Exhibit G UFGS 07 22 00.pdf

USACE / NAVFAC / AFCEC / NASA UFGS- 07 22 00 ( Febr uar y 2016) Change 3 - 11/ 18 Pr epar i ng Act i v i t y: NAVFAC Super sedi ng UFGS- 07 22 00 ( August 2011)

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 22 00

ROOF AND DECK INSULATION

02/ 16, CHG 3: 11/ 18

PART 1 GENERAL

1.1 REFERENCES

1.2 SUBMITTALS

1.3 SHOP DRAWINGS

1.4 PRODUCT DATA

1.5 MANUFACTURER'S INSTRUCTIONS

1.6 QUALITY CONTROL

1.7 FM APPROVAL REQUIREMENTS

1.8 FIRE PERFORMANCE REQUIREMENTS

1.8.1 Insulation in Roof Systems

1.8.2 Thermal Barrier Requirements

1.8.3 Fire Resistance Ratings for Roofs

1.9 CERTIFICATIONS

1.10 DELIVERY, STORAGE, AND HANDLING

1.10.1 Delivery

1.10.2 Storage and Handling

1.11 ENVIRONMENTAL CONDITIONS

1.12 PROTECTION

1.12.1 Flame Heated Equipment

1.12.1.1 Fire Protection

1.12.1.2 Operational Requirements

1.12.2 Special Protection

1.12.3 Drippage of Bitumen

1.12.4 Completed Work

PART 2 PRODUCTS

2.1 INSULATION

2.1.1 Insulation Types

2.1.2 Mineral Fiber Insulation Board

2.1.3 Recycled Materials

2.1.4 Indoor Air Quality

2.1.5 Insulation Thickness

2.1.6 Tapered Roof Insulation

SECTION 07 22 00 Page 1

2.1.7 Cants and Tapered Edge Strips

2.2 COVER BOARD

2.2.1 Glass Mat Gypsum Roof Board

2.2.2 High Density Wood Fiber

2.3 BITUMENS

2.3.1 Asphalt Primer

2.3.2 Asphalt

2.3.3 Asphalt Roof Cement

2.4 SHEATHING PAPER FOR WOOD DECKS

2.5 MOISTURE CONTROL

2.5.1 Vapor Retarder

2.5.1.1 Asphalt Saturated Felt Base Sheet for Single Layer

Application

2.5.1.2 Asphalt-Coated Glass Felt

2.5.2 Ventilating Felt for [Poured] [Precast] Concrete Decks

2.5.3 Organic Roofing

2.6 FASTENERS

2.6.1 Roofing Nails for Wood Decks

2.6.2 Fasteners for Plywood Decks

2.6.3 Fasteners for Steel Decks

2.6.4 Fasteners for Poured Concrete Decks

2.7 WOOD NAILERS

PART 3 EXECUTION

3.1 EXAMINATION AND PREPARATION

3.1.1 Surface Inspection

3.1.2 Surface Preparation

3.2 INSTALLATION OF VAPOR RETARDER

3.2.1 Vapor Retarder on Poured Concrete Decks

3.2.2 Vapor Retarder on Precast Concrete Decks

3.2.3 Vapor Retarder on Wood Decks

3.2.4 Vapor Retarder on Steel Decks

3.2.5 Over Gypsum Insulating Concrete or Lightweight Insulating

Concrete

3.2.6 Over Concrete Decks and First Layer of Insulation on Steel

Decks

3.2.7 Over Structural Concrete on Non-Venting Support

3.3 INSTALLATION OF VENTILATING FELT

3.4 INSULATION INSTALLATION

3.4.1 Installation Using Asphalt

3.4.2 Installation Using Asphalt on Steel Decks

3.4.3 Installation of Protection for Asphalt Work

3.4.4 Installation Using Only Mechanical Fasteners

3.4.5 Special Precautions for Installation of Foam Insulation

3.4.5.1 Polyisocyanurate Insulation

3.4.5.2 Polystyrene Insulation

3.4.6 Cant Strips

3.4.7 Tapered Edge Strips

3.5 PROTECTION

3.5.1 Protection of Applied Insulation

3.5.2 Damaged Work and Materials

3.6 INSPECTION

-- End of Section Table of Contents --

SECTION 07 22 00 Page 2

USACE / NAVFAC / AFCEC / NASA UFGS- 07 22 00 ( Febr uar y 2016) Change 3 - 11/ 18 Pr epar i ng Act i v i t y: NAVFAC Super sedi ng UFGS- 07 22 00 ( August 2011)

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 22 00

ROOF AND DECK INSULATION

02/ 16, CHG 3: 11/ 18

NOTE: Thi s gui de speci f i cat i on cover s t he r equi r ement s f or i nsul at i on mat er i al s used bel ow bui l t - up r oof i ng and si ngl e pl y r oof i ng syst ems.

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) .

I nsul at i on mat er i al s appl i es t o bot h or gani c and i nor gani c mat er i al s used f or t her mal pr ot ect i on as par t of r oof i ng assembl i es or under decks.

I n new const r uct i on, pr ovi de at l east a 1 i n 24 (40 mm per 1 M) ( 1/ 2 i nch per f oot ) s l ope i n t he st r uct ur al deck and use non- t aper ed i nsul at i on.

When i t i s c l ear l y i mpr act i cabl e t o pr ovi de t he r equi r ed sl ope or i n r er oof i ng wher e t her e i s i nsuf f i c i ent s l ope, t aper ed i nsul at i on may be used.

Al so, use t aper ed i nsul at i on f or t he const r uct i on of saddl es and cr i cket s t o pr ovi de sl ope t o dr ai ns.

I nsul at i on f or pr ef abr i cat ed met al bui l di ngs i s not i ncl uded i n t hi s sect i on. I nsul at i ng sheat hi ng, ot her mat er i al s whi ch ar e not pr i mar i l y t her mal i nsul at i ng mat er i al s, and i nsul at i ng concr et e ar e

SECTION 07 22 00 Page 3 al so not i ncl uded. Such pr oduct s ar e c l assi f i ed accor di ng t o t hei r pr i mar y use, and shoul d be speci f i ed under t he appr opr i at e sect i ons.

Spr ay- appl i ed pol yur et hane f oam r oof i nsul at i on i s speci f i ed i n Sect i on 07 57 13 SPRAYED POLYURETHANE

FOAM ( SPF)

NOTE: On t he dr awi ngs, show:

1. Ext ent and l ocat i ons of wor k.

2. Di mensi ons when space l i mi t at i ons or const r uct i on f eat ur es gover n t hi ckness of i nsul at i on materials.

3. Det ai l s at cant s, edge st r i ps, and nai l er s.

4. Locat i on and spaci ng of wood nai l er s.

NOTE: UFC 1- 200- 02 pr omot es t he use of cool r oof i ng, and i ncr eased ener gy conser vat i on t hr ough addi t i onal i nsul at i on. Cool r oof desi gn i s t o f ol l ow t he r equi r ement s of UFC 3- 110- 03 Roof i ng, Chapt er , Cool Roof s. Poor desi gn of cool r oof s have r esul t ed i n uni nt ended consequences such as condensat i on wi t hi n t he r oof assembl y. Coor di nat e cool r oof desi gn wi t h t he mechani cal engi neer on t he pr oj ect t o pr ovi de appr opr i at e r oof assembl y, i nsul at i on t hi ckness, sur f ace f i ni shes appr opr i at e t o t he geogr aphi c l ocat i on and humi di t y r equi r ement s of t he pr oj ect . Ver i f y dewpoi nt and desi gn t he r oof assembl y accor di ngl y.

Mechani cal l y f ast ened si ngl e pl y r oof syst ems ar e t o compl y wi t h t he r equi r ement s f or such syst ems i n UFC 3- 110- 03 Roof i ng. Condensat i on on t he under si de of mechani cal l y f ast ened syst ems can r esul t i n i ce bui l dup i n wi nt er , mol d gr owt h, moi st ur e damage, and pr emat ur e r oof r epl acement . See Appendi x B of UFC 3- 110- 03 f or mor e i nf or mat i on.

PART 1 GENERAL

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

SECTION 07 22 00 Page 4 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.

ASTM INTERNATIONAL (ASTM)

ASTM C208 (2012; R 2017; E 2017; E 2019) Standard Specification for Cellulosic Fiber Insulating Board

ASTM C552 (2017; E 2018) Standard Specification for Cellular Glass Thermal Insulation

ASTM C578 (2019) Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation

ASTM C726 (2017) Standard Specification for Mineral Wool Roof Insulation Board

ASTM C728 (2017a) Standard Specification for Perlite Thermal Insulation Board

ASTM C1177/C1177M (2017) Standard Specification for Glass Mat Gypsum Substrate for Use as Sheathing

ASTM C1289 (2020) Standard Specification for Faced Rigid Cellular Polyisocyanurate Thermal Insulation Board

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

ASTM D312 (2000; R 2006) Standard Specification for Asphalt Used in Roofing

ASTM D2178/D2178M (2015a) Asphalt Glass Felt Used in Roofing and Waterproofing

ASTM D4263 (1983; R 2018) Standard Test Method for Indicating Moisture in Concrete by the Plastic Sheet Method

SECTION 07 22 00 Page 5

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

ASTM D4601/D4601M (2004; R 2020) Standard Specification for Asphalt-Coated Glass Fiber Base Sheet Used in Roofing

ASTM D4897/D4897M (2016) Standard Specification for Asphalt-Coated Glass-Fiber Venting Base Sheet Used in Roofing

ASTM E84 (2020) Standard Test Method for Surface Burning Characteristics of Building Materials

FM GLOBAL (FM)

FM 4450 (1989) Approval Standard for Class 1 Insulated Steel Deck Roofs

FM 4470 (2016) Single-Ply, Polymer-Modified Bitumen Sheet, Built-up Roof (BUR), and Liquid Applied Roof Assemblies for Use in Class 1 and Noncombustible Roof Deck Construction

FM APP GUIDE (updated on-line) Approval Guide http://www.approvalguide.com/

INTERNATIONAL CODE COUNCIL (ICC)

ICC IBC (2018) International Building Code

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 1 (2021) Fire Code

SCIENTIFIC CERTIFICATION SYSTEMS (SCS)

SCS SCS Global Services (SCS) Indoor Advantage

UNDERWRITERS LABORATORIES (UL)

UL 1256 (2002; Reprint Jul 2013) Fire Test of Roof Deck Constructions

UL 2818 (2013) GREENGUARD Certification Program For Chemical Emissions For Building Materials, Finishes And Furnishings

1.2 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 t echni cal edi t or s have cl assi f i ed t hose i t ems t hat

SECTION 07 22 00 Page 6 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.

NOTE: I f sust ai nabl e door har dwar e i s avai l abl e, choose br acket ed opt i on.

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

Insulation Board Layout and Attachment; G[, [_____]]

Verification of Existing Conditions ; G[, [_____]]

SD-03 Product Data

Insulation ; G[, [_____]]

Cover Board ; G[, [_____]]

Fasteners ; G[, [_____]]

Sheathing Paper ; G[, [_____]]

Moisture Control ; G[, [_____]]

SECTION 07 22 00 Page 7

[ Asphalt Products; G[, [_____]]

] Recycled Content For Insulation ; S

SD-06 Test Reports

Flame Spread Rating ; G[, [_____]]

SD-07 Certificates

Installer Qualifications ; G[, [_____]]

Certificates Of Compliance For Felt Materials ; G[, [_____]]

Indoor Air Quality For Insulation ; S

SD-08 Manufacturer's Instructions

Nails and Fasteners ; G[, [_____]]

Roof Insulation ; G[, [_____]]

1.3 SHOP DRAWINGS

NOTE: Speci f y shop dr awi ngs f or wood nai l er s when nai l er s ar e r equi r ed f or secur i ng i nsul at i on on r oof s s l oped 1 i n 24 ( 40 mm per 1 M) ( 1/ 2 i nch per foot) or mor e.

NOTE: I ncl ude r equi r ement f or backnai l i ng of f el t s when speci f i ed f or bui l t - up r oof i ng.

Submit insulation board layout and attachment indicating methods of attachment and spacing, transitions, tapered components, thicknesses of materials, and closure and termination conditions. Show locations of ridges, valleys, crickets, interface with, and slope to, roof drains.

Base shop drawings on verified field measurements and include verification of existing conditions .[ Show wood nailers.][Show location and spacing of wood nailers required for securing of insulation [and backnailing of roofing felts]].

1.4 PRODUCT DATA

Include data for material descriptions, recommendations for product shelf life, requirements for cover board or coatings, and precautions for flammability and toxicity. Include data to verify compatibility of sealants with insulation.

1.5 MANUFACTURER'S INSTRUCTIONS

Include field of roof and perimeter attachment requirements.

Provide a complete description of installation sequencing for each phase of the roofing system. Include weatherproofing procedures.

SECTION 07 22 00 Page 8

1.6 QUALITY CONTROL

Provide certification of installer qualifications from the insulation manufacturer confirming the specific installer has the required qualifications for installing the specific roof insulation system(s) indicated.

Provide certificates of compliance for felt materials .

[ 1.7 FM APPROVAL REQUIREMENTS

NOTE: FM Appr oval Gui de i ncl udes r equi r ement s f or f ast ener s f or 1- 60, 1- 90, and 1- 120 cl assi f i cat i ons f or r esi st ance t o wi nd upl i f t pr essur es. Ref er t o UFC 3- 301- 01 St r uct ur al Engi neer i ng f or wi nd l oads and speci f y FM appr oval accor di ngl y. Not e, FM appr oval number s do not cor r espond t o wi nd speeds.

Ref er t o FM Dat a Sheet s f or wi nd desi gn.

Provide fastening patterns in accordance with [FM 1-60][FM 1-90][FM 1-120] for insulation on steel decks.

] 1.8 FIRE PERFORMANCE REQUIREMENTS

1.8.1 Insulation in Roof Systems

NOTE: I ncl ude t hi s r equi r ement when i nsul at i on i s i nst al l ed over pl ywood, wood pl anks ot her t han nominal 50 mm 2 i nch t hi ck, t ongue- and- gr oove t ype, or st eel deck.

NOTE: Coor di nat e f i r e per f or mance i n i nsul at ed r oof syst ems. At a mi ni mum, compl y wi t h I CC I BC and UL1256. I f t he r oof assembl y r equi r es FM appr oval , choose t he br acket ed opt i ons.

NOTE: Ther mal bar r i er s ar e r equi r ed f or near l y al l r oof i ng appl i cat i ons wher e f oam pl ast i cs ar e pr esent . Conf i r m speci f i c pr oj ect r equi r ement s wi t h I CC I BC. For r oof i ng appl i cat i ons, smoke devel opment r at i ng does not appl y. The el i mi nat i on of t he t her mal bar r i er i s al l owed onl y under ver y speci f i c condi t i ons t her ef or e do not el i mi nat e unl ess speci f i cal l y ver i f i ed wi t h appl i cabl e l i f e saf et y codes.

Comply with the requirements of ICC IBC [or UL 1256 ] [or FM 4450 ][or FM 4470 ]. Roof insulation to have a flame spread rating of 75 or less when tested in accordance with ASTM E84. Additional documentation of compliance with flame spread rating is not required when insulation of the type used for this project as part of the specific roof assembly is listed and labeled as FM Class 1 approved. [Only roof assemblies that pass FM 4450 may be used.]

SECTION 07 22 00 Page 9

1.8.2 Thermal Barrier Requirements

Separate [polyurethane] [or] [polystyrene] insulation from a [combustible] [steel] deck with a thermal barrier of glass mat gypsum roof board or other approved barrier material in accordance with the requirements of the ICC IBC [or FM 4450 ] [or FM 4470 ][or UL 1256 ]. [Only roof assemblies that pass FM 4450 may be used.]

NOTE: Speci f y i nsul at ed r oof assembl i es i n accor dance wi t h UFC 1- 200- 01 Gener al Bui l di ng Requi r ement s, Fi r e and Smoke Pr ot ect i on sect i on, and UFC 3- 600- 01 " Fi r e Pr ot ect i on Engi neer i ng f or Faci l i t i es" . Wher e r equi r ement s conf l i c t bet ween UFCs and I BC, UFC 3- 600- 01 t akes pr ecedence; edi t t he f ol l owi ng sect i on accor di ngl y.

1.8.3 Fire Resistance Ratings for Roofs

Provide in accordance with ICC IBC Chapter 7 and Table 721.1(3) Min [Fire and Smoke] Protection For Floor and Roof Systems.

1.9 CERTIFICATIONS

Provide products certified to meet indoor air quality requirements by UL 2818 (Greenguard) Gold, SCS Global Services Indoor Advantage Gold or provide certification by other third-party programs. Provide current product certification documentation from certification body.

1.10 DELIVERY, STORAGE, AND HANDLING

1.10.1 Delivery

Deliver materials to the project site in manufacturer's unopened and undamaged standard commercial containers bearing the following legible information:

a. Name of manufacturer

b. Brand designation

c. Specification number, type, and class, as applicable, where materials are covered by a referenced specification

[ d. Asphalt flashpoint (FP), equiviscous temperature (EVT), and finished blowing temperature (FBT).

] Deliver materials in sufficient quantity to allow continuity of the work.

1.10.2 Storage and Handling

Store and handle materials in accordance with manufacturer's printed instructions. Protect from damage, exposure to open flame or other ignition sources, wetting, condensation, and moisture absorption. Keep materials wrapped and separated from off-gassing materials (such as drying paints and adhesives). Do not use materials that have visible moisture or biological growth. Store in an enclosed building or trailer that provides a dry, adequately ventilated environment. [Store felt rolls on ends. For

SECTION 07 22 00 Page 10 the 24 hours immediately before application of felts, store felts in an area maintained at a temperature no lower than 10 degrees C 50 degrees F above grade and having ventilation on all sides.] Replace damaged material with new material.

1.11 ENVIRONMENTAL CONDITIONS

Do not install roof insulation during inclement weather or when air temperature is below 4 degrees C 40 degrees F and interior humidity is 45 percent or greater, or when there is visible ice, frost, or moisture on the roof deck.

1.12 PROTECTION

NOTE: Wher e bui l t - up r oof i ng i s appl i ed over i nsul at i on, del et e par agr aphs FLAME HEATED EQUI PMENT t hr ough DRI PPAGE OF BI TUMEN and speci f y r equi r ement encl osed i n br acket s i n par agr aph PROTECTI ON OF PROPERTY. Del et e par agr aphs FLAME HEATED EQUI PMENT, PROTECTI VE COVERI NGS, SPECI AL PROTECTI ON, AND

DRI PPAGE OF BI TUMEN when r oof i ng syst em or i nsul at i on does not r equi r e hot asphal t or t or ches f or appl i cat i on.

[ Provide protection as specified in [_____].

][ 1.12.1 Flame Heated Equipment

1.12.1.1 Fire Protection

Locate melt kettles no closer than 8 meters 25 feet from buildings or combustible materials. Provide and maintain two approved 4-A:40-B:C fire extinguishers within 8 meters 25 feet of each operating kettle. Fire extinguishers, operations and locations must comply with NFPA 1 Section Tar Kettles. Equip asphalt (tar) kettles with tight fitting lids.

1.12.1.2 Operational Requirements

Equip kettles with automatic thermostatic control capable of maintaining asphalt temperature. Calibrate and maintain controls in working order for the duration of the work. Equip kettles with means of agitation and ensure they are operating as necessary to produce a controlled uniform temperature throughout kettle contents to prevent spot heating. Do not heat contents above flash point. Do not place flame heated equipment on the roof.

][ 1.12.2 Special Protection

Provide special protection as approved by the insulation manufacturer.

][ 1.12.3 Drippage of Bitumen

Seal joints in and at edges of deck as necessary to prevent drippage of asphalt into the building or onto adjacent surfaces.

SECTION 07 22 00 Page 11

] 1.12.4 Completed Work

Cover completed work with cover board for the duration of construction.

Avoid traffic on completed work particularly when ambient temperature is above 27 degrees C 80 degrees F . Replace crushed or damaged insulation prior to roof surface installation.

PART 2 PRODUCTS

NOTE: Speci f y sust ai nabl e mat er i al s i n accor dance wi t h UFC 1- 200- 02 HI GH PERFORMANCE AND SUSTAI NABLE BUI LDI NG REQUI REMENTS. Reduce t he envi r onment al i mpact of mat er i al s by speci f y i ng pr oduct s t hat have a l esser or r educed ef f ect on human heal t h and t he envi r onment such as l ow emi t t i ng mat er i al s and mat er i al s wi t h hi gh r ecycl ed cont ent . Consi der pr oduct l i f e cycl e and t r avel di st ances when compar ed wi t h compet i ng pr oduct s or ser vi ces ser vi ng t he same pur pose.

2.1 INSULATION

2.1.1 Insulation Types

NOTE: Speci f y al l t ypes of i nsul at i on l i s t ed as Cont r act or opt i ons, except wher e met hod of const r uct i on or speci al r equi r ement s pr ohi bi t use.

Ther mal bar r i er of gl ass mat gypsum r oof boar d or sui t abl e r oof i nsul at i on boar d must be i nst al l ed di r ect l y on r oof deck when pol yst yr ene boar d wi l l be appl i ed over decks const r uct ed of mat er i al s ot her t han pour ed- gypsum; pour ed- concr et e; nomi nal 50 mm 2 inch t hi ck, t ongue- and- gr oove wood pl ank or pr ecast r oof deck panel s; or pl anks appr oved by FM as noncombust i bl e r oof deck const r uct i on.

For NAVFAC SE pr oj ect s, do not speci f y mi ner al f i ber , gl ass f i ber or cel l ul ar gl ass boar ds.

Roof i nsul at i on shoul d be speci f i ed by t her mal r esi st ance ( R- val ue) necessar y t o obt ai n r equi r ed over al l t her mal t r ansmi t t ance ( U- val ue) needed t o sat i sf y desi gn cr i t er i a f or par t i cul ar t ype of f aci l i t y . Thi ckness of i nsul at i on wi l l var y wi t h t ype of mat er i al f ur ni shed i n or der t o pr ovi de speci f i ed R- val ue. When t hi ckness of i nsul at i ng mat er i al i s gover ned by space l i mi t at i ons or const r uct i on f eat ur es, R- val ue and cor r espondi ng t hi ckness shoul d be coor di nat ed wi t h space avai l abl e. Pr ovi de i nsul at i on of suf f i c i ent t hi ckness t o ensur e t hat t emper at ur e of vapor r et ar der sur f ace, when used, wi l l be above dewpoi nt . R- val ue f or i nsul at i on shoul d never be l ess t han R- val ue used i n desi gn of heat i ng, vent i l at i on and ai r condi t i oni ng syst ems.

SECTION 07 22 00 Page 12

NOTE: Roof const r uct i on, ai r - t o- ai r , may i ncl ude f i ni shed cei l i ngs pr ovi ded cei l i ngs ext end over t he ent i r e r oof ar ea; and t he space above t he cei l i ng i s nei t her vent ed t o t he ext er i or nor used as a r et ur n ai r pl enum. Gener al l y, r oof i nsul at i on over mechani cal r ooms does not need t o be i ncr eased i n t hi ckness when t he mechani cal r oom has no cei l i ng and t he r est of t he bui l di ng has a cei l i ng. I f desi gned r oof i nsul at i on t hi ckness var i es over mechani cal r ooms or anywher e el se i n t he bui l di ng;

conf i r m al l dewpoi nt s and coor di nat e l ocat i ons of vapor bar r i er s accor di ngl y.

Desi gner wi l l det er mi ne t he r equi r ed R- val ue and i ndi cat e on t he dr awi ngs. Coor di nat e R- val ue wi t h Ener gy Budget Anal ysi s. The R- val ue of i mper meabl e f aced i so- f oams and per meabl e f aced pol y i socyanur at e component s wi l l be cal cul at ed usi ng t he aged R- val ue of 1. 0 squar e met er K/ W ( " R" val ue 5. 56) per 25 mm 1 inch of t hi ckness; k = 0. 31 W/ m. k ( k = 0. 18) .

The R- val ue of i mper meabl e f aced ( ex. al umi num f oi l ) pol y i socyanur at e component s wi l l be cal cul at ed usi ng t he aged R- val ue of 1. 27 squar e met er k/ w ( " R" val ue

7. 2) per 25 mm 1 i nch of t hi ckness; k = 0. 24 W/ m. k ( k = 0. 14) .

Del et e f oi l - f aced boar d when r oof i ng i s s i ngl e pl y and f ul l y adher ed. Del et e pol yst yr ene and pol yst yr ene composi t e when i nsul at i on wi l l be appl i ed wi t h hot asphal t .

The r ecover ed mat er i al s cont ent l evel s speci f i ed bel ow ar e based on t he wei ght ( not t he vol ume) of t he mat er i al s i n t he i nsul at i ng cor e, excl udi ng ski ns or f aci ngs.

I nsul at i on must be a st andar d pr oduct of t he manuf act ur er and f act or y mar ked wi t h t he manuf act ur er ' s name or t r ade mar k, t he mat er i al speci f i cat i on number , t he R- val ue at 24 degr ees C, 75 degr ees F, and t he t hi ckness. Mi ni mum t hi ckness as r ecommended by t he manuf act ur er . Boar ds must be mar ked i ndi v i dual l y. The t her mal r esi st ance of i nsul at i on must not be l ess t han t he R- val ue shown on t he dr awi ngs. Excl ude chl or of l uor ocar bons ( CFC' s) i n t he i nsul at i on manuf act ur i ng pr ocess i n accor dance wi t h Sect i on 01 33 29 SUSTAI NABI LI TY

REQUI REMENTS AND REPORTI NG.

Provide one, or an assembly of a maximum of three, of the following roof insulation materials. Provide roof insulation that is compatible with attachment methods for the specified insulation and roof membrane.

NOTE: Det ai l ed i nf or mat i on concer ni ng U. S.

SECTION 07 22 00 Page 13

Envi r onment al Pr ot ect i on Agency ( EPA) r equi r ement s on r ecycl ed/ r ecover ed mat er i al s i s avai l abl e at t he f ol l owi ng URL' s:

https://www.epa.gov/smm/comprehensive-procurement-guidelines-construction-products and t hen cl i ck on t he appr opr i at e i t em f r om t he l i s t ( bui l di ng i nsul at i on, f or exampl e) :

https://www.epa.gov/smm/comprehensive-procurement-guidelines-construction-products#01 https://nepis.epa.gov/Exe/ZyPURL.cgi?Dockey=100012QF.txt whi ch opens up EPA530- R- 98- 003 ( dat ed Jul y, 1998, t i t l ed BACKGROUND DOCUMENT FOR PROPOSED CPG I I I AND

DRAFT RMAN I I I ) .

Usi ng dat a f r om l i st ed l ocat i ons, f i l l i n bl ank space ( bel ow and i n subsequent par agr aphs) f or r equi r ed per cent age of r ecycl ed or r ecover ed mat er i al . Thi s i s i n accor dance wi t h t he r equi r ement s of 40 CFR 247 and Sect i on 01 33 29 SUSTAI NABI LI TY REQUI REMENTS AND REPORTI NG, whi ch shoul d be i ncl uded i n al l pr oj ect s.

a. Expanded Perlite Board: Provide in accordance with ASTM C728. Minimum

19 mm 3/4 inch thick when both top and bottom surfaces must be in contact with asphalt.

NOTE: Del et e f oi l - f aced boar d when f ul l y adher ed, col d- appl i ed s i ngl e pl y r oof i ng i s speci f i ed.

Bl i st er i ng of r oof i ng membr anes has occur r ed over some pol yur et hane and composi t e ( pol yur et hane) boar d i nsul at i on, possi bl y due t o ei t her r el ease of gases f r om pol yur et hane, moi st ur e ent r apped i n f aci ng or pl y i ng f el t , di f f er ent i al movement bet ween r oof i ng membr ane and pol yur et hane r esul t i ng f r om t her mal st r esses on t he mat er i al s, or i nadequat e br oomi ng and moppi ng. When hot - appl i ed bui l t - up, modi f i ed bi t umen sheet , or Pol y i sobut yl ene ( PI B) sheet r oof i ng i s i nst al l ed over i nsul at i on, i t i s r ecommended t hat a t hi n l ayer of mi ner al f i ber , wood f i ber boar d, expanded per l i t e boar d i nsul at i on, or gl ass mat gypsum r oof boar d be pl aced over t he t op sur f ace of t he pol yur et hane boar d, embedded i n sol i d asphal t moppi ng wi t h j oi nt s of mi ner al f i ber , wood f i ber boar d, or per l i t e boar d, or gl ass mat gypsum r oof boar d st agger ed i n bot h di r ect i ons wi t h r espect t o t he pol yur et hane boar d bel ow. The same pr ecaut i onar y pr ocedur e shoul d be f ol l owed when pol y i socyanur at e f oam boar ds ar e speci f i ed even t hough t her e may not be document at i on of s i mi l ar pr obl ems wi t h t hese t ypes.

b. Polyisocyanurate Board: Provide in accordance with ASTM C1289 REV A [Type I, foil faced both sides] [or] [Type II, fibrous felt or glass mat membrane both sides], except minimum compressive strength of 140 kilopascal (kPa) 20 pounds per square inch (psi) .

NOTE: Del et e pol yst yr ene composi t e boar d when

SECTION 07 22 00 Page 14 i nsul at i on wi l l be appl i ed wi t h hot asphal t .

c. Composite Boards: Provide in accordance with ASTM C1289 REV A, [Type III, perlite insulation board faced on one side with fibrous felt or glass fiber mat membrane on opposite side.] [Type V, oriented strand board or waferboard on one side and fibrous felt or glass fiber mat membrane or aluminum foil on opposite side (Polyisocyanurate-perlite).]

d. Cellular Glass Boards: ASTM C552, Type IV.

NOTE: Del et e non- composi t e pol yst yr ene boar d when i nsul at i on wi l l be appl i ed wi t h hot asphal t or used under hot asphal t - appl i ed r oof i ng. Thi s t ype of i nsul at i on i s sensi t i ve t o hot asphal t , var i ous sol vent s, and cer t ai n s i ngl e pl y r oof i ng membr anes.

NOTE: Expanded or ext r uded pol yst yr ene i nsul at i on boar d i s f l exi bl e enough f or use on ar ched r oof s.

For t hi s appl i cat i on, each l ayer must be t hi n enough t o per mi t t he r equi r ed bendi ng and each l ayer must be mechani cal l y f ast ened. Check i ndi v i dual manuf act ur er r equi r ement pr i or t o appl i cat i on.

NOTE: Consi der Pol yst yr ene as a r oof i nsul at i on 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. 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.

Pol yst yr ene has a hi gh heat r esi st ance ( R) val ue, i s dense enough f or f oot t r af f i c , and wi l l not absor b wat er . Foam gl ass has hi gher i ni t i al cost , t her ef or e i t i s not of t en used as a r oof i nsul at i on.

[ e. Polystyrene Board: In accordance with ASTM C578 REV A, Type II, IV, or X.

NOTE: Speci f y hi gh densi t y t ype wood f i ber boar d wher e t he boar d i s used as an over l ayment and f ul l y adher ed si ngl e pl y r oof i ng i s speci f i ed.

NOTE: Gr ade 1 i nsul at i ng boar d i s pr i mar i l y f or use under bui l t - up r oof syst ems. Gr ade 2 boar d i s pr i mar i l y f or use under s i ngl e pl y r oof syst ems.

NOTE: Do not use wood f i ber boar d as a r oof

SECTION 07 22 00 Page 15 i nsul at i on 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. 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.

Fi ber boar d wi l l absor b, conduct , and hol d wat er . I t swel l s when wet and det er i or at es. As a r esul t , t he r oof i ng syst em may bl ow of f when subj ect ed t o hi gh winds.

[ f. Wood Fiberboard: In accordance with ASTM C208[, high density], except 1220 by 1220 mm 4 by 4 feet maximum board size.

ASTM C208 Type II, Grade 1 or 2, roof insulating board, treated with sizing, wax or bituminous impregnation. Limit bituminous impregnation to 4 percent by weight when used over steel decks. Maximum board size: 1220 by 1220 mm 4 feet by 4 feet .

] 2.1.2 Mineral Fiber Insulation Board

Provide in accordance with ASTM C726.

2.1.3 Recycled Materials

Provide thermal insulation materials containing recycled content. Unless specified otherwise, the minimum required recycled content for listed materials are:

Perlite Composition Board: 75 percent postconsumer paper

Polyisocyanurate/polyurethane: 9 percent recovered material

Wood Fiberboard: 100 percent recovered material

Cellular Glass Insulation: 75 percent recovered content

Structural Fiberboard: 100 percent recovered content

Fiberglass Insulation: 25 percent recovered content

Fiber (felt) or Fiber composite: 75 percent recovered content

Rubber: 90 percent recovered content

Plastic or Plastic/Rubber composite: 90 percent recovered content

Wood/Plastic Composite: 90 percent total recovered content

Provide data identifying percentage of recycled content for insulation .

2.1.4 Indoor Air Quality

Provide certification of indoor air quality for insulation .

SECTION 07 22 00 Page 16

2.1.5 Insulation Thickness

As necessary to provide the thermal resistance (R-value) indicated[ for average thickness of tapered system]. Base calculation on the R-value for aged insulation.[ For insulation over steel decks, satisfy both specified R-value and minimum thickness for width of rib opening recommended in insulation manufacturer's published literature].

[ 2.1.6 Tapered Roof Insulation

NOTE: Wher e t aper ed r oof i nsul at i on i s used on a subst r at e s l oped 1 i n 48 ( 20 mm per 1 M) ( 1/ 4 i nch per f oot ) and gr eat er , i nsul at i on havi ng a s l ope of 1 i n 48 ( 20 mm per 1 M) ( 1/ 4 i nch per f oot ) may be speci f i ed. Ot her wi se, speci f y t aper ed i nsul at i on havi ng a s l ope of 1 i n 24 ( 40 mm per 1 M) ( 1/ 2 i nch per f oot ) .

One layer of the tapered roof insulation assembly must be factory tapered to a slope of not less than one in [24] [48] [20 mm] [40 mm] per 1 M [1/4] [1/2] inch per foot . Factory fabricate mitered joints from two diagonally cut boards or one board shaped to provide required slopes.

][ 2.1.7 Cants and Tapered Edge Strips

NOTE: Gener al l y cant st r i ps ar e not r equi r ed f or s i ngl e pl y r oof i ng syst ems. However , i f cant st r i ps ar e necessar y, coor di nat e t hei r l ocat i on wi t h mechani cal dr awi ngs t o ensur e t hat no pr oj ect i ons, such as vent pi pes and br aces, wi l l be const r uct ed t hr ough cant st r i ps or wi t hi n 250 mm 10 i nches f r om t hem. Speci f y wood cant s, edge st r i ps, and pr essur e pr eser vat i ve t r eat ment i n Sect i on 06 10 00 ROUGH

CARPENTRY.

Provide preformed cants and tapered edge strips of the same material as the roof insulation. When unavailable, provide pressure-preservative treated wood, wood fiberboard, or rigid perlite board cants and edge strips as recommended by the roofing manufacturer for the specific application, unless otherwise indicated. Face of cant strips to incline at 45 degrees with a minimum vertical height of 100 mm 4 inches . Taper edge strips at a rate of 85 to 125 mm per meter one to 1 1/2 inch per foot down to approximately 3 mm 1/8 inch thick.

] [ 2.2 COVER BOARD

For use as a thermal barrier (underlayment), fire barrier (overlayment), or cover board for hot-mopped, torched-down, or adhesive-applied roofing membrane over roof insulation.

[ 2.2.1 Glass Mat Gypsum Roof Board

NOTE: Speci f y gl ass mat gypsum r oof boar d as a Cont r act or ' s opt i on t o wood f i ber boar d, expanded

SECTION 07 22 00 Page 17 per l i t e, or ot her sui t abl e mat er i al , when an under l ayment or over l ayment i s r equi r ed f or t he r oof i nsul at i on boar d.

ASTM C1177/C1177M , 0 Flame Spread and 0 Smoke Developed when tested in accordance with ASTM E84, 3450 kPa 500 psi , Class A, non-combustible, [6][13][16] mm [1/4][1/2][5/8] inch thick, 1220 by 2440 mm 4 by 8 feet board size.

][ 2.2.2 High Density Wood Fiber

Provide high density fiber board, Grade 2 in accordance with ASTM C208 with a transverse load of 53.4 N 12 lbf .

] ][ 2.3 BITUMENS

NOTE: Wher e i nsul at i on i s i nst al l ed under r oof i ng t hat does not r equi r e hot asphal t and vapor r et ar der i s not r equi r ed, del et e asphal t , asphal t r oof cement , asphal t - sat ur at ed f el t , asphal t - coat ed gl ass f el t , and asphal t pr i mer s. Al ways mechani cal l y secur e f i r st l ayer of i nsul at i on t o st eel decks.

For i nst al l at i on over st eel and ot her decks not r equi r i ng vapor r et ar der s or wher e asphal t i s not used i n i nst al l i ng i nsul at i on, speci f y onl y mechani cal f ast eni ng of i nsul at i on. Coor di nat e r equi r ement s of t hi s sect i on wi t h sect i on speci f y i ng t he r oof i ng.

[ 2.3.1 Asphalt Primer

Provide in accordance with ASTM D41/D41M.

][ 2.3.2 Asphalt

Provide in accordance with ASTM D312, Type III or IV. Asphalt flash point, finished blowing temperature, and equiviscous temperature (EVT) for mop and mechanical spreader application must be indicated on each container.

][ 2.3.3 Asphalt Roof Cement

Provide in accordance with ASTM D4586/D4586M , Type I, for horizontal surfaces and surfaces sloped from 0 by 76 mm per 1 M 0 to 3 inches per foot. Type II for vertical and surfaces sloped more than 76 mm per 1 M 3 inches per foot.

] ][ 2.4 SHEATHING PAPER FOR WOOD DECKS

Rosin-sized building paper or unsaturated felt weighing not less than 2.5 kilograms per 10 square meters 5 pounds per 100 square feet .

] 2.5 MOISTURE CONTROL

NOTE: Vapor r et ar der shoul d be speci f i ed onl y wher e:

SECTION 07 22 00 Page 18

1. Out si de, aver age Januar y t emper at ur e i s bel ow 4 degr ees C 40 degr ees F, and expect ed wi nt er i nt er i or r el at i ve humi di t y i s 45 per cent or gr eat er ;

2. Roof i ng syst em wi l l be subj ect t o cont i nui ng excessi vel y hi gh i nt er i or humi di t y; and

3. Resul t s of det ai l ed anal ysi s i ndi cat e pot ent i al r oof i ng pr obl em r esul t i ng f r om wat er - vapor infiltration.

Del et e Cont r act or ' s opt i on f or s i ngl e- l ayer vapor r et ar der f or r oof s over ar eas havi ng excessi vel y hi gh i nt er i or humi di t y such as swi mmi ng pool s and l aundr i es. Gener al l y, vapor r et ar der shoul d be i n di r ect cont act wi t h deck. However , comput e dewpoi nt t emper at ur e and l ocat i on and l ocat e vapor r et ar der bel ow dewpoi nt l ocat i on. Avoi d use of vapor r et ar der over st eel decks unl ess vapor r et ar der i s det er mi ned t o be absol ut el y necessar y. Do not speci f y wood f i ber boar d or any t ype of i nsul at i on t hat i s hi ghl y sensi t i ve t o moi st ur e f or l ayer di r ect l y on st eel deck. Speci f y i nst al l at i on of i nsul at i on over vapor r et ar der usi ng hot asphal t t o avoi d punct ur i ng vapor r et ar der . Combi nat i on of t wo or mor e l ayer s of i nsul at i on shoul d be of such t hi ckness t hat dewpoi nt t emper at ur e wi l l occur above vapor r et ar der l ocat ed di r ect l y over f i r st l ayer of i nsul at i on. Topsi de vent i ng shoul d al ways be pr ovi ded by i nsul at i on vent s and per i met er edge vent s when vapor r et ar der i s used. Speci f y vent i ng r equi r ement s i n r oof i ng membr ane speci f i cat i on section.

Unl ess ot her wi se di r ect ed, do not speci f y vapor r et ar der f or pr oj ect s i n t he NAVFAC SE ar ea.

[ 2.5.1 Vapor Retarder

[ 2.5.1.1 Asphalt Saturated Felt Base Sheet for Single Layer Application

Provide in accordance with ASTM D4601/D4601M , weighing not less than 17.5 kilograms per 10 square meters 35 pounds per 100 square feet .

][ 2.5.1.2 Asphalt-Coated Glass Felt

Provide in accordance with ASTM D2178/D2178M , Type [IV] [VI].

] ][ 2.5.2 Ventilating Felt for [Poured] [Precast] Concrete Decks

NOTE: Speci f y vent i l at i ng f el t f or new and exi st i ng concr et e decks suspect ed of havi ng r et ai ned moi st ur e t o ai d i n di ssi pat i on of any moi st ur e r et ai ned i n concr et e. Do not consi der t hi s a vapor r et ar der .

SECTION 07 22 00 Page 19

Provide in accordance with ASTM D4897/D4897M , Type II, non-perforated, with spot mopping holes where specified.

] 2.5.3 Organic Roofing

Provide in accordance with ASTM D226/D226M, Type I.

2.6 FASTENERS

Provide flush-driven fasteners through flat round or hexagonal steel or plastic plates. Provide zinc-coated steel plates, flat round not less than 35 mm 1 3/8 inch diameter, hexagonal not less than 0.4 mm 28 gage .

Provide high-density plastic plates, molded thermoplastic with smooth top surface, reinforcing ribs and not less than 75 mm 3 inches in diameter.

Fully recess fastener head into plastic plate after it is driven. Form plates to prevent dishing. Do not use bell or cup shaped plates. Provide fasteners in accordance with insulation manufacturer's recommendations for holding power when driven, or a minimum of [ 178 N 40 pounds ] [ 534 N 120 pounds ] each in steel deck, whichever is the higher minimum. Provide fasteners for steel or concrete decks in accordance with FM APP GUIDE ( http://www.approvalguide.com/ ) for Class I roof deck construction, and spaced to withstand uplift pressure of [2.87] [4.3] [_____] kPa [60] [90] [_____] pounds per square foot .

2.6.1 Roofing Nails for Wood Decks

Barbed 3 mm 11 gage , zinc-coated nails with 11 to 16 mm 7/16 to 5/8 inch diameter heads or annular ring shank, square head, one piece composite nails. Provide nails long enough to penetrate wood deck at least 16 mm 5/8 inch without protruding through underside of decking.

2.6.2 Fasteners for Plywood Decks

Annular ring shank, square head, one piece composite nails long enough to penetrate into plywood decks approximately 13 mm 1/2 inch without protruding through underside of decking.

2.6.3 Fasteners for Steel Decks

Approved hardened penetrating fasteners or screws in accordance with FM 4450 and listed in FM APP GUIDE for Class I roof deck construction.

Quantity and placement to withstand a minimum uplift pressure of [2.87] [4.31] [_____] kPa [60] [90] [_____] psf in accordance with FM APP GUIDE.

2.6.4 Fasteners for Poured Concrete Decks

Approved hardened fasteners or screws to penetrate deck at least 25 mm 1 inch but not more than 38 mm 1 1/2 inches , in accordance with FM 4470 , and listed in FM APP GUIDE for Class I roof deck construction. Quantity and placement to withstand an uplift pressure of [2.87] [4.31] [_____] kPa [60] [90] [_____] psf in accordance with FM APP GUIDE.

2.7 WOOD NAILERS

NOTE: When r oof s l ope exceeds 1 i n 24 ( 40 mm i n 1 M) ( 1/ 2 i nch per f oot ) , i nsul at i ng mat er i al s beneat h bui l t - up r oof i ng shoul d be bot h mopped and hel d i n pl ace by t r eat ed wood nai l er s. Non- nai l abl e decks

SECTION 07 22 00 Page 20 shoul d be pr ovi ded wi t h sur f ace- appl i ed nai l i ng st r i ps of same t hi ckness as i nsul at i on. See bui l t - up bi t umi nous r oof i ng speci f i cat i ons f or r equi r ement s on nai l i ng of r oof i ng f el t s. For al l i nsul at ed r oof decks, t r eat ed wood nai l er s shoul d be appl i ed at eave edgi ngs and si des of r oof s and ar ound cur bs and el sewher e as necessar y t o pr ovi de nai l i ng f or gr avel st ops and f l ashi ngs. Ref er t o FM Dat a Sheet s f or met hod of at t achment of nai l er s. A wat er - bor ne pr eser vat i ve t r eat ment shoul d be speci f i ed i n Sect i on 06 10 00 ROUGH CARPENTRY f or wood whi ch wi l l be i n cont act wi t h bi t umi nous materials.

Pressure-preservative treated as specified in Section 06 10 00 ROUGH

CARPENTRY.

PART 3 EXECUTION

3.1 EXAMINATION AND PREPARATION

3.1.1 Surface Inspection

NOTE: Unl ess ot her wi se di r ect ed, do not r ef er t o vapor r et ar der s f or pr oj ect s i n t he NAVFAC SE ar ea.

Vapor r et ar der may be speci f i ed f or heat ed bui l di ngs wher e t he aver age Januar y t emper at ur e i s bel ow 5 degr ees C 40 degr ees F and t he expect ed i nt er i or wi nt er humi di t y exceeds 45 per cent . Vapor r et ar der wi l l be speci f i ed f or heat ed bui l di ngs wher e a hi gh humi di t y condi t i on i s expect ed, such as i ndoor swi mmi ng pool or l aundr y.

Wher e a vapor r et ar der i s t o be i nst al l ed, t he desi gner wi l l make sur e t hat t he comput at i ons show t hat t he dew poi nt i s on t he col d s i de of t he vapor r et ar der . Comput at i ons shoul d use r ecogni zed met hods i n agr eement wi t h ASHRAE Handbook, Fundamentals.

Ensure surfaces are clean, smooth, and dry prior to application. [Ensure surfaces receiving vapor retarder are free of projections that might puncture the vapor retarder.] Check roof deck surfaces, including surfaces sloped to roof drains and outlets, for defects before starting work.

The [Contractor must] [Contracting Officer will] inspect and approve the surfaces immediately before starting installation. Prior to installing [vapor retarder] [ventilating felt] [insulation], perform the following:

[ a. Examine wood decks to ascertain that deck boards have been properly nailed and that exposed nail heads have been set.

][ b. Examine steel decks to ensure that panels are properly secured to structural members and to each other and that surfaces of top flanges are flat or slightly convex.

SECTION 07 22 00 Page 21

][ c. Examine precast concrete decks to ensure that joints between precast units are properly grouted and leveled to provide suitable surfaces for installation of [ventilating felt] [vapor retarder] [and] insulation.

][ d. In the presence of the Contracting Officer perform the following surface dryness test on concrete substrates:

(1) Foaming: When poured on the deck, one pint of asphalt when heated in the range of 176 to 204 degrees C 350 to 400 degrees F , does not foam upon contact.

(2) Strippability: After asphalt used in the foaming test application has cooled to ambient temperatures, test coating for adherence.

Should a portion of the sample be readily stripped clean from surface, do not consider surface to be dry and do not start application. Should rain occur during application, stop work and do not resume until surface has been re-tested by method above and found dry.

][ e. Prior to installing any roof system on a concrete deck, moisture test the deck in accordance with ASTM D4263. The deck is acceptable for roof system application when there is no visible moisture on underside of plastic sheet after 24 hours.

] 3.1.2 Surface Preparation

Correct defects and inaccuracies in roof deck surface to eliminate poor drainage from hollow or low spots, perform the following:

a. Provide wood nailers of the same thickness as the insulation at eaves, edges, curbs, walls, and roof openings for securing of cant strips, gravel stops, [gutters,] and flashing flanges. [On decks with slopes of one in 12 (80 mm per 1 M) (1 inch per foot) or more, install wood nailers perpendicular to slope for securing insulation [and for backnailing of roofing felts]. Space nailers in accordance with approved shop drawings.]

[ b. Fill or cover cracks or knot holes larger than 13 mm 1/2 inch in diameter in wood decks as necessary to form an unyielding surface.

NOTE: I ncl ude t he f ol l owi ng r equi r ement s when a vapor r et ar der i s r equi r ed over wood deck or when i nsul at i on i s appl i ed di r ect l y t o t he wood deck wi t h hot asphal t .

[ c. Cover wood decks with a layer of rosin-sized building paper or unsaturated felt. Lap sides and ends not less than 75 mm 3 inches .

Nail sufficiently to prevent tearing or buckling during installation.

][ d. Cover steel decks with a layer of insulation board of sufficient width to span the width of a deck rib opening, and in accordance with fire safety requirements. Secure with piercing or self-drilling, self-tapping fasteners of quantity and placement in accordance with FM APP GUIDE. Locate insulation joints parallel to ribs of deck on solid bearing surfaces only, not over open ribs.

SECTION 07 22 00 Page 22

][ e. Solidly apply asphalt primer to [poured] [precast] concrete decks at the rate of 4 liters per 10 square meters 1 gallon per 100 square feet of roof surface [, stopping approximately 100 mm 4 inches from joints between precast concrete units]. Allow primer to dry thoroughly.

[Place felt strips, 100 mm 4 inches or more in width, over joints, 50 mm 2 inches on each side, between precast concrete units in a heavy coating of cold-applied asphalt roof cement.]

] 3.2 INSTALLATION OF VAPOR RETARDER

NOTE: Unl ess di r ect ed ot her wi se, do not speci f y a vapor r et ar der f or pr oj ect s i n t he NAVFAC SE ar ea.

Vapor r et ar der may be speci f i ed f or heat ed bui l di ngs wher e t he aver age Januar y t emper at ur e i s bel ow 5 degr ees C ( 40 degr ees F) and t he expect ed i nt er i or wi nt er humi di t y exceeds 45 per cent . Vapor r et ar der wi l l be speci f i ed f or heat ed bui l di ngs wher e a hi gh humi di t y condi t i on i s expect ed, such as i ndoor swi mmi ng pool or l aundr y.

Wher e a vapor r et ar der i s t o be i nst al l ed, t he desi gner wi l l make sur e t hat t he comput at i ons show t hat t he dew poi nt i s on t he col d s i de of t he vapor r et ar der . Comput at i ons shoul d use r ecogni zed met hods i n agr eement wi t h ASHRAE Handbook, Fundamentals.

Install vapor retarder in direct contact with [roof deck surface] [ventilating felt] [insulation].