Specification:Surface preparation and repainting of masonry surfaces

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=GENERAL=

SECTION INCLUDES
 Surface preparation of masonry for painting. Application of paint on masonry surfaces. 

RELATED SECTIONS
 04100 – Historic Mortar 04110 – Historic Stucco 04211 – Historic Brick 04400 - Stone 04510 – Masonry Cleaning</li> 07100.01 – Water Repellent Properties and Application</li> </ol>

SUBMITTALS
<ol type="A"> Submit a detailed schedule to architect for approval of work under this section, including an assessment of the problem areas and historic paint analysis.</li> Testing:  Provide paint analysis to determine appropriate paint colors for the restoration period and paint composition, as appropriate. Paint color shall be matched to a manufacturer’s standard color if available or provided in the form of a notation in a standardized color system such as CIE L*a*b* that can be duplicated by a paint manufacturer. Munsell notations are not acceptable. This work must be performed by an architectural conservator specializing in analysis of historic paints and finishes.</li> </ol> </li> Product Literature:  Submit manufacturer’s product literature to architect for all manufactured products specified for paint work. Product literature shall include specification data, Material Safety Data Sheets and instructions for storage, handling and use.</li> </ol> </li> Samples: The Contractor shall submit samples of the following paint materials for approval of color match and texture match. No work shall proceed until all samples are approved.  Color samples: Prepare at least three portable samples approximately 6 inches by 6 inches of each standard and custom color as identified by the historic paint analysis. Once a matching paint color is achieved, placement of on-site mock-ups may begin.</li> Drawdown samples: Once a paint supplier has been determined for the project, provide drawdown samples (6 inches by 6 inches minimum) of the actual paint to be used on the project for comparison with previously approved samples. Provide one drawdown sample for each color / gloss to be used on the project.</li> </ol> </li> </ol>

QUALITY ASSURANCE
<ol type="A"> Work Experience: The contractor shall perform the work in this section shall have a minimum of ten (10) years experience with historic masonry paint work. He/she shall demonstrate a working knowledge of the Secretary of the Interior’s Standards for Guidelines for Historic Preservation.</li> The Contractor shall not change sources or manufacturers of paint materials during the course of the work.</li> Warranty: Installer shall provide a warranty, in writing, against defects in material and installation for a period of two (2) years after substantial completion of the work to make immediate repairs as required to correct defects in the work regardless of the nature of the defect except repairs required due to abuse, alterations or failure of the substrate.</li> </ol>

MOCK-UPS
<ol type="A"> After selection of a paint color from the portable samples, the Contractor shall prepare one mock-up installation for each color to be installed at locations selected by the Architect. If cleaning tests are also to take place, test panels should in the same area. Test panels should not be undertaken in areas that are not highly visible. Each test panel shall be executed in the same manner as the final installation. Test panels shall be a minimum area 3 feet by 3 feet. Test panels will be inspected for color and application technique.</li> <li>The Contractor shall prepare up to three additional mock-ups of each paint color at no additional cost to the Owner. Approved test area(s) shall become part of the work and shall serve as the quality standard for all subsequent work.</li> </ol>

DELIVERY, STORAGE AND HANDLING
<ol type="A"> <li>Deliver all products to the site in original packaging, unopened, and undamaged, with manufacture’s name and product identification visible thereon, manufacturer’s instructions and Material Safety Data Sheets.</li> <li>Store products in a dry location and protected from dampness, heat and freezing following manufacturer’s instructions.</li> </ol>

PROJECT / SITE CONDITIONS
<ol type="A"> <li>Normal conditions for the work of this Section shall be defined as when the air and surface temperatures are 50 degrees F and rising or less than 90 degrees F and falling.</li> <li>Do not apply paint when the relative humidity exceeds 85%. Drying times are also affected by relative humidity. Those stated by manufactures are generally based on 50% RH and at approximately 77 degrees F.</li> <li>Work shall not commence when rain, snow or below-freezing temperatures are expected within the next 24 hours. All surfaces shall be free of standing water, frost, and ice.</li> <li>Do not apply paint in the direct sun. Paint shall be applied only when the surface to be painted is in the shade and the sun is shining on the opposite elevation.</li> <li>The contractor is responsible for protecting existing adjacent materials and surfaces, and substrate during the execution of the work. Provide all necessary protection and work procedures to avoid damage to existing material assemblies not a part of the work in the Section.</li> <li>Provide visible barriers and / or warning tape around the perimeter of the work area for visitor protection. Protect nearby vehicles and adjacent structures from damage during the course of the work.</li> <li>Contractor shall coordinate paint work with the other trades involved in exterior and interior restoration work including, but not limited to, masonry cleaning, masonry restoration, and sealants.</li> <li>Lead Based Paint: <ol> <li>Many of the areas to be prepared for repainting retain coatings from the nineteenth and twentieth centuries.</li> <li>The Contractor should therefore assume that all existing painted surfaces contain lead unless tested to show otherwise, and shall take the following precautions:</li> <li>Take all necessary actions and precautions to assure safety of the public, property and the environment and the workers in scraping, sanding, removing and disposing of any existing paint.</li> <li>This includes compliance with all applicable regulations including, but not limited to, the following: <li>OSHA 29 CFR 1926.62 (Lead in construction).</li> <li>OSHA 29 CFR 1910.134 (Respiratory protection).</li> <li>OSHA Hazard Communication Standard.</li> <li>Compliance with all other applicable health, safety and environmental requirements of the government agencies having jurisdiction including, but not limited to: <li>State Department of Environmental Resources;</li> <li>State Department of Labor;</li> <li>State Department of Health;</li> <li>Federal OSHA;</li> <li>Federal Environmental Protection Agency.</li> <li>Comply with requirements of governmental agencies having jurisdiction over this work, including compliance with volatile organic compounds/ volatile organic solvent regulations and abrasive surface preparation.</li> </ol> </li> </ol> </li> </ol> </li> </ol>

=PRODUCTS=

MANUFACTURERS
<ol type="A"> <li>Benjamin Moore</li> <li>Pittsburgh Paints</li> <li>Pratt & Lambert</li> <li>Finnaren and Haley</li> <li>Sherwin-Williams</li> <li>MAB Paints</li> <li>ProSoCo, Inc.</li> <li>Keim</li> <li>Architect approved equal.</li> </ol>

PAINT MATERIALS
<ol type="A"> <li>Acrylic Latex Paint: Provide best quality grade of various types of coatings as regularly manufactured by acceptable manufacturers. Materials not displaying manufacturer’s identification as a best-grade product will be rejected. <ol> <li>Acrylic latex paints are recommended over vinyl acetate latex paints because the acrylics are more alkali resistant, important when painting masonry substrates such as stucco or brick. Latex paints are more flexible and breathe more than oil paints do.</li> <li>Breathable, water-based, siliconized acrylic resin coatings may be preferable to standard latex trim paints. Acceptable products include the following <li>Acra-Lastic 1400 as manufactured by MAB Paints</li> <li>BMC II Breathable Masonry Coating as manufactured by ProSoCo, Inc.</li> <li>Architect approved equal.</li> </ol> </li> </ol> </li> <li>Oil/alkyd based paints: Provide best quality grade of various types of coatings as regularly manufactured by acceptable manufacturers. Materials not displaying manufacturer’s identification as a best-grade product will be rejected.</li> <li>Inorganic Paint: Potassium silicate-based paints. Acceptable products include the following: <ol> <li>Keim Mineral Systems as distributed by INT-EXT Environmental Finishes, San Angelo, TX</li> <li>Silin Mineral Silicate Finish as distributed by Cathedral Stone Products, Jessup, MD</li> <li>Architect approved equal</li> </ol> </li> <li>Casein Paint (milk-based paint): Factory-mixed with non-fading pigments. Acceptable manufacturers include the following: <ol> <li>Old Village Paints, Fort Washington, PA</li> <li>The Old-Fashioned Milk Paint Company, Groton, MA</li> <li>Architect approved equal.</li> </ol> </li> </ol>

ACCESSORY MATERIALS
<ol type="A"> <li>Masonry conditioner / sealer if recommended by paint manufacturer. Sealers may trap moisture within the masonry causing spalling or paint / sealer failure.</li> <li>Mineral Spirits, as recommended by paint manufacturer. <ol> <li>A petroleum distillate that is used especially as a paint or varnish thinner.</li> <li>Other chemical or common names include: Benzine (not Benzene); Naphtha; Petroleum spirits, Solvent naphtha.</li> </ol> </li> <li>Linseed Oil, raw or boiled, or other oils can be added to Casein paint.</li> </ol>

EQUIPMENT
<ol type="A"> <li>Brushes <ol> <li>Use nylon bristle brushes for water-based paints.</li> <li>Use natural bristle brushes (pre-conditioned by soaking in linseed oil for 24 hours) for oil-based paints.</li> <li>Most kinds of brushes (Stiff white brushes, soft hair brushes, oil brushes, etc) can be used for potassium and casein paints depending on the desired effect.</li> <li>Do NOT use the same brush for different types of paint.</li> </ol> </li> <li>Low Pressure Water Spray Equipment</li> <li>Paint Rollers and Paint Tray</li> <li>Low Pressure Paint Sprayer, equipped with solvent-resistant fittings and hoses if required.</li> <li>Clean metal and plastic containers for mixing</li> </ol> =EXECUTION=

GENERAL
<ol type="A"> <li>All masonry repair and repointing work shall be completed prior to paint work.</li> <li>Remove all hardware, hardware accessories, light fixtures, downspouts and boots, and similar items. Following completion of painting, reinstall removed items.</li> <li>The Contractor shall protect adjacent materials, openings and assemblies from paint spatters and overspray.</li> <li>Masonry cleaning shall be performed prior to paint work. Do not paint over dirt, rust, scale, grease, moisture, or conditions otherwise detrimental to formation of a curable paint film.</li> </ol>

PREPARATION
<ol type="A"> <li>Perform preparation and cleaning procedures in accordance with paint manufacturer’s instructions and as herein specified, for each substrate condition and paint type.</li> <li>Clean surfaces to be painted before applying paint or surface treatments. Program cleaning and painting so that contaminants from cleaning process will not fall onto wet, newly-painted surfaces. For guidance on cleaning exterior masonry see 04510 – Masonry Cleaning.</li> <li>Surfaces shall be free of loose or peeling paint, vegetation and other foreign substances. Remove surface debris with scrapers, stiff bristles brushes (DO NOT use metal brushes) and mineral spirits as required. Wash entire surface with a water-soluble detergent and rinse thoroughly with clean water to remove residue.</li> <li>Remove Old Chalking Paint: Wash surfaces with a non-ionic detergent using low pressure water (up to 500 psi depending on the condition of the substrate).</li> <li>If recommended by the paint manufacturer, apply a masonry conditioner / sealer thinned according to manufacturer’s instructions, as required. <ol> <li>Apply to a dry clean surface using brush, roller, or spray. Apply only as much as surface will absorb.</li> <li>Allow to dry according to manufacturer’s instructions.</li> </ol> </li> </ol>

PAINT APPLICATION
<ol type="A"> <li>Mix and prepare painting materials in accordance with manufacturer’s directions. <ol> <li>Store materials not currently in use in tightly covered containers.</li> <li>Mixing and preparation of paint shall be in clean containers, free of foreign materials and residue.</li> <li>Stir materials before application to produce a mixture of uniform density and stir as required during application. Do NOT stir surface film into material. Remove surface film and strain if necessary.</li> </ol> </li> <li>Follow manufacturer’s instructions when applying paint. All paint selection must be approved by the Architect, prior to start of work. <ol> <li>Brush apply at least 2 coats of paint to insure complete coverage. Spray or roller equipment may also be used if permitted by paint manufacturer. NOTE: Some paint manufacturers do not recommend roller application so check for proper applications methods.</li> <li>Allow adequate drying times between coats of paint.</li> </ol> </li> <li>Oil / Alkyd Paint: When oil / alkyd paint is being used, and unless a masonry conditioner / sealer has been used, any new mortar patches must be allowed to cure for at least a year before painting. Apply two top coats, using a brush for complete coverage.</li> <li>Upon completion of paint work, clean window glass and other paint-spattered surfaces. Remove spattered paint by proper methods of washing and scraping, using care not to scratch or to otherwise damage finished surfaces.</li> <li>At completion of work, including work of other trades, touch-up and restore all damaged or defaced painted surfaces.</li> </ol>

FINAL REPORT
<ol type="A"> <li>Provide a final report of complete work including all approved submittals and photographs of the repaired areas taken before, during and after the work.</li> </ol>