Suggested Specification for Tri-Patch Versatile Concrete Patching Compound

Transcription

1 Suggested Specification for Tri-Patch Versatile Concrete Patching Compound SURFACE PREPARATION for Interior and Exterior Floor-Covering Installations. (Vinyl Composition Tiles, Sheet Vinyl, Rubber, Indoor Carpet, Linoleum, Glue-Down Wood, and Cork for interior installations, as well as Vinyl Decking, Outdoor Carpet and Ceramic Tile for exterior installations.) ** NOTES TO SPECIFIER ** This section is based on the products of MAPEI Corporation, which is located at: 1144 East Newport Center Drive Deerfield Beach, FL US-MAPEI or SECTION Hydraulic Cement Underlayment Specify Tri-Patch (mixed with water) for interior use as a fast-setting patching material for concrete, up to 1 (2,5 cm) thick. Specify Tri-Patch (mixed with water) for interior use for filling holes, cracks and voids in approved wood underlayments. Specify Tri-Patch (mixed with water or Patch Enhancer) for interior use for skim-coating concrete and approved wood underlayments. Specify Tri-Patch (mixed with water) for interior use as a fast-setting material for leveling low spots and depressions in concrete up to 1 (2,5 cm) thick. Specify Tri-Patch (mixed with water) for interior ramping (doorways, thresholds, etc.) up to 4 (10 cm) thick. Specify Tri-Patch for interior use mixed with Patch Enhancer (supreme liquid admixture) as an embossing leveler over existing, properly prepared and firmly bonded felt-back sheet vinyl (vinyl or urethane wear layers); one layer of vinyl asbestos tile (VAT) or vinyl composition tile (VCT); ceramic tile; cement terrazzo; and cutback adhesive residue, up to 1/16 (1,5 mm) thick. Specify Tri-Patch (mixed with water) for exterior use as a fast-setting material for leveling low spots and for filling holes, cracks, and voids in exterior horizontal concrete surfaces up to ¼ (6 mm) thick. Specify Tri-Patch mixed with Patch Enhancer for skimcoating and smoothing rough exterior horizontal concrete surfaces up to 1/16 (1,5 mm) thick. Specify Tri-Patch for exterior use ONLY in climates that are not subject to seasonal low temperatures below 5 F (-15 C.) Specify Tri-Patch to be covered with a final flooring material (not to be left exposed as a wear surface). PART 1 GENERAL

2 1.1 SUMMARY A. This is the suggested specification for Tri-Patch versatile, fast-setting cement-based patching material for correcting substrate imperfections in concrete and approved wood underlayments before the installation of floor coverings. 1.2 REFERENCES A. PREPARING CONCRETE a. ASTM F710 Standard Practice for Preparing Concrete to Receive Resilient Flooring B. MOISTURE VAPOR EMISSION a. ASTM F1869 Test Method for Measuring Moisture Vapor Emission Rate of Concrete Subfloor Using Calcium Chloride C. PLYWOOD a. ASTM F1482 Standard Practice for Installation and Preparation of Panel Type Underlayments to Receive Resilient Flooring b. Installation and Preparation of Plywood Underlayment for Resilient Floor Covering APA The Engineered Wood Association c. CSA 0121 Douglas fir plywood d. CSA 0151 Canadian softwood plywood e. CCMC Structure wood underlayment f. PS 1-95 U.S. Product Standard 1.3 SUBMITTAL A. PRODUCT DATA a. Submit manufacturer s technical information (Technical Data Sheets and corresponding Technical Bulletins) for installation instructions and limitations from the floor-covering, adhesive, and surface-preparation product manufacturer for all specified materials. b. Consult with manufacturer(s) for warranty information. 1.4 QUALITY ASSURANCE A. Obtain hydraulic cement underlayment (and additive) from a single source. 1.5 DELIVERY, STORAGE AND HANDLING A. Deliver and store surface-preparation product(s) in original, unopened containers, fully identified with name, brand, type and grade. B. Handle and store the surface-preparation product(s) in a manner to prevent damage or contamination by water, moisture, freezing, excessive heat, foreign matter or other causes. C. Provide dry, heated storage on site and deliver all materials at least 24 hours before work begins. 1.6 ENVIRONMENTAL REQUIREMENTS A. Ambient temperature must be between 50 F and 100 F (10 C and 38 C). B. Do not begin installation until building is completely enclosed, HVAC system is operating and maintaining temperature, and humidity conditions are consistent with after occupancy conditions for a minimum of 2 weeks. C. Turn off all forced ventilation and floor heating systems prior to installation, and protect work against drafts during installation and for a period of at least 48 hours after completion to prevent damage to substrates, installation products and flooring materials. Use indirect auxiliary heaters to maintain the temperature in the area at the recommended workable level. Vent temporary heaters to the exterior to prevent carbonation. D. In exterior applications the entire installation area must be sheltered and covered from rain and adverse weather conditions during the installation. Tri-Patch must remain protected until after the final installation of floor covering.

3 1.7 SPECIAL WARRANTY A. Tri-Patch a. 10-Year Limited Warranty This can be found at B. Tri-Patch / Patch Enhancer a. 10-Year Limited System Warranty This can be found at PRODUCTS 2.1 MANUFACTURER A. Acceptable Manufacturer: MAPEI Corporation, 1144 East Newport Center Drive, Deerfield Beach, FL US-MAPEI or B. Substitutions: [Under provisions of Section ] [Not permitted] 2.2 HYDRAULIC CEMENT UNDERLAYMENT A. Tri-Patch: Versatile, fast-setting, cement-based patching material with a smooth finish surface and a high compressive strength for correcting substrate imperfections in concrete and approved wood underlayments before the installation of floor coverings. a. Mix Tri-Patch with water and use interior: i. For patching concrete, up to 1" (2,5 cm) thick. ii. For filling holes, cracks and voids in approved wood underlayments. iii. For skim-coating concrete and approved wood underlayments. iv. For leveling low spots and depressions in concrete, up to 1" (2,5 cm) thick. v. For ramping up to 4" (10 cm) thick. b. Mix Tri-Patch with water and use exterior: i. For leveling low spots and for filling holes, cracks, and voids in concrete, up to ¼. B. Patch Enhancer: Ready-to-use, one-component, concentrated admixture designed to enhance the performance of MAPEI s Tri-Patch versatile concrete patching compound. a. Mix Patch Enhancer with Tri-Patch and apply up to 1/16" (1,5 mm) thick: i. For covering interior embossed surfaces such as existing, properly prepared and firmly bonded sheet vinyl (vinyl or urethane wear layers), and one layer of vinyl asbestos tile (VAT) or vinyl composition tile (VCT); ceramic tile; cement terrazzo; and cutback adhesive residue ii. For skimcoating and smoothing exterior horizontal concrete surfaces. NOTE: Tri-Patch (and Patch Enhancer) qualifies for contribution towards points with Green Building Council LEED projects. PART 3 EXECUTION 3.1 EXAMINATION A. Before work commences, examine the areas to receive the floor covering, and report any deficiency or adverse conditions in writing to the general contractor and the architect. Do not proceed with the work until the surfaces and conditions comply with the requirements indicated in the manufacturer s instructions. 3.2 SURFACE PREPARATION A. All substrates must be structurally sound, dry, solid and stable. The substrate should be clean and free of dust, dirt, oil, grease, paint, curing compounds, concrete sealers, loosely bonded

4 toppings, old adhesive residues (unless otherwise recommended by MAPEI) and any other substance that may prevent or reduce adhesion. If the substrate contains these substances, they must be mechanically removed. WARNING: Certain paints may contain lead. Exposure to excessive amounts of lead dust presents a health hazard. Refer to applicable federal, state, provincial and local laws and Lead-Based Paint Interim Guidelines for Hazard Identification and Abatement in Public and Indian Housing (Sept. 1990) or subsequent editions published by the U.S. Department of Housing and Urban Development regarding (1) appropriate methods for identifying lead-based paint and removing such paint; and (2) any licensing, certification and training requirements for persons performing lead abatement work. B. In all cases, the structural design of floors shall not allow a deflection of more than 1/360 of span under live or dead loads. C. Do not apply MAPEI surface-preparation products directly over gypsum-based surfaces, over gypsum-based floor patches, over gypsum-based levelers, nor over any existing nonapproved patching compounds or nonapproved leveling materials. D. Refer to flooring manufacturer s guidelines and comply with requirements of referenced industry standards regarding surface preparation requirements. 3.3 CONCRETE SUBSTRATES A. The specific composition of the concrete should be in accordance with the guidelines and practices of the American Concrete Institute standards (ACI). The concrete should have a minimum density of 100 lbs. per cu. ft. (1,600 kg per m 3 ). B. All concrete substrates must be fully cured and free of any hydrostatic and/or moisture problems. The moisture vapor emission from a concrete slab must not exceed 5 lbs. per 1,000 sq. ft. (2,27 kg per 92,9 m 2 ) per 24 hours as measured by the anhydrous calcium chloride test kit based upon test method ASTM F1869. Use a MAPEI moisture vapor emission reduction system to treat concrete slabs with moisture issues. Consult MAPEI Technical Services for product recommendations. Refer to Technical Data Sheets for instructions. C. Do not install where a moisture problem is expected. A moisture barrier with a permeance of less than 0,2 metric perms as measured by the ASTM-96 standard must be present under concrete slabs that are on or below grade. This barrier must be resistant to deterioration as well as to puncture during construction, and must remain intact and continuous. D. Perform 2 ph alkalinity tests for every calcium chloride test; ph levels between 5 and 9 are satisfactory according to industry standards. Correct areas that are below or above the range. Consult MAPEI Technical Services for recommendations on correcting ph levels outside the range. 3.4 WOOD SUBSTRATES (interior only) A. All wood underlayments must be recommended and guaranteed by either the wood underlayment manufacturer or the floor-covering manufacturer such APA-rated Group 1 exterior-grade plywood, CC-plugged or better conforming to U.S. Product Standard PS 1-95 or COFI-classified SELECT or (SEL-TF) exterior-grade plywood conforming to CSA-0121 Standard for Douglas fir. B. Install plywood according to the plywood manufacturer s written instructions. C. Plywood surfaces must be installed with the smooth side facing up. D. In any floor-covering installation, the plywood should be dry and the moisture content should not exceed the moisture content recommended by the wood and/or flooring manufacturer, generally 6% to 12% when measured with a quality wood moisture meter. E. Wood decking and plywood substrates are NOT recommended for exterior installations. For exterior applications, Tri-Patch can only be applied over fully cured concrete. 3.5 EXISTING FLOOR COVERINGS (interior only)

5 A. Existing noncushioned felt-back sheet vinyl, VAT, VCT, ceramic tile and cement terrazzo must be firmly bonded, clean and free of dust, dirt, oil, grease, paint, wax, sealer, soap, and any other substance that may prevent or reduce adhesion. B. Noncushioned sheet vinyl with a vinyl or urethane wear layer must be fully adhered (not perimeter-glued) and limited to one layer only. New felt-back sheet vinyl and felt-back sheet vinyl with a urethane wear layer must be slightly roughened to dull the finish (60-grit sandpaper is recommended). The wear layer must remain intact, and the underlying sheetvinyl paper should not become exposed. The area must then be vacuumed, mopped and allowed to dry completely. C. VAT and VCT are limited to one layer only. A commercial-grade wax stripper must be used to remove any dirt, oil, grease, wax, sealer, etc. The area must be neutralized, rinsed well with clean water and allowed to dry completely. D. Ceramic tile and cement terrazzo must be roughened by sanding or shotblasting. The area must then be vacuumed, mopped and allowed to dry completely. E. Existing floor coverings such as self-stick tile, glass tile, linoleum, laminate, fiberglass, poured epoxy floors and other dimensionally unstable and/or nonporous materials, are not acceptable for the installation of MAPEI surface-preparation products. 3.6 CUTBACK ADHESIVE RESIDUE A. Cutback adhesive ridges and all loose areas of cutback adhesive must be removed. Only the residue (the black stain embedded in the surface of the concrete) should remain. The area must then be vacuumed, mopped and allowed to dry completely. B. Do not use chemical solvents to remove cutback adhesive or even to soften it to aid in the removal. 3.7 INSTALLATION A. Mix product according to the package directions. Use mixing ratios specified for the specific type of use and application. Refer to Technical Data Sheets for detailed mixing instructions. B. Apply mixed product to the area needing repair, leveling, skim-coating, ramping or covering. C. Fill, spread, shape, smooth and feather out as needed using a flat-edge steel trowel. Refer to Technical Data Sheets for detailed installation instructions. D. Clean tools immediately with water, while material is fresh. E. Do not cover or fill any expansion or control joints. 3.8 PROTECTION A. Protect the installation from excessive heat, drafty conditions during the curing period. B. In exterior installations, protect from rain and adverse weather conditions during the curing period and until after the final installation of floor covering. C. Protect from traffic, dirt, dust and contaminants until the final installation of floor covering. END OF SECTION