A.07.24_W9127N-17-B-0004_Amendment_0003.pdf

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.

15A. NAME AND TITLE OF SIGNER (Type or print)

30-105-04EXCEPTION TO SF 30

APPROVED BY OIRM 11-84

STANDARD FORM 30 (Rev. 10-83) Prescribed by GSA

FAR (48 CFR) 53.243

PROJECT TITLE: BONNEVILLE POWERHOUSE 2 ROOF REPLACEMENT

SEE ATTACHED PAGES

1. CONTRACT ID CODE PAGE OF PAGES

J 1 2

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

16C. DATE SIGNED

BY 30-Mar-2017

16B. UNITED STATES OF AMERICA15C. DATE SIGNED15B. CONTRACTOR/OFFEROR

(Signature of Contracting Officer)(Signature of person authorized to sign)

8. NAME AND ADDRESS OF CONTRACTOR (No., Street, County, State and Zip Code) X W9127N-17-B-0004

X 9B. DATED (SEE ITEM 11)

28-Feb-2017

10B. DATED (SEE ITEM 13)

9A. AMENDMENT OF SOLICITATION NO.

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

X The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offer is extended, X is not extended.

Offer must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended by one of the following methods:

(a) By completing Items 8 and 15, and returning 1 copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN

REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

12. ACCOUNTING AND APPROPRIATION DATA (If required)

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS.

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE

CONTRACT ORDER NO. IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(B).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority)

E. IMPORTANT: Contractor is not, is required to sign this document and return copies to the issuing office.

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

10A. MOD. OF CONTRACT/ORDER NO.

2. AMENDMENT/MODIFICATION NO. 5. PROJECT NO.(If applicable)

6. ISSUED BY

3. EFFECTIVE DATE

30-Mar-2017

CODE

USACE PORTLAND DISTRICT

333 SW 1ST AVE

PORTLAND OR 97204-3440

W9127N 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

W9127N-17-B-0004

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

The following items are applicable to this modification:

AMENDMENT NO. 0003

This Amendment is issued to revise the following:

1. Division 01 – General Requirements:

- Section 01 11 13.00 25 Paragraph 1.4.10.1(a) has been revised.

- Section 01 11 13.00 25 Paragraph 1.4.17.4 has been revised.

2. Division 03 – Concrete:

- Section 03 52 00.00 28 Paragraph 1.9.2 has been updated.

3. Division 07 – Thermal and Moisture Protection:

- Section 07 53 23.00 28 has been replaced in its entirety.

4. Drawings:

- A-501 has been revised.

- A-506 has been revised.

5. The Davis-Bacon Wage Determination has been updated from WA40 (Modification 1 dated 02/03/2017) to WA40 (Modification 2 dated 03/10/2017).

6. All other terms and conditions remain unchanged.

Bonneville Second Powerhouse Roof Replacement

PROJECT TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

01 11 13.00 25 GENERAL CONTRACT REQUIREMENTS

01 33 00 SUBMITTAL PROCEDURES

01 35 26.00 25 GOVERNMENTAL SAFETY REQUIREMENTS

01 42 00 SOURCES FOR REFERENCE PUBLICATIONS

DIVISION 02 - EXISTING CONDITIONS

02 82 14.00 28 ASBESTOS CONTAINING MATERIAL (ACM) REMOVAL AND DISPOSAL

DIVISION 03 - CONCRETE

03 52 00.00 28 LIGHTWEIGHT CONCRETE ROOF INSULATION

DIVISION 05 - METALS

05 30 00.00 28 STEEL DECKS

DIVISION 06 - WOOD, PLASTICS, AND COMPOSITES

06 82 14.00 28 FALL PROTECTION

DIVISION 07 - THERMAL AND MOISTURE PROTECTION

07 01 50.10 28 REMOVAL AND DISPOSAL

07 21 16.00 28 MINERAL FIBER BLANKET INSULATION

07 22 00.00 28 ROOF INSULATION

07 53 23.00 28 ETHYLENE-PROPYLENE-DIENE-MONOMER ROOFING

07 61 00.00 28 SHEET METAL FLASHING

07 72 00.00 28 ROOF ACCESSORIES

07 84 00.00 28 FIRESTOPPING

07 92 00.00 28 JOINT SEALANTS

DIVISION 09 - FINISHES

09 22 16.00 28 NON-STRUCTURAL METAL FRAMING

-- End of Project Table of Contents --

PROJECT TABLE OF CONTENTS Page 1

SECTION TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

SECTION 01 11 13.00 25

GENERAL CONTRACT REQUIREMENTS

PART 1 GENERAL

1.1 REFERENCES

1.2 SUBMITTALS

1.3 CONTRACT ADMINISTRATION DATA

1.3.1 Meaning of Terms

1.3.2 Contracting Officer

1.3.3 Serial Letter Correspondence

1.3.3.1 Numbering

1.3.3.2 Subcontractors

1.3.3.3 Transmittals

1.3.3.4 Letters of Authority

1.3.4 EM 385-1-1 Safety and Health Requirements Manual

1.3.5 Contractor Performance Evaluations

1.3.6 Labor Standards

1.3.7 Coverage

1.3.8 Wages

1.3.9 Overtime

1.3.10 Deductions

1.3.11 Subcontracts

1.3.12 Payrolls

1.3.13 Apprentices

1.3.14 Equal Opportunity

1.3.15 Records

1.3.16 Job Interviews

1.3.17 Work Stoppage

1.3.18 Drawings

1.4 CONTRACTOR'S OPERATIONS AND REQUIREMENTS

1.4.1 Interim Construction Completion Dates

1.4.2 Schedule for Construction

1.4.3 Inclement Weather Construction

1.4.4 Permits and Responsibilities

1.4.5 Utility Outage or Utility Connection Request

1.4.5.1 Utility Outages of the 230-kV Transmission Lines

1.4.5.2 Utility Outage of the 480-V Crane Bus

1.4.6 Existing Site Conditions

1.4.7 Preconstruction Meeting

1.4.8 Weekly Coordination Meetings

1.4.9 Contractor Employees

1.4.10 Access Agreements and Work Areas

1.4.10.1 Work Plan

1.4.10.2 Identification of Contractor Vehicles

1.4.10.3 Employee Access and Parking

1.4.10.4 Public Access

1.4.11 Security Procedures

1.4.11.1 Project Security

1.4.11.2 Contractor's General Personnel

1.4.11.3 Verification of Employment Eligibility

SECTION 01 11 13.00 25 Page 1

1.4.11.4 Identification of Employees

1.4.11.5 Non-US Citizens

1.4.12 Security Training

1.4.13 Supplemental Security Requirements

1.4.13.1 7 Year Criminal Background Check

1.4.13.2 NERC Critical Infrastructure Protection (CIP) Training

1.4.13.3 Quarterly Security Awareness Programs

1.4.13.4 Escorted Powerhouse Access

1.4.14 Deck Access Restrictions

1.4.15 Roof Access Restrictions

1.4.16 Emergency Siren Lockout

1.4.17 Utilities

1.4.17.1 Sanitary Facilities

1.4.17.2 Electrical Power

1.4.17.3 Telephone

1.4.17.4 Water

1.4.18 Contractor's Equipment

1.4.18.1 Contractor's Planned Equipment Methods

1.4.18.2 Plant and Equipment List

1.4.18.3 Movement of Equipment by the Contractor

1.4.18.4 Contractor Use of Government Cranes

1.4.19 Cranes and Heavy Equipment

1.4.19.1 General

1.4.19.2 Contractor's Cranes and Heavy Equipment

1.4.19.3 Construction Elevators

1.4.20 Gas, Vapor, Fume, Dust, and Mist Control in Powerhouse

1.4.21 Noise Control

1.4.22 Use of Explosives

1.4.23 Disposition of Materials

1.4.23.1 Daily Cleanup and Disposal

1.4.23.2 Disposal of Equipment and Miscellaneous Materials

1.4.24 Care of Drains

1.4.25 Lead Based Paint

1.4.26 Asbestos Containing Material (ACM)

1.4.27 Protection of Material, Work, and Existing Utilities

1.5 SUMMARY OF WORK

1.5.1 Project Description

1.5.2 Location

1.5.3 Interim Construction Completion Date

1.6 MEASUREMENT AND PAYMENT

1.6.1 Unit Price Payment Items

1.6.2 Job Payment Items

1.6.3 Mobilization and Demobilization, CLIN 0001

1.6.4 Demolition & Disposal of Existing Powerhouse Roof, CLIN 0002

1.6.5 Powerhouse Roof Asbestos Abatement, CLIN 0003.

1.6.6 Install New Powerhouse Roof, CLIN 0004

1.6.7 Install New Powerhouse Roof Guardrails, CLIN 0005

1.6.8 Demolition & Disposal of Existing Visitors Center Roof and

Bridge Roof, CLIN 0006

1.6.9 Visitors Center Roof and Bridge Roof Asbestos Abatement, CLIN

0007.

1.6.10 Install New Visitors Center Roof and Bridge Roof, CLIN 0008

1.6.11 Install New Visitors Center Roof and Bridge Roof Guardrails, CLIN 0009

1.7 GOVERNMENTAL SAFETY REQUIREMENTS

1.8 QUALITY CONTROL

1.8.1 Payment

1.8.2 Project Superintendent

1.8.3 Quality Control System

SECTION 01 11 13.00 25 Page 2 of tools, supplies, equipment, and techniques necessary to competently perform the work. All personnel employed by the Contractor must be fully qualified in their respective fields to render the services necessary.

1.4.10 Access Agreements and Work Areas

Submit access procedures to and from the work site. Closure of existing roadways will not be allowed unless coordinated and approved by the Government. Provide flaggers, signs, lights, and/or other safeguards to safely control traffic when operating on or crossing access roads, arterial roads, or highways. Damage to all roads caused by the Contractor's operations must be repaired to pre-construction conditions at the expense of the Contractor.

1.4.10.1 Work Plan

a. Provide drawing(s) showing the layout of proposed area for use.

Only Contractor and subcontractor parts trailers and lunch trailers, adequately and physically anchored to prevent overturning, may be allowed in the Contractor work areas and these will be subject to CO and Project approval. No potable water supply is available at the Project site. Non-potable water is available via 1.5" water supply lines at the powerhouse downstream face for each main unit. Water use and availability must be coordinated with the COR and may not cross or block the tailrace roadway.

b. Electrical supply for Contractor trailers varies by staging location and proximity to the Second Powerhouse. One 480V, 200 Amp, 3-Phase, high resistance ground are available at the southwest corner of the Second Powerhouse. Three 480V, 60 Amp, high resistance ground connections are available - two are located at the southwest corner and the third is located near the erection bay overhead door of the Second Powerhouse. Additionally 120V, 20 Amp connections are available along the west face of the Second Powerhouse at regular intervals. Contractor must provide transformers. Details listed here are for information only. Contractor to verify with Project and Contracting Officer the availability and operability of electrical supply connections prior to utilizing. Submit temporary electrical plan in accordance with Paragraph 1.4.17.2, Electrical Power.

c. Site Restoration - Restore access roads and work area to pre-construction conditions. Including, but not limited to:

(1) Fill - General backfill must consist of non-plastic, non-organic, free-draining, Granular Material. Particles retained on a No. 4 sized sieve, per ASTM C136, must be angular to sub-angular and of uniform density. General backfill must be free of organics, deleterious materials, and contain no particles greater than 3 inches in diameter. Backfill must be approved by the Contracting Officer.

(2) Topsoil - Topsoil must be free of sticks, stones, roots, plants, weeds, and other debris and objectionable materials.

After areas have been brought to indicated finish grade, incorporate soil conditioners into soil a minimum depth of 6 inches by disking, harrowing, tilling, or other method approved by CO in accordance with ASTM D5268.

(3) Seed - Local native seed stock source, State-certified seed of

SECTION 01 11 13.00 25 Page 14

c. Performance of Electrical Work - Work by the Contractor will not be permitted within a 20 foot radius of energized transmission lines except as detailed within the contract drawings. Utility outages must be coordinated and requested in accordance with paragraph 1.4.5, Utility Outage or Utility Connection Request. When work requires Contractor to work near energized circuits as defined by the NFPA 70 or EM 385-1-1, personnel must use personal protective equipment that includes, as a minimum, electrical hard hat, safety shoes, insulating gloves with leather protective sleeves, fire retarding shirts, coveralls, face shields, safety glasses, and arc flash protection.

Portable extension cords must meet the requirements of EM 385-1-1, NFPA 70E, and OSHA electrical standards.

1.4.17.3 Telephone

Telephone will not be available for Contractor use.

1.4.17.4 Water

The Government will not provide drinking water/handwashing water for Contractor personnel working on the project. Reference Paragraph 1.4.10.1 of this section for availability of non-potable water.

1.4.18 Contractor's Equipment

Within seven calendar days prior to commencing site operations, provide a complete list of all plant and equipment to be used on the job site, exclusive of shop equipment.

1.4.18.1 Contractor's Planned Equipment Methods

Submit proposed methods of transportation and operation of cranes and other heavy equipment for approval prior to commencement of those operations.

Include the type, size, and loadings of equipment, and the proposed transportation routes and work areas to be used on the project. All cranes, rigging, lifts, operators, vehicles, and other necessary means to move equipment or items must be Contractor-furnished as required to pursue and complete the work and must comply with and tested in accordance with EM 385-1-1. Crane testing must be witnessed by the CO, provide 48 hours of notice prior to test.

1.4.18.2 Plant and Equipment List

Within seven calendar days prior to commencing site operations, provide a complete list of all plant and equipment to be used on the job site, exclusive of shop equipment. Throughout the life of the Contract, submit an up-to-date plant and equipment list with each progress payment request.

Include rented equipment as well as lease purchase or sale leaseback equipment on the lists. Initial list and the revised monthly lists must indicate dates equipment is assigned to or removed from the project;

deadline dates for repairs and returned for use; dates of the most recent and planned inspections; and adequate identification or description of each item of equipment including manufacturer's name (abbreviated), model number, manufacturer's serial number, year of manufacture, and Contractor's assigned serial or record number.

1.4.18.3 Movement of Equipment by the Contractor

a. Unless otherwise noted, any vehicle crossing a project bridge is

SECTION 01 11 13.00 25 Page 22

DIVISION 03 - CONCRETE

SECTION 03 52 00.00 28

LIGHTWEIGHT CONCRETE ROOF INSULATION

PART 1 GENERAL

1.1 REFERENCES

1.2 QUALIFICATIONS OF APPLICATOR

1.3 SUBMITTALS

1.4 DELIVERY AND STORAGE

1.5 ENVIRONMENTAL CONDITIONS

1.5.1 Normal Conditions

1.5.2 Cold Weather Conditions

1.5.3 Precipitation

1.6 PERFORMANCE REQUIREMENTS

1.6.1 UL Fire-Resistance Listing

1.7 SAFETY AND HEALTH REQUIREMENTS

1.8 QUALITY ASSURANCE

1.8.1 Fabricator's Compatibility Certificates

1.8.2 Qualification of Applicator

1.8.3 Wind Uplift Resistance

1.9 WARRANTY

1.9.1 Sample Warranty

1.9.2 Insulation System Warranty

PART 2 PRODUCTS

2.1 PORTLAND CEMENT

2.2 VERMICULITE AGGREGATE

2.3 AIR-ENTRAINMENT

2.4 FOAMING AGENTS

2.5 WATER

2.6 EXPANSION JOINT FILLER MATERIAL

2.7 WELDED WIRE FABRIC

2.8 INSULATION BOARD

2.9 ADMIXTURES

PART 3 EXECUTION

3.1 PERFORMANCE REQUIREMENTS

3.1.1 Minimum Compressive Strength

3.1.2 Minimum Oven Dry Density

3.2 SURFACE PREPARATION

3.3 INSTALLATION OVER STEEL ROOF DECKING

3.4 REINFORCING MESH OR WELDED WIRE FABRIC

3.5 APPLICATION OF INSULATING CONCRETE AND INSULATION BOARD

3.5.1 Mixing

3.5.2 Conveying

3.5.3 Expansion Joints

3.5.4 Slurry Coat and Insulation Board

SECTION 03 52 00.00 28 Page 1

1.8.3 Wind Uplift Resistance

The complete lightweight concrete roof insulation system assembly must be rated and installed to resist wind loads calculated in accordance with ASCE 7 and validated by uplift resistance testing in accordance with Factory Mutual (FM) test procedures. Do not install non-rated systems except as approved by the Contracting Officer. Submit licensed engineer's wind uplift calculations and substantiating data to validate any non-rated roof system. Base wind uplift measurements based on a design wind speed of 115 mph in accordance with ASCE 7 and/or other applicable building code requirements. Submit the lightweight concrete roof insulation system assembly wind uplift classification listings.

1.9 WARRANTY

1.9.1 Sample Warranty

Submit sample warranty for the lightweight concrete roof insulation system meeting the specified warranty requirements. Sample warranty must be submitted and approved by the Government prior to commencement of roof work.

1.9.2 Insulation System Warranty

Furnish the insulation system manufacturer’s 20-year labor and materials warranty. The insulation system warranty must include the composite roof deck system consisting of pregenerated foam and polystyrene insulation panels. All repair or replacement costs covered under the warranty must be borne by the insulation system manufacturer. The warranty must be a term type, without deductibles or limitations on coverage amount, and be issued at no additional cost to the Owner. Specific items covered during the term of the insulation system warranty include:

a. The actual resistance to heat flow through the roof insulation must be at least 80 percent of the design thermal resistance, provided that the roofing membrane is free of leaks.

b. The roof insulation must remain in a reroofable condition should the roof membrane require replacement (excluding damage caused by fastener pullout during removal of the old membrane.)

c. The Insulating Concrete Warranty must not limit, by geographic location, the owners rights for claims, actions, and/or proceedings.

d. The roof insulation material must not cause structural damage to the building as a result of expansion from thermal or chemical action.

e. The roof insulation system must resist lifting or delamination caused by winds with a peak gust of up to 115 mph.

PART 2 PRODUCTS

Provide a lightweight insulating concrete roof insulation system incorporating vermiculite aggregate and expanded polystyrene board supplied by a single manufacturer. Submit roof plan drawing that includes a roof plan of each roof level, roof slopes, drain locations and thickness of insulation.

SECTION 03 52 00.00 28 Page 6

DIVISION 07 - THERMAL AND MOISTURE PROTECTION

SECTION 07 53 23.00 28

ETHYLENE-PROPYLENE-DIENE-MONOMER ROOFING

PART 1 GENERAL

1.1 REFERENCES

1.2 DESCRIPTION OF ROOF MEMBRANE SYSTEM

1.3 SUBMITTALS

1.3.1 Shop Drawings

1.4 QUALITY ASSURANCE

1.4.1 Qualification of Manufacturer

1.4.2 Qualification of Applicator

1.4.3 Fire Resistance

1.4.4 Wind Uplift Resistance

1.4.5 Preroofing Conference

1.5 DELIVERY, STORAGE, AND HANDLING

1.5.1 Delivery

1.5.2 Storage

1.5.3 Handling

1.6 ENVIRONMENTAL REQUIREMENTS

1.7 SEQUENCING

1.8 WARRANTY

1.8.1 Roof Membrane Manufacturer Warranty

1.8.2 Roofing System Installer Warranty

1.8.3 Continuance of Warranty

1.9 CONFORMANCE AND COMPATIBILITY

PART 2 PRODUCTS

2.1 MATERIALS

2.1.1 EPDM Sheet

2.1.2 Seam Tape

2.1.3 Lap Splice Adhesive

2.1.4 Bonding Adhesive

2.1.5 Lap Cleaner, Lap Sealant, and Edge Treatment

2.1.6 Water Cutoff Mastic/Water Block

2.1.7 EPDM Membrane Flashings and Flashing Accessories

2.1.8 Reinforced EPDM Perimeter Strip for Base Tie-In

2.1.9 Membrane Screw Fasteners and Plates for Wind Uplift

2.1.10 Walkway Pads

2.1.11 Pipe Flashing

2.1.12 Wood Products

2.2 FLASHING CEMENT

PART 3 EXECUTION

3.1 EXAMINATION

3.2 APPLICATION

3.2.1 Special Precautions

SECTION 07 53 23.00 28 Page 1

REPLACED IN ITS ENTIRETY

AMD# 0003

3.2.2 Cold Weather Installation

3.2.3 EPDM Sheet Roofing

3.2.4 Application Method

3.2.4.1 Fully Adhered Membrane Application

3.2.5 Tape Seams / Lap Splices

3.2.6 Adhesive Seams / Lap Splices

3.2.7 Perimeter Attachment

3.2.8 Securement at Base Tie-In Conditions

3.2.9 Fastener Pull Out Test for Lightweight Concrete

3.3 FLASHINGS

3.3.1 General

3.3.2 Membrane Flashing

3.3.3 Membrane Installation at Roof Drain and Overflow Scuppers

3.3.4 PRE-FABRICATED CURBS

3.3.5 Set-On Accessories

3.4 ROOF WALK PADS

3.5 CORRECTION OF DEFICIENCIES

3.6 CLEAN UP

3.7 PROTECTION OF APPLIED ROOFING

3.7.1 Temporary Flashing for Permanent Roofing

3.7.2 Temporary Walkways, Runways, and Platforms

3.8 FIELD QUALITY CONTROL

3.8.1 Construction Monitoring

3.8.2 Manufacturer's Inspection

3.8.3 Manufacturer Warranty Inspection

3.8.4 Roof Drain Test

3.9 INSTRUCTIONS TO GOVERNMENT PERSONNEL

3.10 INFORMATION CARD

-- End of Section Table of Contents --

SECTION 07 53 23.00 28 Page 2

SECTION 07 53 23.00 28

ETHYLENE-PROPYLENE-DIENE-MONOMER ROOFING

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

AMERICAN SOCIETY OF CIVIL ENGINEERS (ASCE)

ASCE 7 (2010; Errata 2011; Supp 1 2013) Minimum Design Loads for Buildings and Other Structures

ASTM INTERNATIONAL (ASTM)

ASTM D412 (2015a) Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers - Tension

ASTM D4637/D4637M (2015) EPDM Sheet Used in Single-Ply Roof Membrane

ASTM D624 (2000; R 2012) Tear Strength of Conventional Vulcanized Rubber and Thermoplastic Elastomers

ASTM D6369 (1999; R 2006) Design of Standard Flashing Details for EPDM Roof Membranes

ASTM E108 (2011) Fire Tests of Roof Coverings

ASTM G155 (2013) Standard Practice for Operating Xenon Arc Light Apparatus for Exposure of Non-Metallic Materials

FM GLOBAL (FM)

FM 4470 (2010) 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/

NATIONAL ROOFING CONTRACTORS ASSOCIATION (NRCA)

NRCA RoofMan (2011 thru 2014) The NRCA Roofing Manual

SECTION 07 53 23.00 28 Page 3

SINGLE PLY ROOFING INDUSTRY (SPRI)

ANSI/SPRI RD-1 (2009) Performance Standard for Retrofit Drains

UNDERWRITERS LABORATORIES (UL)

UL 790 (2004; Reprint Jul 2014) Standard Test Methods for Fire Tests of Roof Coverings

UL RMSD (2012) Roofing Materials and Systems Directory

1.2 DESCRIPTION OF ROOF MEMBRANE SYSTEM

Roofing system must be a fully adhered EPDM roof membrane system applied over an adhered gypsum sheathing coverboard substrate.

1.3 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for information only. When used, a designation following the "G" designation 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

Roof Plan Drawing; G

Wind Load Calculations; G

Boundaries of Enhanced Perimeter; G

Corner Attachments of Roof System Components; G

Location of Perimeter Half-Sheets; G

Spacing of Perimeter, Corner, and Infield Fasteners; G

Slopes and Drain Locations; G

SD-03 Product Data

EPDM Sheet; G

Seam Tape; G

Lap Splice Adhesive

Bonding Adhesive

Lap Cleaner, Lap Sealant, and Edge Treatment

Water Cutoff Mastic/Water Block

Flashing Accessories; G

Flashing Cement

SECTION 07 53 23.00 28 Page 4

Flashings

Reinforced EPDM Perimeter Strip For Base Tie-In; G

Screw Fasteners and Plates; G

Walkway Pads; G

Pipe Flashing

Sample warranty certificate; G

Submit all data required together with requirements of this section. Include a written acceptance by the roof membrane manufacturer of the insulation and other products and accessories to be provided. List products in the applicable wind uplift and fire rating classification listings, unless approved otherwise by the Contracting Officer.

SD-05 Design Data

Wind Uplift Calculations; G

Engineering calculations validating the wind resistance of roof system.

SD-06 Test Reports

Results Of Fastener Pull Out Tests;

SD-07 Certificates

Qualification of Manufacturer;

Qualification of Applicator;

Fire Resistance classification; G

Wind Uplift Resistance classification, as applicable; G

Submit the roof system assembly fire and wind uplift rating classification listings.

SD-08 Manufacturer's Instructions

Application; G

Application Method; G

Membrane Flashing; G

Seam Tape; G

Tape Seams / Lap Splices; G

Adhesive Seams / Lap Splices; G

Perimeter Attachment; G

SECTION 07 53 23.00 28 Page 5

Primer

Fasteners

Cold Weather Installation; G

Include detailed application instructions and standard manufacturer drawings altered as required by these specifications.

Explicitly identify in writing, differences between manufacturer's printed instructions and the specified requirements.

SD-11 Closeout Submittals

Warranty; G

Instructions To Government Personnel; G

Information Card; G

1.3.1 Shop Drawings

The drawings must reflect the project roof plan of each roof level and conditions indicated. Provide all slopes and drain locations. Submit a Roof plan drawing depicting each of the following, as applicable:

a. Wind Load Calculations

b. Boundaries Of Enhanced Perimeter

c. Corner Attachments Of Roof System Components

d. Location Of Perimeter Half-Sheets

e. Spacing Of Perimeter, Corner, And Infield Fasteners

1.4 QUALITY ASSURANCE

1.4.1 Qualification of Manufacturer

EPDM sheet roofing membrane manufacturer must have at least five years experience in manufacturing EPDM roofing products. Submit certification that the manufacturer of the roof membrane meets these requirements.

1.4.2 Qualification of Applicator

Roofing system applicator must be approved, authorized, or licensed in writing by the roof membrane manufacturer and must have a minimum of three years experience as an approved, authorized, or licensed applicator with that manufacturer and be approved at a level capable of providing the specified warranty. The applicator must supply the names, locations and client contact information of five projects of similar size and scope that the applicator has constructed using the manufacturer's roofing products submitted for this project within the previous three years.

1.4.3 Fire Resistance

a. Complete roof covering assembly must:

SECTION 07 53 23.00 28 Page 6

(1) Be Class A rated in accordance with ASTM E108, FM 4470, or UL 790; and

(2) Be listed as part of Fire-Classified roof deck construction in the UL RMSD or Class I roof deck construction in the FM APP GUIDE.

b. FM or UL approved components of the roof covering assembly must bear the appropriate FM or UL label. Submit the roof system assembly fire rating classification listings.

1.4.4 Wind Uplift Resistance

The complete roof system assembly must be rated and installed to resist wind loads calculated in accordance with ASCE 7 and validated by uplift resistance testing in accordance with Factory Mutual (FM) test procedures.

Do not install non-rated systems except as approved by the Contracting Officer. Submit licensed engineer's wind uplift calculations and substantiating data to validate any non-rated roof system. Base wind uplift measurements based on a design wind speed of 100 mph in accordance with ASCE 7 and/or other applicable building code requirements. Submit the roof system assembly wind uplift classification listings.

1.4.5 Preroofing Conference

a. After approval of submittals and before performing roofing system installation work, hold a preroofing conference to review the following:

(1) Drawings, specifications and submittals related to the roof work;

(2) Roof system components installation;

(3) Procedure for the roof manufacturer's technical representative's onsite inspection and acceptance of the roofing substrate, the name of the manufacturer's technical representatives, the frequency of the onsite visits, distribution of copies of the inspection reports from the manufacturer's technical representative;

(4) Contractor's plan for coordination of the work of the various trades involved in providing the roofing system and other components secured to the roofing; and

(5) Quality control plan for the roof system installation;

(6) Safety requirements.

b. Coordinate preroofing conference scheduling with the Contracting Officer. The conference must be attended by the Contractor, the Contracting Officer's designated personnel, personnel directly responsible for the installation of roofing, flashing and sheet metal work, and electrical work, other trades interfacing with the roof work, and representative of the roofing materials manufacturer. Before beginning roofing work, provide a copy of meeting notes and action items to all attending parties. Note action items requiring resolution prior to start of roof work.

SECTION 07 53 23.00 28 Page 7

1.5 DELIVERY, STORAGE, AND HANDLING

1.5.1 Delivery

Deliver materials in their original, unopened containers or wrappings with labels intact and legible. Where materials are covered by a referenced specification number, the labels must bear the specification number, type, class, and shelf life expiration date where applicable. Deliver materials in sufficient quantity to allow continuity of work.

1.5.2 Storage

Store and protect materials from damage and weather in accordance with manufacturer's printed instructions, except as specified otherwise. Keep materials clean and dry. Store and maintain adhesives, sealants, primers and other liquid materials above 60 degrees F. Insulated hot boxes or other enclosed warming devices must be required in cold weather. Mark and remove damaged materials from the site. Use pallets to support and canvas tarpaulins to completely cover material materials stored outdoors. Do not use polyethylene as a covering. Locate materials temporarily stored on the roof in approved areas, and distribute the load to stay within the live load limits of the roof construction. Remove unused materials from the roof at the end of each days work.

1.5.3 Handling

Prevent damage to edges and ends of roll materials. Do not install damaged materials in the work. Select and operate material handling equipment so as not to damage materials or applied roofing. Do not use materials contaminated by exposure or moisture. Remove contaminated materials from the site. When hazardous materials are involved, adhere to the special precautions of the manufacturer. Adhesives may contain petroleum distillates and may be extremely flammable; prevent personnel from breathing vapors, and do not use near sparks or open flame.

1.6 ENVIRONMENTAL REQUIREMENTS

Do not install EPDM sheet roofing during high winds or inclement weather, or when there is ice, frost, moisture, or visible dampness on the substrate surface, or when condensation develops on surfaces during application.

1.7 SEQUENCING

Coordinate the work with other trades to ensure that components which are to be secured to or stripped into the roofing system are available and that permanent flashing and counterflashing are installed as the work progresses. Ensure temporary protection measures are in place to preclude moisture intrusion or damage to installed materials. Application of roofing must immediately follow application of cover board as a continuous operation. Coordinate roofing operations with cover board work so that all roof cover board applied each day is covered with roof membrane installation the same day.

1.8 WARRANTY

Provide roof system material and workmanship warranties meeting specified requirements. Provide revision or amendment to standard membrane manufacturer warranty as required to comply with the specified requirements. Minimum manufacturer warranty shall have no dollar limit, SECTION 07 53 23.00 28 Page 8 cover full system water-tightness, and shall have a minimum duration of 20 years.

1.8.1 Roof Membrane Manufacturer Warranty

Furnish the roof membrane manufacturer's 20 year no dollar limit roof system materials and installation workmanship warranty, including flashing, insulation, and accessories necessary for a watertight roof system construction. The warranty must run directly to the Government and commence at time of Government's acceptance of the roof work. The warranty must state that:

a. If within the warranty period the roof system, as installed for its intended use in the normal climatic and environmental conditions of the facility, becomes non-watertight, shows evidence of moisture intrusion within the assembly, blisters, splits, tears, cracks, delaminates, separates at the seams, shrinks to the point of bridging or tenting membrane at transitions, or shows evidence of excessive weathering due to defective materials or installation workmanship, the repair or replacement of the defective and damaged materials of the roof system assembly and correction of defective workmanship must be the responsibility of the roof membrane manufacturer. The roof membrane manufacturer is responsible for all costs associated with the repair or replacement work.

b. When the manufacturer or his approved applicator fail to perform the repairs within 72 hours of notification, emergency temporary repairs performed by others does not void the warranty.

c. Damage to the roofing system caused by peak recorded wind gusts having a velocity of 100 mph or less is covered by the warranty.

d. Upon completion of installation, and acceptance by the COR and Roofing System Engineer of Record, the manufacturer must supply the appropriate warranty to the Government.

1.8.2 Roofing System Installer Warranty

The roof system installer must warrant for a period of two years that the roof system, as installed, is free from defects in installation workmanship, to include the roof membrane, flashing, insulation, accessories, attachments, and sheet metal installation integral to a complete watertight roof system assembly. Write the warranty directly to the Government. The roof system installer is responsible for correction of defective workmanship and replacement of damaged or affected materials.

The roof system installer is responsible for all costs associated with the repair or replacement work.

1.8.3 Continuance of Warranty

Approve repair or replacement work that becomes necessary within the warranty period and accomplish in a manner so as to restore the integrity of the roof system assembly and validity of the roof membrane manufacturer warranty for the remainder of the manufacturer warranty period.

1.9 CONFORMANCE AND COMPATIBILITY

The entire roofing and flashing system must be in accordance with specified and indicated requirements, including fire and wind resistance

SECTION 07 53 23.00 28 Page 9 requirements. Work not specifically addressed and any deviation from specified requirements must be in general accordance with recommendations of the NRCA RoofMan, membrane manufacturer published recommendations and details, ASTM D6369, and compatible with surrounding components and construction. Submit any deviation from specified or indicated requirements to the Contracting Officer for approval prior to installation.

PART 2 PRODUCTS

2.1 MATERIALS

Coordinate with other specification sections related to the roof work.

Furnish a combination of specified materials that comprise a roof system acceptable to the roof membrane manufacturer and meeting specified requirements. Protect materials provided from defects and make suitable for the service and climatic conditions of the installation.

2.1.1 EPDM Sheet

The roofing membrane must be Ethylene Propylene Diene Terpolymer (EPDM), ASTM D4637/D4637M, Type I, non-reinforced, 0.090 inch nominal thickness for a fully adhered application. The minimum thickness must not be less than minus 10 percent of the specified thickness value. EPDM membrane thickness specified is exclusive of backing material on the EPDM membrane. Principal polymer used in manufacture of the membrane sheet must be greater than 95 percent EPDM. Width and length of sheet must be as recommended by the manufacturer to minimize field formed seams in the field of the roof. The EPDM membrane must meet or exceed the following performance characteristics:

PHYSICAL PROPERTY TEST METHOD VALUE

(BLACK EPDM)

Tolerance on Nominal Thickness

ASTM D412 +/- 10%

Tensile Strength (minimum) ASTM D412 (Die C)

1305 psi

Elongation, ultimate (minimum %)

ASTM D412

(Die C)

300%

Tear Resistance (minimum) ASTM D624 (Die C)

205 lbf/in

Resistance to Heat Aging:

Tensile Strength (minimum) ASTM D412 (Die C)

1205 psi

Elongation, ultimate (minimum %)

ASTM D412

(Die C)

200%

Tear Resistance (minimum) ASTM D624 (Die C)

125 lbf/in

Ultraviolet Weather Resistance (xenon-arc weathering)

ASTM G155 Pass (4,000 hrs)

SECTION 07 53 23.00 28 Page 10

2.1.2 Seam Tape

Provide double-sided synthetic rubber tape, minimum 0.03 inch thick, minimum 3 inch wide. The roof membrane manufacturer must supply seam tape recommended by the manufacturer's printed data for forming watertight bond of EPDM sheet materials to each other for the application specified and conditions encountered. 6 inch wide tape is required for seam seals along lines of mechanical attachment of membrane.

2.1.3 Lap Splice Adhesive

Low volatile organic compound (VOC) synthetic rubber adhesive as supplied by roof membrane manufacturer and recommended by the manufacturer's printed data for forming watertight bond of EPDM sheet membrane materials to each other in areas of membrane flashing. Do not use splice adhesive to form membrane seams in field of roof or at standard base flashing conditions.

2.1.4 Bonding Adhesive

Low volatile organic compound (VOC) adhesive as supplied by roof membrane manufacturer and recommended by the manufacturer's printed data for bonding EPDM membrane materials to insulation, wood, metal, concrete or other substrate materials. Do not use bonding adhesive to bond membrane materials to each other.

2.1.5 Lap Cleaner, Lap Sealant, and Edge Treatment

As supplied by the roof membrane manufacturer and recommended by the manufacturer's printed data.

2.1.6 Water Cutoff Mastic/Water Block

As supplied by the roof membrane manufacturer and recommended by the manufacturer's printed data.

2.1.7 EPDM Membrane Flashings and Flashing Accessories

Membrane flashing for the parapet walls, roof contraction joint, roof hatch curb and roof penetrations must be 0.090 inch minimum cured EPDM, as recommended by the roof membrane manufacturer to achieve the 20-year roofing system material warranty. Use cured EPDM membrane to the maximum extent recommended by the roof membrane manufacturer. Limit uncured flashing material to reinforcing inside and outside corners and angle changes in plane of membrane, and to flash scuppers, pourable sealer pockets, and other formed penetrations or unusually shaped conditions as recommended by the roof membrane manufacturer where the use of cured material is impractical.

2.1.8 Reinforced EPDM Perimeter Strip for Base Tie-In

To anchor horizontal to vertical transitions of the 90 mil EPDM flashing, provide a reinforced EPDM perimeter fastening strip as recommended by the EPDM membrane manufacturer. The fastening strip must be a minimum 6 inches wide.

2.1.9 Membrane Screw Fasteners and Plates for Wind Uplift

a. Steel Deck Fasteners: If required, provide coated, corrosion-resistant fasteners as recommended by the roof membrane manufacturer

SECTION 07 53 23.00 28 Page 11 and meeting the requirements of FM 4470 and FM APP GUIDE for Class I roof deck construction and the wind uplift resistance specified.

Fasteners must also be as supplied and warranted for the substrate type(s) by EPDM sheet manufacturer and recommended by EPDM sheet manufacturer's printed data. Fasteners must be protected against corrosion with a base coat of electro-deposition epoxy and two top coats of acrylic. Plate washers must be as recommended by the roof membrane manufacturer for use with the recommended fasteners. At minimum, plate washers must be made with minimum 20 gauge CQ grade steel with an AZ 55 Galvalume coating. Washers must not be less than 2 inches in diameter.

b. Lightweight Concrete Screw Fasteners: Provide corrosion-resistant fasteners as recommended by the roof membrane manufacturer and meeting the requirements of FM 4470 and FM APP GUIDE for Class I roof deck construction and the wind uplift resistance specified. Fasteners must also be as supplied and warranted for the lightweight concrete substrate by EPDM sheet manufacturer and recommended by EPDM sheet manufacturer's printed data. Fasteners must be zinc plated to a minimum thickness of 0.0003 inch (8 µm). Plate washers must be as recommended by the roof membrane manufacturer for use with the recommended fasteners. At minimum, plate washers must be made with minimum 20 gauge CQ grade steel with an AZ 55 Galvalume coating.

Washers must not be less than 2 inches in diameter.

c. Auxiliary Fasteners: For miscellaneous attachments, use stainless steel screws, nails, or other type of stainless steel anchors suitable for intended attachment purpose and as recommended by the roof membrane manufacturer.

2.1.10 Walkway Pads

Walkway pads must be made with rubber polymers or material as standard with the roofing membrane manufacturer. Walkpads must not be less than 1/4 inch thick and 30 inches square and must have a molded pattern of dimples or other surface texture design to create slip-resistant.

2.1.11 Pipe Flashing

Pipe flashings must be molded EPDM boot with a graduated design to allow flashing over various pipe sizes. Flashing must have an aluminum or stainless steel flange at the bottom to facilitate glue adhesion to the EPDM membrane. Each pipe flashing must be supplied with a stainless steel clamping ring to secure it to the pipe.

2.1.12 Wood Products

Do not allow fire retardant treated materials be in contact with EPDM membrane or EPDM accessory products, unless approved by the membrane manufacturer and the Contracting Officer.

2.2 FLASHING CEMENT

Provide a self-vulcanizing butyl compound flashing cement for splicing laps and for flashings workable at 20 degrees F. Obtain a recommendation for such flashing cement from the roofing membrane manufacturer.

SECTION 07 53 23.00 28 Page 12

PART 3 EXECUTION

3.1 EXAMINATION

Ensure that the following conditions exist prior to application of the roofing materials:

a. All new roof insulation, gypsum roof sheathing and the new contraction joint curb assembly are in place and properly attached.

b. Surfaces are rigid, clean, dry, smooth, and free from cracks, holes, and sharp changes in elevation.

c. The plane of the substrate does not vary more than 1/4 inch within an area 10 by 10 feet when checked with a 10 foot straight edge placed anywhere on the substrate.

d. Substrate is sloped to provide positive drainage.

e. Walls and vertical surfaces are constructed to receive counterflashing, and will permit mechanical fastening of the base flashing materials.

f. Treated wood nailers are in place on non-nailable surfaces, to permit nailing of base flashing at minimum height of 8 inch above finished roofing surface.

g. Pressure-preservative and fire treated wood nailers are fastened in place as indicated for securing of membrane, edging strips, attachment flanges of sheet metal, and roof fixtures. Embedded nailers are flush with deck surfaces.

h. Avoid contact of EPDM materials with fire retardant treated wood, except as approved by the roof membrane manufacturer and Contracting Officer.

i. Cover boards are installed smoothly and evenly, and are not broken, cracked, or curled. There are no gaps in cover board joints exceeding 1/4 inch in width. Cover board is being roofed over on the same day the cover board is installed.

3.2 APPLICATION

Apply entire EPDM sheet utilizing fully adhered application method, with mechanical fasteners as required at roof perimeters to meet the specified wind uplift requirements. Apply roofing materials as required by the membrane manufacturer's installation instructions and as specified herein.

Where the manufacturer's instructions and the specified requirements conflict, use the stricter of the two methodologies. Any variations to methodologies and requirements contained in these specifications must be approved by the Contracting Officer.

3.2.1 Special Precautions

a. Do not dilute coatings or sealants unless specifically recommended by the materials manufacturer's printed application instructions. Do not thin liquid materials with cleaners used for cleaning EPDM sheet.

b. Keep liquids in airtight containers, and keep containers closed

SECTION 07 53 23.00 28 Page 13 except when removing materials.

c. Use liquid components, including adhesives, within their shelf life period. Avoid excessive adhesive application and adhesive spills, as they can be destructive to some elastomeric sheets and insulations;

follow adhesive manufacturer's printed application instructions. Mix and use liquid components in accordance with label directions and manufacturer's printed instructions.

d. Provide clean, dry cloths or pads for applying membrane cleaners and cleaning of membrane.

e. Do not use heat guns or open flame to expedite drying of adhesives or primers.

f. Require workmen and others who walk on the membrane to wear clean, soft-soled shoes to avoid damage to roofing materials.

g. Do not use equipment with sharp edges which could puncture the EPDM sheet.

h. Shut down air intakes and any related mechanical systems and seal open vents and air intakes when applying solvent-based materials in the area of the opening or intake. Set up temporary fans and ductwork as necessary to ensure adequate Powerhouse ventilation is maintained during the duration of any shut-downs of the permanent Powerhouse ventilation system. Coordinate shutdowns with the Contracting Officer.

3.2.2 Cold Weather Installation

Do not install the EPDM roof membrane, flashing and flashing accessories when temperatures fall below 32 degrees F or are anticipated to fall below 32 degrees F within 48 hours of EPDM installation. When EPDM installation temperatures fall below 40 degrees, or is within 5 degrees F of the dewpoint, follow the EPDM manufacturer's printed instructions for installation during cold weather conditions. When application temperatures fall below 60 degrees F, store adhesives at 60 to 80 degrees F until immediately before use. Also use an additional heat source when installation temperatures are below 60 degrees F to ensure the formability of uncured EPDM flashing products.

3.2.3 EPDM Sheet Roofing

Provide a watertight roof membrane sheet free of contaminants and defects that might affect serviceability. Provide a uniform, straight, and flat edge. Unroll EPDM sheet roofing in position without stretching membrane.

Inspect for holes. Remove sections of EPDM sheet roofing that are damaged.

Allow sheets to relax minimum 30 minutes before seaming. Lap sheets as specified, to shed water, and as recommended by the roof membrane manufacturer's published installation instructions for the application required but not less than 3 inch in any case.

3.2.4 Application Method

3.2.4.1 Fully Adhered Membrane Application

Layout membrane and side lap adjoining sheets in accordance with membrane manufacturer's printed installation instructions. Allow for sufficient membrane to form proper membrane terminations. Remove dusting agents and

SECTION 07 53 23.00 28 Page 14 dirt from membrane and substrate areas where bonding adhesives are to be applied. Apply specified adhesive evenly and continuously to substrate and underside of sheets at rates recommended by the roof membrane manufacturer's printed application instructions. When adhesive is spray applied, roll with a paint roller to ensure proper contact and coverage.

Do not apply bonding adhesive to surfaces of membrane in seam or lap areas.

Allow adhesive to flash off or dry to consistency prescribed by manufacturer before adhering sheets to the substrate. Roll each sheet into adhesive slowly and evenly to avoid wrinkles; broom or roll the membrane to remove air pockets and fishmouths and to ensure full, continuous bonding of sheet to substrate. Form field lap splices or seams as specified. Check all seams and ensure full lap seal. Apply lap sealant to all adhesive formed seams and all cut edges of reinforced membrane materials. Where required, manufacturer's instructions must include pattern and frequency of mechanical attachments required in the field of roof, corners, and perimeters to provide for the specified wind resistance.

3.2.5 Tape Seams / Lap Splices

As far as practicable, factory form the sheet to sheet seams. When field forming seams, or lap splices, use seam tape in accordance with membrane manufacturer's printed instructions and as specified. Clean and prime mating surfaces in the seam area. After primer has dried or set in accordance with membrane manufacturer's instructions, apply seam tape to bottom membrane and roll with a 3 inch to 4 inch wide smooth silicone or steel hand roller, or other manufacturer approved rolling device, to ensure full contact and adhesion of tape to bottom membrane. Tape end laps must be minimum 1 inch. Roll top membrane into position to check for proper overlap and alignment. Remove release paper from top of seam tape and form seam splice. Ensure top membrane contact with seam tape as release paper is removed. Roll the closed seam with a smooth silicone or steel hand roller, rolling first across the width of the seam then along the entire length, being careful not to damage the membrane. Apply minimum 9 inch long strip of membrane-backed flashing tape over T-intersections of roof membrane. Roll tape to ensure full adhesion and seal over T-joint.

3.2.6 Adhesive Seams / Lap Splices

a. Do not use adhesive formed seams for field of roof membrane seaming. Field-applied adhesive formed seams must be utilized only in flashing areas where allowed by the membrane manufacturer for the specified roofing system warranty. Thoroughly and completely clean mating surfaces of materials throughout the lap area. Remove all dirt, dust, and contaminants and allow to dry.

b. Apply primer as recommended by the membrane manufacturer. Apply splice adhesive with a 3 inch to 4 inch wide, 1/2 inch thick, solvent-resistant brush in a smooth, even coat with long brush strokes. Bleed out brush marks. Do not apply adhesive in a circular motion.