Product masterspec licensed by arcom to ultra seam incorporated

Exclusively published and distributed by Architectural Computer Services, Inc. (ARCOM) for the AIA

This Product MasterSpec Section is licensed by ARCOM to Ultra Seam Incorporated ("Licensee").

This Product MasterSpec Section modifies the original MasterSpec text, and does not include the full content of the original MasterSpec Section.

Revisions made to the original MasterSpec text are made solely by the Licensee and are not endorsed by, or representative of the opinions of, ARCOM or The American Institute of Architects (AIA). Neither AIA nor ARCOM are liable in any way for such revisions or for the use of this Product MasterSpec Section by any end user. A qualified design professional should review and edit the document to suit project requirements.

For more information, contact Ultra Seam Incorporated, 14432 State Route 141 S. Clay, KY 42404; Phone: (800) 874-7326; Fax: (270) 333-9702; Website: www.ultraseam.com; Email: Info@UltraSeam.com.

For information about MasterSpec contact ARCOM at (800) 424-5080 or visit www.MasterSpec.com.

SECTION 074113.16 - STANDING-SEAM METAL ROOF PANELS

TIPS:

To view non-printing Editor's Notes that provide guidance for editing, click on Masterworks/Single File Formatting/Toggle/Editor's Notes.

To read detailed research, technical information about products and materials, and coordination checklists, click on Masterworks/Supporting Information.

Revise this Section by deleting and inserting text to meet Project-specific requirements.

This Section uses the term "Architect." Change this term to match that used to identify the design professional as defined in the General and Supplementary Conditions.

Verify that Section titles referenced in this Section are correct for this Project's Specifications; Section titles may have changed.

PART 1 - GENERAL

1.1RELATED DOCUMENTS

Retain or delete this article in all Sections of Project Manual.

A.Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.

1.2SUMMARY

A.Section includes standing-seam metal roof panels.

B.Related Sections:

Retain subparagraphs below to cross-reference requirements Contractor might expect to find in this Section but are specified in other Sections.

1.Section 072100 "Thermal Insulation" for board insulation utilized in Metal Roofing assemblies.

2.Section 074213.53 "Metal Soffit Panels" for metal panels used in horizontal soffit applications.

3.Section 076200 "Sheet Metal Flashing and Trim" for custom-fabricated roof and wall flashings utilized in conjunction with Standing Seam Roof Panels.

4.077200 "Roof Accessories" for roof curbs, roof hatches, heat and smoke vents, gravity ventilators, pipe supports, roof walkways, and preformed flashing sleeves.

5.Section 077253 "Snow Guards" for prefabricated devices designed to hold snow on the roof surface, allowing it to melt and drain off slowly.

1.3PREINSTALLATION MEETINGS

Retain "Preinstallation Conference" Paragraph below if Work of this Section is extensive or complex enough to justify a conference.

A.Preinstallation Conference: Conduct conference at [Project site] <Insert location>.

1.4ACTION SUBMITTALS

A.Product Data: For each type of product.

1.Include construction details, material descriptions, dimensions of individual components and profiles, and finishes for each type of panel and accessory.

B.Shop Drawings:

1.Include fabrication and installation layouts of metal panels; details of edge conditions, joints, panel profiles, corners, anchorages, attachment system, trim, flashings, closures, and accessories; and special details.

2.Accessories: Include details of the flashing, trim, and anchorage systems, at a scale of not less than 1-1/2 inches per 12 inches (1:10).

C.Samples for Initial Selection: For each type of metal panel indicated with factory-applied color finishes.

1.Metal Panels: 12 inches (305 mm) long by actual panel width. Include clips, fasteners, closures, and other metal panel accessories.

1.5INFORMATIONAL SUBMITTALS

Coordinate "Qualification Data" Paragraph below with qualification requirements in Section 014000 "Quality Requirements" and as may be supplemented in "Quality Assurance" Article.

A.Qualification Data: For Installer.

B.Product Test Reports: For each product, for tests performed by a qualified testing agency.

C.Field quality-control reports.

D.Sample Warranties: For special warranties.

1.6CLOSEOUT SUBMITTALS

A.Maintenance Data: For metal panels to include in maintenance manuals.

1.7QUALITY ASSURANCE

A.Installer Qualifications: An entity that employs installers and supervisors who are trained and approved by manufacturer.

1.8DELIVERY, STORAGE, AND HANDLING

A.Deliver components, metal panels, and other manufactured items so as not to be damaged or deformed. Package metal panels for protection during transportation and handling.

B.Unload, store, and erect metal panels in a manner to prevent bending, warping, twisting, and surface damage.

C.Stack metal panels horizontally on platforms or pallets, covered with suitable weathertight and ventilated covering. Store metal panels to ensure dryness, with positive slope for drainage of water. Do not store metal panels in contact with other materials that might cause staining, denting, or other surface damage.

1.9FIELD CONDITIONS

A.Weather Limitations: Proceed with installation only when existing and forecasted weather conditions permit assembly of metal panels to be performed according to manufacturers' written instructions and warranty requirements.

1.10COORDINATION

A.Coordinate sizes and locations of roof curbs, equipment supports, and roof penetrations with actual equipment provided.

B.Coordinate metal panel installation with rain drainage work, flashing, trim, construction of soffits, and other adjoining work to provide a weathertight, secure, and noncorrosive installation.

1.11WARRANTY

When warranties are required, verify with Owner's counsel that special warranties stated in this article are not less than remedies available to Owner under prevailing local laws.

A.Special Warranty: Manufacturer's standard form in which manufacturer agrees to repair or replace components of metal panel systems that fail in materials or workmanship within specified warranty period.

1.Failures include, but are not limited to, the following:

a.Structural failures including rupturing, cracking, or puncturing.

b.Deterioration of metals and other materials beyond normal weathering.

Verify available warranties and warranty periods for metal panels.

2.Warranty Period: Two years from date of Substantial Completion.

B.Special Warranty on Panel Finishes: Manufacturer's standard form in which manufacturer agrees to repair finish or replace metal panels that show evidence of deterioration of factory-applied finishes within specified warranty period.

Usually retain "Exposed Panel Finish" Subparagraph below for fluoropolymer.

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 2244.

b.Chalking in excess of a No. 8 rating when tested according to ASTM D 4214.

c.Cracking, checking, peeling, or failure of paint to adhere to bare metal.

Verify available warranties for metal panel finishes and insert number in "Finish Warranty Period" Subparagraph below. A 20-year period is available for fluoropolymer finish and is the maximum included with manufacturers' published data. Longer periods for premium finishes may be available.

2.Finish Warranty Period: 35 years from date of Substantial Completion.

Verify availability of warranty in "Special Weathertightness Warranty" Paragraph below; only a few manufacturers, for a limited number of products, offer a weathertightness warranty.

C.Special Weathertightness Warranty: Manufacturer's standard form in which manufacturer agrees to repair or replace standing-seam metal roof panel assemblies that fail to remain weathertight, including leaks, within specified warranty period.

Verify available warranties and warranty periods for units and components made by manufacturers listed in Part 2 articles.

1.Warranty Period: [20] <Insert number> years from date of Substantial Completion.

PART 2 - PRODUCTS

See Editing Instruction No. 1 in the Evaluations for cautions about named manufacturers and products. For an explanation of options and Contractor's product selection procedures, see Section 016000 "Product Requirements."

2.1PERFORMANCE REQUIREMENTS

Retain "Recycled Content" Paragraph below to specify recycled content if required. An alternative method of requiring recycled content is to retain requirement in Project's Division 01 sustainable design requirements Section that gives Contractor the option and responsibility to determine how recycled content requirements will be met.

A.Recycled Content: Average Recycled Content, Postconsumer recycled content plus one-half of preconsumer recycled content not less than 72 percent.

"Solar Reflectance Index" Paragraph below applies to LEED 2009. First option is minimum for roofs with slopes of 2:12 or less; second option is for roofs with slopes steeper than 2:12.

B.Solar Reflectance Index: Not less than [78] [29] when calculated according to ASTM E 1980, based on testing identical products by a qualified testing agency.

C.Structural Performance: Provide metal panel systems capable of withstanding the effects of the following loads, based on testing according to ASTM E 1592:

1.Deflection Limits: For wind loads, no greater than 1/180 for uplift loading and 1/240 for positive loading of the span.

Retain "Air Infiltration" and "Water Penetration under Static Pressure" paragraphs below for single-skin metal panels that span openings between supports; usually delete for panels mounted on solid substrates.

ASTM E 1680 in "Air Filtration" Paragraph below has replaced ASTM E 283 for testing metal roof panels.

D.Air Infiltration: Air leakage of not more than 0.06 cfm/sq. ft. (0.3 L/s per sq. m) when tested according to ASTM E 1680.

Value in first option in "Test-Pressure Difference" Subparagraph below is equivalent to a 25-mph (40-km/h) wind and is ASTM E 1680 default. Products tested to value in second option below, equivalent to a 50-mph (80-km/h) wind, are widely available. Revise to suit Project.

1.Test-Pressure Difference: [1.57 lbf/sq. ft. (75 Pa)] [6.24 lbf/sq. ft. (300 Pa)].

ASTM E 1646 in "Water Penetration under Static Pressure" Paragraph below has replaced ASTM E 331 for testing metal roof panels.

E.Water Penetration under Static Pressure: No water penetration when tested according to ASTM E 1646.

Test in "Hydrostatic-Head Resistance" Paragraph below is for resistance to hydrostatic pressure from standing water. Retain only for panels capable of watertight (hydrostatic) installation, not for panels used in water-shedding (hydrokinetic) installations that rely on underlayment for watertightness.

F.Hydrostatic-Head Resistance: No water penetration when tested according to ASTM E 2140.

Retain "Wind-Uplift Resistance" Paragraph below if UL-class roof is required. Verify that product is listed in UL's "Roofing Materials & Systems Directory." UL listings include requirements for the entire assembly and not solely the metal roof panels.

G.Wind-Uplift Resistance: Provide metal roof panel assemblies that comply with UL 580 for wind-uplift-resistance class indicated.

The higher the value in the options in "Uplift Rating" Subparagraph below, the greater the uplift resistance.

1.Uplift Rating: UL 90.

Retain one option in "Fire/Windstorm Classification" Subparagraph below based on windstorm classification of Project; the higher the value in the option, the greater the uplift resistance. FM Global Loss Prevention Data Sheet 1-28 multiplies the actual field-of-roof uplift pressure by a factor of 2 to obtain the factored pressure, the number that establishes the minimum FM Global approval rating. Verify availability of roofing systems that meet these classifications. Other options for classifications increase in increments of 15 (e.g., Class 1A-135, Class 1A-150, Class 1A-165, and higher). "Class 1A" signifies complying with ASTM E 108, Class A fire performance for FM Global-approved, Class 1 panel roofs.

2.Fire Classification: Class A-90.

Retain one option in "Hail Resistance" Subparagraph below. For areas that experience three or more hailstorms annually, FM Global recommends roofing systems rated SH (severe hail) instead of MH (moderate hail).

3.Hail Resistance: MH, UL Class 4 Impact Resistant.

H.Thermal Movements: Allow for thermal movements from ambient and surface temperature changes by preventing buckling, opening of joints, overstressing of components, failure of joint sealants, failure of connections, and other detrimental effects. Base calculations on surface temperatures of materials due to both solar heat gain and nighttime-sky heat loss.

2.2STANDING-SEAM METAL ROOF PANELS

A.General: Provide pre-formed metal roof panels designed to be installed in continuous lengths and interconnecting raised side edges of adjacent panels with joint type indicated and mechanically attaching panels to supports using concealed clips in side laps. Include clips, cleats, pressure plates, and accessories required for weathertight installation.

Copy paragraphs below and re-edit for each product.

Insert drawing designation for each product required. Use these designations on Drawings to identify each product. Retain “Metal Roof Panel” Subparagraphs below for those panel types included in the Project.

B.Vertical-Rib, Snap-Joint, Standing-Seam Metal Roof Panels <Insert drawing designation>: Formed with vertical ribs at panel edges and [intermediate stiffening ribs symmetrically spaced] [a flat pan] [striation pattern varying by location] between ribs; designed for sequential installation by mechanically attaching panels to supports using concealed clips located under one side of panels, engaging opposite edge of adjacent panels, and snapping panels together.

1.Basis-of-Design Product: Subject to compliance with requirements, provide Ultra Seam Incorporated; [US-150LS] [US-175LS] [US-150CL] or a comparable product by one of the following:

a.CENTRIA Architectural Systems.

b.Fabral.

c.Garland Company, Inc. (The).

d.<Insert manufacturer's name>.

2.Metallic-Coated Steel Sheet: Zinc-coated (galvanized) steel sheet complying with ASTM A 653/A 653M, G90 (Z275) coating designation, or aluminum-zinc alloy-coated steel sheet (Galvalume) complying with ASTM A 792/A 792M, Class AZ50 (Class AZM150) coating designation; structural quality. Prepainted by the coil-coating process to comply with ASTM A 755/A 755M.

a.Nominal Thickness: 0.022 inch (0.56 mm).

b.Exterior Finish: Two-coat fluoropolymer.

c.Color: [As selected by Architect from manufacturer's full range] .

3.Aluminum Sheet: Coil-coated sheet, ASTM B 209 (ASTM B 209M), alloy as standard with manufacturer, with temper as required to suit forming operations and structural performance required.

a.Thickness: 0.032 inch (0.81 mm).

b.Surface: [Smooth, flat] [Embossed] finish.

c.Exterior Finish: Two-coat fluoropolymer.

d.Color: [As indicated by manufacturer's designations] [Match Architect's samples] [As selected by Architect from manufacturer's full range] .

4.Copper Sheet: ASTM B 370, cold-rolled copper sheet, H00 temper.

a.Thickness: [16 oz./sq. ft. (0.55 mm thick)] [20 oz./sq. ft. (0.68 mm thick)].

b.Exposed Finish: Mill.

5.Clips: [One-piece fixed] [Two-piece floating] to accommodate thermal movement.

a.Material: [0.028-inch- (0.71-mm-)] [0.064-inch- (1.63-mm-)] nominal thickness, zinc-coated (galvanized) or aluminum-zinc alloy-coated steel sheet.

6.Panel Coverage: [16 inches (406 mm)] [18 inches (457 mm)] .

Retain first option if "Panel Height" subparagraph below when specifying US-150LS or US150CL panels. Retain second option when specifying US-175LS panels.

7.Panel Height: [1.5 inches (38 mm)] [1.75 inches (44 mm)] .

C.Vertical-Rib, Seamed-Joint, Standing-Seam Metal Roof Panels : Formed with vertical ribs at panel edges and [intermediate stiffening ribs symmetrically spaced] [a flat pan] [striation pattern varying by location] between ribs; designed for sequential installation by mechanically attaching panels to supports using concealed clips located under one side of panels, engaging opposite edge of adjacent panels, and mechanically seaming panels together.

1.Basis-of-Design Product: Subject to compliance with requirements, provide Ultra Seam Incorporated; [US-150] [US-200] [US-200C] [US-150C] or a comparable product by one of the following:

a.CENTRIA Architectural Systems.

b.Fabral.

c.Garland Company, Inc. (The).

d.<Insert manufacturer's name>.

2.Metallic-Coated Steel Sheet: Zinc-coated (galvanized) steel sheet complying with ASTM A 653/A 653M, G90 (Z275) coating designation, or aluminum-zinc alloy-coated steel sheet (Galvalume) complying with ASTM A 792/A 792M, Class AZ50 (Class AZM150) coating designation; structural quality. Prepainted by the coil-coating process to comply with ASTM A 755/A 755M.

a.Nominal Thickness: 0.022 inch (0.56 mm).

b.Exterior Finish: Two-coat fluoropolymer.

c.Color: [As selected by Architect from manufacturer's full range] .

3.Aluminum Sheet: Coil-coated sheet, ASTM B 209 (ASTM B 209M), alloy as standard with manufacturer, with temper as required to suit forming operations and structural performance required.

a.Thickness: 0.032 inch (0.81 mm).

b.Surface: [Smooth, flat] [Embossed] finish.

c.Exterior Finish: Two-coat fluoropolymer.

d.Color: [As selected by Architect from manufacturer's full range] .

4.Copper Sheet: ASTM B 370, cold-rolled copper sheet, H00 temper.

a.Thickness: [16 oz./sq. ft. (0.55 mm thick)] [20 oz./sq. ft. (0.68 mm thick)].

b.Exposed Finish: Mill.

5.Clips: [One-piece fixed] [Two-piece floating] to accommodate thermal movement.

a.Material: [0.028-inch- (0.71-mm-)] [0.064-inch- (1.63-mm-)] nominal thickness, zinc-coated (galvanized) or aluminum-zinc alloy-coated steel sheet.

6.Joint Type: [Single folded 45 or 90 degree] [Double folded 180 degree] [As standard with manufacturer].

7.Panel Coverage: [16 inches (406 mm)] [18 inches (457 mm)] .

Retain first option in "Panel Height" subparagraph blow when specifying US-150 panels. Retain second option when specifying US-200 panels.

8.Panel Height: [1.5 inches (38 mm)] [2.0 inches (51 mm)].

D.Clipless, Integral-Standing-Seam Metal Roof Panels : Formed with integral ribs at panel edges and a flat pan between ribs; designed for sequential installation by mechanically attaching panels to supports using screw fasteners located under concealed side of panels and lapping and interconnecting side edges of adjacent panels.

1.Basis-of-Design Product: Subject to compliance with requirements, provide Ultra Seam Incorporated; US-100NS or a comparable product by one of the following:

a.Englert, Inc.

b.Everlast Metals.

c.Firestone Metal Products, LLC.

d.<Insert manufacturer's name>.

2.Metallic-Coated Steel Sheet: Zinc-coated (galvanized) steel sheet complying with ASTM A 653/A 653M, G90 (Z275) coating designation, or aluminum-zinc alloy-coated steel sheet (Galvalume) complying with ASTM A 792/A 792M, Class AZ50 (Class AZM150) coating designation; structural quality. Prepainted by the coil-coating process to comply with ASTM A 755/A 755M.

a.Nominal Thickness: 0.022 inch (0.56 mm).

b.Exterior Finish: Two-coat fluoropolymer.

c.Color: [As selected by Architect from manufacturer's full range] .

3.Aluminum Sheet: Coil-coated sheet, ASTM B 209 (ASTM B 209M), alloy as standard with manufacturer, with temper as required to suit forming operations and structural performance required.

a.Thickness: [0.032 inch (0.81 mm)] [0.040 inch (1.02 mm)].

b.Surface: Smooth, flat finish.

c.Exterior Finish: Two-coat fluoropolymer.

d.Color: [As selected by Architect from manufacturer's full range] .

4.Copper Sheet: ASTM B 370, cold-rolled copper sheet, H00 temper.

a.Thickness: [16 oz./sq. ft. (0.55 mm thick)] [20 oz./sq. ft. (0.68 mm thick)].

b.Exposed Finish: Mill.

5.Panel Coverage: [12 inches (305 mm)] [16 inches (406 mm)].

6.Panel Height: [1.0 inch (25 mm)] [1.5 inches (38 mm)] nominal.

2.3UNDERLAYMENT MATERIALS

Retain appropriate paragraphs in this article for metal roof panels applied over sheathing. Self-adhering, high-temperature underlayment may be applied only at eaves, valleys, and other areas vulnerable to leakage, with Synthetic Underlayment applied over the remainder of the roof; or underlayment may be applied over the entire roof area.

Underlayments listed in "Self-Adhering, High-Temperature Underlayment" Paragraph below are suitable for higher temperatures associated with metal roofing. Revise if high-temperature underlayments are not required. Verify, with underlayment manufacturer, acceptability for use on roofs with slopes less than 2:12.

A.Self-Adhering, High-Temperature Underlayment: Provide self-adhering, cold-applied, sheet underlayment, a minimum of 40 mils (1.01 mm) thick, consisting of slip-resistant, polyethylene-film top surface laminated to a layer of butyl or SBS-modified asphalt adhesive, with release-paper backing. Provide primer when recommended by underlayment manufacturer.

1.Thermal Stability: Stable after testing at 245 deg F (118 deg C); ASTM D 1970.

2.Low-Temperature Flexibility: Passes after testing at minus 15 deg F (26 deg C); ASTM D 1970.

3.Manufacturers: Subject to compliance with requirements, provide products by one of the following:

a.Carlisle Residential; a division of Carlisle Construction Materials.

b.Grace Construction Products; W.R. Grace & Co. -- Conn.

c.MFM Building Products.

d.Tamko Building Products.

e.<Insert manufacturer's name>.

Retain "Synthetic Underlayment" Paragraph below if not using self-adhering, high-temperature underlayment over the entire roof area.

B.Synthetic Underlayment: (No. 30), Roof Underlayment.

2.4MISCELLANEOUS MATERIALS

A.Miscellaneous Metal Subframing and Furring: ASTM C 645; cold-formed, metallic-coated steel sheet, ASTM A 653/A 653M, G90 (Z275 hot-dip galvanized) coating designation or ASTM A 792/A 792M, Class AZ50 (Class AZM150) coating designation unless otherwise indicated. Provide manufacturer's standard sections as required for support and alignment of metal panel system.

Retain panel accessories, flashing, and trim as required and coordinate with those specified in Section 076200 "Sheet Metal Flashing and Trim."

B.Panel Accessories: Provide components required for a complete, weathertight panel system including trim, copings, fascia, mullions, sills, corner units, clips, flashings, sealants, gaskets, fillers, closure strips, and similar items. Match material and finish of metal panels unless otherwise indicated.

1.Closures: Provide closures at eaves and ridges, fabricated of same metal as metal panels.

C.Flashing and Trim: Provide flashing and trim formed from same material as metal panels as required to seal against weather and to provide finished appearance. Locations include, but are not limited to, eaves, rakes, corners, bases, framed openings, ridges, fascia, and fillers. Finish flashing and trim with same finish system as adjacent metal panels.

If required, insert special requirements for ridge closures, corner units, copings, fascia, and fillers.

D.Gutters: Formed from same material as roof panels, complete with end pieces, outlet tubes, and other special pieces as required. Fabricate in minimum 120-inch- (3048-mm-) long sections, of size and metal thickness according to SMACNA's "Architectural Sheet Metal Manual." Furnish gutter supports spaced a maximum of 36 inches (914 mm) o.c. Finish gutters to match [metal roof panels] [roof fascia and rake trim].

E.Downspouts: Formed from same material as roof panels. Fabricate in 10-foot- (3-m-) long sections, complete with formed elbows and offsets, of size and metal thickness according to SMACNA's "Architectural Sheet Metal Manual." Finish downspouts to match gutters.

F.Roof Curbs: As approved by Manufacturer.

G.Panel Fasteners: Self-tapping screws designed to withstand design loads.

H.Panel Sealants: Provide sealant type recommended by manufacturer that are compatible with panel materials, are nonstaining, and do not damage panel finish.

1.Sealant Tape: Pressure-sensitive, 100 percent solids, gray polyisobutylene compound sealant tape with release-paper backing. Provide permanently elastic, nonsag, nontoxic, nonstaining tape 7/8 inch (22 mm) wide and 1/8 inch (3 mm) thick.

2.Joint Sealant: ASTM C 920; elastomeric polyurethane or silicone sealant; of type, grade, class, and use classifications required to seal joints in metal panels and remain weathertight; and as recommended in writing by metal panel manufacturer.

3.Butyl-Rubber-Based, Solvent-Release Sealant: ASTM C 1311.

2.5FABRICATION

A.General: Fabricate and finish metal panels and accessories, 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.

C.Provide panel profile, including major ribs, striations, or intermediate stiffening ribs, if any, for full length of panel.

D.Sheet Metal Flashing and Trim: Fabricate flashing and trim to comply with manufacturer's recommendations and recommendations in SMACNA's "Architectural Sheet Metal Manual" that apply to design, 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 nonexpansion, but movable, joints in metal to accommodate sealant and to comply with SMACNA standards.

3.Conceal fasteners and expansion provisions where possible.

2.6FINISHES

A.Steel Panels and Accessories:

1.Two-Coat Fluoropolymer: AAMA 621. Fluoropolymer finish containing not less than 70 percent PVDF resin by weight in color coat. Prepare, pretreat, and apply coating to exposed metal surfaces to comply with coating and resin manufacturers' written instructions.

Finish in "Concealed Finish" Subparagraph below is frequently used as a factory finish for interior surfaces.

2.Concealed Finish: Apply pretreatment and manufacturer's standard white or light-colored acrylic or polyester backer finish consisting of prime coat and wash coat with a minimum total dry film thickness of 1 mil (0.025 mm).

B.Aluminum Panels and Accessories:

Revise or insert additional testing requirements in fluoropolymer subparagraph below if performance levels indicated in AAMA 2605 are insufficient.

1.Two-Coat Fluoropolymer: AAMA 2605. Fluoropolymer finish containing not less than 70 percent PVDF resin by weight in color coat. Prepare, pretreat, and apply coating to exposed metal surfaces to comply with coating and resin manufacturers' written instructions.

PART 3 - EXECUTION

3.1EXAMINATION

A.Certified installer shall examine substrates, areas, and conditions, for compliance with requirements for installation tolerances, metal panel supports, and other conditions affecting performance of the Work.

Retain one or both subparagraphs below.

1.Examine primary and secondary roof framing to verify that rafters, purlins, angles, channels, and other structural panel support members and anchorages have been installed within alignment tolerances required by metal roof panel manufacturer.

2.Examine solid roof sheathing to verify that sheathing joints are supported by framing or blocking and that installation is within flatness tolerances required by metal roof panel manufacturer.

Retain subparagraph below with subparagraph above for systems that depend on air- or water-resistive barriers to prevent air infiltration or water penetration.

a.Verify that air- or water-resistive barriers have been installed over sheathing or backing substrate to prevent air infiltration or water penetration.

B.Examine roughing-in for components and systems penetrating metal panels to verify actual locations of penetrations relative to seam locations of metal panels before installation.

C.Proceed with installation only after unsatisfactory conditions have been corrected.

3.2PREPARATION

A.Miscellaneous Supports: Install subframing, furring, and other miscellaneous panel support members and anchorages according to ASTM C 754 and metal panel manufacturer's written recommendations.

3.3UNDERLAYMENT INSTALLATION

Retain this article for metal roof panels applied over solid roof sheathing.

Retain "Self-Adhering Sheet Underlayment" or "Synthetic Underlayment" Paragraph below or retain both if required.

A.Self-Adhering Sheet Underlayment: Apply primer if required by manufacturer. Comply with temperature restrictions of underlayment manufacturer for installation. Apply at locations indicated on Drawings, wrinkle free, in shingle fashion to shed water, and with end laps of not less than 6 inches (152 mm) staggered 24 inches (610 mm) between courses. Overlap side edges not less than 3-1/2 inches (90 mm).[ Extend underlayment into gutter trough.]

B.Synthetic Underlayment: Apply at locations indicated [below] [on Drawings], in shingle fashion to shed water, and with lapped joints of not less than 2 inches (50 mm).

Retain one of two subparagraphs below or delete both if indicated on Drawings.

1.Apply over the entire roof surface.

2.Apply on roof not covered by self-adhering sheet underlayment. Lap over edges of self-adhering sheet underlayment not less than 3 inches (75 mm), in shingle fashion to shed water.

C.Flashings: Install flashings to cover underlayment to comply with requirements specified in Section 076200 "Sheet Metal Flashing and Trim."

3.4METAL PANEL INSTALLATION

A.General: Install metal panels according to manufacturer's written instructions in orientation, sizes, and locations indicated. Install panels perpendicular to supports unless otherwise indicated. Anchor metal panels and other components of the Work securely in place, with provisions for thermal and structural movement.

1.Flash and seal metal panels at perimeter of all openings. Fasten with self-tapping screws. Do not begin installation until air- or water-resistive barriers and flashings that will be concealed by metal panels are installed.

2.Locate and space fastenings in uniform vertical and horizontal alignment.

3.Install flashing and trim as metal panel work proceeds.

4.Align bottoms of metal panels and fasten with self-tapping screws. Fasten flashings and trim around openings and similar elements with rivets and self-tapping screws.

5.Provide weathertight decktite for pipe- and conduit-penetrating panels.

B.Fasteners:

1.Steel Panels: Use painted galvanized-steel fasteners for surfaces exposed to the exterior; use galvanized-steel fasteners for surfaces exposed to the interior.

2.Aluminum Panels: Use aluminum or stainless-steel fasteners for surfaces exposed to the exterior; use aluminum or galvanized-steel fasteners for surfaces exposed to the interior.

3.Copper Panels: Use copper, stainless-steel, or hardware-bronze fasteners.

4.Stainless-Steel Panels: Use stainless-steel fasteners.

C.Anchor Clips: Anchor metal roof panels and other components of the Work securely in place, using manufacturer's approved fasteners according to manufacturers' written instructions.

D.Metal Protection: Where dissimilar metals contact each other or corrosive substrates, protect against galvanic action as recommended in writing by metal panel manufacturer.

E.Standing-Seam Metal Roof Panel Installation: Fasten metal roof panels to supports with concealed clips at each standing-seam joint at location, spacing, and with fasteners recommended in writing by manufacturer.

1.Install clips to supports with recommended fasteners.

2.Install bearing plates at locations indicated in manufacturer's written installation instructions.

Retain "Snap Joint" or "Seamed Joint" Subparagraph below; coordinate with products selected in Part 2.

3.Snap Joint: Nest standing seams and fasten together by interlocking and completely engaging.

4.Seamed Joint: Crimp standing seams with manufacturer-approved, motorized seamer tool so clip, and metal roof panel are completely engaged.

Retain "Watertight Installation" Subparagraph below for hydrostatic (watertight) panel installation; delete if not required.

5.Watertight Installation:

a.Apply a continuous ribbon of sealant or tape to seal joints of metal panels, using sealant or tape as recommend in writing by manufacturer as needed to make panels watertight.

b.Provide sealant or tape between panels and protruding equipment, vents, and accessories.

c.At panel splices, nest panels with minimum 6-inch (152-mm) end lap, sealed with sealant and fastened together by interlocking clamping plates.

Retain "Clipless Metal Panel Inspection" Paragraph below if retaining "Clipless, Integral-Standing-Seam Metal Roof Panels" Paragraph in Part 2.

F.Clipless Metal Panel Installation: Fasten metal panels to supports with screw fasteners at location and spacing recommended by manufacturer.

G.Accessory Installation: Install accessories with positive anchorage to building and weathertight mounting, and provide for thermal expansion. Coordinate installation with flashings and other components.

1.Install components required for a complete metal panel system including trim, copings, corners, seam covers, flashings, sealants, gaskets, fillers, closure strips, and similar items. Provide types indicated by metal roof panel manufacturers; or, if not indicated, types recommended by metal roof panel manufacturer.

H.Flashing and Trim: Comply with performance requirements, manufacturer's written installation instructions, and SMACNA's "Architectural Sheet Metal Manual." 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 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 achieve 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 (3 m) with no joints allowed within 24 inches (610 mm) of corner or intersection. Where lapped 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 (25 mm) deep, filled with mastic sealant (concealed within joints).

I.Gutters: Join sections with riveted and soldered or lapped and sealed joints. Attach gutters to eave with gutter hangers spaced not more than 36 inches (914 mm) o.c. using manufacturer's standard fasteners. Provide end closures and seal watertight with sealant. Provide for thermal expansion.

J.Downspouts: Join sections with telescoping joints. Provide fasteners designed to hold downspouts securely 1 inch (25 mm) away from walls; locate fasteners at top and bottom and at approximately 60 inches (1524 mm) o.c. in between.

Retain one of two subparagraphs below.

1.Provide elbows at base of downspouts to direct water away from building.

2.Connect downspouts to underground drainage system indicated.

K.Roof Curbs: Install flashing around bases where they meet metal roof panels.

L.Pipe Flashing: Form flashing around pipe penetration and metal roof panels. Fasten and seal to metal roof panels as recommended by manufacturer.

3.5ERECTION TOLERANCES

Generally retain this article only for sophisticated or highly finished metal roof panel assemblies.

A.Installation Tolerances: Shim and align metal panel units within installed tolerance of 1/4 inch in 20 feet (6 mm in 6 m) on slope and location lines as indicated and within 1/8-inch (3-mm) offset of adjoining faces and of alignment of matching profiles.

If less-stringent tolerances are required, consider inserting installation tolerances from MCA's "Guide Specification for Residential Metal Roofing."

3.6FIELD QUALITY CONTROL FOR WEATHERTIGHT WARRANTY

Retain "Manufacturer's Field Service" Paragraph below to require a factory-authorized service representative to perform tests and inspections.

A.Manufacturer's Field Service: Authorized service representative will inspect metal roof panel installation, including accessories.

B.Remove and replace applications of metal roof panels where inspections indicate that they do not comply with specified requirements.

C.Additional inspections, at Contractor's expense, are performed to determine compliance of replaced or additional work with specified requirements.

3.7CLEANING AND PROTECTION

A.Remove temporary protective coverings and strippable films, if any, as metal panels are installed, unless otherwise indicated in manufacturer's written installation instructions. On completion of metal panel installation, clean finished surfaces as recommended by metal panel manufacturer. Maintain in a clean condition during construction.

B.Replace metal panels that have been damaged or have deteriorated beyond successful repair by finish touchup or similar minor repair procedures.