Specification:Storm windows and screens

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=GENERAL=

DESCRIPTION
 This specification provides guidance for the appropriate installation of metal screens and storm windows. This specification has been developed for use on historic properties (defined as any district, site, buildings, structure, or object that is listed in or eligible for listing in the National Register of Historic Places) and provides an overview of accepted practices. All work described herein and related work must conform to the Secretary of the Interior’s Standards for the Treatment of Historic Properties. The Contractor shall provide all labor, materials, equipment, and operations required to complete the rehabilitation work indicated herein. All work described herein and related work must have the approval of a Cultural Resources Manager, Conservator, Historic Architect, or other professional who meets the standards outlines in the Secretary of the Interior’s Standards – Professional Qualifications Standards pursuant to 36 CFR 61. Such person is referred to in this document as the Architect. The Architect will provide site-specific specifications, when appropriate. 

SECTION INCLUDES
 Furnish and Install Metal Screens and Storm Windows</li> </ol>

RELATED SECTIONS
<ol type="A"> Section 05010 – Historic Metals</li> Section 07900 – Sealants</li> Section 08500 – Metal Windows</li> Section 08510 – Metal Window Restoration</li> Section 08610 – Wood Windows</li> Section 08660 – Security Windows and Screens</li> Section 08800 – Glass and Glazing</li> </ol>

SUBMITTALS
<ol type="A"> Window Schedule: The Contractor shall submit a complete window schedule identifying all locations, rough opening dimensions, and sizes of storm windows that are to be installed.</li> Product Literature: The Contractor shall submit manufacturer’s product literature to the Architect for new screens and storm windows. Product literature shall include catalog cuts, specification data regarding materials and finishes, instructions for storage, handling, and installation.</li> Shop Drawings: The Contractor shall submit shop drawings for the new windows and screens that include elevations of units, full size sections, thicknesses and gages of metal, fastenings, methods of installations and anchorage, size and space of anchors, methods of glazing, locations of operating hardware, mullion and muntin details, method and material of weather-stripping, method of attaching screens, details of installation, and connections with other work. Shop drawings should serve as a cross-reference for visual compatibility of storm windows with existing windows, e.g. meeting rail alignment.</li> Samples: The Contractor submit a sample of the proposed storm windows and /or screens as specified for Architect’s approval of style, material, and finish. The Contractor will include finish color samples.</li> </ol>

QUALITY ASSURANCE
<ol type="A"> The Contractor shall have a minimum of seven (7) years experience in the installation of windows and screens, including historic building applications. The contractor shall also demonstrate a working knowledge of the Secretary of the Interior’s Standards for the Treatment of Historic Properties.</li> Warranty  Contractor shall provide, in writing, a five (5) year warranty on all materials and installation.</li> Furnish the window manufacturer's printed 10-year warranty for the work of this Section. The warranty shall include but not be limited to: infiltration, leakage, water penetration, glazing frame deflection or deformation, hardware, fasteners, weather-stripping, finish durability (surface crazing, peeling, discoloration, blistering, or powdering), and other defects which would impair the aesthetic or performance properties of the window.</li> </ol> </li> </ol>

MOCK-UPS
<ol type="A"> <li>The Contractor, at locations determined by the Architect, shall prepare mock-ups of the following work: <ol> <li>Installation of one storm window(s) and screen(s) of each type required, caulked with sealant and including all hardware.</li> </ol> </li> <li>More than one mock-up may be required to be acceptable for approval. The Contractor shall prepare at least three mock-ups of each type (moveable and fixed), if required by the Architect, without further compensation. Approved test panels shall become part of the work and shall serve as the quality standard for all similar work.</li> </ol>

DELIVERY, STORAGE AND HANDLING
<ol type="A"> <li>Deliver materials and proprietary products to the project site in manufacturer’s or distributor’s packaging, undamaged, complete with installation instructions.</li> <li>Deliver window units assembled in sturdy, protective crates or cartons. Store window units on edge. Mark crates or cartons with sufficient identification for proper window location.</li> <li>Store and handle windows in a manner that will not cause damage to the glass or finish.</li> </ol>

PROJECT / SITE CONDITIONS
<ol type="A"> <li>Do not undertake storm window installation until other exterior work including masonry restoration and cleaning, exterior wood repair, window repair or replacement, and painting have been completed. The Contractor shall coordinate work involving other trades so as not to delay the project schedule.</li> <li>The Contractor is responsible for protecting existing adjacent materials 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 of this Section. At a minimum, the Contractor shall: <ol> <li>Protect exterior wall surfaces, shutters, and window surrounds from damage during installation of screens and/or storm windows.</li> <li>Protect flashings and gutters, etc. when working on windows from the outside.</li> <li>Protect interior walls, trim, flooring, and hangings when installing interior mounted screens and/or storm windows.</li> </ol> </li> <li>The Contractor shall be responsible for disposal of waste materials and other debris associated with the work of this Section in accordance with local, state, and federal environmental regulations.</li> </ol> =PRODUCTS=

STORM WINDOW AND SCREEN INSTALLATION
<ol type="A"> <li>Materials <ol> <li>Interior Window Units: The fabrication of interior-mounted storm and/or screen windows may be necessary to maintain historical accuracy and/or to achieve other building specific requirements.. Contractor shall consult with supervising Architect to review scope of work and project-specific requirements prior to development of the window schedule. <li>Frames: Frames for interior-mounted storm and/or screen windows may be either wood or metal depending on the style and interior finish of the window openings. Where magnetic attached storm windows are to be use, frames may be either metal or a polymer. Where historic opening have circle tops or segmental arches, frames should match this feature.</li> <li>Mounting: Interior storm and/or screen windows  may be installed  in several ways depending upon operation requirements, historic significance of specific interior spaces, and physical constraints of the existing window opening and trim. Method of installation or mounting may include one or more of the following as determined by the Architect: <li>Permanent attachment of the entire storm window with screws or similar means of attachment that permits an otherwise fixed unit to be accessed occasionally for maintenance of the interior of the primary window.</li> <li>Use of operable clips with the storm window set into the window frame that permits removal for periodic cleaning or seasonal use for ventilation.</li> <li>Use of a magnetic attachment, requiring the permanent installation of magnetic tape around the interior of the window frame.</li> <li>Use of a horizontal sliding storm window with a track at the top and bottom in cases as when set behind, for example, two or more existing primary casement windows.</li> <li>Permanent attachment of the storm window frame with screws where there are removable panels (storms and screens) set into the storm window frame.</li> <li>Attachment of a casement storm window using hinges on one side to permit the unit to open into the room as when used behind, for example, an existing outward-swinging casement window. </ol> </li> <li>Glazing: Glazing to be determined by Architect and may include UV protection for interior furnishings if required..</li> </ol> </li> <li>Exterior Window Units: <li>The Architect will determine the type of exterior storm and/or screen window and may include one or more of the following: <li>aluminum triple track, combination storm and screen type;</li> <li>fixed wood or aluminum frame with interchangeable storm and screen panels that can be removed from the room side; </li> <li>single unit wood or aluminum storm window that is either designed to lift out or permanently mounted with provisions for occasional maintenance of primary window sash; </li> <li>wood screen including units that fill the whole window opening and those that are half screen; </li> <li>aluminum screen including units that fill the whole window opening and those that are half screens. Where historic opening have circle tops or segmental arches, frames should match this feature. All units to be factory glazed and complete with frame, sash, hardware, glass closures, and related components and accessories as specified. Storm sash and/or screen shall fit snugly within the existing window opening and without additional filler pieces. </li> </ol> <li>Aluminum Units <li>Frames shall be of extruded aluminum per ASTM B221. Aluminum alloy used for color coating shall be as required to produce specified color. Colors for sheet aluminum shall not deviate more than the color of the extrusion samples.</li> <li>Frames shall be butted and screwed construction, reinforced at the corners. There shall be an adjustable expander with weep holes on the sill to compensate for out of square openings. Provide weather-stripping approved by the Architect at the sill, head, and meeting rail. Where installation flanges are used, they shall be pre-punched.</li> <li>For units with glass and/or screen inserts, the manner of operation, construction, and installations to be approved by the Architect and will depend, in part, on the type of window units selected by the Architect.</li> <li>Screen inserts shall be of hollow extruded design with overlaps at sides of frame. Screen wire to be secured with a corrugated vinyl spline or other material approved by the Architect</li> <li>Color: Storm window and screen frame color shall match the color of the frames or sashes of the existing windows over which they will be installed.</li> <li>Units shall be designed to provide a rigid unit in place, to permit all sash to be removed from the inside, and to lock into the open and closed positions. Units that rattle when operated or when subjected to wind conditions are not acceptable.</li> <li>Sash dimensions for exterior storm window shall mirror those of the existing windows. Meeting rails and mullions shall align with those of the existing windows.</li> <li>Fasteners: Except as otherwise specified, screws, bolts, nuts, rivets, and other fastening devices incorporated in windows shall be of aluminum, stainless steel, or other non-corrosive material compatible with aluminum which will provide required strength at connections. Plated or coated materials (except for glazing clips) will not be acceptable.</li> <li>Where type, size or spacing of fastenings for securing window accessories or equipment to building construction is not shown or specified, use expansion or toggle bolts or screws, as best suited to construction material. Provide such bolts or screws minimum 6 mm (1/4 inch) in diameter.</li> <li>Expansion Bolts (Shields): Fed. Spec. A-A-55615, except lead, fiber, and plastic shields are not acceptable. Furnish bolts and screws required for mounting. </li> <li>Zinc-chromate Primer: Fed. Spec. TT-P-645.</li> </ol> </li> <li>Wood Units <li>Unit shall meet NWWDA Industry Standards for Wood Window Units I S 2 except as otherwise specified.</li> <li>Unit shall meet NWWDA Industry Standards I S 4, Water Repellent Preservative Treatment for Millwork.</li> <li>Wood specie to be approved by the Architect</li> <li>For units with glass and/or screen inserts, either wood or aluminum may be used for the insert frames, subject to approval by the Architect.</li> <li>For units with glass and/or screen inserts, the manner of operation, construction, and installation to be approved by the Architect and will depend, in part, on the type of window units selected by the Architect.</li> <li>Weep holes shall be provided at sill level. </li> <li>Fasteners to be approved by Architect.</li> <li>Finish shall match in color that of the window frame unless historic documentation for the building shows otherwise. Finish to be approved by Architect.</li> </ol> </li> </ol> </li> <li>Insect Screening: Fed. Spec. L-S-125, 18 x 18 aluminum, stainless steel, or bronze mesh. (if required to match historic screen installation). Screening to be approved by Architect. Solar screening may not be used.</li> <li>Sealant: See Section 07900 – Sealants.</li> </ol> </li> </ol>

=EXECUTION=

GENERAL
<ol type="A"> <li>Before specifying or fabricating storm and screen windows, measure each opening to determine its exact size. When installing storm windows or separate screen windows over historic windows, vertical and horizontal frame members, such as the meeting rail, shall  aligned. Storm window and screen frames shall not obscure details of the original windows beneath.</li> </ol>

STORM WINDOW AND/OR SCREEN WINDOW INSTALLATION
<ol type="A"> <li>Install storm windows and screen windows plumb, square, level, and in alignment and securely fastened to adjacent construction in accordance with window manufacturer's recommendations, unless other means are specified by the Architect.</li> <li>Where work involves only the installation of wood screen units, install screen units utilizing existing stops where present, unless otherwise specified by the Architect.</li> <li>After installation, adjust sash and hardware so as to operate silently and smoothly without  binding.</li> <li>Caulk joints between perimeter of interior face of storm window frames and adjoining construction with sealant, unless otherwise specified by Architect.</li> <li>Protect installed products until completion of project. Touch-up, repair, or replace damaged products before Substantial Completion.</li> <li>Clean interior and exterior metal surfaces of storm window. Wash all glass clean.</li> <li>Weep holes must be clean and cleared of any debris, caulk or paint.</li> </ol>

FINAL REPORT
<ol type="A"> <li>Contractor shall provide a final report including copies of approved submittals and photographs of the window work taken before, during, and after installation, and a written description of the executed work.</li> </ol>