SECTION 08 01 52 HISTORIC TREATMENT OF WINDOWS Copyright 2026 - 2026 ARCAT, Inc. - All rights reserved ** NOTE TO SPECIFIER ** Cooper Historical Windows; Wood Windows with Smart Technology. This section is based on the products of Cooper Historical Windows, which is located at: 75 Frontage Rd., Suite 101 North Stonington, CT 06359 Tel: 860-599-2481 Fax: 860-599-1071 Email: request info (info@TheCooperGroupCT.com) Web: https://www.thecoopergroupct.com [ https://arcat.com/company/cooper-historical-windows-51537 ] for additional information. Cooper Historical Windows specializes in fenestration preservation for sustainable building design. Our expertise encompasses historic wood, thermally broken steel, aluminum, and bronze window preservation, focusing on enhancing energy efficiency while maintaining the original historic glass aesthetic. We recognize that each window preservation project is inherently unique, requiring tailored interventions ranging from full restoration to complete replication, with nuanced hybrid approaches available. PART 1 GENERAL 1.1 SECTION INCLUDES ** NOTE TO SPECIFIER ** Select either preservation and installation paragraph or replication paragraph, or both, depending on Project requirements. Delete items below each paragraph not required for project. A. Historicpreservation, rehabilitation, restorationand reinstallation of the following items: ** NOTE TO SPECIFIER** Select items below to be included in scope of work 1. True divided lite wood windows. 2. True divided lite steel windows. 3. Reglazing. 4. Storm windows. 5. Screens. 6. Flashing and waterproofing of window assemblies. 7. Backer rods and joint sealants related to window assemblies. 8. Exterior brick molds. 9. Interior casing, and trim. 10. Window hardware. 11. Accessories. 12. Installation. ** NOTE TO SPECIFIER** Select one or both of the following paragraphs, depending on the scope of work. B. Historic reconstruction of existing wood windows with the following features: 1. True divided lite (TDL) windows. 2. Simulated divided lites. 3. Glazing. 4. Storm windows 5. Screens. 6. Flashing and waterproofing of window assemblies. 7. Backer rods and joint sealants related to window assemblies. 8. Exterior brick molds. 9. Interior casing and trim. 10. Window hardware. 11. Accessories. 12. Installation. C. Historic reconstruction of existing steel windows with the following features: 1. True divided lite (TDL) windows. 2. Simulated divided lites. 3. Glazing. 4. Storm windows 5. Screens. 6. Flashing and waterproofing of window assemblies. 7. Backer rods and joint sealants related to window assemblies. 8. Exterior brick molds. 9. Interior casing and trim. 10. Window hardware. 11. Accessories. 12. Installation. 1.2 RELATED SECTIONS ** NOTE TO SPECIFIER ** Delete any sections below not relevant to this project; add others as required. A. Section 01 30 00 - Administrative Requirements for submittal requirements. B. Section 01 53 91 - Special Procedures for Historic Treatment. C. Section 07 62 00 - Sheet Metal Flashing and Trim. D. Section 07 92 00 - Joint Sealants. E. Section 08 80 00 - Glazing for replacement glass. F. Section 09 90 00 - Painting and Coating. 1.3 REFERENCES ** NOTE TO SPECIFIER ** Delete references from the list below that are not actually required by the text of the edited section. A. Architectural Woodwork Institute (AWI): 1. AWI 0601-2024 Historic Restoration of Architectural Woodwork. B. ASTM International (ASTM): 1. ASTM D143-22 Standard Test Methods for Small Clear Specimens of Timber. C. American National Standards Institute (ANSI): 1. ANSI Z97.1: For Safety Glazing Materials Used in Buildings - Safety Performance Specifications and Methods of Test. (Latest edition). D. The Secretary of the Interior's Standards for the Treatment of Historic Properties with Guidelines for Preserving, Rehabilitating, Restoring & Reconstructing Historic Buildings, revised by Anne E. Grimmer (2017). E. Preservation Briefs 13: The Repair and Thermal Upgrading of Historic Steel Windows, Preservation Brief, by Sharon C. Park, AIA., U.S. Department of the Interior. National Park Service, Cultural Resources, Historic Preservation Services. 1.4 DEFINITIONS A. The following terminology is in accordance with The Secretary of the Interior's Standards for the Treatment of Historic Properties (36 CFR Part 68, 1995): 1. Preservation: The act or process of applying measures necessary to sustain the existing form, integrity, and materials, of an historic property. Work, including preliminary measures to protect and stabilize the property, generally focuses upon the ongoing maintenance and repair of historic materials and features rather than extensive replacement and new construction. The limited and sensitive upgrading of mechanical, electrical, and plumbing systems and other code-required work to make the properties functional is appropriate within a preservation project. However, new exterior additions are not within the scope of this treatment. 2. Rehabilitation: The act or process of making possible a compatible use for a property through repair, alterations, and additions while preserving those portions or features which convey its historical, cultural, or architectural values. 3. Restoration: The act or process of accurately depicting the form, features, and character of a property as it appeared at a particular period of time by means of the removal of features from other periods in its history and reconstruction of missing features form the restoration period. The limited and sensitive upgrading of mechanical, electrical, and plumbing system and other code-required work to make properties functional is appropriate within a restoration project. 4. Reconstruction: The act or process of depicting, by means of new construction, the form, features, and detailing of a non-surviving site, landscape, building, structure, or object for the purpose of replicating its appearance at a specific period of time and in its historic location. B. The term ' restoration' is used herein to refer to any of the processes of preservation, rehabilitation, restoration, or reconstruction. C. Application and extents of preservation, rehabilitation, restoration, or reconstruction of the existing work to be determined by the Architect and Owner. D. The following terminology is in accordance with AWI 0601-2024 Historic Restoration of Architectural Woodwork: 1. Surface Categories: a. Exposed: Surfaces normally visible after installation. b. Semi-Exposed: Surfaces that are generally neither visible nor accessible to the building occupants and/or general public but can be made visible or accessible by the movement of a component. c. Concealed: Surfaces not normally visible after installation. 1.5 SUBMITTALS A. Submit under provisions of Section 01 30 00. B. Product Data: 1. Manufacturer's data sheets on each product to be used. 2. Preparation instructions and recommendations. 3. Storage and handling requirements and recommendations. 4. Typical installation methods. ** NOTE TO SPECIFIER ** Select one or more of the treatment standards below, in accordance with the scope of work. C. Written Restoration Program: For each phase of preservation, rehabilitation, restoration, or reconstruction process, including protection of surrounding materials and site during operations. Describe in detail materials, methods, and equipment to be used for each phase of work. Include a schedule for sequencing of repairs. 1. Window Restoration Activity Sequence: Includes but not limited to the following methods: a. Protecting existing, adjacent historic materials that will not be impacted by the work of this Section. b. Accessing work without damage to historic materials (e.g. adjacent trim, moldings, finishes). c. Window sash removal. d. Protection of removed window sashes and transportation to shop. e. Removal of existing paint and glazing compound from sash by mechanical or chemical stripping. 1) Removal of paint from window surfaces requiring repair and as required to ensure proper closing and function of the window assemblies. f. Restoring existing frames, sash, and trim. g. Installing replacement materials. h. Reinstalling repaired windows. Indicate methods of final cleanup. 2. If alternate methods and materials to those indicated in this specification are proposed for any phase of restoration work, provide written description, including evidence of successful use on other comparable projects and program of testing to demonstrate effectiveness for use on this project. ** NOTE TO SPECIFIER ** Delete if not applicable to product type. D. Verification Samples: Two representative units of each type, size, pattern, and color. E. Shop Drawings: Project-specific drawings, drawn to scale. 1. Show location and extent of repair and replacement work, with enlarged details of parts indicating materials, profiles, joinery, reinforcing, method of splicing into or attaching to existing construction, accessory items, and finishes. Include field-verified dimensions. 1.6 QUALITY ASSURANCE A. Restoration Specialist Qualifications: Engage an experienced window restoration firm to perform the work of this Section. Firm shall have completed work similar in material, design, and extent to that indicated for this Project with a record of successful in-service performance. Experience installing standard windows is not sufficient experience for restoration work, Firm and work understanding of limitations and procedures related to work on historic structures is critical. 1. List 5 projects completed in the last five (5) years by Restoration Specialist that illustrates firm's expertise in all Work of this Section. B. Restoration Worker Qualifications: Persons who are experienced in restoration work of types required for this project. C. Source Limitations: Obtain primary repair materials from a single manufacturing source to ensure uniformity. Provide secondary materials as recommended by manufacturer of primary materials. ** NOTE TO SPECIFIER ** Revise sequencing and scope of mock-up depending on if the mockup will be done on site or in a shop. Example below is for on site mock-up. D. Mock-Ups: Completely restore and repair one of each type of window as prototypical examples of work to be performed. Complete all required work, leaving mock-ups ready for field painting. Mock-up to be prepared in sufficient time for Architect's review and to not delay construction progress. Locate mock-up as acceptable to Architect and provide temporary foundations and support. Architect will review each item below as it is completed prior to the Contractor moving to the next item to ensure quality control. Mock-up to be reviewed upon completion of all listed work items. Do not proceed with production work until mock-up is approved by Architect. 1. Repairs on mock-ups to include the following: a. Strip window of all coatings, caulking, and glazing putty as necessary for repair of damaged materials and as necessary for new coating system. It may be required to remove glazing to perform restoration work. If so, salvage and catalogue for reinstallation in original location and orientation. b. Remove, clean, and rehabilitate existing hinges and latching hardware. c. Clean all components as required by patching and paint coating system. d. Perform patch repairs. e. Perform Dutchman repairs on wood components based on approved Shop Drawings. f. Perform glazing putty installation. g. Prime window. h. Paint/stain window. i. Install rehabilitated hardware, new hardware, and/or new glazing as necessary. 2. The intent of a mock-up is to demonstrate quality of workmanship and visual appearance. 3. If the mock-up is not acceptable, rebuild the mock-up until satisfactory results are achieved. 4. Retain mock-up during construction as a standard for comparison with completed work. 5. Do not alter or remove mock-up until work is completed or removal is authorized. 1.7 PRE-INSTALLATION CONFERENCE A. Convene a conference approximately two (2) weeks before scheduled commencement of the Work. Attendees shall include Architect, Contractor and trades involved. Agenda shall include schedule, responsibilities, critical path items, and approvals. Review methods and procedures related to window restoration. 1.8 DELIVERY, STORAGE, AND HANDLING A. Store and handle in strict compliance with manufacturer's written instructions and recommendations. B. Protect from damage due to weather, excessive temperature, and construction operations. 1.9 PROJECT CONDITIONS A. Field Measurements: Field verify dimensions for any required replacement parts or repairs and to verify scope of work noted on the Drawings prior to starting work of this section. B. Historic restoration may occur in buildings with limited climate control. Manufacturer/supplier shall verify building conditions prior to restoration. When specified, requirements of AWI 0601-2024 are contingent up on maintaining proper interior environmental controls prior to, during, and after installation. Refer to AWI 200 - Care & Storage (latest edition). 1.10 WARRANTY A. Manufacturer's standard limited warranty unless indicated otherwise. PART 2 PRODUCTS 2.1 MANUFACTURERS A. Acceptable Manufacturer: Cooper Historical Windows, which is located at: 75 Frontage Rd., Suite 101 North Stonington, CT 06359 Tel: 860-599-2481 Fax: 860-599-1071 Email: request info (info@TheCooperGroupCT.com);Web: https://www.thecoopergroupct.com B. Substitutions: Not permitted. 2.2 PERFORMANCEAND DESIGNREQUIREMENTS A. Performance Requirements: 1. Restoration work to be compatible with the specified historical period or periods to be restored. 2. Assume a Lead Based Paint (LBP) protocol as required. Comply with all applicable regulations for lead-safe work practices, including handling, removal, and disposal of lead-based paint. 3. Each window is to be lockable. 4. Windows to operate smoothly with a maximum operating force of 10 lbs (4.5 kg), measured at the sash lift or operating handle. B. Design and Material Requirements. *** NOTE TO SPECIFIER *** Select wood or metal paragraph below, or both if appropriate. 1. Provide wood materials of the same species, and compatible for color and grain, and overall appearance of the historical period or periods to be restored and otherwise adhere to requirements set forth in AWI 300 - Materials Standard (latest edition). 2. Provide metal materials matching existing in thickness, profile, and composition. 3. Glass is to match existing or better, tempered as required; in compliance with ANSI Z97.1 (latest edition). 4. Plywood backing may be used in the fabrication of window frames provided any exposed profile and configuration is compatible with the historical period or periods to be restored. 5. Aesthetic requirements apply only to exposed and semi-exposed surfaces visible after installation. 6. Repair and restoration procedures are to achieve the following appearance standards: a. Finished surfaces (after final painting) are to have a uniform surface appearance as viewed from 5 feet (1.5 m) away, as determined by the Architect. b. Glass is to be clean and free of paint. c. Hardware is to be polished to a low luster. ** NOTE TO SPECIFIER ** Delete article if not required. 2.3 REPLACEMENT MATERIALS ** NOTE TO SPECIFIER ** Select Wood or Metal paragraph below, or both, as suitable to project. A. Wood: Wood for Interior or Exterior Components: Match existing or approved equal. B. Metal: Metal for Interior or Exterior Components: Match existing or approved equal. C. Glass: Match existing or better, tempered as required. ** NOTE TO SPECIFIER ** Delete glass options not required. Add additional necessary requirements. 1. Retain existing historic glass wherever feasible. Replace only glass that is broken, deteriorated, or non-compliant. 2. Glass: Uncoated clear float glass units according to Section 08 80 00 - "Glazing." 3. Safety Glass: Laminated glass or safety glazing film according to Section 08 80 00 - "Glazing." 4. Historically accurate glass: a. Monolithic glass units, manufactured in-house. b. Insulated glass units, manufactured in-house. 5. Stained glass and leaded glass. 6. Glazing compound: Sarco Dual Glaze elastic glazing compound by Abatron. 7. Glazing stops: To match existing original. 8. Glazing points: Triangle stainless steel glazier points by Fletcher, available at Aubuchon Hardware, Westminster, Massachusetts or approved equal. D. Hardware: Missing or irreparable hardware shall be replaced with new hardware. Match existing hardware where feasible. Where replacement is required, provide historically appropriate components, including the following acceptable models or approved equal: ** NOTE TO SPECIFIER ** Modify the following hardware components to match project requirements. 1. Handle-Type Sash Lifts: a. Model: LFD30 or LFD31, to match size of historic, as manufactured by Phelps Company, Battleboro, Vermont (802-257-4314). b. Finish: Oil Rubbed Bronze. 2. Sash Locks: a. Model: LFK18 as manufactured by Phelps Company, Battleboro, Vermont (802-257- 4314). b. Finish: Oil Rubbed Bronze. c. Confirm appropriate size for each sash type. 3. Secondary Sash Locks: a. Model: WSB75 as manufactured by Phelps Company. b. Finish: Oil Rubbed Bronze. 4. Lock: Match existing or Ives 07A10, finish TBD. 5. Pull: Match existing or Ives 026MB10B, finish TBD. E. Sash Counterweight Rope: Sampson "Red Spot" sash cord, braided cotton over nylon core. F. Sash Counterweights: Cast iron, weight as required to balance operating sash with new or added glass. G. Sash Pulleys: Replace original with like as required. 2.4 FINISHING MATERIALS FOR WOOD A. Water Resistant Glue: PVA, ANSI/HPVA Type 1 water resistant. B. Wood Filler: Abatron; WoodEpox. Two part, shrink free, adhesive wood filler compound or approved Substitution. Do not use polyester based products, C. Wood Repair: Abatron; LiquidWood. Two part, penetrating wood impregnator or approved Substitution. D. Wood Preservative: All new and exposed bare wood elements to be treated with preservative. Jasco Clear Wood Preservative by Jasco or approved equal. E. Wood Termite and Fungus Protection: Nisus Corporation; Bora-Care. F. Dutchman (infill) and trim repairs: All new elements to match original elements in wood species, quality, cut, grain direction, size, shape, surface finish, joinery, and profile. Wood patches of boat and/or diamond shape to be used so as to minimize those joint surfaces at 90 degrees to the member's grain direction. Original sash, frames, and sill may be western red cedar, white pine, or Douglas fir. All new wood elements are to be treated with preservative. G. Fasteners: Use metal fasteners that are noncorrosive and compatible with each material joined. Select material, type, size, and finish required for each use.. H. Weatherstripping: Provide weatherstripping by one of the following manufacturers, or approved equal: 1. Accurate Metal Weatherstrip Co, Inc., 800-536-6043; Color and material to match existing, Series No. 10Up (size as required) double hung sash. Provide all components as required by sash size and location or approved Substitution. 2. New interlocking weatherstripping at jambs, head, sill, and meeting rail, completely concealed when sash is closed, and designed for permanent resilient seal under bumper or wiper action as manufactured by Pemko Manufacturing Inc., Ventura, California (800-283-9988) or Advanced Repair Technology, Cherry Valley, New York (607-264-9040). I. The final two coats of finish paint to be field painted under 09 90 00. J. Window Sash Lubricant: ** NOTE TO SPECIFIER ** Delete lubricant options not required. 1. Apply bees wax to lubricate track for lower sash. 2. Clear penetrating sealer for Sash Tracks: TWP 500, Clear Total Wood Preservative, as manufactured by Gemini Coatings, Inc., 2300 Holloway Drive, El Reno, Oklahoma 73036 (800-262-5710); or approved equal. 3. Wax for Sash Tracks: Microcrystalline wax, such as Renaissance Wax/Polish as available at Dennis Blaine - Cutlery Specialties, Stuart, Florida (800-229-5530) or Wood Finish Supply, http://www.woodfinishsupply.com/RenWax.html, or approved equal. K. Sealant: Joint fillers and other related materials at window frame perimeters that are compatible with one another and with joint substrates and finishes under conditions of service and application, as demonstrated by sealant manufacturer based on testing and field experience. Use non-sag sealants for all other areas except as shown or specified. 2.5 FINISHING MATERIALS FOR METAL A. Patching Compound: Epoxy fillers with high content of steel fibers; plumber's epoxy or autobody patching compound, putty grade such as Devcon "Plastic Steel A" or equal. B. Welded Patches: Infill metal matching existing; weld in patches using steel rods and oxy-acetylene torch or arc welder. C. Dry Grit Blasting: Fine grit No. 15 at 80-100 psi. D. Fasteners: Use metal fasteners that are noncorrosive and compatible with each material joined. Select material, type, size, and finish required for each use.. E. Primers: Anti-corrosive, zinc-rich primer. F. Lubricant: Non-greasy lubricant containing anti-corrosive agent intended for use on metal. G. Weatherstripping: *** NOTE TO SPECIFIER*** Select the appropriate type of weather stripping per project requirements 1. Spring Metal: Bronze, brass or stainless steel with an integral friction-fit clip. Apply after finishing windows. 2. Vinyl Strips: V-shaped vinyl weatherstripping glued or adhered to finished window. 3. Foam Tape: Closed cell foam tape with adhesive backing or without backing for gluing to window frame. 4. Sealant Bead: Low-modulus (firm setting) caulk or silicone sealant and bond breaker tape. H. The final two coats of finish paint to be compatible with zinc-rich primer, and field painted under 09 90 00. I. Sealant: Joint fillers and other related materials at window frame perimeters that are compatible with one another and with joint substrates and finishes under conditions of service and application, as demonstrated by sealant manufacturer based on testing and field experience. Use non-sag sealants for all other areas except as shown or specified. PART 3 EXECUTION 3.1 EXAMINATION A. Do not begin installation until the substrates have been properly constructed and prepared. B. If substrate preparation is the responsibility of another installer, notify Architect in writing of unsatisfactory preparation before proceeding. C. Do not install interior Work until Restoration Specialist's recommended environmental conditions are met. 3.2 PREPARATION A. Clean surfaces thoroughly prior to installation. B. Prepare surfaces using the methods recommended by the manufacturer for achieving the best result for the substrate under the project conditions. C. Protection: 1. Erect temporary protective covers over walkways and at points of pedestrian entrance and exit that must remain in service during course of exterior restoration work. 2. Protect adjacent surfaces that may be damaged during restoration work. *** NOTE TO SPECIFIER*** Include the following two sentences for metal window restoration. 3. Shield adjacent masonry and glass with temporary covering of cardboard or fiberboard held in place with heavy-duty strapping tape or wood bracing. 4. Enclose dry grit blasting work areas with temporary scaffolding or framework sufficient to support tarpaulin enclosure to prevent escape of abrasive. 3.3 INSTALLATION A. Install in accordance with Restorer's instructions, approved submittals, and in proper relationship with adjacent construction. B. Scope of Restoration Work for Wood Windows is as Follows: 1. Remove sash and panels. 2. Catalog parts as required for their return to their original opening. 3. Strip windows of paint, putty, and glass; salvage glass to be reused in openings. a. Remove paint from surfaces requiring repair and as required to ensure proper closing and function of the window assemblies. b. Remove paint and coatings as required to permit proper operation, repair, and adhesion of new finishes. Where full removal is necessary, strip to bare wood. 4. Sash: Components to be repaired, restored, and reproduced as needed through dutchman, reinforcing, and component replacement. a. Replace sash if it cannot be restored. 5. Frame Components (jamb, sill, weight pocket, sash stops, brickmolds): To be restored in place or reproduced as needed through dutchman, reinforcing, and component replacement. 6. For Deteriorated Wood: At frames, sash, sill, or trim. a. Cut out areas of deteriorated wood back to solid, sound material. 1) If more than 30 percent of the members are determined to be deteriorated, replace entire member with new material conforming to project standards. 7. Deteriorated Sash Cords and Pulleys: Replace as required by window condition. a. Weights: Replace as required for windows to function properly. Reinstall salvaged sash weights at original locations unless missing or requiring otherwise. Adjust as necessary for proper weighting and operation of all window sash. 8. Install Window Opening Control Device. 9. Sand Surfaces and profiles smooth, removing raised grain and all weathered wood. a. Kerf operable sash and apply perimeter weatherstripping. 10. Ensure that wood is sufficiently dry prior to any application of finish. 11. Back prime and prime each piece of frame, sash, sill, and trim prior to installation. Mil thickness to be as recommended by the manufacturer. Sash tracks shall not be painted. a. Sash Tracks: Brush apply one coat - clear, penetrating sealant to coat sash tracks. Submit to Architect for approval. Finish with application of microcrystalline wax to allow sash to move freely. 12. Glazing: Install into cleaned and primed wood surfaces. a. Apply a thin setting bead of glazing compound to muntin/sash surface, press in glazing. b. Install glazing points, minimum of two points of each side of glass pane, approximately 2 inches (51 mm) away from the corners. Install every 8 inch (203 mm) in field. c. Roll out a rope of glazing compound, approximately 3/8 inch (9.5 mm) in diameter. 1) Press into glass around the entire perimeter. 2) Finish compound with a long, smooth stroke over surface. 3) Scrape off excess compound. 4) The dimension of glazing compound to be consistent throughout project. 5) Allow glazing compound to skin and cure in accordance with manufacturer's recommendations prior to painting. 6) Paint glazing compound concurrently with painting of sash. 7) All surfaces of glazing compound to be thoroughly coated with paint. 8) Paint to be lapped at least 1/16 inch (1.6 mm) onto glazing to provide a seal between glazing surface and glazing compound. 13. Mask sash and finish paint. Assume opaque paint for interior and exterior surfaces. a. Apply two coats of finish paint to all sash, sill, and exterior frame elements. Apply one coat of paint to the interior wood frame and sill elements. Colors to be as scheduled. 14. Reinstall sash into original, cataloged, openings. 15. Clean, and polish existing sash hardware. Install new matching hardware where needed. Install glide pads to reduce friction. 16. Hardware: a. Hardware to be reinstalled in original locations. Coordinate salvaged and restored hardware to complete missing sets per room/window. b. Remove paint. c. Rehabilitate and reinstall original historic hardware wherever feasible. Replace only components that are missing, damaged beyond repair, or non-functional. d. Replace missing/damaged original historic elements and all non-historic hardware with new components. e. Replace pin springs with new stainless steel springs, size and type as required for proper operation. 17. Fastener Replacement: Remove existing fasteners where corroded. Install new fasteners and countersink. Fill void over fastener with wood fill, sand smooth, finish to match. 18. Dutchman Repair: a. Remove paint/stain from area of Dutchman repair. b. Use a saw to remove the decayed area and cut back to sound wood. Use an angle cut to shed water. c. Cut wood infill patch to fill void. The seam between the wood and the repair should be 1/32 inch (0.8 mm), or less. d. Apply adhesive in accordance with manufacturer's instructions. e. Apply adhesive to infill patch and surfaces of voids and insert patch. All joints shall be tight with only hairline glue lines. The infill patch shall extend a minimum of 1/16 inch (1.6 mm) above surface of repaired member. f. After adhesive has cured, carve, or sand the entire area smooth to match profile and texture of adjoining surfaces. Transitions and irregularities between wood and epoxy should not be visible after sanding. Prepare surface, prime and paint. 19. Sealant: a. Install sealant per specification section 07 92 00 - Joint Sealants at the completion of repair activities. Areas to receive sealant include: 1) Perimeter joint between exterior casing proud of siding and adjacent siding. 2) All joints at sill and siding. 20. Large Voids: a. Repair of Decayed Wood and Filling of Cracks: 1) Remove all paint and other coatings from area to be repaired. 2) Treat decayed fibers with fungicide. 3) Treat bare and sanded wood thoroughly with wood consolidant per manufacturer's directions. For larger or profiled repairs, acrylic strips matching the shape of the wood can be placed on the member to assist in modeling the compound. 4) Fill the repair area completely with wood filler, making the surface even and smooth. Transitions and irregularities between wood and epoxy shall not be visible after sanding. 5) Remove sanding dust thoroughly. C. Scope of Restoration Work for Steel Windows is as Follows: 1. Restore windows in place in so far as possible. 2. If metal sections are bent, warped, or excessively damaged, remove the windows to the shop for more extensive repairs. a. Sections beyond superficial cosmetic repairs to be cut and replaced with matching sections and welded in place, leaving no evidence of the weld marks. b. Utilize sections from salvaged windows, preferably from the same building, if possible. c. While windows are in shop for repairs, inspect the subframes and masonry surrounds left in place for needed repairs. 3. When removing windows for shop repairs, number each window and catalog parts as required for their return to their original opening. Salvage glass to be reused in openings. 4. Employ proper precautionary measures against the spread and inhalation of toxic dust and silica particles, in accordance with local regulations. 5. Remove light rust, flaking and excessive paint from sashes and frames. a. Remove rust by manual or mechanical abrasion or the application of chemicals. Burning off rust with torches or welding guns is strictly prohibited. b. Acceptable means of manual and mechanical removal are wire brush, aluminum oxide sandpaper, or power tools fitted with a wire brush or rotary whip attachment. c. Acceptable means of chemical removal are commercially prepared anti-corrosive liquid or gel acid compounds. Hydrochloric acid is not recommended. d. Remove chemical residue using damp cloths and immediately dry surfaces. Do not use running water for rinsing. 6. Remove loose, flaking, and excessive paint by manual or mechanical abrasion, or the application of chemicals. 7. Well-bonded paint should be left in place as long as it does not prevent proper functioning of the window. a. Feather edges of paint by sanding to provide a good surface for repainting. 8. Clean bare metal with denatured alcohol and dry immediately. 9. Immediately prime exposed metal with two coats of rust-inhibiting primer, in accordance with manufacturer's recommendations. 10. Patch small holes and uneven areas with patching compound and sand smooth to eliminate pockets. 11. Replace cracked or broken glass and glazing compound. a. Retain all clips, glazing beads, and other fasteners that hold the glass to the sash and only replace with new components as necessary. b. Use only glazing compound formulated for metal windows. 12. Replace missing screws or fasteners with salvaged parts, in so far as possible. 13. Clean and lubricate hinges with a non-greasy lubricant specially formulated for metals and containing an anti-corrosive agent. 14. Repaint steel sections with two coats of finish paint compatible with primer. Paint to be lapped at least 1/16 inch (1.6 mm) onto glazing to provide a seal between glazing surface and glazing compound. 15. Install weatherstripping as necessary. 16. Caulk the masonry surrounds. 3.4 FIELD QUALITY CONTROL A. Field Inspection: Coordinate field inspection in accordance with appropriate sections in Division 01. ** NOTE TO SPECIFIER ** Include if manufacturer provides field quality control with onsite personnel for instruction or supervision of product installation, application, erection, or construction. Delete if not required. B. Manufacturer's Services: Coordinate manufacturer's services in accordance with appropriate sections in Division 01. 3.5 CLEANING AND PROTECTION A. Clean both sides of glazing at completion of work, in accordance with the manufacturer's recommendations. B. Remove and legally dispose of all materials, tools, equipment, and debris generated from work of this section. C. Touch-up, repair or replace damaged products before Substantial Completion. END OF SECTION