FA3047-10-R-0012 Atch 2AF-Division 7

802 CONS/LGCA-3 FA3047-10-R-0012

Lackland AFB TX Roofing IDIQ

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Section J – Attachment 2AF Page 1 of 22 8 Feb 2010

SECTION 07 61 15

STANDING SEAM METAL ROOFING SYSTEM

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced.

The publications are referred to within the text by the basic designation only.

ALUMINUM ASSOCIATION (AA)

AA ADM1(2005; Errata 2005) Aluminum Design Manual

AA ASM-35(2000) Specifications for Aluminum Sheet Metal Work in Building

Construction, Section 5

AMERICAN FOREST & PAPER ASSOCIATION (AF&PA)

AF&PA T101(2001) National Design Specification (NDS)for Wood Construction

AMERICAN IRON AND STEEL INSTITUTE (AISI)

AISI SG03-3(2002) Cold-Formed Steel Design Manual Set

ASTM INTERNATIONAL (ASTM)

ASTM A 1008(2009) Standard Specification for Steel Sheet, Cold-Rolled, Carbon, Structural, High-Strength Low-Alloy and High-Strength Low-Alloy with Improved

Formability, Solution Hardened, and Bake Hardened

ASTM A 366(1997e1) Commercial Steel, Sheet, Carbon,(0.15 Maximum Percent Cold-

Rolled

ASTM A 570(1998) Standard Specification for Steel, Sheet and Strip, Carbon, Hot-

Rolled

ASTM A 653(2009) Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or

Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process

ASTM A 792(2009) Standard Specification for Steel Sheet, 55% Aluminum-Zinc Alloy-

Coated by the Hot-Dip Process

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Section J – Attachment 2AF Page 2 of 22 8 Feb 2010

ASTM B 117(2009) Standing Practice for Operating Salt Spray (Fog) Apparatus

ASTM B 209(2007) Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate

ASTM D 1654(2008) Evaluation of Painted or Coated Specimens Subjected to Corrosive

Environments

ASTM D 2244(2009a) Calculation of Color Tolerances and Color Differences from

Instrumentally Measured Color Coordinates

ASTM D 2247(2002) Testing Water Resistance of Coatings in 100% Relative Humidity

ASTM D 226(2006) Standard Specification for Asphalt-Saturated Organic Felt Used in

Roofing and Waterproofing

ASTM D 2565(1999; R 2008) Xenon Arc Exposure of Plastics Intended for Outdoor

Applications

ASTM D 4214(2007) Standard Test Method for Evaluating the Degree of Chalking of

Exterior Paint Films

ASTM D 522(1993a; R 2008) Mandrel Bend Test of Attached Organic Coatings

ASTM D 523(2008) Standard Test Method for Specular Gloss

ASTM D 714(2002; R 2009) Evaluating Degree of Blistering of Paints

ASTM D 968(2005e1) Abrasion Resistance of Organic Coatings by Falling Abrasive

ASTM E 1592(2005) Structural Performance of Sheet Metal Roof and Siding Systems by

Uniform Static Air Pressure Difference

ASTM E 330(2002) Structural Performance of Exterior Windows, Doors, Skylights and

Curtain Walls by Uniform Static Air Pressure Difference

ASTM E 84(2009a) Standard Test Method for Surface Burning Characteristics of

Building Materials

ASTM G 23(1996) Operating Light-Exposure Apparatus (Carbon-Arc Type) With and

Without Water for Exposure of Nonmetallic Materials

NATIONAL ROOFING CONTRACTORS ASSOCIATION (NRCA)

NRCA Details(2003) NRCA Roof Perimeter Flashing Systems Construction Details for

Class 1 Roof Construction

Section J – Attachment 2AF Page 3 of 22 8 Feb 2010

SHEET METAL AND AIR CONDITIONING CONTRACTORS' NATIONAL

ASSOCIATION (SMACNA)

SMACNA 1793(2006) Architectural Sheet Metal Manual, Sixth Edition, Second Printing

1.2 DEFINITIONS

1.2.1 Field-Formed Seam

Seams of panels so configured that when adjacent sheets are installed the seam is sealed utilizing mechanical or hand seamers. Crimped (45 degree bend), roll formed (180 degree bend), double roll formed (2 - 180 degree bend), and roll and lock systems are types of field-formed seam systems.

1.2.2 Snap Together Seam

Panels so configured that the male and female portions of the seam interlock through the application of foot pressure or tamping with a mallet. Snap-on cap configurations are a type of snap together system.

1.2.3 Pre-Formed

Formed to the final, less field-formed seam, profile and configuration in the factory.

1.2.4 Field-Formed

Formed to the final, less field-formed seam, profile and configuration at the site of work prior to installation.

1.2.5 Roofing System

The roofing system is defined as the assembly of roofing components, including roofing panels, flashing, fasteners, and accessories which, when assembled properly result in a watertight installation.

1.3 SYSTEM DESCRIPTION

1.3.1 Design Requirements

a. Provide continuous length panels with no joints or seams, except where indicated.

Individual panels shall be removable for replacement of damaged material.

b. There shall be no exposed or penetrating fasteners except where shown on the approved shop drawings. Fasteners into wood shall be stainless steel sheet metal screws with full length threads. Fasteners into steel shall be stainless steel, zinc cast head or

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Section J – Attachment 2AF Page 4 of 22 8 Feb 2010 cadmium plated stainless steel screws inserted into predrilled holes. There shall be a minimum of two fasteners per clip. Single fasteners will be allowed when supporting structural members are prepunched or predrilled. Length and diameter of screws shall be sufficient to meet the design loads with a suitable factor of safety for the material to which the roofing components are attached. Calculate fastener capacity in accordance with AISI SG03-3, AA ADM1 or AF&PA T101 as applicable.

c. Roof panel standing seam shall include a capillary break and be mechanically locked closed by the manufacturer's locking tool. The seam shall include a continuous sealant when required by the manufacturer to withstand the rainfall and wind specified in paragraph entitled "Manufacturer's Requirements."

d. Roof panel anchor clips shall be concealed and designed to allow for thermal movement of the panels, except where specific fixed points are indicated. Provide for lateral thermal movement in panel configuration or with clips designed for lateral and longitudinal movement.

e. The system shall resist the positive and negative loads specified herein in accordance with "Sheet Building Sheathing Design Guide" of the AA ADM1 or AISI SG03-3.

Determine capacity in accordance with principles of ASTM E 330 modified as follows:

(1) Test panels shall be production material of the type proposed for use. Use either full length or partial length panels with attachment representative of the main part of the roof.

(2) Test specimens shall be five panels wide, span one or more supports, and shall have no end or edge attachment or seals that will restrict crosswise movement of the panels under load. Do not bridge longitudinal seams with tape or film that can restrict separation.

(3) Panels shall be tested to failure. Report load at failure.

f. Panels shall support walking loads without excessive distortion or telegraphing of the structural supports. Panels shall support a 250 pound load concentrated on a four square inch area at the center of the panel without buckling or permanent distortion.

1.3.2 Performance Requirements

1.3.2.1 Wind Loads

Resistance to wind uplift generated by winds of 90 mph. The roof system and attachments shall resist the following wind loads (psf) with a factor of safety appropriate for the material holding the anchor:

Negative

At eaves 56

Section J – Attachment 2AF Page 5 of 22 8 Feb 2010

At rakes 56

At ridge 56

At building corners 56

At central areas 56

The design uplift force for each connection assembly shall be that pressure given for the area under consideration, multiplied by the tributary load area of the connection assembly, and multiplied by the appropriate factor of safety, as follows:

a. Single fastener in a connection: 3.0

b. Two or more fasteners in each connection: 2.25

1.3.2.2 Roof Live Loads

Loads shall be applied on the horizontal projection of the roof structure. The minimum roof design live load shall be 20 psf.

1.3.2.3 Resistance to Water Infiltration

Roofing system shall show no infiltration at seams, edges, flashings, counterflashings and penetrations when subjected to a rainfall of 5 inches per hour with 90 mph wind.

1.3.2.4 Thermal Movement

The system shall be capable of withstanding thermal movement based on a temperature range of 10 degrees F below design low air temperature and 140 degrees F for mill finish and light colors or 180 degrees F for dark colors.

1.3.2.5 Deflection

a. Aluminum - Panel deflection shall not exceed L/140.

b. Steel - Panels shall be capable of supporting design loads between unsupported spans with deflection of not greater than L/180 of the span.

1.3.2.6 Structural Performance

The structural performance test methods and requirements shall be in accordance with

ASTM E 1592.

1.4 SUBMITTALS

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Government approval is required for submittals with a "G" designation; submittals not having a "G" designation are for Contractor Quality Control approval. The following shall be submitted in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-02 Shop Drawings

Roofing panels; G

Submit drawings as necessary to supplement the instructions and diagrams. Drawings shall include design and erection drawings containing an isometric view of the roof showing the design uplift pressures and dimensions of edge, ridge and corner zones.

Show typical and special conditions including flashings, accessory installation, materials and thicknesses, all dimensions, fixing lines, anchoring methods, sealant locations, sealant tape locations, fastener layout, sizes, spacing, provisions for thermal movement, terminations, penetrations, and attachments. Details of installation shall be in accordance with the manufacturer's Standard Instructions and details or the SMACNA 1793. The manufacturer's technical engineering department shall approve the drawings before they are submitted.

SD-03 Product Data

Roofing panels; G

Attachment clips

Closures

Accessories

Underlayment

Fasteners

Sealant

Insulation, including joint sealing measures for vapor barrier facing

Sample warranty certificate; G

Submit for all materials to be provided. Submit data sufficient to indicate conformance to specified requirements.

SD-04 Samples

Roofing panels

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Submit a 12 inch long section of typical panel in color specified.

When colors are not indicated, submit samples of not less than six different manufacturer's standard colors for selection.

Accessories

Submit each type of accessory item used in the project including, but not limited to:

each type of anchor clip, closures, fasteners and leg clamps.

Intermediate Support Section

Submit full size samples of each intermediate support section, 12 inches long.

SD-05 Design Data

Design calculations; G

SD-06 Test Reports

Structural performance; G

Panel finish; G

Submit reports of the tests required by this section.

Manufacturer's field inspection; G

Submit manufacturer's technical representative's inspection reports as required in paragraph entitled "Manufacturer's Field Inspection."

SD-07 Certificates

Manufacturer's Technical representative's Qualifications

Qualification of Installer

Submit documentation proving the installer is factory-trained, has the specified experience and is authorized by the manufacturer to install the products specified.

Include name, address, telephone number, and experience record.

Coil stock compatibility; G

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Section J – Attachment 2AF Page 8 of 22 8 Feb 2010

Provide certification of coil compatibility with roll forming machinery to be used for forming panels without warping, waviness, and rippling not part of panel profile; to be done without damage, abrasion or marking of finish coating.

SD-08 Manufacturer's Instructions

Submit manufacturer's sealant requirements for making the standing seam watertight when subjected to 5 inches of rainfall per hour simultaneous with 90 mph winds.

Installation manual; G

Submit manufacturer's printed installation manual/instructions and standard details.

SD-11 Closeout Submittals

Information card

For each roofing installation, submit a typewritten card or photoengraved aluminum card containing the information listed on Form 1 located at the end of this section.

1.5 DESIGN CALCULATIONS

Submit design calculations for the following by a structural engineer registered as a

Professional Engineer in any jurisdiction verifying that the system supplied meets the design loads indicated. Coordinate calculations with manufacturer's test results. Include calculations for:

a. Wind load uplift design pressure at roof locations specified in paragraph entitled

"Wind Loads."

b. Clip spacing and allowable load per clip calculations.

c. The fastening of clips to structure or intermediate supports.

d. Intermediate support spacing and framing and fastening to structure when required.

e. Allowable panel span at anchorage spacing indicated.

f. Safety factor used in determining loading.

g. Governing code requirements or criteria.

h. Edge and termination details.

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1.6 QUALITY ASSURANCE

1.6.1 Preroofing Conference

After submittals are received and approved but before roofing and insulation work, including associated work, is preformed, the Contracting Officer will hold a preroofing conference to review the following:

a. The drawings and specifications

b. Procedure for on site inspection and acceptance of the roofing substrate and pertinent structural details relating to the roofing system

c. Contractor's plan for coordination of the work of the various trades involved in providing the roofing system and other components secured to the roofing

d. Safety requirements.

The preroofing conference shall be attended by the Contractor and personnel directly responsible for the roofing and insulation installation, mechanical and electrical work, and the roofing manufacturer's technical representative. Conflicts among those attending the preroofing conference shall be resolved and confirmed in writing before roofing work, including associated work, is begun. Prepare written minutes of the preroofing conference and submit to the Contracting Officer.

1.6.2 Manufacturer's Technical Representative

The representative shall have authorization from manufacturer to approve field changes and be thoroughly familiar with the products and with installations in the geographical area where construction will take place. The manufacturer's representative shall be an employee of the manufacturer with at least 5 years experience in installing the roof system. The representative shall be available to perform field inspections and attend meetings as required herein, and as requested by the Contracting Officer.

1.6.3 Qualification of Installer

The roofing system installer shall be factory-trained, approved by the metal roofing system manufacturer to install the system, and shall have a minimum of three years experience as an approved applicator with that manufacturer. The applicator shall have applied five installations of similar size and scope to this project within the previous 3 years.

1.6.4 Single Source

Provide roofing panels, clips, closures and other accessories from a single manufacturer.

Provide the latest design by the manufacturer. Provide panels, clips, closures and other

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Section J – Attachment 2AF Page 10 of 22 8 Feb 2010 accessories that have been designed by the manufacturer to operate as a complete system for the intended use.

1.6.5 Manufacturer

The SSMRS shall be the product of a metal roofing industry recognized SSMRS manufacturer who has been in the practice of manufacturing SSMRS for a period of not less than 5 years and who has been involved in at least 5 projects similar in size and complexity to this project.

1.7 DELIVERY, STORAGE, AND HANDLING

Deliver, store, and handle preformed panels, bulk roofing products and other manufactured items in a manner to prevent damage or deformation.

1.7.1 Delivery

Provide adequate packaging to protect materials during shipment. Do not uncrate materials until ready for use except for inspection. Immediately upon arrival of materials at jobsite, inspect materials for damage, dampness, and staining. Replace damaged or permanently stained materials that cannot be restored to like-new condition with new material. If materials are wet, remove moisture, restack and protect panels until used.

1.7.2 Handling

Handle material carefully to avoid damage to surfaces, edges and ends.

1.7.3 Storage

Stack materials stored on the site on platforms or pallets and cover with tarpaulins or other suitable weathertight coverings which prevent water trapping or condensation.

Store panels so that water which might have accumulated during transit or storage will drain off. Do not store the panels in contact with materials that might cause staining, such as mud, lime, cement, fresh concrete or chemicals. Protect stored panels from wind damage.

1.8 Warranty

Furnish manufacturer's no dollar limit materials and workmanship warranty for the roofing system. The warranty period shall be not less than 20 years from the date of

Government acceptance of the work. The warranty shall be issued directly to the

Government. The warranty shall provide that if within the warranty period the metal roofing system becomes non-watertight or shows evidence of corrosion, perforation, peeling paint, rupture or excess weathering due to deterioration of the roofing system resulting from defective materials or workmanship the repair or replacement of the defective materials and correction of the defective workmanship shall be the

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Section J – Attachment 2AF Page 11 of 22 8 Feb 2010 responsibility of the roofing system manufacturer. Repairs that become necessary because of defective materials and workmanship while roofing is under warranty shall be performed within 7 days after notification, unless additional time is approved by the

Contracting Officer. Failure to perform repairs within the specified period of time will constitute grounds for having the repairs performed by others and the cost billed to the manufacturer. Contractor shall also provide a 2 year contractor installation warranty.

PART 2 PRODUCTS

2.1 ROOFING PANELS

Panels shall have interlocking ribs for securing adjacent sheets. System for securing the roof covering to structural framing members shall be concealed clip fastening system with no fasteners penetrating the panels except at the ridge or eave, rakes, penetrations, and end laps. Backing plates and ends of panels at end laps shall be predrilled or prepunched; factory prepare ends of panels to be lapped by trimming part of seam, die-setting or swaging ends of panels. Length of sheets shall be sufficient to cover the entire length of any unbroken roof slope when such slope is 30 feet or less. When length of run exceeds 30 feet, each sheet in the run shall extend over two or more spans. Sheets longer than 30 feet may be furnished if approved by the Contracting Officer. Make provisions for expansion and contraction at either ridge or eave, consistent with the type of system to be used. Panels from coil stock shall be formed without warping, waviness or ripples not part of the panel profile and shall be free of damage to the finish coating system.

2.1.1 Material

a. Aluminum - 3004 aluminum, ASTM B 209. Thickness of 0.040 inch minimum.

b. Steel - Zinc-coated steel conforming to ASTM A 653, G90 coating designation or aluminum-zinc alloy coated steel conforming to ASTM A 792, AZ 55 coating. Minimum thickness to be 0.023 inch thick (24 gage) minimum except when mid field of roof is subject to design wind uplift pressures of 60 psf or greater, entire roof system shall have a minimum thickness of 0.030 inch (22 gage). Prior to shipment, treat mill finish panels with a passivating chemical and oil to inhibit the formation of oxide corrosion products.

Dry, retreat, and re-oil panels that have become wet during shipment or storage but have not started to oxidize.

2.1.1.1 Thickness

0.040 inch minimum.

2.1.1.2 Finish

a. Aluminum - Alclad fluorocarbon baked enamel exterior and neutral washcoat interior

b. Steel - Factory applied, thermally cured coating to exterior and interior

Section J – Attachment 2AF Page 12 of 22 8 Feb 2010

2.1.1.3 Texture

Stucco embossed, Smooth or Smooth with raised intermediate ribs for added stiffness, as directed by Contracting Officer.

2.1.1.4 Color

Matching FED-STD 595B, No. 20095 exterior, or as directed by Contracting Officer.

2.1.1.5 Configuration

a. Provide aluminum panels of continuous lengths from ridge to eaves or from top to eaves on shed roof designs. Panels shall be 12 inches wide with a minimum 2.0 inch high vertical legs and two 0.37 inch stiffening ribs at 4 inches on center between the legs to minimize oil-canning and telegraphing of structural members. Leading vertical leg shall have a continuous groove in the rib top for anti-siphon protection when hook-rib top of next panel is locked over leading vertical leg to form the standing seam. Panels from coil stock shall be formed without warping, waviness or ripples not a part of the panel profile, and shall be free of damage to the finish coating system.

b. Provide steel sheets with width not less than 12 inches of coverage in place. Height of corrugations of adjacent roof sheets shall be not less than 2.25 inches (nominal), or as directed by Contracting Officer.

2.1.1.6 Aluminum Prefinished Coating System

Fluorocarbon baked enamel, factory-applied, minimum total dry film nominal thickness of 2.0 mils, and conforming to test requirements specified herein. Provide prefinished coating system on both faces. Interior face shall receive same coating system, or, at the

Contracting Officer's option, receive a coat of acrylic wash coat applied to a minimum total dry film nominal thickness of 0.20 mil. Color shall be as specified.

2.1.1.7 Steel Factory Color Finish

Provide factory applied, thermally cured coating to exterior and interior of metal roof and wall panels and metal accessories. Provide exterior finish top coat of 70 percent resin polyvinyldene fluoride with not less than 0.8 mil dry film thickness. Provide exterior primer with not less than 0.2 mil dry film thickness, where Contracting Officer directs panels shall be field painted. Interior finish shall consist of 0.5 mil dry film thickness backer coat. Provide exterior and interior coating meeting test requirements specified below. Tests shall have been performed on same factory finish and thickness provided.

2.2 ATTACHMENT CLIPS

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Section J – Attachment 2AF Page 13 of 22 8 Feb 2010

Fabricate clips from ASTM A 366, ASTM A 570, or ASTM A 1008 steel hot-dip galvanized in accordance with ASTM A 653, G 90, or Series 300 stainless steel. Size, shape, thickness and capacity as required to meet the load, insulation thickness and deflection criteria specified.

2.3 ACCESSORIES

Sheet metal flashings, trim, moldings, closure strips, caps, preformed crickets, equipment curbs, gutters, down spouts, and other similar sheet metal accessories provided in conjunction with preformed metal panels shall be of the same material and finish as panels, except that such items which will be concealed after installation may be provided without the finish if they are aluminum or stainless steel. Provide ridge and rib closures, as specified. Metal shall be of thickness not less than that of panels. Molded closure strips shall be closed-cell synthetic rubber, neoprene, or polyvinyl chloride premolded to match configurations of preformed metal panels. Thermal spacer blocks and other thermal barriers at concealed fasteners shall be as recommended by the roofing panel manufacturer.

2.3.1 Closures

2.3.1.1 Ridge Closure

Metal-clad foam or metal closure with foam secondary closure matching panel configuration for installation on surface of roof panel between panel ribs at ridge and headwall roof panel flashing conditions and terminations. Foam material shall not absorb water.

2.3.1.2 Rib Closure

Aluminum, corrosion resisting steel, closed-cell or solid-cell synthetic rubber, neoprene or polyvinyl chloride pre-molded to match configuration of rib opening. Material for closures shall not absorb water.

2.3.2 Fasteners

a. Aluminum - Series 300 stainless steel with composite metal and neoprene composition washers. Fasteners for attachment to structural supports and fasteners for attachment of panels shall be as approved and in accordance with manufacturer's recommendation.

Unless specified otherwise herein, fasteners shall be either self-tapping screws, bolts and nuts, or self-locking bolts. Design fastening system to withstand design loads indicated.

Fasteners shall not be over-torqued and shall develop full capacity of attachment clips.

b. Steel - Zinc-coated steel, corrosion resisting steel, zinc cast head, or nylon capped steel, type and size specified below or as otherwise approved for the applicable requirements. Design the fastening system to withstand the design loads specified.

Exposed fasteners shall be gasketed or have gasketed washers on the exterior side of the

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Section J – Attachment 2AF Page 14 of 22 8 Feb 2010 covering to waterproof the penetration. Washer material shall be compatible with the covering; have a minimum diameter of 3/8 inch for structural connections; and gasketed portion of fasteners or washers shall be neoprene or other equally durable elastomeric material approximately 1/8 inch thick.

2.3.2.1 Screws

Provide not less than No. 14 diameter for self-tapping type and not less than No. 12 diameter for self-drilling and self-tapping.

2.3.2.2 Bolts

Provide not less than 1/4 inch diameter, shouldered or plain shank as required, with proper nuts.

2.3.2.3 Automatic End-Welded Studs

Provide shouldered type with a shank diameter of not less than 3/16 inch and cap or nut for holding covering against the shoulder.

2.3.2.4 Explosive Driven Fasteners

Provide fasteners to be driven with explosive actuated tools and with a shank diameter of not less than 0.145 inch with a shank length of not less than 1/2 inch for fastening to steel and not less than one inch for fastening to concrete.

2.3.2.5 Rivets

Blind rivets shall be aluminum with 3/16 inch nominal diameter shank or stainless steel with 1/8 inch nominal diameter shank. Rivets shall be threaded stem type if used for other than fastening trim. Rivets with hollow stems shall have closed ends.

2.3.3 Sealant

Elastomeric type containing no oil or asphalt. Exposed sealant shall cure to a rubberlike consistency. Concealed sealant shall be the non-hardening type. Seam sealant shall be factory-applied, non-skinning, non-drying, and shall conform to the roofing manufacturer's recommendations. Silicone-based sealants shall not be used in contact with finished metal panels and components unless approved otherwise by the Contracting

Officer.

2.3.4 Sealant Tape

Polyvinyl chloride closed cell foam tape or composed of 99 percent solids in a base of butyl polyisobutylene rubber with the following properties and characteristics:

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Section J – Attachment 2AF Page 15 of 22 8 Feb 2010

a. Webbing and Elongation: 100% minimum at 77 degrees F

b. Adhesion: Excellent to surfaces used

c. U-V light exposure: No effect

d. Ozone: No effect

e. Weathering: 1000 hours in QUV Test Apparatus - Excellent, no cracking, bleeding, or significant changes.

f. Moisture Transmission: 0.05 to 0.15 grams per 100 square inches in 24 hours.

g. Service Temperature Tests: Bending over 1/2 inchmandrel at -60 degrees F with no cracking. Expose sealed typical metal lap joint to +350 degrees F for 24 hours with no significant loss of original properties.

h. Reaction to Metals: Non-corrosive to metals

2.3.5 GASKETS AND INSULATING COMPOUNDS

Nonabsorptive and suitable for insulating contact points of incompatible materials.

Insulating compounds shall be nonrunning after drying.

2.4 THERMAL INSULATION

Flexible blanket, rigid, or semi-rigid faced with a flexible vapor retarder. Insulation and facing shall have a flame-spread rating of 50 or less in accordance with ASTM E 84.

Vapor retarder facing shall have a permeance rating of 0.05 perm or less. Provide a thermal resistance "R" value of 20 or more. Exposed insulation shall have a white nondusting and nonshedding finish. Facings and finishes shall be factory-applied.

2.5 UNDERLAYMENT FOR WOOD SUBSTRATES

Provide underlayment ASTM D 226, Type I perforated, covered by water-resistant rosin sized building paper.

2.6 LABORATORY TESTS FOR PANEL FINISH

Previously manufactured panels of the same type and finish as proposed for the project shall have been tested by an approved testing laboratory to ensure conformance to specifications. The term "appearance of base metal" refers to the aluminum or steel base metal. Panels shall meet the following test requirements.

2.6.1 Salt Spray Test

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Section J – Attachment 2AF Page 16 of 22 8 Feb 2010

Panels shall withstand a salt spray test for a minimum of 1000 hours in accordance with

ASTM B 117, including the scribe requirement in the test. Immediately upon removal of the panel from the test, coating shall receive a rating of 10, no blistering, as determined by ASTM D 714; and a rating of 7, 1/16 inch failure at scribe, as determined by ASTM D

1654, Rating Schedule No. 1.

2.6.2 Formability Test

For formability test, when subjected to a 180 degree bend over a 1/8 inch diameter mandrel in accordance with ASTM D 522, exterior coating film shall show only microchecking of the exterior film and there shall be no loss of adhesion.

2.6.3 Accelerated Weathering Test

Panels shall withstand an accelerated weathering test for a minimum of 2000 hours in accordance with ASTM G 23 Method 1 or ASTM D 2565 without cracking, peeling, blistering, loss of adhesion of the protective coating, or corrosion of the base metal.

Protective coating that can be readily removed from the base metal with a penknife blade or similar instrument shall be considered to indicate loss of adhesion.

2.6.4 Chalking Resistance

After the 2000-hour weatherometer test, exterior coating shall not chalk greater than No.

8 rating when measured in accordance with ASTM D 4214 test procedures.

2.6.5 Color Change Test

After the 3000-hour weatherometer test, exterior coating color change shall not exceed 5

NBS units when measured in accordance with ASTM D 2244 test procedure.

2.6.6 Abrasion Resistance Test for Color Coating

When subjected to the falling sand test in accordance with ASTM D 968, coating system shall withstand a minimum of 100 liters of sand per mil of coating thickness before appearance of base metal.

2.6.7 Humidity Test

When subjected to a humidity cabinet test in accordance with ASTM D 2247 for 1000 hours, a scored panel shall show no signs of blistering, cracking, creepage, or corrosion.

2.6.8 Fire Hazard

The finish on factory-fabricated panels shall have a flame spread rating of not more than

25 when tested in accordance with ASTM E 84.

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2.6.9 Gloss

The gloss of the finish shall be 30 plus or minus 5 at an angle of 60 degrees, when measured in accordance with ASTM D 523.

2.6.10 Glare Resistance

For critical glare areas such as control towers or other structures where glare can be an operational hazard only: Surfaces of panels that will be exposed to the exterior shall have a specular reflectance of not more than 10 when measured in accordance with ASTM D

523 at an angle of 85 degrees. Requirements specified under "Formability Test" will be waived if necessary to conform to this requirement.

2.7 LINER PANELS

Fabricate liner panels of the same material as roof panels, and formed or patterned to prevent waviness and distortion. Liner panels shall have a factory applied, one mil thick minimum painted coating on the inside face, and a prime coat on the liner side.

PART 3 EXECUTION

3.1 EXAMINATION

Examine surfaces to receive standing seam metal roofing and flashing. Provide plumb and true surfaces, clean, even, smooth and as dry as possible. Ensure that surfaces are free from defects and projections which might affect the installation. Report unsuitable conditions to Contracting Officer.

3.2 PROTECTION OF DISSIMILAR METALS

Where an aluminum component is in contact with, fastened to, or contacted by drainage from dissimilar metals other than stainless steel, give such dissimilar metals one of the following treatments:

a. A heavy brush coat of primer followed by two coats of aluminum metal and masonry paint.

b. A heavy coat of alkali-resistant bituminous paint.

c. Separate contact surfaces with non-absorptive tape or gasket.

3.2.1 Contact with Masonry

Where metal is in contact with masonry, mortar, concrete, or plaster, apply a heavy coat of alkali-resistant, heavy-bodied bituminous paint.

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3.2.2 Contact with Wood

Where metal is in contact with wood or other absorptive material subject to wetting, or with wood treated with a preservative not compatible with aluminum, seal joints with sealing compound and apply one heavy brushcoat of heavy-bodied, bituminous paint.

3.3 INSTALLATION

Install in accordance with approved manufacturer's erection instructions shop drawings, and diagrams, except as specified otherwise herein. Provide panels in full and firm contact with clips. Obtain approval prior to installation on prefinished panels cut in the field, and factory applied coverings or coatings that were repaired after being abraded or damaged during handling or installation. Make repairs with material of same color as weather coating. Completely seal openings through panels. Correct defects or errors in materials in an approved manner. Replace materials which cannot be corrected in an approved manner with new materials. Provide molded closure strips where indicated and where necessary for weathertight construction. Use shims as required to ensure clip line is true. Use a spacing gage at each row of panels to ensure that panel width is not stretched or shortened. Where roof coverings are applied directly to wood decks, provide one layer of asphalt-saturated felt placed perpendicular to roof slope covered by one layer of rosin-sized building paper placed parallel to roof slope with side laps down slope and attached with roofing nails. Overlap side end laps 3 inches, offset seams in building paper with seams in felt.

3.3.1 Roof Panels

Apply roofing panels with standing seams parallel to slope of roof. Provide roofing panels in full lengths from ridge to eaves (top to eaves on shed roofs), with no transverse joints except at the junction of ventilators, curbs, skylights, chimneys, and similar openings. Locate panel end laps such that fasteners do not engage supports or otherwise restrain the longitudinal thermal movement of panels. Form interlocking rib type panel seams in the field with an automatic mechanical seamer approved by the manufacturer.

Attach panels to structure with concealed clips which are incorporated into the panel seams. Clip attachment shall allow roof to move freely and independently of the structure, except at fixed points as indicated.

3.3.2 Flashings

Provide flashing and related closures and accessories in connection with preformed metal panels as indicated and as necessary to provide a weathertight installation. Install flashing to ensure positive water drainage away from roof penetrations. Flash and seal roof at ridge, eaves and rakes, at projections through roof, and elsewhere as necessary.

Accomplish placement of closure strips, flashing, and sealing material in an approved manner that will ensure complete weathertightness. Details of installation which are not indicated shall be in accordance with the

07 61 15

Section J – Attachment 2AF Page 19 of 22 8 Feb 2010

NRCA Details, SMACNA 1793, AA ASM-35, panel manufacturer's printed instructions and details of the approved shop drawings. Installation shall allow for expansion and contraction of flashing.

3.3.3 Flashing Fasteners

Fastener spacings shall be in accordance with the panel manufacturer's recommendations and as necessary to withstand the indicated design loads. Install fasteners in roof valleys as recommended by the manufacturer of the panels. Install fasteners in straight lines within a tolerance of 1/2 inch in the length of a bay. Drive exposed penetrating type fasteners normal to the surface and to a uniform depth to seat gasketed washers properly and drive so as not to damage factory applied coating. Exercise extreme care in drilling pilot holes for fastenings to keep drills perpendicular and centered. Do not drill through sealant tapes. After drilling, remove metal filings and burrs from holes prior to installing fasteners and washers. Torque used in applying fasteners shall not exceed that recommended by the manufacturer. Remove panels deformed or otherwise damaged by over-torqued fastenings, and provide new panels.

3.3.4 Closure/Closure Strips

Set closure/closure strips in joint sealant material and apply sealant to mating surfaces prior to adding panel.

3.3.5 Insulation Installation

Insulation shall be installed between covering and supporting members to present a neat appearance. Fold and staple seams unless approved otherwise by the Contracting Officer.

3.3.5.1 Rigid or Semi-Rigid Insulation

Install in areas where insulation is exposed to view. Fasten securely without loose joints or unsightly sags.

3.3.5.2 Blanket Insulation

May be used in concealed locations. Lap facing at joints and fasten in a manner that will provide tight joints.

3.4 PROTECTION OF APPLIED ROOFING

Do not permit storing, walking, wheeling, and trucking directly on applied roofing materials. Provide temporary walkways, runways, and platforms of smooth clean boards or planks as necessary to avoid damage to applied roofing materials, and to distribute weight to conform to indicated live load limits of roof construction.

3.5 CLEANING

Section J – Attachment 2AF Page 20 of 22 8 Feb 2010

Clean exposed sheet metal work at completion of installation. Remove metal shavings, filings, nails, bolts, and wires from roofs on completion to prevent discoloration and harm to the panels and flashing. Remove grease and oil films, excess sealants handling marks, contamination from steel wool, fittings and drilling debris and scrub the work clean.

Exposed metal surfaces shall be free of dents, creases, waves, scratch marks, and solder or weld marks.

3.6 MANUFACTURER'S FIELD INSPECTION

Manufacturer's technical representative shall visit the site as necessary during the installation process to assure panels, flashings, and other components are being installed in a satisfactory manner. Manufacturer's technical representative shall perform a field inspection during the first 20 squares of roof panel installation and at substantial completion prior to issuance of warranty, as a minimum, and as otherwise requested by the Contracting Officer. Additional inspections shall not exceed one for each 100 squares of total roof area with the exception that follow-up inspections of previously noted deficiencies or application errors shall be performed as requested by the Contracting

Officer. Each inspection visit shall include a review of the entire installation to date.

After each inspection, a report, signed by the manufacturer's technical representative, shall be submitted to the Contracting Officer noting the overall quality of work, deficiencies and any other concerns, and recommended corrective actions in detail.

Notify Contracting Officer a minimum of 2 working days prior to site visit by manufacturer's technical representative.

3.7 COMPLETED WORK

Completed work shall be plumb and true without oil canning, dents, ripples, abrasion, rust, staining, or other damage detrimental to the performance or aesthetics of the completed roof assembly.

3.8 INFORMATION CARD

For each roof, provide a typewritten card, laminated in plastic and framed for interior display or a photoengraved 0.032 inch thick aluminum card for exterior display. Card to be 8 1/2 by 11 inches minimum and contain the information listed on Form 1 at end of this section. Install card near point of access to roof, or where indicated.

3.9 SCHEDULE

Some metric measurements in this section are based on mathematical conversion of

English unit measurements, and not on metric measurement commonly agreed to by the manufacturers or other parties. The English and metric units for the measurements shown are as follows:

PRODUCTS ENGLISH UNITS METRIC UNITS

Section J – Attachment 2AF Page 21 of 22 8 Feb 2010

a. Sheet Aluminum 0.040 inch 1.0 mm

b. Panels 12 inches 300 mm

- vertical legs 2 inches 50 mm

- stiffening ribs 4 inches 100 mm

c. Screws No. 14 0.242 mm

No. 12 0.216 mm

d. Bolts 1/4 inch 6 mm

e. Studs 3/16 inch 5 mm

f. Fasteners 1/2 inch 13 mm

One inch 25 mm

g. Rivets 1/16 inch 5 mm

1/8 inch 3 mm

3.10 FORM ONE

FORM 1 - PREFORMED STANDING SEAM ROOFING SYSTEM COMPONENTS

1. Contract Number:

2. Building Number & Location:

3. NAVFAC Specification Number:

4. Deck/Substrate Type:

5. Slopes of Deck/Roof Structure:

6. Insulation Type & Thickness:

7. Insulation Manufacturer:

8. Vapor Retarder: ( )Yes ( )No

9. Vapor Retarder Type:

10. Preformed Steel Standing Seam Roofing Description:

a. Manufacturer (Name, Address, & Phone No.):

b. Product Name: c. Width: d. Gage:

e. Base Metal: f. Method of Attachment:

Section J – Attachment 2AF Page 22 of 22 8 Feb 2010

11. Repair of Color Coating:

a. Coating Manufacturer (Name, Address & Phone No.):

b. Product Name:

c. Surface Preparation:

d. Recoating Formula:

e. Application Method:

12. Statement of Compliance or Exception:_________________________________

13. Date Roof Completed:

14. Warranty Period: From_______________ To_______________

15. Roofing Contractor (Name & Address):

16. Prime Contractor (Name & Address):

Contractor's Signature _________________________ Date:

Inspector's Signature _________________________ Date:

--End of Section--