ADDENDUM. ADDENDUM # 1 DATE: February 12, 2018

Transcription

1 ADDENDUM ADDENDUM # 1 DATE: February 12, 2018 REFERENCE: Invitation for Bid No.: S-LB IFB Issue Date: January 25, 2018 Title: Stonewall Middle School Addition and Renovations Architect/Engineer: Architecture Incorporated. Sealed Bid Due Date: February 22, 2:00 p.m. THE FOLLOWING CHANGES, ADDITIONS, DELETIONS AND CLARIFICATIONS ARE HEREBY MADE PART OF THE BIDDING REQUIREMENTS AND CONTRACT DOCUMENTS FOR THE ABOVE REFERENCED PROJECT AND SHALL BE TAKEN INTO ACCOUNT IN THE PREPARATION OF ALL BIDS AND THE EXECUTION OF ALL WORK. BIDDERS SHALL ACKNOWLEDGE RECEIPT OF THIS ADDENDUM IN THE APPROPRIATE SPACE ON THE BID FORM. A. Specifications: 1. Section : Add 2.11, A, 1, c. Aminoplast Foam Insulation by CfiFOAM, Inc. 2. Section : Retrofit Metal Roof Modifications and Repairs, add entire section. 3. Section : Metal Wall Panels, add entire section. 4. Section : Heat-Welded SBS-Modified Bituminous Membrane Roofing, add entire section. 5. Section : Flashing and Sheet Metal, add entire section. 6. Section : Roofing Accessories, add entire section. 7. Section : Add 2.2, A, 4. ESSI Acoustical Products Co., ESSI Silentspace Acoustical Wall Panels, 8. Section , 2.1, A, Add Aarco Products, Inc. 9. Section : Delete paragraph 1.03, B. 10. Section : Add 2.01, G. Seating Concepts, LLC, San Diego, CA ( Helix. 11. Section : Revise paragraph 2.03, D to reference (#4 Pedestal). END OF ADDENDUM #1 PURCHASING OFFICE P.O. BOX 389, MANASSAS, VA , FAX

2 SECTION RETROFIT METAL ROOF MODIFICATIONS AND REPAIRS PART 1 - GENERAL 1.1 RELATED DOCUMENTS A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 1 Specification Sections, apply to this Section. 1.2 SUMMARY A. This work involves modifications of the existing sloped metal roof system supported by a retrofit roof framing system over existing built-up roofing. B. Extent of metal roof system modifications as indicated on drawings and by provisions of this section. C. Work may also include preparation of new penetrations (including flashing) through existing metal roof system and existing built up roofing. 1.3 SUBMITTALS A. Product Data: Submit manufacturer s product information, specifications, and installation instructions for building components and accessories insulation. 1. If a listed product is not required for the completion of the project, submit a letter stating that the product is not required. If it is determined later in the project that the product is required for completion of the project, a submittal will be required prior to installation of product. B. Submittal Procedure: 1. The Engineer will compare the information submitted to the information and design concept expressed in the contract documents. 2. Pre-Job Submittal Format: (choose one) a. Submit five (5) complete sets of Pre-Job Submittals to Engineer for review. Bind Pre-Job Submittals in a three-ring binder with tabbed dividers keyed to items required under Part 2 of this Section. The Work may not proceed until the complete Pre-Job Submittal package has been approved by Owner. b. Submit one complete set on PMWeb. Upload submittals in PDF file format. At the beginning of the PDF file, there must be a title cover page listing all sections submitted on. For each section, begin with a transmittal page that states the content for that section. Additionally, the cover page must have hyperlinks to each sections transmittal page. Flow and order must the follow the specification layout format. The Work may not proceed until the complete Pre-Job Submittal package has been approved by Owner. 3. Update submittals to Engineer by either providing five (5) hard copies for binders or upload as PDF file(s) in PMWeb. This must be completed on a weekly basis to account for all new materials used on the Project. 4. Utilize Submittal Log (provided by Owner) for organization, numbering, and reference. 5. Submittal items shall each be labeled with the corresponding section of the Project Manual that required the submittal. 6. When material is resubmitted for any reason, provide a new letter of transmittal. 2/1/2018 RETROFIT METAL ROOF MODIFICATIONS AND REPAIRS

3 7. On resubmittals, cite the original submittal number for reference or add a suffix such as -A, -B (2-A, 2-B, etc.). 8. One approved Shop Drawing and sample (including data sheets, instruction sheets, etc.) if required, shall be kept at the job site. 9. Accompany each submittal package with a letter of transmittal showing all information required for identification and checking, including, but not limited to: 10. Project title, Engineer, Owner, Contractor or Subcontractor. 11. Consecutive numbering system. 12. Date drawn and dates revised. 13. Contractor's certification that shop drawings have been checked by Contractor for compliance with contract requirements. 14. Working dimensions. 15. Arrangements (orientation). 16. Where contents of submitted literature from manufacturers include data not pertinent to the submittal, clearly show which portions of the contents are being submitted for review. C. Submit manufacturer approved details of the modifications to the existing metal roofing system. D. Installer Certification: Submit manufacturer s certification stating the metal roof system installer has been regularly engaged in the installation of the pre-engineered metal roof system specified. The company must be currently listed at the time of Bid as an Approved Contractor by the appropriate Warranty Program of the metal roofing system manufacturer. There must be no deviations made without the prior written approval of the Engineer and metal roofing system manufacturer. 1.4 QUALITY ASSURANCE A. Contractor Qualifications: This roofing system must be installed by a company specializing in metal roof application. The contractor shall have a minimum of five (5) years experience with, and a minimum of twenty (20) warranted installations with the roof manufacturer s products specified for this project. The company must be currently listed at the time of Bid as an Approved Contractor by the appropriate Warranty Program of the roof manufacturer. There must be no deviations made without the prior written approval of the Engineer and roof manufacturer. B. Manufacturer: Architectural Metal Systems, 1150 States Dock Road, Eufaula AL C. Phone: D. Pre-Roofing Conference: Prior to installation of roofing system modifications, meet at project site with Installer (Roofer), and Owner s representatives. Tour representative areas of roofing, and discuss substrate conditions. Review requirements of contract documents, submittals, status of coordinating work, availability of materials and installation facilities, proposed installation schedule, requirements for inspections and testing or certifications, forecasted weather conditions, governing regulations, insurance requirements, and proposed installation procedures. 1.5 DELIVERY, STORAGE, AND HANDLING A. General: Deliver and store prefabricated components, sheets, panels, and other manufactured items so they will not be damaged or deformed. Stack materials on platforms or pallets, cover with tarpaulins or other suitable watertight ventilated covering. Store metal sheets or panels so 2/1/2018 RETROFIT METAL ROOF MODIFICATIONS AND REPAIRS

4 that water accumulations will drain freely. Do not store sheets or panels in contact with other materials that might cause staining. B. Store temperature sensitive materials in original undamaged containers in a clean, dry, protected location and within temperature range required by manufacturer. C. Protect strippable protective covering on metal roof panels from exposure to sunlight and high humidity, except to extent necessary for period of metal roof panel installation. D. Protect batt insulation as follows: 1. Do not expose to sunlight, except to extent necessary for period of installation and concealment. 2. Protect against ignition at all times. Do not deliver insulation materials to Project site before installation time. 3. Complete installation and concealment of insulating materials as rapidly as possible in each area of construction. E. At a minimum, materials are to be covered/protected by reinforced tarpaulins. F. Roof Loading: Do no store materials on roof decks, nor position roofing installation equipment on roof decks, in concentrations exceeding design live loading. All materials will have to be stored in trailers or other weatherproof housings until required to be installed on the roof. G. Do not use cranes to hoist materials onto the roof when the building is occupied. 1.6 PROJECT CONDITIONS A. Weather Limitations: Proceed with installation only when existing and forecasted weather conditions permit assembly of metal roof panels to be performed according to manufacturers written instructions and warranty requirements. 1.7 INSPECTIONS AND JOB CONTROL A. At the completion of the work arrange for inspection of the modifications and repairs by the Building Owner s Roofing Representative to assure compliance with specifications. If discrepancies are found in the Work, the contractor shall make all corrections at no additional cost to the Owner. 1.8 WARRANTY A. Provide two-year Contractor's Warranty for materials and workmanship. PART 2 - PRODUCTS 2.1 METAL ROOF PRODUCTS A. Metal Framing: Cold-formed steel shall be minimum 16 gauge galvanized structural steel shapes, minimum yield strength of 50,000 psi, in accordance with applicable ASTM standard. Framing components shall be coated with red oxide paint or equivalent by either a spray or dip process. B. Standing-Seam Metal Roof Panels: Provide factory-formed metal roof panels designed to be field assembled by lapping and interconnecting raised side edges of adjacent panels with joint type indicated and mechanically attaching panels to supports using concealed clips in side laps. Provide factory installed, high grade, hot-melt elastomeric sealant, within the confines of female 2/1/2018 RETROFIT METAL ROOF MODIFICATIONS AND REPAIRS

5 seam flange, on bottom edge of female seam flange, designed to seal against adjacent male panel leg. Include clips, cleats, pressure plates, and accessories required for weather tight installation. 1. Only standing seam metal roof panels that are fabricated in industry-accredited facilities will be considered. Standing seam metal roof panels that are considered to be a factoryformed product through a comprehensive network of authorized independent manufacturers shall be considered unacceptable for installations. 2. The roof panel seams shall positively interlock the panels and clips as they are installed. The roof panel seams shall be designed to be mechanically locked with an electrical seaming tool to assure structural integrity of panel-to-panel and panel-to-clip connections. The roof panels shall be capable of being seamed without the addition of a batten or an additional seam covering device. 3. The roof clip shall be of concealed sliding design to allow for expansion and contraction of the roof panel and allow the roof to move independently of the underlying structural members. The roof clip shall support the panel flat one-inch above the structure to provide space for insulation spacer block between the roof panel and structural system. The roof clips shall not deviate in alignment from ridge to eave so as to prevent the roof panels from functioning properly during expansion and contraction. The roof clips shall be of a sliding design that is attached to the roof panel so that thermal movement in the roof panels will occur at the clip. 4. Roof panels shall be of maximum length allowed by law to be transported on the highway to minimize or eliminate panel end laps and swege plates. C. Steel Roof Panel Systems: Comply with ASTM E Vertical-Rib, Seamed-Joint, Standing-Seam Metal Roof Panels: Formed with vertical ribs at panel edges and intermediate stiffening ribs symmetrically spaced between ribs; designed for sequential installation by mechanically attaching panels to supports using concealed clips located under one side of panels and engaging opposite edge of adjacent panels, and mechanically seaming panels together. a. Material: Aluminum-zinc alloy-coated steel sheet, inch (24 ga.) nominal thickness. 1) Exterior Finish: Fluoropolymer Two-Coat System. 2) Color: As selected by Architect from manufacturer s full range. b. Surface: Striated, flat finish. c. Panel Coverage: 16 inches. d. Panel Height: Must match existing. D. All Panel Materials: 1. Metallic-Coated Steel Sheet Pre-painted with Coil Coating: Steel sheet metallic coated by the hot-dip process and pre-painted by the coil-coating process to comply with ASTM A 755. a. Aluminum-Zinc Alloy-Coated ( Galvalume ) Steel Sheet: ASTM A 792, Class AZ50 coating designation, Grade 40; structural quality. b. Surface: Striated, flat finish. c. Exposed Finishes: Apply the following coil coating. 1) High-Performance Organic Finish: Prepare, pretreat, and apply coating to exposed metal surfaces to comply with coating and resin manufacturers written instructions. 2/1/2018 RETROFIT METAL ROOF MODIFICATIONS AND REPAIRS

6 a) Fluoropolymer Two-Coat System: Manufacturer s standard two-coat, thermo-cured system consisting of specially formulated inhibitive primer and fluoropolymer color topcoat containing minimum 70 percent polyvinylidene fluoride resin by weight; complying with physical properties and coating performance requirements of AAMA 2605, except as modified with humidity resistance: 1500 hours and salt spray resistance: 1000 hours. d. Concealed Finish: Apply pretreatment and manufacturer s standard white or lightcolored acrylic or polyester backer finish, consisting of prime coat and wash coat with a minimum total dry film thickness of 0.5 mil. E. Steel Wall Panel Systems: 1. General: Provide factory-formed, prefinished, lappable exposed fastener, structural ribbed metal roof/wall panel system that has been pretested and certified by manufacturer to comply with specified requirements under installed conditions. 2. Wall panels shall match existing wall panels when installed. 3. Structural Requirements: Engineer panels for structural properties in accordance with latest edition of American Iron and Steel Institute's Cold Formed Steel Design Manual using effective width concept and Aluminum Associations Aluminum Design Manual. 4. Forming: Use continuous end rolling method. No end laps on panels. No portable rollforming machines will be permitted on this project, no installer-owned or installer-rented machines will be permitted. It is the intent of the Architect to provide Factory- Manufactured panel systems only for this project. 5. Panels shall be directly fastened to the substrate. 6. The panel shall have an overlapping sidelap feature. 2.2 ACCESSORIES A. Roof Panel Accessories: Provide components required for a complete metal roof panel assembly including trim, copings, fasciae, corner units, ridge closures, clips, flashings, sealants, gaskets, fillers, closure strips, and similar items. Match material and finish of metal roof panels, unless otherwise indicated. 1. Closures: Provide closures at eaves and ridges. 2. Clips: Provide clips of concealed sliding design attached to the roof panel to allow for expansion and contraction movement of the roof pan in either direction. a. Material: inch- nominal thickness, zinc-coated (galvanized) or aluminumzinc alloy-coated steel sheet. 3. Cleats: Cleats formed from minimum inch- (22 ga.) thick, zinc-coated (galvanized) steel. 4. Backing Plates: Provide metal backing plates at flashing end splices, fabricated from material recommended by manufacturer. 5. Closure Strips: Closed-cell, expanded, cellular, rubber or cross-linked, polyolefin-foam or closed-cell laminated polyethylene; minimum 1-inch- thick, flexible closure strips; cut or pre-molded to match metal roof panel profile. Provide closure strips where indicated or necessary to ensure weather tight construction.. B. Flashing and Trim: Formed from0.028-inch (24 gage) thick, zinc-coated (galvanized) steel sheet or aluminum-zinc alloy-coated steel sheet prepainted with coil coating. Provide flashing and trim as required to seal against weather and to provide finished appearance. Locations 2/1/2018 RETROFIT METAL ROOF MODIFICATIONS AND REPAIRS

7 include, but are not limited to, eaves, rakes, corners, bases, framed openings, ridges, fasciae, and fillers. Finish flashing and trim with same finish system as adjacent metal roof panels. 1. One-Piece Counter flashing (Secured in Saw-cut Reglet): Provide one-piece counterflashing of break-formed metal. Form counter flashing piece with a back-break top flange/sealant channel, hemmed drip edge and continuous break to maintain spring pressure against base flashing when in place. Provide polyurethane based sealant for exposed application and butyl base sealant for non-exposed applications. 2. Ridge Cap: Provide fabricated ridge cap, including terminations. 3. Expansion Joints: Install as necessary to allow building movement and/or as detailed on drawings. 4. Ridge Vents: Provide fabricated ridge vents, including terminations for applications indicated. Provide uniform ventilation path through screen of regular perforation pattern in vertical leg. Provide corrugated polyethylene equal to Cor-A-Vent V-600 Series; thickness to suit vent height if required by roofing manufacturer. 5. Fascia Cladding: Provide break-formed trim profiles for eave and rake cladding of lumber roof edge construction C. Gutters and downspouts are specified in Division 7 Section Flashing and Sheet Metal. D. Panel Touch-up Paint: Air-dry Touch-up Kynar 500 PVDF Resin based paint by a coil coating applicator. E. Panel Sealants: 1. Sealant Tape: Pressure-sensitive, 100 percent solids, gray polyisobutylene compound sealant tape with release-paper backing. Provide permanently elastic, non-sag, nontoxic, non-staining tape 1 inch wide and 1/8 inch thick. 2. Concealed Butyl-Rubber-Based, Solvent-Release Sealant: ASTM C Exposed Joint Sealant: ASTM C 920; elastomeric polyurethane or polysulfide, sealant; of type, grade, class, and use classifications required to seal joints in metal roof panels and remain weather tight; recommended in writing by metal roof panel manufacturer. a. For exposed sealant applications, provide color to match primary material at sealant line. F. Fasteners: Fasteners shall be of adequate material and strength to resist deterioration. Selftapping screws, bolts, nuts, self-locking rivets and bolts, end-welded studs, and other suitable fasteners designed to withstand design loads. Provide exposed fasteners with heads matching color of metal roof panels by means of factory-applied coating. 1. Metal framing to metal framing: minimum ¼-14, self-drilling, self-tapping screws coated with a corrosion-resistant coating such as Stalguard or Climaseal. Fasteners must be acceptable to the roof system manufacturer. 2. Exposed Fasteners for Roof Panels and Trim : Self-drilling or self-tapping 410 stainless steel hex washer head pre-painted to match roof panel color. Fastener and washer must be one piece and have an EPDM or neoprene washer under head of fasteners bearing on weather side of metal roof panels. 3. Blind Fasteners: High-strength stainless-steel rivets shall be only be used in areas approved by the Owner. 4. Concealed Fasteners for Flashing and Trim a. Stainless Steel self-drilling screws with hex washer head. 2/1/2018 RETROFIT METAL ROOF MODIFICATIONS AND REPAIRS

8 b. Metal to wood: no. 10 Stainless steel wood screws. Minimum embedment shall be 1 ½ inches. Provide EPDM washer with exposed fasteners. Pre-painted to match sheet metal. Fastener spacing: maximum 8 inches o.c. unless otherwise noted on drawings. 5. Metal Framing to Existing Structure: The fasteners used to attach the substructure components to the existing roof structure shall be AISI 1021 cold rolled steel, case hardened to HRC 45 minimum and shall be coated with Stalguard or Climaseal and acceptable to penetrate the existing roof structure. Concrete expansion anchor fasteners shall be hot-dipped galvanized or stainless steel as recommended by the roof system manufacturer. Fasteners must be acceptable to the roof system manufacturer and have fastener pull-out data incorporated into the structural calculations and shop drawings. G. Penetration Flashings: Roof pipe and conduit penetrations shall move with the roof, resist deterioration and be watertight. Pipe penetration flashings shall be EPDM with stainless steel clamps and allow for movement resulting from thermal expansion. Roof penetrations shall be secured under the roof to prevent movement. Install Deck-Tite or similar pipe flashings so that one half inch of flexible flashing material is vertical against the pipe penetration. Install sealant and a stainless steel band around the top of the pipe flashing. Pipe penetrations shall be centered through panel. H. Batt Insulation: Un-faced batt insulation in accordance with ASTM C665, Type 1 and ASTM E136, 6 inch minimum thickness per layer. Maximum flame spread of 10 and smoke developed rating of 10 in accordance with ASTM E84. Thickness of insulation shall be as required to provide a total system thermal rating of R-20. I. Roof curbs: minimum inch-thick aluminum. Curbs shall be fabricated with curb and flange design for use with standing seam metal roof systems. Curbs shall have integral water diverters located on the upslope face of the curb. J. Thermal spacer blocks: Polystyrene boards, 2.2 pounds per cubic foot minimum density, 40 psi minimum compressive strength. Thermal spacer blocks shall be approved by roofing system manufacturer, and located between each sub-structure member and the standing seam roof. Securely fasten spacer blocks. K. Provide other fasteners, sealants, trim and accessories necessary, but not specifically listed, for complete and proper installation of the work. L. Bituminous Coating: Cold-applied asphalt mastic (15mil min. thickness) or high temperature ice and water shield (40mil min. thickness). Provide inert-type non-corrosive compound free of asbestos fibers, sulfur components, and other deleterious impurities. 2.3 FABRICATION A. General: Fabricate and finish metal roof panels, flashings and accessories at the factory to greatest extent possible, by manufacturer s standard procedures and processes, as necessary to fulfill indicated performance requirements demonstrated by laboratory testing. Comply with indicated profiles and with dimensional and structural requirements. B. Provide panel profile, including major ribs and intermediate stiffening ribs, if any, for full length of panel. C. Fabricate metal roof panel joints with factory-installed captive gaskets or separator strips that provide a weather-tight seal and prevent metal-to-metal contact, in a manner that will minimize noise from movements within panel assembly. 2/1/2018 RETROFIT METAL ROOF MODIFICATIONS AND REPAIRS

9 D. Sheet Metal Accessories: Fabricate flashing and trim to comply with recommendations from SMACNA and NRCA that apply to the design, attachment, dimensions, metal, and other characteristics of item indicated. 1. Form exposed sheet metal accessories that are without excessive oil canning, buckling, and tool marks and that are true to line and levels indicated, with exposed edges folded back to form hems. 2. Sealed Joints: Form non-expansion but movable joints in metal to accommodate butyl based non-curing sealants to comply with SMACNA and NRCA standards. 3. Conceal fasteners and expansion provisions where possible. Exposed fasteners are not allowed on faces of accessories exposed to view. 4. Fabricate cleats and attachment devices of size and metal thickness recommended by SMACNA, NRCA, or by metal roof panel manufacturer for application, but not less than one gage thicker than thickness of metal being secured. 2.5 FINISHES, GENERAL 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: Variations in appearance of abutting or adjacent pieces are acceptable if they are within one-half of the range of approved Samples. Noticeable variations in the same piece are not acceptable. Variations in appearance of other components are acceptable if they are within the range of approved Samples and are assembled or installed to minimize contrast. 2.6 MANUFACTURER APPROVAL OF PRODUCTS A. Contractor shall use sub framing, clips, sealant, fasteners, mastics, roof curbs, roof jacks, flashing or flashing materials provided by the standing seam metal roof system manufacturer. Materials not supplied by the standing seam roof system manufacturer, must be approved by the standing seam roof system manufacturer to confirm that the materials are approved for use with the system. PART 3 - EXECUTION 3.1 INSTALLATION A. Standing seam metal roof system shall be modified and repaired in accordance with the Manufacturer s instructions and approved shop drawings. Use only skilled roofers completely familiar with the products and Manufacturer s current recommended methods of installation. B. Modifications and repairs of the standing seam metal roofing system shall be in accordance to the Project Manual, the Architectural Drawings, the Manufacturers requirements and the recommendations set forth by the Sheet Metal and Air Conditioning Contractors National Association (SMACNA): Architectural Sheet Metal Manual, Latest Edition and the National Roofing Contractors Association (NRCA): Architectural Sheet Metal and Metal Roofing Manual, Latest Edition. C. Additional requirements and more stringent requirements of this Project Manual will supersede Manufacturer s instruction where applicable. Comply with industry standards except when 2/1/2018 RETROFIT METAL ROOF MODIFICATIONS AND REPAIRS

10 more restrictive tolerances or specified requirements indicate more rigid standards or more precise workmanship. D. Install new structural framing system and attach through the roof deck to the structural members. A minimum of two screws per base clip are required. Install new framing system as follows: 1. Structural framing perpendicular or parallel to the new slope and spaced 5'-0" or less on center: New purlins shall be installed perpendicular to the slope and directly above the structural framing at a maximum spacing of 5'-0". New purlins shall be supported by metal studs. Studs shall be fastened through base clips to the structural framing at six feet on center maximum. 2. Structural framing perpendicular or parallel to the new slope and spaced more than 5'-0" on center: Install base clips directly on and perpendicular to the structural framing. New purlins shall be installed perpendicular to the slope. New purlins shall be supported at a maximum spacing of 5'-0" on center by metal studs. Studs shall be spaced at six feet on center maximum. 3. If more stringent support requirements are specified by the manufacturer of the approved structural metal roof system, such requirements shall govern. E. Install one layer of batt insulation over the surface of the roof deck once installation of the roof and wall panels has been completed. Prior to installation of insulation, clean all debris from the roof deck. Insulation shall be dry and free of loose debris. The insulation shall be in addition to any insulation in purlins required by manufacturer. Installation of thermal spacer blocks shall be required. 1. Insulation that has been exposed to moisture and become wet as determined by a Delmhorst moisture meter shall be removed and replaced with dry insulation. Do not allow stored insulation to become wet. Remove wet stored insulation from the site. Insulation must be stored in a watertight container or structure such as a storage trailer. 3.2 EXAMINATION A. Examine substrates, areas, and conditions, with Installer present, for compliance with requirements for installation tolerances, metal roof panel supports, and other conditions affecting performance of work. B. Examine structural metal roof deck to verify that installation is within flatness tolerances required by metal roof panel manufacturer. C. Examine roughing-in for components and systems penetrating metal roof panels to verify actual locations of penetrations relative to seam locations of metal roof panels before metal roof panel installation. D. Proceed with installation only after unsatisfactory conditions have been corrected. 3.3 PREPARATION A. Clean substrates of substances harmful to insulation, including removing projections capable of interfering with insulation attachment. B. Install flashings and other sheet metal to comply with requirements specified in Division 7 Section Flashing and Sheet Metal. 3.4 WEATHER CONDITIONS 2/1/2018 RETROFIT METAL ROOF MODIFICATIONS AND REPAIRS

11 A. Weather Condition Limitations: Proceed with roofing work only when existing and forecasted weather conditions will permit work to be performed in accordance with manufactures recommendations and warranty requirements. B. Follow roofing membrane manufacturer and NRCA guidelines for inclement weather or when air temperature may fall below 40 degrees Fahrenheit. Do not apply roofing membrane to damp, wet, or frozen deck substrate. 3.5 METAL ROOF PANEL INSTALLATION A. Provide metal roof panels of full length from eave to ridge unless otherwise indicated or restricted by shipping limitations. B. Thermal Movement. Rigidly fasten metal roof panels to structure at one and only one location for each panel. Allow remainder of panel to move freely for thermal expansion and contraction. Predrill panels for fasteners as necessary for thermal expansion and contraction. 1. Point of Fixity: Rigidly fasten the end of metal roof panels as recommended by the roof panel manufacturer to allow for thermal expansion and contraction. 2. Avoid attaching accessories through roof panels in a manner that will inhibit thermal movement. C. Standing-Seam Metal Roof Panels: Fasten metal roof panels with concealed clips at each standing-seam joint, at location, spacing, and with fasteners recommended by manufacturer to conform to specification requirements. 1. Field cutting of metal panels by torch or saw is not permitted. 2. Install clips to supports with self-tapping fasteners. 3. Locate and space fastenings in uniform vertical and horizontal alignment. 4. Crimp standing seams with manufacturer-approved motorized electric seam tool so clip, metal roof panel, and factory-applied sealant are completely engaged. 5. Provide metal closures, flash and seal metal roof panels with weather closures at eaves, rakes, hips, and perimeter of all openings. 6. Install ridge and hip caps as metal roof panel work proceeds. 7. Install metal flashing to allow moisture to run over and off metal roof panels. D. Metal Protection: Where dissimilar metals will contact each other or corrosive substrates, protect against galvanic action by painting contact surfaces with bituminous coating, by applying self-adhering rubberized-asphalt underlayment to each contact surface, or by other permanent separation as recommended by metal roof panel manufacturer. E. Joint Sealers: Install gaskets, joint fillers, and sealants where indicated and where required for weatherproof performance of metal roof panel assemblies. Provide types of gaskets, fillers, and sealants indicated or, if not indicated, types recommended by metal roof panel manufacturer. 1. Seal metal roof panel end laps with double beads of tape or sealant, full width of panel. Seal side joints as recommended by metal roof panel manufacturer. 2. Prepare joints and apply sealants to comply with requirements in Part 2 of this section. 3.6 ACCESSORY INSTALLATION A. General: Install accessories with positive anchorage to building and weather tight mounting and provide for thermal expansion. Coordinate installation with flashings and other components. 1. Install components required for a complete metal roof panel assembly including trim, ridge closures, seam covers, flashings, sealants, fillers, closure strips, and similar items. 2/1/2018 RETROFIT METAL ROOF MODIFICATIONS AND REPAIRS

12 2. Install sealants where required by drawings, specifications, and manufacturer's installation instructions. Employ only proven sealant installation techniques, which will ensure that sealants will be deposited in uniform, continuous ribbons without gaps or air pockets, with complete wetting of the bond surfaces equally on opposite side. Except as otherwise indicated, fill sealant channel to a slightly convex surface to shed water from vertical surface over counter-flashing, slightly below adjoining surfaces. B. Flashing and Trim: Comply with performance requirements, manufacturer s written installation instructions, SMACNA and NRCA. Provide concealed fasteners where possible, and set units true to line and level as indicated. Install work with laps, joints, and seams that will be permanently watertight and weather resistant. 1. Install exposed flashing and trim that is without excessive oil canning, buckling, and tool marks and that is true to line and levels indicated, with exposed edges folded back to form hems. Install sheet metal flashing and trim to fit substrates and to result in waterproof and weather-resistant performance. 2. Expansion Provisions: Provide for thermal expansion of exposed flashing and trim. Space movement joints at a maximum of 10 feet with no joints allowed within 24 inches of corner or intersection. Where lapped or bayonet-type expansion provisions cannot be used or would not be sufficiently weather resistant and waterproof, form expansion joints of intermeshing hooked flanges, not less than 1 inch deep, filled with butyl sealant (concealed within joints). C. (Gutters and downspouts are specified in Division 7 Section Flashing and Sheet Metal. ) D. Pipe Flashing: Form flashing around pipe penetration and metal roof panels. Fasten and seal to metal roof panels as recommended by manufacturer. Pipes shall penetrate the center of the roof panel. Coordinate with other trades to ensure the proper installation of pipe penetrations. Pipe penetrations shall not go through panel seams, unless curbed. 3.7 FIELD QUALITY CONTROL A. Damaged materials, including wet batt insulation, shall not be installed. B. Acceptable tolerances are as follows: 1. The top framing member surface supporting the new roof shall not be out of plane with the new roof by more than 1/8" in 12". 2. The framing system shall be installed in a plumb and vertical position. Out of plumb tolerance shall not exceed +/- 1/8" in 12". 3.8 FIELD QUALITY CONTROL A. Remove and replace applications of metal roof panels where inspections indicate that they do not comply with specified requirements. B. Additional inspections, at Contractor s expense, will be performed to determine compliance of replaced or additional work with specified requirements. 3.9 CLEANING AND PROTECTION A. Remove temporary protective coverings and strippable films, if any, as metal roof panels are installed, unless otherwise indicated in manufacturer s written installation instructions. On completion of metal roof panel installation, clean finished surfaces as recommended by metal roof panel manufacturer. Maintain in a clean condition during construction. 2/1/2018 RETROFIT METAL ROOF MODIFICATIONS AND REPAIRS

13 B. Where panels are cut or scratched to a point that they are undesirable to the Owner, the contractor will replace such panels at no cost to the Owner. The use of touch-up paint will only be allowed if it is from the manufacturer s coil coating applicator and approved by the Owner. 2/1/2018 RETROFIT METAL ROOF MODIFICATIONS AND REPAIRS

14 3.10 ROOFING INSTALLER'S WARRANTY A. WHEREAS <Insert name> of <Insert address>, herein called the Roofing Installer, has performed roofing and associated work ( work ) on the following project: 1. Owner: Prince William County Schools 2. Address: <Insert address.> 3. Building Name/Type: <Insert information.> 4. Address: <Insert address.> 5. Area of Work: <Insert information.> 6. Acceptance Date: <Insert date.> 7. Warranty Period: <Insert time.> 8. Expiration Date: <Insert date.> B. AND WHEREAS Roofing Installer has contracted (either directly with Owner or indirectly as a subcontractor) to warrant said work against leaks and faulty or defective materials and workmanship for designated Warranty Period, C. NOW THEREFORE Roofing Installer hereby warrants, subject to terms and conditions herein set forth, that during Warranty Period he will, at his own cost and expense, make or cause to be made such repairs to or replacements of said work as are necessary to correct faulty and defective work and as are necessary to maintain said work in a watertight condition. D. This Warranty is made subject to the following terms and conditions: 1. Specifically excluded from this Warranty are damages to work and other parts of the building, and to building contents, caused by: a. lightning; b. peak gust wind speed exceeding 90 mph; c. fire; d. failure of roofing system substrate, including cracking, settlement, excessive deflection, deterioration, and decomposition; e. faulty construction of parapet walls, copings, chimneys, skylights, vents, equipment supports, and other edge conditions and penetrations of the work; f. vapor condensation on bottom of roofing; and g. activity on roofing by others, including construction contractors, maintenance personnel, other persons, and animals, whether authorized or unauthorized by Owner. 2. When work has been damaged by any of foregoing causes, Warranty shall be null and void until such damage has been repaired by Roofing Installer and until cost and expense thereof have been paid by Owner or by another responsible party so designated. 3. Roofing Installer is responsible for damage to work covered by this Warranty but is not liable for consequential damages to building or building contents resulting from leaks or faults or defects of work. 4. During Warranty Period, if Owner allows alteration of work by anyone other than Roofing Installer, including cutting, patching, and maintenance in connection with penetrations, attachment of other work, and positioning of anything on roof, this Warranty shall become null and void on date of said alterations, but only to the extent said alterations affect work covered by this Warranty. If Owner engages Roofing 2/1/2018 RETROFIT METAL ROOF MODIFICATIONS AND REPAIRS

15 Installer to perform said alterations, Warranty shall not become null and void unless Roofing Installer, before starting said work, shall have notified Owner in writing, showing reasonable cause for claim, that said alterations would likely damage or deteriorate work, thereby reasonably justifying a limitation or termination of this Warranty. 5. During Warranty Period, if original use of roof is changed and it becomes used for, but was not originally specified for, a promenade, work deck, spray-cooled surface, flooded basin, or other use or service more severe than originally specified, this Warranty shall become null and void on date of said change, but only to the extent said change affects work covered by this Warranty. 6. Owner shall promptly notify Roofing Installer of observed, known, or suspected leaks, defects, or deterioration and shall afford reasonable opportunity for Roofing Installer to inspect work and to examine evidence of such leaks, defects, or deterioration. 7. This Warranty is recognized to be the only warranty of Roofing Installer on said work and shall not operate to restrict or cut off Owner from other remedies and resources lawfully available to Owner in cases of roofing failure. Specifically, this Warranty shall not operate to relieve Roofing Installer of responsibility for performance of original work according to requirements of the Contract Documents, regardless of whether Contract was a contract directly with Owner or a subcontract with Owner's General Contractor. E. IN WITNESS THEREOF, this instrument has been duly executed this <Insert day> day of <Insert month>, <Insert year>. 1. Authorized Signature: <Insert signature.> 2. Name: <Insert name.> 3. Title: <Insert title.> END OF SECTION /1/2018 RETROFIT METAL ROOF MODIFICATIONS AND REPAIRS

16 MASTER TEMPLATE SECTION METAL WALL PANELS PART 1 - GENERAL 1.1 RELATED DOCUMENTS A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 1 Specification Sections, apply to this Section. 1.2 SUMMARY A. This Section includes the following: 1. Concealed-fasteners, lap-seam metal wall panels. 2. Field-installed insulation (with Z-furring) at CMU substrates. B. Related Sections include the following: 1. Division 5 Section Structural Steel 2. Division 6 Section Sheathing 3. Division 7 Section Metal Roof Panels 4. Division 7 Section SBS-Modified Bituminous Membrane Roofing. 5. Division 7 Section Flashing and Sheet Metal 1.3 DEFINITIONS A. Metal Wall Panel Assembly: Metal wall panels, attachment system components, miscellaneous metal framing, thermal insulation, and accessories necessary for a complete weathertight wall system. 1.4 PERFORMANCE REQUIREMENTS A. General: Provide metal roof panel assemblies that comply with performance requirements specified as determined by testing manufacturers' standard assemblies similar to those indicated for this Project, by a qualified testing and inspecting agency. B. Structural Performance: Provide metal wall panel assemblies capable of withstanding the effects the following loads and stresses within limits and under conditions indicated, based on testing according to ASTM E 1592: 1. Wind Loads: Determine loads based on uniform wind pressure indicated on Drawings. 2. Calculations will need to be sealed by a Professional Engineer registered in the Commonwealth of Virginia. C. Thermal Movements: Allow for thermal movements from ambient and surface temperatures changes by preventing buckling, opening of joints, overstressing of components, failure of joint sealants, failure of connections, and other detrimental effects. Base calculation 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. D. All materials, installations, and fastenings shall meet the specifications of the primary manufacturer for the wall panel system warranty. As such, the system warranty shall cover all membrane and flashing materials, installations, and their attachment, as well as all insulation, and accessory materials, installations and their attachment. METAL WALL PANELS

17 MASTER TEMPLATE 1.5 SUBMITTALS A. Product Data: For each type of product indicated in Part 2 of this Section. Include construction details, material descriptions, dimensions of individual components and profiles, and finishes for each type of wall panel and accessory. 1. If a listed product is not required for the completion of the project, submit a letter stating that the product is not required. If it is determined later in the project that the product is required for completion of the project, a submittal will be required prior to installation of product. B. Installation or Erection Manual: Submit three (3) copies manufacturer s current Division 7 installation or erection manual for wall panel systems required for project. Any deviation from the printed instructions must be approved in writing by the wall panel system manufacturer's authorized representative and the Owner. C. Shop Drawings: Show fabrication and installation layouts of metal wall panels; details of edge conditions, joints, panel profiles, corners, anchorages, attachment system, trim, flashings, closures, and accessories; and special details. Distinguish between factory-, shop- and fieldassembled work. A Professional Engineer registered in the Commonwealth of Virginia shall seal drawings and calculations. Provide layouts at 1/4-inch per 12-inches. 1. Accessories: Include details of the following items, at 1-1/2 inches per 12 inches scale minimum: a. Flashing and trim. b. Anchorage system. D. Qualification Data: For Installer. 1. Installer Certification indicating the manufacturer certifies that the Installer is approved, authorized, or is licensed by the manufacturer to install the specified system and is eligible to receive the manufacturer s warranty. 2. Certification signed by system manufacturer certifying that the specified system complies with requirements specified in this section. 3. Submit documentation that on-site installers have been trained and approved by the manufacturer. This system must be installed by a company specializing in specified system with a minimum of five (5) years experience and a minimum of twenty (20) installations. The company must be currently listed at the time of Bid as an Approved Contractor by the appropriate Warranty Program of the panel manufacturer. 4. Submit a list of five buildings with the specified system of the proposed manufacturer and clients of the Contractor. Include phone number and name of in-field person responsible for inspection approval. E. Samples for Color Selection: For metal wall panel with factory-applied colors finishes. F. Product Test Reports: Based on evaluation of comprehensive tests performed by a qualified testing agency, for each product. G. Maintenance Data: For metal wall panels to include in maintenance manuals. H. Warranties: Special warranties specified in this Section. 1.6 QUALITY ASSURANCE A. Installer Qualifications: This wall panel system must be installed by a company specializing in Metal Wall Panel application with a minimum of five (5) years experience and a minimum of twenty (20) installations. The company must be currently listed at the time of Bid as an METAL WALL PANELS

18 MASTER TEMPLATE Approved Contractor by the appropriate Warranty Program of the manufacturer. There must be no deviations made without the prior written approval of the Engineer and manufacturer. B. Manufacturer Qualifications: Obtain primary products from a single manufacturer, which have produced these types of products successfully for not less than five (5) years. Provide secondary products as recommended by manufacturer of primary products for use with wall panel system specified and covered under primary manufacturer's wall panel systems guarantee. C. Source Limitations: Obtain metal wall panels through one source from a single manufacturer. D. Pre-Submittal Conference: Conduct a Pre-submittal Conference with metal wall panel system manufacturer's authorized technical representative, Wall Panel Installer, Roofing Installer, Contractor, Owner and Architect. Furnish copies of product data, manufacturer s standard wall panel system warranty for Owner approval a minimum of fourteen business days prior to conference date. E. Preinstallation Conference: Conduct pre-installation conference at Project site. Conference attendees to include the Contractor, wall panel installer, roofing installer, representative of wall panel system manufacturer, and representatives of trades involved in or affected by the installation and its coordination or integration with other materials and installations that have preceded or will follow. Advise Architect and Owner of scheduled meeting date. Review methods and procedures related to wall panel system including, but not limited to, the following: 1. Meet with Owner, Architect, Owner's insurer if applicable, testing and inspecting agency representative, metal wall panel Installer, metal wall panel manufacturer's representative, structural-supports Installer, roofing installer, and installers whose work interfaces with or affects metal wall panels including installers of storefront, curtain wall, coping and roof fasciae. 2. Review and finalize construction schedule and verify availability of materials, Installer's personnel, equipment, and facilities needed to make progress and avoid delays. 3. Review methods and procedures related to metal wall panel installation, including manufacturer's written instructions. 4. Examine support conditions for compliance with requirements, including alignment between and attachment to structural members. 5. Review flashings, special siding details, wall penetrations, openings, and condition of other construction that will affect metal wall panels. 6. Review temporary protection requirements for metal wall panels during and after installation. 7. Review wall panel observation and repair procedures after metal wall panel installation. 1.7 DELIVERY, STORAGE, AND HANDLING A. Deliver components, sheets, metal wall panels, and other manufactured items so as not to be damaged or deformed. Package metal wall panels for protection during transportation and handling. B. Unload, store, and erect metal wall panels in a manner to prevent bending, warping, twisting, and surface damage. C. Stack metal wall panels on platforms or pallets, covered with suitable weathertight and ventilated covering. Store metal wall panels to ensure dryness, with positive slope for drainage of water. Do not store metal wall panels in contact with other materials that might cause staining, denting, or other surface damage. METAL WALL PANELS

19 MASTER TEMPLATE D. Protect strippable protective covering on metal wall panels from exposure to sunlight and high humidity, except to extent necessary for period of metal wall panel installation. E. Protect extruded polystyrene insulation as follows: 1. Do not expose to sunlight, except to extent necessary for period of installation and concealment. 2. Protect against ignition at all times. Do not deliver foam-plastic insulation materials to Project site before installation time. 3. Complete installation and concealment of plastic materials as rapidly as possible in each area of construction. F. At a minimum, materials are to be covered/protected by reinforced tarpaulins. 1.8 PROJECT CONDITIONS A. Weather Limitations: Proceed with installation only when existing and forecasted weather conditions permit assembly of metal wall panels to be performed according to manufacturers' written instructions and warranty requirements. B. Field Measurements: Verify locations of structural framing and wall opening dimensions by field measurements before metal wall panel fabrication and indicate measurements on Shop Drawings. 1.9 COORDINATION A. Coordinate metal wall panel assemblies with rain drainage work, flashing, trim, and construction of girts, studs, and other adjoining work to provide a leakproof, secure, and noncorrosive installations WARRANTY A. Special Warranty: Manufacturer s standards form in which manufacturer agrees to repair or replace components of metal wall panel assemblies that fail in materials or workmanship within specified warranty period. 1. Failures include, but no limited to, the following: a. Structural failures including rupturing, cracking, or puncturing. b. Deterioration of metals and other materials beyond normal weathering. 2. Warranty Period: Two (2) years from date of Substantial Completion. B. Provide two-year Contractor's Warranty for materials and workmanship on form provided at end of this section. C. Special Warranty on Panel Finishes: Manufacturer's standard form in which manufacturer agrees to repair finish or replace metal wall panels that show evidence of deterioration of factory-applied finishes within specified warranty period. 1. Exposed Panel Finish: Deterioration includes, but is not limited to, the following: a. Color fading more than 5 Hunter units when tested according to ASTM D b. Chalking in excess of a No. 8 rating when tested according to ASTM D c. Cracking, checking, peeling, or failure of paint to adhere to bare metal. 2. Finish Warranty Period: 20 years from date of Substantial Completion. METAL WALL PANELS