (5x6x38 mm) notched trowel. 3. For Wall-Bond products use a ½" x ½" x 2"(13 x 13 x 50 mm) notched trowel. D. Insulation Board Installation: 1. Precut insulation board as required to fit openings, corners and projections. 2. Begin application at the base of the wall, from a firm, permanent or temporary support. 3. Trowel-apply adhesive so that the entire surface of the insulation board is covered. The beads should stand out a minimum of 3 /8" (9 cm) from the surface, spaced approximately 1½" (3.8 cm) apart, and must run vertically with respect to the wall surface. Do not apply adhesive mixture to the sides of the insulation board. 4. Apply insulation board to the building substrate with the long edge oriented horizontally, and with its joints offset with respect to the substrate joints. Install using a running board pattern, tamping boards in place to ensure optimum adhesion. 5. Stagger joints of each successive row, and interlock boards at the corners. 6. EPS insulation board smaller than 24" X 48" (.6 to 1.2 m) may be used at corners and other such areas. E. Mesh & Base Coat Installation: 1. Reverse roll as necessary to eliminate the tendency of the mesh to curl. Include the following for Standard Mesh & Base Coat Installation 2. Standard Mesh & Base Coat: a. Using a stainless steel trowel, apply the base coat mixture to the EPS surface to a uniform thickness of 1 /16"(1.6 mm), or approximately 1½ times the thickness of the mesh. b. Using a stainless steel trowel, immediately embed the Standard Reinforcing Mesh into the wet base coat mixture. Work from the center of the mesh towards the edges to smooth out any wrinkles. c. Smooth the surface of the base coat mixture with the trowel until the reinforcing mesh is fully embedded. Add additional base coat as necessary to totally encapsulate the reinforcing mesh. d. The pattern of the mesh shall not reflect through the surface of the adhesive mixture. e. Overlap reinforcing mesh pieces a minimum of 2½" (6.4 cm) on all sides. f. For detailing around windows, doors, corners and other penetrations, see UNI-TEX GUARDIAN System details for proper back-wrapping instructions.

7 g. Provide a minimum of 24 hours cure time to allow the base coat to form a positive bond. h. Protect base coat from damage and inclement weather until fully cured. Include the following for Double Standard Mesh & Base Coat Installation 3. Double Mesh & Base Coat: Provide the following at ground floor applications, facades exposed to abnormal stress or at other potential impact areas. a. When double layers of Standard Reinforcing Mesh are used for local, or spot reinforcing, install the small reinforcement piece first. b. Install the first mesh layer as described in the Standard Mesh & Base Coat application procedure. c. After the base coat has sufficiently cured (approximately 24 hours), examine the surface for projections and loose strands of mesh. Correct as necessary to produce a flat surface. d. Install the second layer, as described in the Standard Mesh & Base Coat application procedure, over the first mesh layer. e. Offset the edges and seams of the mesh within the two layers. f. Provide a minimum of 24 hours cure time to allow the base coat to form a positive bond. g. Protect the base coat from damage and inclement weather until fully cured. Include the following for High-Impact Mesh or Intermediate Mesh & Base Coat Installation 4. High-Impact Mesh or Intermediate Mesh & Base Coat Installation: Provide the following at ground floor applications, facades exposed to abnormal stress or other potential impact areas: a. Using a stainless steel trowel, apply the base coat mixture to the EPS surface to a uniform thickness of 3 /32" (2.4 mm), or approximately 1½ times the thickness of the mesh. b. Immediately embed the High-Impact Mesh or Intermediate Mesh into the wet base coat mixture using a stainless steel trowel. Work the mesh into the base coat mixture, starting from the center of the mesh and working towards the edges while smoothing out wrinkles. c. Smooth the surface of the base coat mixture with the trowel until the reinforcing mesh is fully embedded. Add additional base coat as necessary to totally encapsulate the reinforcing mesh. d. The pattern of the mesh shall not reflect through the surface of the adhesive mixture. e. Ends of the adjacent heavy-duty mesh pieces shall be tightly butted, but not over-lapped. f. Provide a minimum of 24 hours cure time to allow the base coat to form a positive bond. g. Protect the base coat from damage and inclement weather until fully cured. h. After the base coat has cured, examine the surface for projections and loose strands of mesh. Correct as necessary to produce a flat surface. i. Install the second layer, consisting of base coat mixture and Standard Mesh, over the High- Impact or Intermediate Mesh layer as described in the Standard Mesh & Base Coat application procedure. F. Sealant: 1. System materials shall be fully cured prior to sealant installation. 2. Install sealant joints as per the UNI-TEX GUARDIAN System detail drawings. Also consult the Sealant Manufacturer for recommendations pertaining to project conditions. 3. Color of sealant shall either match the finish or be selected by the Architect or Owner. G. Finish Coating All Textures: 1. Using a clean, stainless steel trowel, apply finish continuously and in one operation to the entire wall surface, maintaining a wet edge to avoid cold joints. 2. Once finish has been evenly applied, tight float the wall using either a plastic trowel or other appropriate tool to achieve the desired texture. 3. Do not allow the finish to set up in any specific area without a natural termination point. 4. Work shall proceed from the center, working toward the joints and corners. 5. Until it is dry, protect the finish from airborne pollutants, weather and other possible surface contaminates FIELD QUALITY CONTROL A. The Contractor shall be responsible for the proper application of all UNI-TEX materials. B. UNITED COATINGS assumes no responsibility or liability for on-site inspection or application of its products. C. If required, the Contractor shall certify in writing the quality of work performed relative to the substrate, system details, installation procedures, workmanship and the specific products used.

8 D. If required, the EPS Supplier shall certify in writing that the EPS meets UNI-TEX GUARDIAN System specifications. E. If required, the Sealant Contractor shall certify in writing that the sealant application is in accordance with the Sealant Manufacturer s and UNITED COATINGS recommendations CLEANING A. All excess UNI-TEX GUARDIAN System materials shall be removed from the jobsite by the Contractor in accordance with contract provisions and as required by applicable law. B. All surrounding areas where the UNI-TEX GUARDIAN System has been installed shall be left free of debris and foreign substances resulting from the Contractor s work MAINTENANCE A. All UNI-TEX products are designed to minimize maintenance. However, as with all building products, depending on location, some cleaning may be required. Consult your UNITED COAT- INGS Maintenance Guidelines brochure or Representative for recommendations on cleaning and recoating of the UNI-TEX System. B. Sealants and flashings should be inspected on a regular basis, and repairs made as necessary. C. Provide the following materials for maintenance and repairs: 1. 1 gallon of each finish and color gallon of adhesive square feet of standard reinforcing mesh square feet of insulation board PROTECTION The UNI-TEX GUARDIAN System shall be protected from weather and other damage until permanent protection in the form of flashings, sealants, etc. are fully installed LIMITATIONS GUARDIAN system shall not be applied if ambient and or surface temperatures are 45 F (7 C) and falling, if the relative humidity is in excess of 95%, if there is a threat of rain or freezing temperatures within 4 hours of application, or if the dew point is less than 5 F (30 C) above the surface temperature. Do not use on damp surfaces, below grade, or on surfaces subject to immersion in water. Do not use over pressure treated or fire retardant treated wood surfaces. SPECIFICATION DETAILS This document contains the Manufacturer s Standard Specification for the UNI-TEX GUARDIAN System. These specifications follow the Construction Specification Institute s 3-part format. WARNING The UNI-TEX GUARDIAN System is designed as a barrier wall system, and includes details designed to prevent water from entering the System. These specifications should be followed, and proper details adhered to, in order to prevent water intrusion, which could result in damage to the System or other building elements. Care should be taken to insure that all building elements, including without limitations roof designs, windows, flashings, sealants, etc., are compatible with this System. DISCLAIMER Information contained in this specification conforms to standard detail and product recommendations for the installation of the UNI-TEX GUARDIAN System products as of the date of publication of this document, and is presented in good faith. UNITED COATINGS assumes no liability, expressed or implied, as to the architecture, engineering or workmanship of any project. To insure that you are using the latest, most complete information, contact UNITED COATINGS Technical Services Department at: / Fax: Website: Member E. Cataldo Ave. Greenacres, WA (509) Fax: (509) (800) Northwest Wall and Ceiling Bureau Our products are guaranteed to meet established quality control standards. Information contained in our technical data is based on laboratory and field testing, but is subject to change without prior notice. No guarantees of accuracy are given or implied, nor does UNITED assume any responsibility for coverage, performance or injuries resulting from storage, handling or use of our products. Liability, if any, is limited to product replacement or, if applicable, to the terms stated within the executed project warranty.