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HomeMy WebLinkAbout06 20 13 Exterior Finish CarpentryTHE KENT 06 20 13 - THE KENT Issue Date 05.09.18 EXTERIOR FINISH CARPENTRY THE KENT SECTION 06 20 13 - EXTERIOR FINISH CARPENTRY PART 1 - GENERAL 1.1 RELATED DOCUMENTS A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section. 1.2 SUMMARY A. Section Includes: 1. Exterior wood trim. B. Related Requirements: 1. Section 06 10 00 "Rough Carpentry" for furring, blocking, and other carpentry work not exposed to view. 2. Section 09 91 00 "Painting" for priming and back-priming of exterior finish carpentry. 1.3 DEFINITIONS A. MDO: Plywood with a medium-density overlay on the face. 1.4 ACTION SUBMITTALS A. Product Data: For each type of process and factory-fabricated product. Indicate component materials, dimensions, profiles, textures, and colors and include construction and application details. 1. Include data for wood-preservative treatment from chemical-treatment manufacturer and certification by treating plant that treated materials comply with requirements. Indicate type of preservative used and net amount of preservative retained. Include chemical- treatment manufacturer's written instructions for finishing treated material. 2. Include data for fire-retardant treatment from chemical-treatment manufacturer and certification by treating plant that treated materials comply with requirements. 3. For products receiving a waterborne treatment, include statement that moisture content of treated materials was reduced before shipment to Project site to levels specified. B. Samples for Initial Selection: For each type of product involving selection of colors, profiles, or textures. C. Samples for Verification: 1. For each species and cut of lumber and panel products, with half of exposed surface finished; 50 sq. in. for lumber and 8 by 10 inches for panels. THE KENT 06 20 13 - THE KENT Issue Date 05.09.18 EXTERIOR FINISH CARPENTRY THE KENT 1.5 INFORMATIONAL SUBMITTALS A. Compliance Certificates: 1. For lumber that is not marked with grade stamp. 2. For preservative-treated wood that is not marked with treatment-quality mark. 3. For fire-retardant-treated wood that is not marked with classification marking of testing and inspecting agency. B. Evaluation Reports: For the following, from ICC-ES: 1. Wood-preservative-treated wood. 2. Fire-retardant-treated wood. C. Sample Warranties: For manufacturer's warranties. 1.6 QUALITY ASSURANCE A. Testing Agency Qualifications: For testing agency providing classification marking for fire- retardant-treated material, an inspection agency acceptable to authorities having jurisdiction that periodically performs inspections to verify that the material bearing the classification marking is representative of the material tested. B. Manufacturer Qualifications: Refer to Specification Section 01 40 00 “Quality Requirements.” 1.7 DELIVERY, STORAGE, AND HANDLING A. Stack lumber, plywood, and other panels flat with spacers between each bundle to provide air circulation. Protect materials from weather by covering with waterproof sheeting, securely anchored. Provide for air circulation around stacks and under coverings. 1.8 FIELD CONDITIONS A. Weather Limitations: Proceed with installation only when existing and forecast weather conditions permit work to be performed and at least one coat of specified finish can be applied without exposure to rain, snow, or dampness. B. Do not install finish carpentry materials that are wet, moisture damaged, or mold damaged. 1. Indications that materials are wet or moisture damaged include, but are not limited to, discoloration, sagging or irregular shape. 2. Indications that materials are mold damaged include, but are not limited to, fuzzy or splotchy surface contamination and discoloration. PART 2 - PRODUCTS 2.1 MATERIALS, GENERAL A. Lumber: DOC PS 20 and applicable rules of grading agencies indicated. THE KENT 06 20 13 - THE KENT Issue Date 05.09.18 EXTERIOR FINISH CARPENTRY THE KENT B. Factory mark each piece of lumber with grade stamp of inspection agency, indicating grade, species, moisture content at time of surfacing, and mill. 1. For exposed lumber, mark grade stamp on end or back of each piece or omit grade stamp and provide certificates of grade compliance issued by inspection agency. 2.2 WOOD-PRESERVATIVE-TREATED MATERIALS A. Water-Repellent Preservative Treatment by Non-Pressure Process: AWPA N1; dip, spray, flood, or vacuum-pressure treatment. 1. Preservative Chemicals: 3-iodo-2-propynyl butyl carbamate (IPBC), combined with an insecticide containing chloropyrifos (CPF). 2. Use chemical formulations that do not bleed through or otherwise adversely affect finishes. Do not use colorants in solution to distinguish treated material from untreated material. 3. Application: Items not required to be pressure-preservative treated. B. Preservative Treatment by Pressure Process: AWPA U1; Use Category UC3b. 1. Kiln dry lumber and plywood after treatment to a maximum moisture content of 19 and 18 percent, respectively. 2. Preservative Chemicals: Acceptable to authorities having jurisdiction and containing no arsenic or chromium. 3. For exposed items indicated to receive transparent finish, do not use chemical formulations that contain colorants or that bleed through or otherwise adversely affect finishes. 4. Do not use material that is warped or does not comply with requirements for untreated material. 5. Mark lumber with treatment-quality mark of an inspection agency approved by the American Lumber Standard Committee's Board of Review. a. For exposed lumber indicated to receive a stained or natural finish, mark end or back of each piece or omit marking and provide certificates of treatment compliance issued by inspection agency. 6. Mark plywood with appropriate classification marking of an inspection agency acceptable to authorities having jurisdiction. a. For exposed plywood indicated to receive a stained or natural finish, mark back of each piece. 7. Application: Where indicated. 2.3 EXTERIOR TRIM A. Lumber Trim for Painted Finish: 1. Species and Grade: Hem-fir, Prime or D finish or 1 Common; NLGA, WCLIB, or WWPA. 2. Species and Grade: Eastern white pine, eastern hemlock-balsam fir-tamarack, eastern spruce, or white woods, D Select (Quality) Finish or 1 Common (Colonial); NeLMA, NLGA, WCLIB, or WWPA. 3. Maximum Moisture Content: 15 percent. 4. Finger Jointing: Allowed if made with wet-use adhesive complying with ASTM D 5572. 5. Face Surface: Surfaced (smooth). 6. Factory Priming: Factory coated on faces and edges, with exterior primer compatible with topcoats specified. THE KENT 06 20 13 - THE KENT Issue Date 05.09.18 EXTERIOR FINISH CARPENTRY THE KENT B. Moldings for Painted Finish: MMPA WM 4, P-grade wood moldings. Made from kiln-dried stock to patterns included in MMPA's "WM/Series Wood Moulding Patterns." 1. Species: Eastern white, Idaho white, lodgepole, ponderosa, radiata, or sugar pine. 2. Finger Jointing: Not allowed. 3. Factory Priming: Factory coated on faces and edges, with exterior primer compatible with topcoats specified. 4. Brick-Mold Pattern: WWMPA WM 180, 1-1/4 by 2 inches. 5. Drip-Cap Pattern: WWMPA WM 197, 11/16 by 1-5/8 inches. 6. Bed-Mold Pattern: WWMPA WM 75, 9/16 by 1-5/8 inches. 7. Screen-Bead Pattern: WWMPA WM 144, 1/4 by 3/4 inch. 2.4 MISCELLANEOUS MATERIALS A. Fasteners for Exterior Finish Carpentry: Provide nails or screws, in sufficient length to penetrate not less than 1-1/2 inches into wood substrate. 1. For prefinished items, provide matching prefinished aluminum fasteners where face fastening is required. 2. For applications not otherwise indicated, provide stainless-steel fasteners. B. Wood Glue: Waterproof resorcinol glue recommended by manufacturer for exterior carpentry use. C. Flashing: Comply with requirements in Section 07 62 00 "Sheet Metal Flashing and Trim" for flashing materials installed in exterior finish carpentry. D. Sealants: Latex, complying with ASTM C 834 and applicable requirements in Section 07 92 00 "Joint Sealants" and recommended by sealant and substrate manufacturers for intended application. 2.5 FABRICATION A. Back out or kerf backs of standing and running trim wider than 5 inches, except members with ends exposed in finished work. B. Ease edges of lumber less than 1 inch in nominal thickness to 1/16-inch radius and edges of lumber 1 inch or more in nominal thickness to 1/8-inch radius. PART 3 - EXECUTION 3.1 EXAMINATION A. Examine substrates, with Installer present, for compliance with requirements for installation tolerances and other conditions affecting performance of the Work. B. Examine finish carpentry materials before installation. Reject materials that are wet, moisture damaged, and mold damaged. C. Proceed with installation only after unsatisfactory conditions have been corrected. THE KENT 06 20 13 - THE KENT Issue Date 05.09.18 EXTERIOR FINISH CARPENTRY THE KENT 3.2 PREPARATION A. Clean substrates of projections and substances detrimental to application. B. Prime lumber and moldings to be painted, including both faces and edges, unless factory primed. Cut to required lengths and prime ends. Comply with requirements in Section 09 91 00 "Painting." 3.3 INSTALLATION, GENERAL A. Do not use materials that are unsound, warped, improperly treated or finished, inadequately seasoned, or too small to fabricate with proper jointing arrangements. 1. Do not use manufactured units with defective surfaces, sizes, or patterns. B. Install exterior finish carpentry level, plumb, true, and aligned with adjacent materials. Use concealed shims where necessary for alignment. 1. Scribe and cut exterior finish carpentry to fit adjoining work. Refinish and seal cuts as recommended by manufacturer. 2. Install to tolerance of 1/8 inch in 96 inches for level and plumb. Install adjoining exterior finish carpentry with 1/32-inch maximum offset for flush installation and 1/16-inch maximum offset for reveal installation. 3. Coordinate exterior finish carpentry with materials and systems in or adjacent to it. Provide cutouts for mechanical and electrical items that penetrate exterior finish carpentry. 3.4 STANDING AND RUNNING TRIM INSTALLATION A. Install flat-grain lumber with bark side exposed to weather. B. Install cellular PVC trim to comply with manufacturer's written instructions. C. Install trim with minimum number of joints as is practical, using full-length pieces from maximum lengths of lumber available. Do not use pieces less than 24 inches long, except where necessary. 1. Use scarf joints for end-to-end joints. 2. Stagger end joints in adjacent and related members. D. Fit exterior joints to exclude water. Cope at returns and miter at corners to produce tight-fitting joints, with full-surface contact throughout length of joint. Plane backs of casings to provide uniform thickness across joints, where necessary for alignment. E. Where face fastening is unavoidable, countersink fasteners, fill surface flush, and sand unless otherwise indicated. 3.5 ADJUSTING A. Replace exterior finish carpentry that is damaged or does not comply with requirements. Exterior finish carpentry may be repaired or refinished if work complies with requirements and shows no evidence of repair or refinishing. Adjust joinery for uniform appearance. THE KENT 06 20 13 - THE KENT Issue Date 05.09.18 EXTERIOR FINISH CARPENTRY THE KENT 3.6 CLEANING A. Clean exterior finish carpentry on exposed and semi-exposed surfaces. Touch up factory- applied finishes to restore damaged or soiled areas. 3.7 PROTECTION A. Protect installed products from damage from weather and other causes during construction. B. Remove and replace finish carpentry materials that are wet, moisture damaged, and mold damaged. 1. Indications that materials are wet or moisture damaged include, but are not limited to, discoloration, sagging, or irregular shape. 2. Indications that materials are mold damaged include, but are not limited to, fuzzy or splotchy surface contamination and discoloration. END OF SECTION 06 20 13