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HomeMy WebLinkAbout07 71 00 Roof SpecialtiesTHE KENT 07 71 00 - THE KENT Issue Date 05.09.18 ROOF SPECIALTIES THE KENT SECTION 07 71 00 - ROOF SPECIALTIES 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. Copings. 2. Roof-edge flashings. 3. Roof-edge drainage systems. 4. Reglets and counter flashings. B. Related Sections: 1. Division 06 Section "Rough Carpentry" for wood nailers, curbs, and blocking. 2. Division 07 Section "Sheet Metal Flashing and Trim" for custom- and site-fabricated sheet metal flashing and trim. 3. Division 07 Section "Manufactured Roof Expansion Joints" for manufactured roof expansion-joint cover assemblies. 4. Division 07 Section "Roof Accessories" for set-on-type curbs, equipment supports, roof hatches, vents, and other manufactured roof accessory units. 5. Division 07 Section "Joint Sealants" for field-applied sealants between roof specialties and adjacent materials. 6. Division 07 Section "Expansion Control" for manufactured sheet metal expansion-joint covers. 1.3 PERFORMANCE REQUIREMENTS A. General Performance: Roof specialties shall withstand exposure to weather and resist thermally induced movement without failure, rattling, leaking, or fastener disengagement due to defective manufacture, fabrication, installation, or other defects in construction. B. FM Approvals' Listing: Manufacture and install copings, roof-edge flashings that are listed in FM Approvals' "RoofNav" and approved for windstorm classification, Class 1-120. Identify materials with FM Approvals' markings. C. Thermal Movements: Allow for thermal movements from ambient and surface temperature changes to prevent buckling, opening of joints, hole elongation, overstressing of components, failure of joint sealants, failure of connections, and other detrimental effects. Provide clips that resist rotation and avoid shear stress because of thermal movements. Base calculations on surface temperatures of materials due to both solar heat gain and nighttime-sky heat loss. 1. Temperature Change (Range): 120 deg F, ambient; 180 deg F, material surfaces. THE KENT 07 71 00 - THE KENT Issue Date 05.09.18 ROOF SPECIALTIES THE KENT 1.4 ACTION SUBMITTALS A. Product Data: For each type of product indicated. Include construction details, material descriptions, dimensions of individual components and profiles, and finishes. B. Shop Drawings: For roof specialties. Include plans, elevations, expansion-joint locations, keyed details, and attachments to other work. Distinguish between plant- and field-assembled work. Include the following: 1. Details for expansion and contraction; locations of expansion joints, including direction of expansion and contraction. 2. Pattern of seams and layout of fasteners, cleats, clips, and other attachments. 3. Details of termination points and assemblies, including fixed points. 4. Details of special conditions. C. Samples for Initial Selection: For each type of roof specialty indicated with factory-applied color finishes. D. Samples for Verification: For copings, roof-edge flashings, roof-edge drainage systems, reglets and counter-flashings made from 12-inch lengths of full-size components including fasteners, cover joints, accessories, and attachments. 1.5 INFORMATIONAL SUBMITTALS A. Product Test Reports: Based on evaluation of comprehensive tests performed by a qualified testing agency, for copings and roof-edge flashings. B. Warranty: Sample of special warranty. 1.6 CLOSEOUT SUBMITTALS A. Maintenance Data: For roofing specialties to include in maintenance manuals. 1.7 QUALITY ASSURANCE A. Mockups: Build mockups to verify selections made under sample submittals and to demonstrate aesthetic effects and set quality standards for fabrication and installation. 1. Build mockup of typical roof edge, including fascia, gutter and downspout, approximately 4 feet long, including supporting construction, seams, attachments, underlayment, and accessories. 2. Approval of mockups does not constitute approval of deviations from the Contract Documents contained in mockups unless Architect specifically approves such deviations in writing. 3. Approved mockups may become part of the completed Work if undisturbed at time of Substantial Completion. B. Pre-installation Conference: Conduct conference at Project site. 1. Meet with Owner, Architect, Owner's insurer if applicable, Installer, and installers whose work interfaces with or affects roof specialties including installers of roofing materials and accessories. THE KENT 07 71 00 - THE KENT Issue Date 05.09.18 ROOF SPECIALTIES THE KENT 2. Examine substrate conditions for compliance with requirements, including flatness and attachment to structural members. 3. Review special roof details, roof drainage, and condition of other construction that will affect roof specialties. 1.8 DELIVERY, STORAGE, AND HANDLING A. Do not store roof specialties in contact with other materials that might cause staining, denting or other surface damage. Store roof specialties away from uncured concrete and masonry. B. Protect strippable protective covering on roof specialties from exposure to sunlight and high humidity, except to extent necessary for the period of roof specialties installation. 1.9 WARRANTY A. Special Warranty on Painted Finishes: Manufacturer's standard form in which manufacturer agrees to repair finish or replace roof specialties that show evidence of deterioration of factory- applied finishes within specified warranty period. 1. Fluoropolymer Finish: Deterioration includes, but is not limited to, the following: a. Color fading more than 5 Hunter units when tested according to ASTM D 2244. b. Chalking more than a No. 8 rating when tested according to ASTM D 4214. c. Cracking, checking, peeling, or failure of paint to adhere to bare metal. 2. Finish Warranty Period: 20 years from date of Substantial Completion. PART 2 - PRODUCTS 2.1 EXPOSED METALS A. Aluminum Sheet: ASTM B 209, alloy as standard with manufacturer for finish required, with temper to suit forming operations and performance required. 1. Surface: Smooth, flat finish. 2. Mill Finish: As manufactured. 3. Exposed Coil-Coated Finishes: Prepare, pretreat, and apply coating to exposed metal surfaces to comply with coating and resin manufacturers' written instructions. a. Two-Coat Fluoropolymer: AAMA 620. System consisting of primer and fluoropolymer color topcoat containing not less than 70 percent PVDF resin by weight. b. Concealed Surface: Pretreat with manufacturer's standard white or light-colored acrylic or polyester backer finish, consisting of prime coat and wash coat with a minimum total dry film thickness of 0.5 mil. B. Aluminum Extrusions: ASTM B 221, alloy and temper recommended by manufacturer for type of use and finish indicated, finished as follows: 1. Exposed High-Performance Organic Finish: Prepare, pretreat, and apply coating to exposed metal surfaces to comply with coating and resin manufacturers' written instructions. a. Two-Coat Fluoropolymer: AAMA 2604. System consisting of primer and fluoropolymer color topcoat containing not less than 70 percent PVDF resin by weight. THE KENT 07 71 00 - THE KENT Issue Date 05.09.18 ROOF SPECIALTIES THE KENT C. Stainless-Steel Sheet: ASTM A 240 or ASTM A 666, Type 304. 2.2 CONCEALED METALS A. Aluminum Sheet: ASTM B 209, alloy and temper recommended by manufacturer for type of use and structural performance indicated, mill finished. B. Aluminum Extrusions: ASTM B 221, alloy and temper recommended by manufacturer for type of use and structural performance indicated, mill finished. C. Stainless-Steel Sheet: ASTM A 240 or ASTM A 666, Type 304. 2.3 UNDERLAYMENT MATERIALS A. Self-Adhering, High-Temperature Sheet: Minimum 30 to 40 mils thick, consisting of slip- resisting polyethylene-film top surface laminated to layer of butyl or SBS-modified asphalt adhesive, with release-paper backing; cold applied. Provide primer when recommended by underlayment manufacturer. 1. Thermal Stability: ASTM D 1970; stable after testing at 240 deg F. 2. Low-Temperature Flexibility: ASTM D 1970; passes after testing at minus 20 deg F. 3. Products: Subject to compliance with requirements, provide one of the following: a. Carlisle Coatings & Waterproofing; CCW WIP 300HT. b. Grace Construction Products, a unit of W. R. Grace & Co.; Ultra. c. Henry Company; Blueskin PE200 HT. d. Metal-Fab Manufacturing, LLC; MetShield. e. Owens Corning; WeatherLock Metal High Temperature Underlayment. B. Polyethylene Sheet: 6-mil- thick polyethylene sheet complying with ASTM D 4397. 2.4 MISCELLANEOUS MATERIALS A. General: Provide materials and types of fasteners, protective coatings, sealants, and other miscellaneous items required by manufacturer for a complete installation. B. Fasteners: Manufacturer's recommended fasteners, suitable for application and designed to meet performance requirements. Furnish the following unless otherwise indicated: 1. Exposed Penetrating Fasteners: Gasketed screws with hex washer heads matching color of sheet metal. 2. Fasteners for Aluminum: Aluminum or Series 300 stainless steel. 3. Fasteners for Stainless-Steel Sheet: Series 300 stainless steel. C. Elastomeric Sealant: ASTM C 920, elastomeric polyurethane polymer sealant of type, grade, class, and use classifications required by roofing-specialty manufacturer for each application. D. Bituminous Coating: Cold-applied asphalt emulsion complying with ASTM D 1187. E. Asphalt Roofing Cement: ASTM D 4586, asbestos free, of consistency required for application. THE KENT 07 71 00 - THE KENT Issue Date 05.09.18 ROOF SPECIALTIES THE KENT 2.5 COPINGS A. Copings: Manufactured coping system consisting of formed-metal coping cap in section lengths not exceeding 12 feet, concealed anchorage; corner units, end cap units, and concealed splice plates with same finish as coping caps. 1. Manufacturers: Subject to compliance with requirements, provide products by one of the following: a. ATAS International, Inc. b. Castle Metal Products. c. Cheney Flashing Company. d. Hickman Company, W. P. e. Johns Manville. f. Merchant & Evans, Inc. g. Metal-Era, Inc. h. Metal-Fab Manufacturing, LLC. i. MM Systems Corporation. j. Petersen Aluminum Corporation. 2. Coping-Cap Material: Formed or extruded aluminum, thickness as required to meet performance requirements. a. Finish: Two-coat fluoropolymer. b. Color: As selected by Architect from manufacturer's full range. 3. Coping-Cap Material: Zinc-coated steel, nominal 0.028-inch thickness. a. Finish: Two-coat fluoropolymer. b. Color: As selected by Architect from manufacturer's full range. 4. Corners: Factory or field mitered and mechanically clinched and sealed watertight. 5. Coping-Cap Attachment Method: Snap-on, fabricated from coping-cap material. 6. Snap-on-Coping Anchor Plates: Concealed, galvanized-steel sheet, 12 inches wide, with integral cleats. 7. Face Leg Cleats: Concealed, continuous galvanized-steel sheet. 2.6 ROOF-EDGE FLASHINGS A. Canted Roof-Edge Fascia and Gravel Stop: Manufactured, two-piece, roof-edge fascia consisting of snap-on metal fascia cover in section lengths not exceeding 12 feet and a continuous formed galvanized-steel sheet cant, 0.028-inch-thick, minimum, with extended vertical leg terminating in a drip-edge cleat. Provide matching corner units. 1. Manufacturers: Subject to compliance with requirements, provide products by one of the following: a. ATAS International, Inc. b. Castle Metal Products. c. Cheney Flashing Company. d. Hickman Company, W. P. e. Johns Manville. f. Merchant & Evans, Inc. g. Metal-Era, Inc. h. Metal-Fab Manufacturing, LLC. i. MM Systems Corporation. j. National Sheet Metal Systems, Inc. k. Petersen Aluminum Corporation. 2. Fascia Cover: Fabricated from the following exposed metal: a. Formed Aluminum: 0.040 inch thick. b. Extruded Aluminum: 0.080 inch thick. THE KENT 07 71 00 - THE KENT Issue Date 05.09.18 ROOF SPECIALTIES THE KENT 3. Corners: Factory mitered and mechanically clinched and sealed watertight. 4. Splice Plates: Concealed, of same material, finish, and shape as fascia cover. 5. Fascia Accessories: Fascia extenders with continuous hold-down cleats Wall cap Soffit trim. B. Roof-Edge Fascia: Manufactured, two-piece, roof-edge fascia consisting of snap-on metal fascia cover in section lengths not exceeding 12 feet and a continuous formed- or extruded- aluminum anchor bar with integral drip-edge cleat to engage fascia cover. Provide matching corner units. 1. Manufacturers: Subject to compliance with requirements, provide products by one of the following: a. Hickman Company, W. P. b. Johns Manville. c. Metal-Era, Inc. d. Metal-Fab Manufacturing, LLC. e. National Sheet Metal Systems, Inc. 2. Fascia Cover: Fabricated from the following exposed metal: a. Formed Aluminum: 0.032 inch thick. 3. Corners: Factory mitered and mechanically clinched and sealed watertight. 4. Splice Plates: Concealed, of same material, finish, and shape as fascia cover. 5. Fascia Accessories: Fascia extenders with continuous hold-down cleats Wall cap Soffit trim. C. One-Piece Gravel Stops: Manufactured, one-piece, metal gravel stop in section lengths not exceeding 12 feet, with a horizontal flange and vertical leg fascia terminating in a drip edge, and concealed splice plates of same material, finish, and shape as gravel stop. Provide matching corner units. 1. Manufacturers: Subject to compliance with requirements, provide products by one of the following: a. Architectural Products Company. b. Castle Metal Products. c. Cheney Flashing Company. d. Hickman Company, W. P. e. Metal-Era, Inc. f. Metal-Fab Manufacturing, LLC. g. MM Systems Corporation. h. Petersen Aluminum Corporation. 2. Fabricate from the following exposed metal: a. Formed Aluminum: 0.032 inch thick. b. Extruded Aluminum: 0.080 inch thick. 3. Corners: Factory mitered and mechanically clinched and sealed watertight. D. One-Piece Vented Drip Edge: Manufactured, one-piece, aluminum vented drip edge in section lengths not exceeding 10 feet, with sloped 6-1/2-inch edge, 2- inch horizontal flange and fascia wrap with 9 sq. inches of net free vent are per lineal foot. 1. Manufacturer: Air Vent Inc., 4117 Pinnacle Point Drive, Suite 400, Dallas, TX 75211, ph.: 1.800.247.8368. a. Product: Pro Flow Vented Drip Edge. E. Aluminum Finish: Two-coat fluoropolymer. 1. Color: As selected by Architect from manufacturer's full range. F. Zinc-Coated Steel Finish: Two-coat fluoropolymer. 1. Color: As selected by Architect from manufacturer's full range. THE KENT 07 71 00 - THE KENT Issue Date 05.09.18 ROOF SPECIALTIES THE KENT 2.7 ROOF-EDGE DRAINAGE SYSTEMS A. Manufacturers: Subject to compliance with requirements, provide products by one of the following: 1. ATAS International, Inc. 2. Castle Metal Products. 3. Cheney Flashing Company. 4. CopperCraft by FABRAL; a Euramax company. 5. Hickman Company, W. P. 6. Merchant & Evans, Inc. 7. Metal-Era, Inc. 8. Metal-Fab Manufacturing, LLC. 9. MM Systems Corporation. B. Gutters: Manufactured in uniform section lengths not exceeding 12 feet, with matching corner units, ends, outlet tubes, and other accessories. Elevate back edge at least 1 inch above front edge. Furnish flat-stock gutter straps, gutter brackets, expansion joints, and expansion-joint covers fabricated from same metal as gutters. 1. Fabricate from the following exposed metal: a. Formed Aluminum: 0.032 inch thick. 2. Gutter Profile: As shown on Drawings and according to SMACNA's "Architectural Sheet Metal Manual." 3. Corners: Factory mitered and mechanically clinched and sealed watertight. 4. Gutter Supports: Manufacturer's standard supports as selected by Architect with finish matching the gutters. C. Downspouts: Plain rectangular complete with machine-crimped elbows, manufactured from the following exposed metal. Furnish with metal hangers, from same material as downspouts, and anchors. 1. Formed Aluminum: 0.032 inch thick. D. Splash Pans: Fabricate from the following exposed metal: 1. Formed Aluminum: 0.040 inch thick. E. Copper Finish: Non-patinated, mill. F. Aluminum Finish: Two-coat Fluoro-polymer. 1. Color: As selected by Architect from manufacturer's full range. 2.8 REGLETS AND COUNTERFLASHINGS A. Manufacturers: Subject to compliance with requirements, provide products by one of the following: 1. Castle Metal Products. 2. Cheney Flashing Company. 3. Fry Reglet Corporation. 4. Heckmann Building Products Inc. 5. Hickman Company, W. P. 6. Keystone Flashing Company, Inc. 7. Metal-Era, Inc. 8. Metal-Fab Manufacturing, LLC. 9. MM Systems Corporation. THE KENT 07 71 00 - THE KENT Issue Date 05.09.18 ROOF SPECIALTIES THE KENT B. Reglets: Manufactured units formed to provide secure interlocking of separate reglet and counterflashing pieces, from the following exposed metal: 1. Stainless Steel: 0.019 inch thick. 2. Corners: Factory mitered and mechanically clinched and sealed watertight. 3. Surface-Mounted Type: Provide reglets with slotted holes for fastening to substrate, with neoprene or other suitable weatherproofing washers, and with channel for sealant at top edge. 4. Stucco Type, Embedded: Provide reglets with upturned fastening flange and extension leg of length to match thickness of applied finish materials. 5. Masonry Type, Embedded: Provide reglets with offset top flange for embedment in masonry mortar joint. 6. Multiuse Type, Embedded: For multiuse embedment in masonry mortar joints. C. Counter-flashings: Manufactured units of heights to overlap top edges of base flashings by 4 inches and in lengths not exceeding 12 feet designed to snap into reglets or through-wall- flashing receiver and compress against base flashings with joints lapped, from the following exposed metal: 1. Formed Aluminum: 0.024 inch thick. D. Accessories: 1. Flexible-Flashing Retainer: Provide resilient plastic or rubber accessory to secure flexible flashing in reglet where clearance does not permit use of standard metal counterflashing or where reglet is provided separate from metal counterflashing. E. Aluminum Finish: Two-coat Fluoro-polymer. 1. Color: As selected by Architect from manufacturer's full range. F. Stainless-Steel Finish: No. 4 (bright, polished directional satin). 2.9 GENERAL FINISH REQUIREMENTS A. Comply with NAAMM's "Metal Finishes Manual for Architectural and Metal Products" for recommendations for applying and designating finishes. B. Protect mechanical and painted finishes on exposed surfaces from damage by applying a strippable, temporary protective covering before shipping. C. Appearance of Finished Work: Noticeable variations in same piece are not acceptable. Variations in appearance of adjoining components are acceptable if they are within the range of approved Samples and are assembled or installed to minimize contrast. PART 3 - EXECUTION 3.1 EXAMINATION A. Examine substrates, areas, and conditions, with Installer present, to verify actual locations, dimensions, and other conditions affecting performance of the Work. B. Examine walls, roof edges, and parapets for suitable conditions for roof specialties. THE KENT 07 71 00 - THE KENT Issue Date 05.09.18 ROOF SPECIALTIES THE KENT C. Verify that substrate is sound, dry, smooth, clean, sloped for drainage, and securely anchored. D. Proceed with installation only after unsatisfactory conditions have been corrected. 3.2 UNDERLAYMENT INSTALLATION A. Self-Adhering Sheet Underlayment: Install wrinkle free. Apply primer if required by underlayment manufacturer. Comply with temperature restrictions of underlayment manufacturer for installation; use primer rather than nails for installing underlayment at low temperatures. Apply in shingle fashion to shed water. Overlap edges not less than 3-1/2 inches. Roll laps with roller. Cover underlayment within 14 days. B. Polyethylene Sheet: Install with adhesive for temporary anchorage to minimize use of mechanical fasteners under roof specialties. Apply in shingle fashion to shed water, with lapped and taped joints of not less than 2 inches. 3.3 INSTALLATION, GENERAL A. General: Install roof specialties according to manufacturer's written instructions. Anchor roof specialties securely in place, with provisions for thermal and structural movement. Use fasteners, solder, protective coatings, separators, sealants, and other miscellaneous items as required to complete roof-specialty systems. 1. Install roof specialties level, plumb, true to line and elevation; with limited oil-canning and without warping, jogs in alignment, buckling, or tool marks. 2. Provide uniform, neat seams with minimum exposure of solder and sealant. 3. Install roof specialties to fit substrates and to result in watertight performance. Verify shapes and dimensions of surfaces to be covered before manufacture. 4. Torch cutting of roof specialties is not permitted. 5. Do not use graphite pencils to mark metal surfaces. B. Metal Protection: Protect metals against galvanic action by separating dissimilar metals from contact with each other or with corrosive substrates by painting contact surfaces with bituminous coating or by other permanent separation as recommended by manufacturer. 1. Coat concealed side of uncoated aluminum roof specialties with bituminous coating where in contact with wood, ferrous metal, or cementitious construction. 2. Underlayment: Where installing metal flashing directly on cementitious or wood substrates, install a course of self-adhering, high-temperature sheet underlayment. 3. Bed flanges in thick coat of asphalt roofing cement where required by manufacturers of roof specialties for waterproof performance. C. Expansion Provisions: Allow for thermal expansion of exposed roof specialties. 1. Space movement joints at a maximum of 12 feet with no joints within 18 inches of corners or intersections unless otherwise shown on Drawings. 2. When ambient temperature at time of installation is between 40 and 70 deg F, set joint members for 50 percent movement each way. Adjust setting proportionately for installation at higher ambient temperatures. D. Fastener Sizes: Use fasteners of sizes that will penetrate substrate not less than recommended by fastener manufacturer to achieve maximum pull-out resistance. E. Seal joints with elastomeric sealant as required by roofing-specialty manufacturer. THE KENT 07 71 00 - THE KENT Issue Date 05.09.18 ROOF SPECIALTIES THE KENT F. Seal joints as required for watertight construction. Place sealant to be completely concealed in joint. Do not install sealants at temperatures below 40 deg F. 3.4 COPING INSTALLATION A. Install cleats, anchor plates, and other anchoring and attachment accessories and devices with concealed fasteners. B. Anchor copings to meet performance requirements. 1. Interlock face and back leg drip edges of snap-on coping cap into cleated anchor plates anchored to substrate at manufacturer's required spacing that meets performance requirements. 2. Interlock face leg drip edge into continuous cleat anchored to substrate at manufacturer's required spacing that meets performance requirements. Anchor back leg of coping with screw fasteners and elastomeric washers at manufacturer's required spacing that meets performance requirements. 3.5 ROOF-EDGE FLASHING INSTALLATION A. Install cleats, cants, and other anchoring and attachment accessories and devices with concealed fasteners. B. Anchor roof edgings with manufacturer's required devices, fasteners, and fastener spacing to meet performance requirements. 3.6 ROOF-EDGE DRAINAGE-SYSTEM INSTALLATION A. General: Install components to produce a complete roof-edge drainage system according to manufacturer's written instructions. Coordinate installation of roof perimeter flashing with installation of roof-edge drainage system. B. Gutters: Join and seal gutter lengths. Allow for thermal expansion. Attach gutters to firmly anchored gutter supports spaced not more than 24 inches apart. Attach ends with rivets and seal with sealant to make watertight. Slope to downspouts. 1. Install gutter with expansion joints at locations indicated but not exceeding [50 feet] apart. Install expansion joint caps. C. Downspouts: Join sections with manufacturer's standard telescoping joints. Provide hangers with fasteners designed to hold downspouts securely to walls and 1 inch away from walls; locate fasteners at top and bottom and at approximately 60 inches o.c. 1. Provide elbows at base of downspout to direct water away from building. 2. Connect downspouts to underground drainage system indicated. D. Splash Pans: Install where downspouts discharge on low-slope roofs. Set in elastomeric sealant. THE KENT 07 71 00 - THE KENT Issue Date 05.09.18 ROOF SPECIALTIES THE KENT 3.7 REGLET AND COUNTER-FLASHING INSTALLATION A. General: Coordinate installation of reglets and counter-flashings with installation of base flashings. B. Embedded Reglets: See Division 04 Section "Unit Masonry" for installation of reglets. C. Surface-Mounted Reglets: Install reglets to receive flashings where flashing without embedded reglets is indicated on Drawings. Install at height so that inserted counter-flashings overlap 4 inches over top edge of base flashings. D. Counter-flashings: Insert counter-flashings into reglets or other indicated receivers; ensure that counter-flashings overlap 4 inches over top edge of base flashings. Lap counterflashing joints a minimum of 4 inches and bed with elastomeric sealant. Fit counter-flashings tightly to base flashings. 3.8 CLEANING AND PROTECTION A. Clean exposed metal surfaces of substances that interfere with uniform oxidation and weathering. B. Clean off excess sealants. C. Remove temporary protective coverings and strippable films as roof specialties are installed. On completion of installation, clean finished surfaces including removing unused fasteners, metal filings, pop rivet stems, and pieces of flashing. Maintain roof specialties in a clean condition during construction. D. Replace roof specialties that have been damaged or that cannot be successfully repaired by finish touchup or similar minor repair procedures. END OF SECTION 07 71 00