Exhibit L UFGS 07 60 00.pdf

USACE / NAVFAC / AFCEC / NASA UFGS- 07 60 00 ( May 2017) Change 2 - 11/ 18 Pr epar i ng Act i v i t y: NAVFAC Super sedi ng UFGS- 07 60 00 ( August 2008)

UNI FI ED FACI LI TI ES GUI DE SPECI FI CATI ONS

Ref er ences ar e i n agr eement wi t h UMRL dat ed Januar y 2021

SECTION TABLE OF CONTENTS

DIVISION 07 - THERMAL AND MOISTURE PROTECTION

SECTION 07 60 00

FLASHING AND SHEET METAL

05/ 17, CHG 2: 11/ 18

PART 1 GENERAL

1.1 REFERENCES

1.2 GENERAL REQUIREMENTS

1.3 SUBMITTALS

1.4 MISCELLANEOUS REQUIREMENTS

1.4.1 Product Data

1.4.2 Finish Samples

1.4.3 Operation and Maintenance Data

1.5 DELIVERY, HANDLING, AND STORAGE

PART 2 PRODUCTS

2.1 RECYCLED CONTENT

2.2 MATERIALS

2.2.1 Exposed Sheet Metal Items

2.2.2 Drainage

2.2.3 Copper, Sheet and Strip

2.2.4 Lead-Coated Copper Sheet

2.2.5 Lead Sheet

2.2.6 Steel Sheet, Zinc-Coated (Galvanized)

2.2.7 Zinc Sheet and Strip

2.2.8 Stainless Steel

2.2.9 Terne-Coated Steel

2.2.10 Aluminum Alloy Sheet and Plate

2.2.10.1 Alclad

2.2.11 Finishes

2.2.12 Cool Roof Finishes

2.2.12.1 Energy Star Certification

2.2.12.2 ASHRAE 189.1 Compliance

2.2.12.3 ASHRAE 90.1 Compliance

2.2.13 Aluminum Alloy, Extruded Bars, Rods, Shapes, and Tubes

2.2.14 Solder

2.2.15 Reglets

2.2.15.1 Polyvinyl Chloride Reglets

SECTION 07 60 00 Page 1

2.2.15.2 Metal Reglets

2.2.15.2.1 Caulked Reglets

2.2.15.2.2 Friction Reglets

2.2.16 Scuppers

2.2.17 Conductor Heads

2.2.18 Splash Pans

2.2.19 Copings

2.2.20 Bituminous Plastic Cement

2.2.21 Roofing Felt

2.2.22 Asphalt Primer

2.2.23 Fasteners

PART 3 EXECUTION

3.1 INSTALLATION

3.1.1 Metal Roofing

3.1.1.1 [Flat Copper,] [Zinc,] [Terne-coated Steel] Roofing

3.1.1.2 Standing-seam Method

3.1.1.3 Flat-seam Method

3.1.2 Workmanship

3.1.3 Nailing

3.1.4 Cleats

3.1.5 Bolts, Rivets, and Screws

3.1.6 Seams

3.1.6.1 Flat-lock Seams

3.1.6.2 Lap Seams

3.1.6.3 Loose-Lock Expansion Seams

3.1.6.4 Standing Seams

3.1.6.5 Flat Seams

3.1.7 Soldering

3.1.7.1 Edges

3.1.8 Welding and Mechanical Fastening

3.1.8.1 Welding of Aluminum

3.1.8.2 Mechanical Fastening of Aluminum

3.1.9 Protection from Contact with Dissimilar Materials

3.1.9.1 Copper or Copper-bearing Alloys

3.1.9.2 Aluminum

3.1.9.3 Metal Surfaces

3.1.9.4 Wood or Other Absorptive Materials

3.1.10 Expansion and Contraction

3.1.11 Base Flashing

3.1.12 Counterflashing

3.1.13 Metal Reglets

3.1.13.1 Caulked Reglets

3.1.13.2 Friction Reglets

3.1.14 Polyvinyl Chloride Reglets for Temporary Construction

3.1.15 Gravel Stops and fascia

3.1.15.1 Edge Strip

3.1.15.2 Joints

3.1.16 Metal Drip Edges

3.1.17 Gutters

3.1.18 Downspouts

3.1.18.1 Terminations

3.1.19 Flashing for Roof Drains

3.1.20 Scuppers

3.1.21 Conductor Heads

3.1.22 Splash Pans

3.1.23 Open Valley Flashing

3.1.24 Eave Flashing

SECTION 07 60 00 Page 2

3.1.25 Sheet Metal Covering on Flat, Sloped, or Curved Surfaces

3.1.26 Expansion Joints

3.1.26.1 Roof Expansion Joints

3.1.26.2 Floor and Wall Expansion Joints

3.1.27 Flashing at Roof Penetrations and Equipment Supports

3.1.28 Single Pipe Vents

3.1.29 Stepped Flashing

3.1.30 Copings

3.2 PAINTING

3.2.1 Aluminum Surfaces

3.3 CLEANING

3.4 REPAIRS TO FINISH

3.5 FIELD QUALITY CONTROL

3.5.1 Procedure

ATTACHMENTS:

Table II

-- End of Section Table of Contents --

SECTION 07 60 00 Page 3

USACE / NAVFAC / AFCEC / NASA UFGS- 07 60 00 ( May 2017) Change 2 - 11/ 18 Pr epar i ng Act i v i t y: NAVFAC Super sedi ng UFGS- 07 60 00 ( August 2008)

UNI FI ED FACI LI TI ES GUI DE SPECI FI CATI ONS

Ref er ences ar e i n agr eement wi t h UMRL dat ed Januar y 2021

SECTION 07 60 00

FLASHING AND SHEET METAL

05/ 17, CHG 2: 11/ 18

NOTE: Thi s gui de speci f i cat i on cover s t he r equi r ement s f or f l ashi ng and sheet met al wor k i ncl udi ng gut t er s and downspout s, scupper s, spl ash pans, and sheet met al r oof i ng.

Adher e t o UFC 1-300-02 Uni f i ed Faci l i t i es Gui de Speci f i cat i ons ( UFGS) For mat St andar d when edi t i ng t hi s gui de speci f i cat i on or pr epar i ng new pr oj ect speci f i cat i on sect i ons. Edi t t hi s gui de speci f i cat i on f or pr oj ect speci f i c r equi r ement s by addi ng, del et i ng, or r evi s i ng t ext . For br acket ed i t ems, choose appl i cabl e i t em( s) or i nser t appr opr i at e i nf or mat i on.

Remove i nf or mat i on and r equi r ement s not r equi r ed i n r espect i ve pr oj ect , whet her or not br acket s ar e present.

Comment s, suggest i ons and r ecommended changes f or t hi s gui de speci f i cat i on ar e wel come and shoul d be submi t t ed as a Criteria Change Request (CCR) .

NOTE: The speci f i ed sheet met al r oof i ng i s t he t ype commonl y used f or on- si t e f abr i cat i on whi ch does not i ncl ude f act or y f abr i cat ed or pr ef or med met al r oof i ng. Pr ef or med met al r oof i ng i s cover ed i n ot her Di v i s i on 7 sect i ons. Gr avi t y r oof vent i l at or s, r oof scut t l es, l ouver s, and si mi l ar i t ems ar e not i ncl uded i n t hi s sect i on. Thi s gui de speci f i cat i on r equi r es ext ensi ve edi t i ng when used wi t h s i ngl e pl y r oof syst ems i n or der t o assur e compatibility.

NOTE: Show det ai l s of sheet met al wor k on pr oj ect dr awi ngs i n accor dance wi t h t he appr opr i at e det ai l s i n t he Ar chi t ect ur al Sheet Met al Manual of t he Sheet

SECTION 07 60 00 Page 4

Met al and Ai r Condi t i oni ng Cont r act or s Nat i onal Associ at i on ( SMACNA) 1793.

Coor di nat e speci f i cat i ons wi t h t he dr awi ngs so t hat dr awi ng det ai l s and SMACNA 1793 r equi r ement s do not conf l i c t or r epeat . Del et e r ef er ences t o SMACNA 1793 when r equi r ement s ar e det ai l ed on t he dr awi ngs.

NOTE: On t he dr awi ngs, show:

1. Sheet met al r oof i ng assembl y, pr of i l e, ext ent , and sl ope. Speci f y i ng met al r oof i ng f or l ow sl ope ( l ess t han 2: 12 pi t ch) r oof s i s di scour aged due t o a pr opensi t y of met al r oof s t o l eak at l ower pi t ches.

Consi der ot her r oof assembl i es f or 2: 12 and l ower slopes.

2. Roof dr ai n, base, count er open val l ey, and eave flashings

3. f asci a, dr i p edges, mi scel l aneous t r i m.

4. Gut t er s and downspout s.

5. Expansi on j oi nt det ai l s - ( i nt er i or and ext er i or ) at wal l s, cei l i ngs, f l oor s, r oof , and par apet s. Pr ovi de i somet r i c det ai l s f or expansi on j oi nt i nt er sect i ons.

PART 1 GENERAL

NOTE: Sheet met al col or must be dur abl e and l ong l ast i ng and r esi st f adi ng and chal k i ng. Speci f y pr oduct s such as coat ed st eel , anodi zed al umi num, or baked enamel . Pai nt i ng i n t he f i el d, ot her t han t ouch- ups ar e pr ohi bi t ed. Thi s does not pr ecl ude t he use of nat ur al mat er i al s such as copper or al umi num, however avoi d t he use of copper wher e dr ai nage f r om copper wi l l pass over exposed masonr y, st onewor k, or ot her met al sur f aces.

Gal vani zed st eel i s not per mi t t ed as an opt i on t o ot her met al s speci f i ed. Gal vani zed st eel may be speci f i ed f or t empor ar y st r uct ur es or wher e i t may be sat i sf act or y due t o c l i mat i c condi t i ons. Wher e gal vani zed st eel i s speci f i ed, make changes t o t he t ext as f ol l ows:

Par agr aph REFERENCES:

ASTM A653/ A653M

( Gal vani zed) by t he Hot - Di p Pr ocess, Commer ci al Qual i t y

SECTION 07 60 00 Page 5

Par agr aph MATERI ALS Add: Gal vani zed St eel : ASTM A653/ A653M, Coat i ng G90.

Par agr aph PROTECTI ON OF ALUMI NUM: Requi r e gal vani zed st eel t o be t r eat ed t he same as al umi num, i . e. , separ at ed f r om copper or pr ot ect ed.

Par agr aph CONNECTI ONS AND JOI NTI NG: Requi r e gal vani zed st eel t o be sol der ed.

Par agr aph EXPANSI ON JOI NTS: Expansi on j oi nt s t o be spaced at 12. 0 m 40 f oot i nt er val s f or gal vani zed steel.

1.1 REFERENCES

NOTE: Thi s par agr aph i s used t o l i s t t he publ i cat i ons c i t ed i n t he t ext of t he gui de speci f i cat i on. The publ i cat i ons ar e r ef er r ed t o i n t he t ext by basi c desi gnat i on onl y and l i s t ed i n t hi s par agr aph by or gani zat i on, desi gnat i on, dat e, and t i t l e.

Use t he Ref er ence Wi zar d' s Check Ref er ence f eat ur e when you add a Ref er ence I dent i f i er ( RI D) out si de of t he Sect i on' s Ref er ence Ar t i c l e t o aut omat i cal l y pl ace t he r ef er ence i n t he Ref er ence Ar t i c l e. Al so use t he Ref er ence Wi zar d' s Check Ref er ence f eat ur e t o updat e t he i ssue dat es.

Ref er ences not used i n t he t ext wi l l aut omat i cal l y be del et ed f r om t hi s sect i on of t he pr oj ect speci f i cat i on when you choose t o r econci l e r ef er ences i n t he publ i sh pr i nt pr ocess.

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.

AMERICAN SOCIETY OF HEATING, REFRIGERATING AND AIR-CONDITIONING

ENGINEERS (ASHRAE)

ASHRAE 90.1 - IP (2013) Energy Standard for Buildings Except Low-Rise Residential Buildings

ASHRAE 90.1 - SI (2013) Energy Standard for Buildings Except Low-Rise Residential Buildings

ASHRAE 189.1 (2014) Standard for the Design of High-Performance Green Buildings Except Low-Rise Residential Buildings

AMERICAN WELDING SOCIETY (AWS)

AWS D1.2/D1.2M (2014; Errata 1 2014; Errata 2 2020)

SECTION 07 60 00 Page 6

Structural Welding Code - Aluminum

ASTM INTERNATIONAL (ASTM)

ASTM A308/A308M (2010) Standard Specification for Steel Sheet, Terne (Lead-Tin Alloy) Coated by the Hot Dip Process

ASTM A480/A480M (2020a) Standard Specification for General Requirements for Flat-Rolled Stainless and Heat-Resisting Steel Plate, Sheet, and Strip

ASTM A653/A653M (2020) Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process

ASTM B32 (2020) Standard Specification for Solder Metal

ASTM B69 (2020) Standard Specification for Rolled Zinc

ASTM B101 (2012; R 2019) Standard Specification for Lead-Coated Copper Sheet and Strip for Building Construction

ASTM B209 (2014) Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate

ASTM B209M (2014) Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate (Metric)

ASTM B221 (2014) Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes

ASTM B221M (2013) Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes (Metric)

ASTM B370 (2012; R 2019) Standard Specification for Copper Sheet and Strip for Building Construction

ASTM C1549 (2016) Standard Test Method for Determination of Solar Reflectance Near Ambient Temperature Using a Portable Solar Reflectometer

ASTM D41/D41M (2011; R 2016) Standard Specification for Asphalt Primer Used in Roofing, Dampproofing, and Waterproofing

ASTM D226/D226M (2017) Standard Specification for Asphalt-Saturated Organic Felt Used in Roofing and Waterproofing

SECTION 07 60 00 Page 7

ASTM D1784 (2020) Standard Specification for Rigid Poly(Vinyl Chloride) (PVC) Compounds and Chlorinated Poly(Vinyl Chloride) (CPVC) Compounds

ASTM D4586/D4586M (2007; E 2012; R 2012) Asphalt Roof Cement, Asbestos-Free

ASTM E408 (2013) Standard Test Methods for Total Normal Emittance of Surfaces Using Inspection-Meter Techniques

ASTM E971 (2011) Standard Practice for Calculation of Photometric Transmittance and Reflectance of Materials to Solar Radiation

ASTM E1918 (2016) Standard Test Method for Measuring Solar Reflectance of Horizontal and Low-Sloped Surfaces in the Field

ASTM E1980 (2011) Standard Practice for Calculating Solar Reflectance Index of Horizontal and Low-Sloped Opaque Surfaces

SHEET METAL AND AIR CONDITIONING CONTRACTORS' NATIONAL ASSOCIATION

(SMACNA)

SMACNA 1793 (2012) Architectural Sheet Metal Manual, 7th Edition

SINGLE PLY ROOFING INDUSTRY (SPRI)

ANSI/SPRI RD-1 (2014) Performance Standard for Retrofit Drains

U.S. DEPARTMENT OF ENERGY (DOE)

Energy Star (1992; R 2006) Energy Star Energy Efficiency Labeling System (FEMP)

1.2 GENERAL REQUIREMENTS

Finished sheet metal assemblies must form a weathertight enclosure without waves, warps, buckles, fastening stresses or distortion, while allowing for expansion and contraction without damage to the system. The sheet metal installer is responsible for cutting, fitting, drilling, and other operations in connection with sheet metal modifications required to accommodate the work of other trades. Coordinate installation of sheet metal items used in conjunction with roofing with roofing work to permit continuous, uninterrupted roofing operations.

1.3 SUBMITTALS

NOTE: Revi ew Submi t t al Descr i pt i on ( SD) def i ni t i ons i n Sect i on 01 33 00 SUBMI TTAL PROCEDURES and edi t t he f ol l owi ng l i s t , and cor r espondi ng submi t t al i t ems i n t he t ext , t o r ef l ect onl y t he submi t t al s r equi r ed f or t he pr oj ect . The Gui de Speci f i cat i on

SECTION 07 60 00 Page 8 t echni cal edi t or s have cl assi f i ed t hose i t ems t hat r equi r e Gover nment appr oval , due t o t hei r compl exi t y or cr i t i cal i t y, wi t h a " G. " Gener al l y, ot her submi t t al i t ems can be r evi ewed by t he Cont r act or ' s Qual i t y Cont r ol Syst em. Onl y add a " G" t o an i t em i f t he submi t t al i s suf f i c i ent l y i mpor t ant or compl ex i n cont ext of t he pr oj ect .

For Ar my pr oj ect s, f i l l i n t he empt y br acket s f ol l owi ng t he " G" c l assi f i cat i on, wi t h a code of up t o t hr ee char act er s t o i ndi cat e t he appr ovi ng aut hor i t y. Codes f or Ar my pr oj ect s usi ng t he Resi dent Management Syst em ( RMS) ar e: " AE" f or Ar chi t ect - Engi neer ; " DO" f or Di st r i ct Of f i ce ( Engi neer i ng Di v i s i on or ot her or gani zat i on i n t he Di st r i ct Of f i ce) ; " AO" f or Ar ea Of f i ce; " RO" f or Resi dent Of f i ce; and " PO" f or Pr oj ect Of f i ce. Codes f ol l owi ng t he " G" t ypi cal l y ar e not used f or Navy, Ai r For ce, and NASA pr oj ect s.

The " S" c l assi f i cat i on i ndi cat es submi t t al s r equi r ed as pr oof of compl i ance f or sust ai nabi l i t y Gui di ng Pr i nci pl es Val i dat i on or Thi r d Par t y Cer t i f i cat i on and as descr i bed i n Sect i on 01 33 00 SUBMI TTAL

PROCEDURES.

Choose t he f i r st br acket ed i t em f or Navy, Ai r For ce, and NASA pr oj ect s, or choose t he second br acket ed i t em f or Ar my pr oj ect s.

Government approval is required for submittals with a "G" or "S" classification. Submittals not having a "G" or "S" classification are [for Contractor Quality Control approval.][for information only. When used, a code following the "G" classification identifies the office that will review the submittal for the Government.] Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-02 Shop Drawings

Exposed Sheet Metal Coverings; G[, [_____]]

Gutters ; G[, [_____]]

Downspouts ; G[, [_____]]

Expansion Joints ; G[, [_____]]

Gravel Stops and fascia ; G[, [_____]]

Splash Pans ; G[, [_____]]

Flashing for Roof Drains ; G[, [_____]]

Base Flashing ; G[, [_____]]

Counterflashing ; G[, [_____]]

Flashing at Roof Penetrations and Equipment Supports ; G[, [_____]]

SECTION 07 60 00 Page 9

Reglets ; G[, [_____]]

Scuppers ; G[, [_____]]

Copings ; G[, [_____]]

Drip Edges ; G[, [_____]]

Conductor Heads ; G[, [_____]]

Open Valley Flashing ; G[, [_____]]

Eave Flashing ; G[, [_____]]

Recycled Content ; S

SD-03 Product Data

Cool Roof Data; G[, [_____]]

SD-04 Samples

Finish Samples ; G[, [_____]]

SD-08 Manufacturer's Instructions

Instructions for Installation ; G[, [_____]]

Quality Control Plan ; G[, [_____]]

SD-10 Operation and Maintenance Data

Cleaning and Maintenance ; G[, [_____]]

1.4 MISCELLANEOUS REQUIREMENTS

1.4.1 Product Data

Indicate thicknesses, dimensions, fastenings, anchoring methods, expansion joints, and other provisions necessary for thermal expansion and contraction. Scaled manufacturer's catalog data may be submitted for factory fabricated items.

1.4.2 Finish Samples

Submit two color charts and two finish sample chips from manufacturer's standard color and finish options for each type of finish indicated.

1.4.3 Operation and Maintenance Data

Submit detailed instructions for installation and quality control during installation, cleaning and maintenance , for each type of assembly indicated.

1.5 DELIVERY, HANDLING, AND STORAGE

Package and protect materials during shipment. Uncrate and inspect materials for damage, dampness, and wet-storage stains upon delivery to

SECTION 07 60 00 Page 10 the job site. Remove from the site and replace damaged materials that cannot be restored to like-new condition. Handle sheet metal items to avoid damage to surfaces, edges, and ends. Store materials in dry, weather-tight, ventilated areas until installation.

PART 2 PRODUCTS

2.1 RECYCLED CONTENT

Provide products with recycled content. Provide data for each product with recycled content, identifying percentage of recycled content.

2.2 MATERIALS

NOTE: Per mi t use of opt i onal mat er i al s t o ext ent t hat pr oj ect desi gn, r el at i ve cost s, l ocal envi r onment al condi t i ons, and commer ci al avai l abi l i t y per mi t . Rel at i ve cost s f or mat er i al s l i s t ed i n Tabl e I r ange f r om 100 as i ndex f or st ai nl ess st eel f ol l owed by t er ne- coat ed st eel , z i nc- coat ed st eel , and copper i n t hat or der down t o appr oxi mat el y 50 f or al umi num, based on wei ght s, gages and t hi cknesses i ndi cat ed. Speci f y exposed sheet met al i n mat er i al s i ndi cat ed except wher e addi t i ons t o bui l di ngs r equi r e mat chi ng of exi st i ng and i f t he appear ance of t he bui l di ng woul d be det r i ment al l y af f ect ed by use of a di f f er ent mat er i al . Use al umi num t o mat ch exi st i ng exposed zi nc- al l oy or gal vani zed met al , except i n hi ghl y cor r osi ve envi r onment s such as i n and ar ound i ndust r i al bui l di ngs, coast al ar eas, and ar eas t hat exper i ence hi gh wi nds or sand abr asi on. Wher e Cont r act or ' s choi ce i s l i mi t ed because of above condi t i ons, r evi se accor di ngl y. Del et e i t ems t hat do not appl y. Wei ght s and t hi cknesses l i s t ed ar e mi ni mum f or i t ems descr i bed. I f gr eat er wei ght s and t hi cknesses ar e j ust i f i ed by unusual l ocal condi t i ons, modi f y accor di ngl y.

NOTE: I f mat er i al i s not speci f i ed, Cont r act or wi l l have a choi ce of al umi num, copper or st ai nl ess st eel , as l i s t ed i n SMACNA 1793 and not pr ohi bi t ed her ei n. I f t he mat er i al i s speci f i ed, del et e al l ot her sheet met al speci f i cat i ons l i s t ed i n t hi s section.

The mi ni mum t hi cknesses speci f i ed i n SMACNA 1793 may be i ncr eased and ot her mat er i al s may be used i f j ust i f i ed by l ocal condi t i ons.

I f gal vani zed st eel i s r equi r ed f or t empor ar y f aci l i t i es, del et e " gal vani zed st eel " f r om t he f i r st sent ence bel ow.

SECTION 07 60 00 Page 11

NOTE: I n humi d l ocat i ons or pr oj ect l ocat i ons wi t h Envi r onment al Sever i t y Cl assi f i cat i ons ( ESC) of C3 t hr u C5, i n an at mospher e l aden wi t h sal t spr ay, st ai nl ess st eel i s r ecommended. Wher e sal t spr ay i s not sever e, f l ashi ngs, gut t er s, and downspout s may be of st ai nl ess st eel , al umi num al l oy ( 3003- N14) , or copper . Humi d l ocat i ons ar e t hose i n ASHRAE cl i mat e zones 0A, 1A, 2A, 3A, 3C, 4C and 5C ( as i dent i f i ed i n ASHRAE 90. 1) . See UFC 1- 200- 01 f or det er mi nat i on of ESC f or pr oj ect l ocat i ons.

Do not use lead, lead-coated metal, or galvanized steel. Use any metal listed by SMACNA 1793 for a particular item, unless otherwise indicated.

Provide materials, thicknesses, and configurations in accordance with SMACNA 1793 for each material. Different items need not be of the same metal, except that[ if copper is selected for any exposed item, all exposed items must be copper, and that] contact between dissimilar metals must be avoided.

Furnish sheet metal items in 2400 to 3000 mm 8 to 10 foot lengths. Single pieces less than 2400 mm 8 feet long may be used to connect to factory-fabricated inside and outside corners, and at ends of runs.

Factory fabricate corner pieces with minimum 300 mm 12 inch legs. Provide accessories and other items essential to complete the sheet metal installation. Provide accessories made of the same or compatible materials as the items to which they are applied. Fabricate sheet metal items of the materials specified below and to the gage, thickness, or weight shown in Table I at the end of this section. Provide sheet metal items with mill finish unless specified otherwise. Where more than one material is listed for a particular item in Table I, each is acceptable and may be used, except as follows:

2.2.1 Exposed Sheet Metal Items

Must be of the same material. Consider the following as exposed sheet metal: gutters, including hangers; downspouts; gravel stops and fascia ;

cap, valley, steeped, base, and eave flashings and related accessories.

2.2.2 Drainage

Do not use copper for an exposed item if drainage from that item will pass over exposed masonry, stonework or other metal surfaces. In addition to the metals listed in Table I, lead-coated copper may be used for such items.

2.2.3 Copper, Sheet and Strip

Provide in accordance with ASTM B370, cold-rolled temper, H 00 (standard).

2.2.4 Lead-Coated Copper Sheet

NOTE: Fact or y- appl i ed col or coat i ng on sheet al umi num and gal vani zed st eel may be used on bui l di ng addi t i ons wher e necessar y t o mat ch exi st i ng gal vani zed or ot her exposed pai nt ed met al wor k.

Thi s coat i ng may al so be used on sheet al umi num and gal vani zed st eel sur f aces of new bui l di ngs wher e a

SECTION 07 60 00 Page 12 l ong- l i f e ext er i or col or f i ni sh i s desi r ed.

Provide in accordance with ASTM B101.

2.2.5 Lead Sheet

NOTE: I n humi d l ocat i ons or pr oj ect l ocat i ons wi t h Envi r onment al Sever i t y Cl assi f i cat i ons ( ESC) of C3 t hr u C5, l ead sheet i s r ecommended f or pl umbi ng vent s and ot her pi pe penet r at i ons t hr ough t he r oof .

Humi d l ocat i ons ar e t hose i n ASHRAE cl i mat e zones 0A, 1A, 2A, 3A, 3C, 4C and 5C ( as i dent i f i ed i n ASHRAE 90. 1) . See UFC 1- 200- 01 f or det er mi nat i on of ESC f or pr oj ect l ocat i ons.

Provide in a minimum weight of 19.6 kilograms per square meter 4 pounds per square foot .

2.2.6 Steel Sheet, Zinc-Coated (Galvanized)

NOTE: Fact or y- appl i ed col or coat i ng on sheet al umi num and gal vani zed st eel may be used on bui l di ng addi t i ons wher e necessar y t o mat ch exi st i ng gal vani zed or ot her exposed pai nt ed met al wor k.

Thi s coat i ng may al so be used on sheet al umi num and gal vani zed st eel sur f aces of new bui l di ngs wher e a l ong- l i f e ext er i or col or f i ni sh i s desi r ed.

Provide in accordance with ASTM A653/A653M .

2.2.7 Zinc Sheet and Strip

Provide in accordance with ASTM B69, Type I, a minimum of 0.61 mm 0.024 inch thick.

2.2.8 Stainless Steel

NOTE: Fact or y- appl i ed col or coat i ng on sheet al umi num and gal vani zed st eel may be used on bui l di ng addi t i ons wher e necessar y t o mat ch exi st i ng gal vani zed or ot her exposed pai nt ed met al wor k.

Thi s coat i ng may al so be used on sheet al umi num and gal vani zed st eel sur f aces of new bui l di ngs wher e a l ong- l i f e ext er i or col or f i ni sh i s desi r ed.

Fi ni shes ar e descr i bed i n SMACNA Ar ch Manual . See ASTM A48/ A48M f or ot her t han st andar d mi l l f i ni shes.

Provide in accordance with ASTM A480/A480M , Type 302 or 304, 2D Finish, fully annealed, dead-soft temper.

SECTION 07 60 00 Page 13

2.2.9 Terne-Coated Steel

Provide in accordance with ASTM A308/A308M , a minimum of 350 by 500 mm 14 by 20 inch with minimum of 18 kilogram 40 pound coating per double base box. ASTM A308/A308M .

2.2.10 Aluminum Alloy Sheet and Plate

NOTE: Fact or y- appl i ed col or coat i ng on sheet al umi num and gal vani zed st eel may be used on bui l di ng addi t i ons wher e necessar y t o mat ch exi st i ng gal vani zed or ot her exposed pai nt ed met al wor k.

Thi s coat i ng may al so be used on sheet al umi num and gal vani zed st eel sur f aces of new bui l di ngs wher e a l ong- l i f e ext er i or col or f i ni sh i s desi r ed.

NOTE: Do not use l ess t han 0. 813 mm 0. 032- i nch t hi ck mat er i al i n humi d l ocat i ons or pr oj ect l ocat i ons wi t h Envi r onment al Sever i t y Cl assi f i cat i ons ( ESC) of C3 t hr u C5. I n hur r i cane and t yphoon ar eas, ensur e al umi num t hi ckness i s not l ess t han 1. 651 mm 0. 065 i nches wher e exposed t o t he di r ect wi nd. Humi d l ocat i ons ar e t hose i n ASHRAE cl i mat e zones 0A, 1A, 2A, 3A, 3C, 4C and 5C ( as i dent i f i ed i n ASHRAE 90. 1) . See UFC 1- 200- 01 f or det er mi nat i on of ESC f or pr oj ect l ocat i ons.

Provide in accordance with ASTM B209M ASTM B209 [anodized [clear] [color [_____][_____]]] form alloy, and temper appropriate for use. Provide material not less than[ 0.813 mm 0.032-in ][ 1.651 mm 0.065-in ] in thickness.

[ 2.2.10.1 Alclad

When fabricated of aluminum, fabricate the following items with Alclad 3003, Alclad 3004, or Alclad 3005, clad on [one side][both sides] unless otherwise indicated.

a. Gutters, downspouts, and hangers

b. Gravel stops and fascia

c. Flashing

] 2.2.11 Finishes

NOTE: I f a cool r oof i s r equi r ed, t her e ar e a number of met hods by whi ch t o speci f y r equi r ement s;

t hr ee ar e i ndi cat ed bel ow, as cont r act or opt i ons.

NOTE: Low sl ope ( pi t ches of 2: 12 or l ess) met al r oof s ar e not r ecommended, however , i f speci f i ed, cool r oof cr i t er i a i s pr ovi ded her ei n.

SECTION 07 60 00 Page 14

NOTE: Cool r oof col or s ar e not necessar i l y l i ght col or s anymor e. Thi s has t o do wi t h t he ar r angement of i ons i n t he f i ni sh coat i ng whi ch r esul t i n hi gh r ef l ect ance and emi ssi v i t y val ues. Hi gh val ues i ndi cat e f i ni shes best sui t ed t o save cool i ng ener gy and t o r educe heat i s l and ef f ect . Such coat i ngs ar e r eadi l y avai l abl e f r om most manuf act ur er s f or nomi nal upchar ges; l ook f or ' cool ' ser i es col or s and pr oduct dat a.

The t hr ee pat hs t o cool r oof s ar e descr i bed bel ow.

Val ues i ndi cat i ng compl i ance ar e gener al l y i ndi cat ed i n manuf act ur er ' s pr oduct dat a.

1) Ener gy St ar Cer t i f i cat i on:

Ener gy St ar set s I ni t i al Sol ar Ref l ect ance and I ni t i al Emi ssi v i t y as i t s cr i t er i a f or cool r oof appr oval . Low sl ope r oof f i ni shes cer t i f i ed by Ener gy St ar ar e r equi r ed t o have gr eat er t han or equal t o 0. 65 I ni t i al Sol ar Ref l ect ance; st eep sl ope r oof s ( pi t ches st eeper t han 2: 12) ar e r equi r ed t o have gr eat er t han or equal t o 0. 25 I ni t i al Sol ar Ref l ect ance. Whi l e Ener gy St ar i ndi cat es I ni t i al Emi ssi v i t y val ues of cer t i f i ed pr oduct s, i t does not set t hr eshol d cr i t er i a. A hi gher emi ssi v i t y number i s mor e ener gy ef f i c i ent . The cur r ent l i s t i s avai l abl e at :

https://www.energystar.gov/productfinder/product/certified-roof-products/results

2) ASHRAE 189. 1 Compl i ance:

The Amer i can Soci et y f or Heat i ng, Ref r i ger at i on and Ai r - Condi t i oni ng Engi neer s ( ASHRAE) st andar d 189. 1, " St andar d f or t he Desi gn of Hi gh Per f or mance Gr een Bui l di ngs" ( 2011 ver si on) speci f i es a sol ar r ef l ect i ve i ndex ( SRI ) of 78 f or l ow sl ope cool r oof s and 29 f or st eep sl ope cool r oof s. SRI i s a cal cul at i on t hat combi nes r ef l ect i v i t y and emi ssi v i t y i nt o a s i ngl e met r i c. Newer ver si ons of ASHRAE 189. 1 use 3- year aged val ues, however , many manuf act ur er s have not compl et ed t est i ng of aged val ues and t her ef or e ar e not yet abl e t o i ncl ude i t i n t hei r pr oduct dat a.

3) ASHRAE 90. 1 Compl i ance:

UFC 3- 110- 03 Roof i ng r equi r es t hat cool r oof s meet ASHRAE 90. 1 ( 2010 ver si on) Chapt er 5 val ues f or cool r oof i ng. The r equi r ement s of t hi s st andar d ar e i ncl uded her ei n, however , t hi s met hod does not appear t o di f f er ent i at e r oof angl e t o t he sun ( s l ope) and uses onl y aged val ues.

Provide exposed exterior sheet metal and aluminum with a baked on, factory applied color coating of polyvinylidene fluoride (PVF2) or approved equal fluorocarbon coating. Dry film thickness of coatings must be 0.020 to

0.033 mm 0.8 to 1.3 mils . Color to be selected from [manufacturer's full range of "cool roof" color choices][manufacturer's standard range of color choices][manufacturer's full range of color choices][as indicated on the Drawings]. Field applications of color coatings are prohibited and will

SECTION 07 60 00 Page 15 be rejected.

2.2.12 Cool Roof Finishes

Provide cool roof finish coatings and colors in accordance with one of the following methods of analysis:

2.2.12.1 Energy Star Certification

Provide roof finishes having an initial solar reflectance of [0.65 for low slope roofs with a 2:12 pitch or less when tested in accordance with ASTM E1918 and ASTM E1980][0.25 for steep slope roofs with a greater than 2:12 pitch when tested in accordance with ASTM E971][_____] and an initial emissivity of [_____] when tested in accordance with ASTM E408, or as certified by Energy Star for the particular product proposed. Certified Energy Star roof products are listed at https://www.energystar.gov/productfinder/product/certified-roof-products/results

2.2.12.2 ASHRAE 189.1 Compliance

Provide roof finishes having a minimum initial Solar Reflectance Index of [78 for low slope roofs with a 2:12 pitch or less when tested in accordance with ASTM E1918 and ASTM E1980][29 for steep slope roofs with a greater than 2:12 pitch when tested in accordance with ASTM E971][_____], to comply with ASHRAE 189.1 .

2.2.12.3 ASHRAE 90.1 Compliance

Provide roof finishes having a minimum 3-year aged solar reflectance of

0.55 when tested in accordance with ASTM C1549 or ASTM E1918, and a minimum 3-year aged thermal emittance of 0.75 when tested in accordance with ASTM E971 or ASTM E408, or, a minimum 3-year aged Solar Reflectance Index of 64 when determined in accordance with the Solar Reflectance Index method in ASTM E1980 using a convection coefficient of 6.62 W per m2 2.1 BTU per h ft2 , to comply with ASHRAE 90.1 - SI ASHRAE 90.1 - IP .

2.2.13 Aluminum Alloy, Extruded Bars, Rods, Shapes, and Tubes

ASTM B221MASTM B221.

2.2.14 Solder

Provide in accordance with ASTM B32, 95-5 tin-antimony.

2.2.15 Reglets

2.2.15.1 Polyvinyl Chloride Reglets

Provide in accordance with ASTM D1784, Type II, Grade 1, Class 14333-D,

1.9 mm 0.075 inch minimum thickness.

2.2.15.2 Metal Reglets

Provide factory fabricated caulked type or friction type reglets with a minimum opening of 6 mm 1/4 inch and a depth of 30 mm 1-1/4 inch , as approved.

SECTION 07 60 00 Page 16

2.2.15.2.1 Caulked Reglets

Provide with rounded edges, temporary reinforcing cores, and accessories as required for securing to adjacent construction. Provide built-up mitered corner pieces for inside and outside corners.

2.2.15.2.2 Friction Reglets

Provide with flashing receiving slots not less than 16 mm 5/8 inch deep, 25 mm one inch jointing tongues, and upper and lower anchoring flanges installed at 600 mm 24 inch maximum snap-lock type receiver.

2.2.16 Scuppers

Line interiors of scupper openings with sheet metal. Provide a drip edge at bottom edges with returns of not less than 25 mm one inch against the face of the outside wall at the top and sides. Provide the perimeter of the lining approximately 13 mm 1/2 inch less than the perimeter of the scupper.

2.2.17 Conductor Heads

Provide conductor heads and screens in the same material as downspouts.

Provide outlet tubes not less than 100 mm 4 inches long.

2.2.18 Splash Pans

Provide splash pans where downspouts discharge onto roof surfaces and at locations indicated. Unless otherwise indicated, provide pans not less than 600 mm long by 450 mm wide 24 inches long by 18 inches wide with metal ribs across bottoms of pans. Provide sides of pans with vertical baffles not less than 25 mm one inch high in the front, and 100 mm 4 inches high in the back.

2.2.19 Copings

Unless otherwise indicated, provide copings in copper sheets, 2400 or 3000 mm 8 or 10 feet long, joined by a 20 mm 3/4 inch locked and soldered seam.

2.2.20 Bituminous Plastic Cement

Provide in accordance with ASTM D4586/D4586M , Type I.

2.2.21 Roofing Felt

NOTE: The t wo t ypes of asphal t - sat ur at ed f el t s ar e:

t ype I whi ch i s commonl y cal l ed No. 15 asphal t f el t , and t ype I I whi ch i s commonl y cal l ed No. 30. These number s no l onger r ef er t o pr oduct wei ght s; see ASTM D2526 f or mor e i nf or mat i on. Edi t par agr aph as necessar y t o f i t pr oj ect r equi r ement s.

Provide in accordance with ASTM D226/D226M [Type I] [Type II].

2.2.22 Asphalt Primer

Provide in accordance with ASTM D41/D41M.

SECTION 07 60 00 Page 17

2.2.23 Fasteners

NOTE: I n humi d l ocat i ons or pr oj ect l ocat i ons wi t h Envi r onment al Sever i t y Cl assi f i cat i ons ( ESC) of C3 t hr u C5, use st ai nl ess st eel nai l s, bol t s and f ast ener s. Humi d l ocat i ons ar e t hose i n ASHRAE cl i mat e zones 0A, 1A, 2A, 3A, 3C, 4C and 5C ( as i dent i f i ed i n ASHRAE 90. 1) . See UFC 1- 200- 01 f or det er mi nat i on of ESC f or pr oj ect l ocat i ons.

Use the same metal as, or a metal compatible with the item fastened.[ Use stainless steel fasteners to fasten.] Confirm compatibility of fasteners and items to be fastened to avoid galvanic corrosion due to dissimilar materials.

PART 3 EXECUTION

3.1 INSTALLATION

NOTE: On- si t e f abr i cat ed f l at copper , z i nc, or t er ne- coat ed st eel met al r oof i ng i s not i ncl uded i n t ext of t hi s gui de speci f i cat i on because i t i s i nf r equent l y used. These mat er i al s do not r equi r e f i el d pai nt i ng. ( However , i f t er ne pl at e i s used, f i el d pai nt i ng must be speci f i ed: one coat of i r on oxi de pai nt on under si de bef or e appl i cat i on, and on exposed sur f aces af t er appl i cat i on. Exposed sur f aces al so r equi r e f i ni sh coat of compat i bl e ext er i or oi l pai nt over i r on oxi de pai nt ) . I f desi gn r equi r es t hi s t ype of met al r oof i ng, edi t subsect i ons bel ow as necessar y.

3.1.1 Metal Roofing

[ 3.1.1.1 [Flat Copper,] [Zinc,] [Terne-coated Steel] Roofing

Before applying roofing, cover deck with rosin-sized roofing felt. Lap 50 mm 2 inch at joints and secure in place with roofing nails. Using solder of equal parts tin and lead, solder slowly with well-heated irons to thoroughly heat sheet and completely sweat solder through full width of seam.[ Tin edges of copper to be soldered at least 20 mm 3/4 inch before sheets are locked.][ Use stainless nails in terne-coated steel]; [in copper, use solid copper or bronze roofing nails][ in zinc, use zinc-coated roofing nails.] Where roof decks abut vertical surfaces, turn metal roofing up vertical surfaces about 200 mm 8 inch where practicable;

where vertical surfaces are covered with applied materials, turn up roofing behind applied materials. Use standing-seam method for roofs having rise of more than one in four 3 inch per foot , and use flat-seam method when rise is one in four 3 inch per foot or less. Walking not permitted directly on metal roofs; provide approved walkways.

][ 3.1.1.2 Standing-seam Method

Make standing seams parallel with slope of roof. Fabricate sheets into

SECTION 07 60 00 Page 18 long lengths at shop by locking short dimensions together and thoroughly soldering joints thus formed. In applying metal, turn up one edge of course at each side seam at right angles 40 mm 1.5 inch . Then install 50 by 75 mm 2 by 3 inch cleats spaced 300 mm 12 inches apart by fastening one end of each cleat to roof with two 25 mm one inch long nails and folding roof end back over nail heads. Turn end adjoining turned-up side seam up over upstanding edge of course. Turn up adjoining edge of next course 45 mm 1.75 inches and abutting upstanding edges locked, turned over, and flattened against one side of standing seam. Make standing seams straight, rounded neatly at the top edges, and stand about 25 mm one inch above roof deck. All sheets must be same length, except as required to complete run or maintain pattern. Locate transverse joints of each panel half way between joints in adjacent sheets. Align joints of alternate sheets horizontally to produce uniform pattern, as shown in SMACNA 1793.

][ 3.1.1.3 Flat-seam Method

Lay metal so short dimension is parallel to gutter or eave lines and so water will flow over and not into seams. Make seams by turning edges of sheet 20 mm 3/4 inch and lock and solder together. If sheets are laid one at a time, secure to roof deck with cleats, using three cleats to each sheet, two on long side and one on short side. Use cleats 50 mm 2 inches wide, hooked over 20 mm 3/4 inch upturned edges of sheets, and nail to roof deck with two 25 mm one inch long nails. Turn back roof end of cleat over nail heads before next sheet is applied. If desired, sheets may be made into long lengths at shop by locking short dimensions together and soldering seams thus formed. Turn long lengths 20 mm 3/4 inch , and secure each length to roof deck by cleats spaced 300 mm 12 inches apart. Mallet and solder seams after pans are in place. All sheets to be same length, except as required to complete run or maintain pattern. Locate transverse joints of each panel half way between joints in adjacent sheets. Align joints of alternate sheets horizontally to produce uniform pattern, as shown in SMACNA 1793.

] 3.1.2 Workmanship

Make lines and angles sharp and true. Free exposed surfaces from visible wave, warp, buckle, and tool marks. Fold back exposed edges neatly to form a 13 mm 1/2 inch hem on the concealed side. Make sheet metal exposed to the weather watertight with provisions for expansion and contraction.

Make surfaces to receive sheet metal plumb and true, clean, even, smooth, dry, and free of defects and projections. For installation of items not shown in detail or not covered by specifications conform to the applicable requirements of SMACNA 1793, Architectural Sheet Metal Manual. Provide sheet metal flashing in the angles formed where roof decks abut walls, curbs, ventilators, pipes, or other vertical surfaces and wherever indicated and necessary to make the work watertight. Join sheet metal items together as shown in Table II.

3.1.3 Nailing

NOTE: I n humi d l ocat i ons or pr oj ect l ocat i ons wi t h Envi r onment al Sever i t y Cl assi f i cat i ons ( ESC) of C4 and C5, i ncl ude t he l ast sent ence i n t he par agr aph bel ow f or wi nd- r esi st ant i nst al l at i ons. Humi d l ocat i ons ar e t hose i n ASHRAE cl i mat e zones 0A, 1A, 2A, 3A, 3C, 4C and 5C ( as i dent i f i ed i n ASHRAE

SECTION 07 60 00 Page 19

90. 1) . See UFC 1- 200- 01 f or det er mi nat i on of ESC f or pr oj ect l ocat i ons.

Confine nailing of sheet metal generally to sheet metal having a maximum width of 450 mm 18 inches . Confine nailing of flashing to one edge only.

Space nails evenly not over 75 mm 3 inch on center and approximately 13 mm 1/2 inch from edge unless otherwise specified or indicated. Face nailing will not be permitted. Where sheet metal is applied to other than wood surfaces, include in shop drawings, the locations for sleepers and nailing strips required to secure the work.[ Secure flashing at one-half the normal interval to ensure a wind-resistant installation.]

3.1.4 Cleats

Provide cleats for sheet metal 450 mm 18 inches and over in width. Space cleats evenly not over 300 mm 12 inches on center unless otherwise specified or indicated. Unless otherwise specified, provide cleats of 50 mm wide by 75 mm long 2 inches wide by 3 inches long and of the same material and thickness as the sheet metal being installed. Secure one end of the cleat with two nails and the cleat folded back over the nailheads.

Lock the other end into the seam. [Where the fastening is to be made to concrete or masonry, use screws and drive in expansion shields set in concrete or masonry. ]Pre-tin cleats for soldered seams.

3.1.5 Bolts, Rivets, and Screws

Install bolts, rivets, and screws where indicated or required. Provide compatible washers where required to protect surface of sheet metal and to provide a watertight connection. Provide mechanically formed joints in aluminum sheets 1.0 mm 0.040 inches or less in thickness.

3.1.6 Seams

Straight and uniform in width and height with no solder showing on the face.

3.1.6.1 Flat-lock Seams

Finish not less than 20 mm 3/4 inch wide.

3.1.6.2 Lap Seams

Finish soldered seams not less than 25 mm one inch wide. Overlap seams not soldered, not less than 75 mm 3 inches .

3.1.6.3 Loose-Lock Expansion Seams

Not less than 75 mm 3 inches wide; provide minimum 25 mm one inch movement within the joint. Completely fill the joints with the specified sealant, applied at not less than 3 mm 1/8 inch thick bed.

3.1.6.4 Standing Seams

Not less than 25 mm one inch high, double locked without solder.

3.1.6.5 Flat Seams

Make seams in the direction of the flow.

SECTION 07 60 00 Page 20

3.1.7 Soldering

Where soldering is specified, apply to copper, terne-coated stainless steel, zinc-coated steel, and stainless steel items. Pre-tin edges of sheet metal before soldering is begun. Seal the joints in aluminum sheets of 1.0 mm 0.040 inch or less in thickness with specified sealants. Do not solder aluminum.

3.1.7.1 Edges

Scrape or wire-brush the edges of lead-coated material to be soldered to produce a bright surface. Flux brush the seams in before soldering.

Treat with soldering acid flux the edges of stainless steel to be pre-tinned. Seal the joints in aluminum sheets of 1.0 mm 0.040 inch or less in thickness with specified sealants. Do not solder aluminum.

3.1.8 Welding and Mechanical Fastening

Use welding for aluminum of thickness greater than 1.0 mm 0.040 inch .

Aluminum 1.0 mm 0.040 inch or less in thickness must be butted and the space backed with formed flashing plate; or lock joined, mechanically fastened, and filled with sealant as recommended by the aluminum manufacturer.

3.1.8.1 Welding of Aluminum

Use welding of the inert gas, shield-arc type. For procedures, appearance and quality of welds, and the methods used in correcting welding work, conform to AWS D1.2/D1.2M .

3.1.8.2 Mechanical Fastening of Aluminum

Use No. 12, aluminum alloy, sheet metal screws or other suitable aluminum alloy or stainless steel fasteners. Drive fasteners in holes made with a No. 26 drill in securing side laps, end laps, and flashings. Space fasteners 300 mm 12 inches maximum on center. Where end lap fasteners are required to improve closure, locate the end lap fasteners not more than 50 mm 2 inches from the end of the overlapping sheet.

3.1.9 Protection from Contact with Dissimilar Materials

3.1.9.1 Copper or Copper-bearing Alloys

Paint with heavy-bodied bituminous paint surfaces in contact with dissimilar metal, or separate the surfaces by means of moistureproof building felts.

3.1.9.2 Aluminum

NOTE: I n humi d l ocat i ons or pr oj ect l ocat i ons wi t h Envi r onment al Sever i t y Cl assi f i cat i ons ( ESC) of C3 t hr u C5, i nser t t he l ast sent ence. Humi d l ocat i ons ar e t hose i n ASHRAE cl i mat e zones 0A, 1A, 2A, 3A, 3C, 4C and 5C ( as i dent i f i ed i n ASHRAE 90. 1) . See UFC 1- 200- 01 f or det er mi nat i on of ESC f or pr oj ect locations.

SECTION 07 60 00 Page 21

Do not allow aluminum surfaces in direct contact with other metals except stainless steel, zinc, or zinc coating. Where aluminum contacts another metal, paint the dissimilar metal with a primer followed by two coats of aluminum paint. Where drainage from a dissimilar metal passes over aluminum, paint the dissimilar metal with a non-lead pigmented paint.[ Aluminum may be used over concrete construction, provided that required reglets are of stainless steel and aluminum surface in contact with concrete or masonry is coated with bituminous paint or zinc chromate primer.]

3.1.9.3 Metal Surfaces

Paint surfaces in contact with mortar, concrete, or other masonry materials with alkali-resistant coatings such as heavy-bodied bituminous paint.

3.1.9.4 Wood or Other Absorptive Materials

Paint surfaces that may become repeatedly wet and in contact with metal with two coats of aluminum paint or a coat of heavy-bodied bituminous paint.

3.1.10 Expansion and Contraction

Provide expansion and contraction joints at not more than 9750 mm 32 foot intervals for aluminum and at not more than 12 meter 40 foot intervals for other metals. Provide an additional joint where the distance between the last expansion joint and the end of the continuous run is more than half the required interval. Space joints evenly. Join extruded aluminum gravel stops and fascia by expansion and contraction joints spaced not more than 3600 mm 12 feet apart.

3.1.11 Base Flashing

NOTE: Br acket ed f i r st sent ence appl i es onl y t o shi ngl ed r oof s. Do not i ncl ude f or bui l t - up r oof i ng. Nor mal l y, onl y bi t umi nous base f l ashi ng shoul d be speci f i ed wi t h bui l t - up r oof i ng. Li mi t use of met al base f l ashi ng t o l ocat i ons wher e f l ashi ng i s subj ect t o damage by f oot t r af f i c and t o r uns of 6000 mm 20 f eet or l ess when used wi t h bui l t - up r oof i ng. Fl ashi ng f or heat i ng, pl umbi ng, and el ect r i cal equi pment shoul d be speci f i ed i n t he appr opr i at e sect i ons.

[Lay the base flashings with each course of the roof covering, shingle fashion, where practicable, where sloped roofs abut chimneys, curbs, walls, or other vertical surfaces. ]Extend up vertical surfaces of the flashing not less than 200 mm 8 inches and not less than 100 mm 4 inches under the roof covering. Where finish wall coverings form a counterflashing, extend the vertical leg of the flashing up behind the applied wall covering not less than 150 mm 6 inches . Overlap the flashing strips [or shingles] with the previously laid flashing not less than 75 mm 3 inches . Fasten the strips [or shingles] at their upper edge to the deck. Horizontal flashing at vertical surfaces must extend vertically above the roof surface and fastened at their upper edge to the deck a

SECTION 07 60 00 Page 22 minimum of 150 mm 6 inches on center with [large headed aluminum roofing nails] [hex headed, galvanized shielded screws] a minimum of 150 mm 2 inch lap of any surface. Solder end laps and provide for expansion and contraction. Extend the metal flashing over crickets at the up-slope side of [chimneys,] [curbs,] [and similar] vertical surfaces extending through sloping roofs, the metal flashings. Extend the metal flashings onto the roof covering not less than 115 mm 4.5 inches at the lower side of [dormer walls,] [chimneys,] [and similar] vertical surfaces extending through the roof decks. Install and fit the flashings so as to be completely weathertight. Provide factory-fabricated base flashing for interior and exterior corners. Do not use metal base flashing on built-up roofing.

3.1.12 Counterflashing

Except where indicated or specified otherwise, insert counterflashing in reglets located from 230 to 250 mm 9 to 10 inches above roof decks, extend down vertical surfaces over upturned vertical leg of base flashings not less than 75 mm 3 inches . Fold the exposed edges of counterflashings 13 mm 1/2 inch . Where stepped counterflashings are required, they may be installed in short lengths a minimum [ 200 mm by 200 mm 8 inches by 8 inches ][ 200 mm by 250 mm 8 inches by 8 inches ] or may be of the preformed single piece type. Provide end laps in counterflashings not less than 75 mm 3 inches and make it weathertight with plastic cement. Do not make lengths of metal counterflashings exceed 3000 mm 10 feet . Form flashings to the required shapes before installation. Factory form corners not less than 300 mm 12 inches from the angle. Secure the flashings in the reglets with lead wedges and space not more than 450 mm 18 inches apart; on[ chimneys and][ stair/elevator towers] short runs, place wedges closer together.

Fill caulked-type reglets or raked joints which receive counterflashing with caulking compound. Turn up the concealed edge of counterflashings built into masonry or concrete walls not less than 6 mm 1/4 inch and extend not less than 50 mm 2 inches into the walls. Install counterflashing to provide a spring action against base flashing.[ Where bituminous base flashings are provided, extend down the counter flashing as close as practicable to the top of the cant strip. Factory form counter flashing to provide spring action against the base flashing.]

3.1.13 Metal Reglets

Keep temporary cores in place during installation. Ensure factory fabricated caulked type or friction type, reglets have a minimum opening of 6 mm 1/4 inch and a minimum depth of 30 mm 1-1/4 inch , when installed.

3.1.13.1 Caulked Reglets

Wedge flashing in reglets with lead wedges every 450 mm 18 inches , caulked full and solid with an approved compound.

3.1.13.2 Friction Reglets

Install flashing snap lock receivers at 600 mm by 600 mm 24 inches on center maximum. When flashing has been inserted the full depth of the slot, caulk the slot, lock [with wedges], and fill with sealant.

3.1.14 Polyvinyl Chloride Reglets for Temporary Construction

Rigid polyvinyl chloride reglets may be provided in lieu of metal reglets for temporary construction.

SECTION 07 60 00 Page 23

3.1.15 Gravel Stops and fascia

NOTE: On pr oj ect s havi ng smoot h sur f aced r oof s, t he upst andi ng l eg of t he gr avel st op may be omi t t ed.

Speci f y i n t he appr opr i at e r oof i ng sect i on.

Coor di nat e i nst al l at i on r equi r ement s f or sheet met al gr avel st ops and f asci a wi t h t he r ef er enced r oof i ng section.

Prefabricate in the shapes and sizes indicated and in lengths not less than 2400 mm 8 feet . Extend flange at least 100 mm 4 inches onto roofing.

Provide prefabricated, mitered corners internal and external corners.

Install gravel stops and fascia after all plies of the roofing…