1. CA20210514 CGR Roof Specifications.pdf

SECTION C - STATEMENT OF WORK

CONSUL GENERAL RESIDENCE - VILLA MIRADOR - ROOF REPLACEMENT

March 20, 2021

U.S. CONSULATE

CASABLANCA MOROCCO

ROOF & FAÇADE MANAGEMENT PROGRAM

FACILITY MANAGEMENT

OVERSEAS BUILDINGS OPERATIONS

U.S. DEPARTMENT OF STATE

WASHINGTON DC

WARNING: This document is the property of the U.S. Government. Further reproduction and/or distribution is prohibited without the express written approval of Department of State; Overseas Building Operations; Washington, D.C. 20520. Trust us, we're the U.S.

Government.

CONSUL GENERAL RESIDENCE ROOF REPLACEMENT

03.20.21 TABLE OF CONTENTS 2

PROJECT MANUAL and SPECIFCATIONS

SECTION 00003 – TABLE of CONTENTS

Division 1 01010 – Summary of Work

01022 – Site Photographs 01535 – Rooftop Safety 01700 – Contract Closeout

Division 2

02072 – Removals and Renovation Work

Division 3 - 6 Not Used

Division 7 07525 – Protected Membrane Roofing

07530 - Plaza Deck Membrane Roofing 07560 - Elastomeric Roof Coating

07620 – Sheet Metal Flashing 07920 – Sealants

Division 8

Not Used

Division 9

09210 - Exterior Plaster Restoration 09910 - Exterior Painting

Division 10 – 16

Not used

Division 17 17000 - Temporary Electromechanical Disconnects

END OF TOC

03.20.21 SUMMARY OF WORK 01010 - 1

SECTION 01010 - SUMMARY OF WORK

PART ONE - GENERAL

1.01 SUMMARY:

A. The U.S. American Consulate in Casablanca Morocco and Overseas Buildings Operations [OBO] have a requirement to obtain Construction Services for replacing the flat roofs on the Consul General Residence (CGR), pleasantly referred to as "Villa Mirador." The proposed roof replacement shall consist of replacement of the entire CGR two high roof levels; two low patio plaza deck levels; and four flat concrete canopies, but is not limited to the following;

High Roofs:

1. Removal and disposal of existing roof systems down to existing flat concrete deck.

2. Demolition of existing abandon chimney, upturned concrete or masonry beams in designated areas.

3. Repair and enlargement of existing drain areas and cut-in of new cast iron drains.

4. Installation of masonry and wood nailer capped parapet walls.

5. Installation of two-ply modified bitumen roof membrane and associated membrane flashings.

6. Installation of sheetmetal flashings at penetrations, scuppers, area dividers, and perimeters.

7. Installation of drain board, XPS insulation, filter fabric, and concrete paver overburden.

8. Installation of new standing seam sheet metal coping.

9. Repair and paint application on existing masonry parapet walls and chimneys.

10. Temporary relocation of existing satellite dishes, parapet mounted site lighting, and solar hot water heaters on roof pavers with new water piping and non-penetrating pipe supports and electrical connections.

Low Patio Plaza Decks:

1. Removal and disposal of existing roof systems down to existing flat concrete deck.

2. Repair and enlargement of existing drain areas and cut-in of new cast iron flush mounted drains.

3. Installation of two-ply modified bitumen roof membrane and associated membrane flashings.

4. Installation of sloped mortar set topping bed and ceramic tiles to provide minimum 2% slope to drain.

5. Repair and paint application on existing masonry parapet walls and steel handrails.

03.20.21 SUMMARY OF WORK 01010 - 2

Flat Concrete Canopies:

1. Removal and disposal of existing roof systems down to existing flat concrete deck.

2. Repair, enlarge, and fabric reinforced roof coating of existing area drains.

3. Repair, elastomeric and fabric reinforced roof coating application on existing flat concrete and upturn flashings.

1.02 SUBMITTALS:

A. Contractor's executed payment and performance bonds.

B. Contractor's executed insurance certificate.

C. Submit subcontractor's insurance coverage in compliance with contract requirements.

D. Detailed project schedule showing work phasing and proposed daily progress.

E. Applicator's License Certificate: Roofing material manufacturer's agreement indicating date application was approved and expiration date.

F. Drawings of all specific waterproofing details.

G. Construction Accident Prevention Plan (CAPP) H. Manufacturer’s warranties that are to be issued upon project completion.

1.03 SUBSTITUTIONS AND PRODUCT OPTIONS:

A. Contractor's Representation: Request for substitution constitutes a representation that Contractor:

1. Has investigated proposed product and determined that it is equal to or superior in all respects to that specified.

2. Shall provide same warranties for substitution as for product specified.

3. Shall coordinate installation of accepted substitution into Work and make such other changes as may be required for Work to be complete in all respects.

4. Waives all claims for additional costs, under his responsibility, related to substitution which subsequently becomes apparent.

5. If substitution is not approved or accepted, Contractor shall furnish specified product.

B. Substitutions:

1. During Solicitation only written requests for substitutions of products in place of those specified will be considered. Such requests must be received at least two weeks prior to Proposal Date. Requests received after that time will not be considered. Approval of substitutions will be set forth in an Amendment.

2. Requests for substitutions supported with complete data, drawings, and appropriate samples shall include data listed below:

a. Product description, performance and test data, and applicable reference standards.

b. Changes required in other elements of Work because of substitution.

c. Effect on construction schedule.

C. Product Options: For products specified by naming several products or manufacturers, select any product and manufacturer named.

03.20.21 SUMMARY OF WORK 01010 - 3

1.04 QUALITY CONTROL:

A. OBO has the right to inspect and test all services, to the extent practicable at all times and places during the work. OBO may perform full time quality assurance inspections [QAI] and tests during construction to confirm the work is installed according to the Construction Documents.

B. Contractor shall be approved by manufacturer to perform the work for the specified guarantee period.

C. The Contractor shall be responsible for the following construction inspections and tests:

1. Mortar Set Topping Design Mix.

2. Membrane Flashing Seam Adhesion Test

3. Concrete Paver Strength Test

4. Roof Area Flood Test

5. Manufacturer’s Warranty Inspection

1.05 STORAGE OF MATERIALS:

A. Proper storage of materials is the sole responsibility of Contractor. Protect all materials susceptible to moisture including, but not limited to, all roll goods, insulation, cant strip, wood, and plywood in dry, above ground, watertight storage. Keep all labels intact and legible, clearly showing the product, manufacturer, and other pertinent information.

B. Store materials on site. Cover and protect materials subject to damage by weather, including during transit. Stored materials shall be available for inspection.

C. Store flammable and volatile liquids in sealed containers located a minimum of 20 feet from existing buildings.

D. Liquid products shall be delivered sealed, in original containers. Store roll goods in an upright position.

E. Distribute material, debris, and equipment over the roof deck to avoid damage to the structural deck. Place materials and equipment to be stored on the roof as nearly direct over structural members as can be determined. Secure equipment, material, and debris on the roof to prevent movement by wind or other elements.

1.06 TEMPORARY FACILITIES:

A. Temporary Water:

1. Make arrangements with Consulate for water required for construction.

Consulate will pay for cost of water.

2. Do not disrupt existing water service to the building.

3. Provide hoses for conveyance.

B. Temporary Electrical

1. Make arrangements with Consulate for temporary electrical service. Consulate will pay energy charges for temporary power and lighting.

2. Provide all necessary temporary wiring, extensions, and temporary lighting devices.

3. Provide necessary provisions to avoid disruptions to the residence electrical service and daily operations.

C. Temporary Barricades, Ladders, Chutes, Scaffolds, Hoists and Cranes:

1. Furnish and maintain temporary ramps, scaffolds, hoists, or chutes as required for proper execution of Work.

2. Provide barricade constructed of suitable materials and dimensions to

03.20.21 SUMMARY OF WORK 01010 - 4

conceal work area and to protect building users/occupants that is soundly mounted/secured to prevent displacement during work but that shall remain moveable.

3. Remove guardrails and barricades at completion of construction.

1.07 PROJECT PROCEDURES:

A. Owner will occupy premises during entire period of construction for the conduct of normal, daily operations. Cooperate with Owner's Representative in all construction operations to minimize conflict and to facilitate Owner usage.

B. Contractor shall conduct his operations so as to ensure least inconvenience to Owner's operations.

C. Contractor shall take precautions to avoid excessive noise or vibration that would disturb Owner's operations. When directed by Owner, Contractor shall perform certain operations at designated time of day or night in order to minimize disturbance to Owner's operations.

D. Contractor shall take all necessary precautions to assure a watertight condition in the operation portion of the building during construction.

PART TWO - PRODUCTS

Not Used.

PART THREE - EXECUTION

3.01 PERIOD OF PERFORMANCE:

A. Solicitation:

1. Pre-proposal Site Visit 30 days prior to Award

2. Award Day Zero

B. Pre-Construction Submittals:

1. Bond & Insurance Submittals 14 days after award

2. Contractor Officer Review 6 days

3. Pre-Construction Submittals 30 days

4. Consulate & OBO Submittal Review 30 days

5. Material Procurement 30 days

6. Shipping & Customs (if required) 30 + 20 days

7. Crew Information 10 days

8. Consulate & OBO Review 30 days

C. Construction:

1. High Roof Areas 30 days

2. Low Patio Plaza Decks 30 days

3. Low Concrete Canopies 15 days

4. Final Clean up Begins 10 days prior to completion

5. Total Time On-Site 75 days

D. Total Period Of Performance 275 days E. Rainy Season Months December - May

03.20.21 SUMMARY OF WORK 01010 - 5

3.02 PROPOSAL SCHEDULE:

A. Proposals shall be evaluated of a total fixed price. The proposal shall include labor, materials, overhead, profit, travel expenses and worker incidentals as a complete project.

END OF SECTION

CONSULATE GENERAL RESIDENCE ROOF REPLACEMENT

CASABLANCA, MOROCCO

03.20.21 SITE PHOTOGRAPHS 01022 - 1

SECTION 01022 - SITE PHOTOGRAPHS

INFO: These photographs are to provide supplemental existing condition information to the Contractor.

This existing condition information is non-binding and is not part of the Contract Documents.

03.20.21 SITE PHOTOGRAPHS 01022 - 2

03.20.21 ROOF CONSTRUCTION SAFETY 01535 - 1

SECTION 01535 – ROOF CONSTRUCTION SAFETY

1.01 SUMMARY

A. The Contractor is responsible and shall continue management and implementation of a safety and health program throughout construction.

B. The Contracting Officer and the Embassy Post Occupational Safety and Health Officer [POSHO] reserve the right to suspend work when and where Contractor's safety and health program is considered to be operating in an inadequate or non-complying manner.

1.02 REGULATIONS AND STANDARDS

A. Governing regulations: Latest edition of U.S. Army Corps of Engineers (COE) Safety and Health Requirements Manual, EM 385-1-1

1.03 SUBMITTALS

A. Construction Accident Prevention Plan (CAPP) is a job site specific safety and health policy and program management document. Submit a CAPP to ensure safety of all persons at the site in event of an emergency.

B. Management Commitment: Provide introductory policy statement signed by senior officers of design/build firm stating that implementation and management of the CAPP has full cooperation and support of management.

C. The CAPP shall include the following:

1. Statement of safety and health policy.

2. Administrative responsibilities for implementing the plan.

3. Identification of personnel responsible for accident prevention.

4. Plans for hazard communication, and continued safety and health training.

5. Provisions for inspections of work sites, materials, and equipment.

6. Emergency response capabilities to minimize consequences of accidents.

7. Public safety requirements.

1.04 QUALITY ASSURANCE

A. Safety and Health Program Manager:

1. Appoint a manager whose duties shall include effective implementation, coordination, and enforcement of CAPP.

2. The manager shall be qualified to anticipate, identify, evaluate, and implement corrective action in relation to potential safety and health hazards and dangerous exposures for accident prevention.

3. The manager shall meet with the POSHO and Embassy's Representative to discuss site specific safety and health issues.

B. Inspections:

1. Provide for frequent safety, health, and housekeeping inspections conducted by the Safety and Health Program Manager, temporary structures, fabrication shops, material, machinery and equipment.

03.20.21 ROOF CONSTRUCTION SAFETY 01535 - 2

2. Quality Assurance Inspectors, as part of their QA responsibilities, shall conduct and document daily safety, health, and housekeeping inspections; and impose fines on the Safety and Health Program Manager by sending him to an Ethics and Morals for Safety Etiquette reeducation program for every infraction of the CAPP noted on the job site.

C. Tool Box Meetings: Hold safety meetings once each week. Require attendance by all laborer, and supervisors; include those of separate contractors. Contractor shall consider the following check-list:

1. Who is trained in CPR

2. Location and level of local hospital services

3. Do local doctors speak English

4. Type of emergency vehicles and distances

5. Are cell phones or radios available

6. Level of embassy doctor or nurse services

7. Family contact names and telephone numbers for all crew

2.01 TOOLS, EQUIPMENT, AND MACHINERY

A. Quality: Hand tools, power tools, equipment, machinery, materials, and personal protective apparatus shall be of manufacture listed by U.S. or internationally recognized testing laboratory for specific application for which they are to be used. They shall be quality products recognized for professional construction use, applications, and work practices.

B. Scaffolding: Shall be a standard tubular frame and clamp system manufactured and tested according to international standards. The Scaffold system shall include the scaffold manufacturers integrated access stairway sections, handrails, toe boards and walking platforms.

C Safe Clearance Procedure: Prior to initial use, and periodically thereafter at times of continued use, provide inspections of construction tools, equipment, and machinery.

Do not permit continued use of tools, equipment, and machinery that are not in good condition.

D. Fall Protection: On unprotected sides of the building edge provide workers with warning lines, guardrail, safety net or personal fall arrest systems or a combination of safety monitoring systems.

C. Hazardous work shall be brought to the attention of the QAI and POSHO prior to commencing the work.

1. Hot Work: Includes all work that results in open flame such as welding, cutting, brazing, and burning. The Contractor shall provide effective fire protection and prevention at all times during such operations.

2. Confined Space: Work in enclosed areas such as sewers, vaults, vessels, manholes, pits, etc.

3. Internal Combustion: The use of cranes, forklifts, hoists, or generators powered by petroleum fuel when used on or near the building.

03.20.21 ROOF CONSTRUCTION SAFETY 01535 - 3

Not Used

03.20.21 CONTRACT CLOSEOUT 01700 - 1

SECTION 01700 - CONTRACT CLOSEOUT

1.01 GENERAL:

A. Comply with requirements stated in Conditions of the Contract and in Specifications for administrative procedures in closing out the Work.

1.02 SUBSTANTIAL COMPLETION:

A. Contractor shall submit written request to the Contracting Officer’s Representative [COR] stating the proposed date of Substantial Completion and schedule Final Inspection.

B. Written certification shall include:

1. Contract Documents have been reviewed.

2. Project has been inspected for compliance with Contract Documents.

3. Work has been completed in accordance with Contract Documents.

4. Equipment and systems have been tested in presence of Owner's

Representative and are operational.

5. Project is complete and ready for final inspection.

C. Quality Assurance Inspector or Embassy Facilities Manager will make a pre-inspection after notification. Should the work not be complete, they will issue an inspection list to Contractor with noted items requiring further consideration.

1.03 FINAL INSPECTION:

A. Contracting Officer’s Representative will make final inspection after notification from Contractor.

B. Should COR consider Work complete in accordance with requirements of Contract Documents, he will request Contractor to begin Final Clean-up and Project Closeout submittals.

C. Should COR consider Work not complete:

1. Contractor shall take immediate steps to remedy the stated deficiencies and submit initialed inspection list to the COR certifying Work is complete.

2. COR will re-inspect Work.

1.04 REINSPECTING COSTS:

A. Should the Contracting Officer’s Representative be required to perform subsequent inspections of the Work due to the failure of the Contractor to correct deficient work, the additional services will be deducted from the final payment to Contractor.

1.05 WARRANTY/GUARANTEE:

A. Submit original and duplicate copies of both Contractor's Warranty and Manufacturer's Guarantee for review. After review, Contracting Officer’s Representative shall approve final pay application upon receipt of both Contractor's Warranty and Manufacturer's Guarantee.

03.20.21 CONTRACT CLOSEOUT 01700 - 2

1.06 EVIDENCE OF PAYMENTS AND RELEASE OF LIENS:

A. Contractor’s Release and Waiver of Liens:

1. Contractor's Waiver of Liens.

2. Separate waivers of liens for subcontractors, suppliers, and others with lien rights against property of Owner, together with complete list of those parties.

3. Consent of Surety

B. All submittals shall be notarized and sealed before delivery to the COR.

1.07 FINAL ADJUSTMENT OF ACCOUNTS:

A. Submit final statement of accounting to the COR.

B. Statement shall reflect all adjustments.

1. Original Contract Sum.

2. Additions and Deductions resulting from:

a. Previous Change Orders.

b. Deductions for uncorrected Work.

c. Deductions for Reinspection Payments.

3. Total Contract Sum, as adjusted.

4. Previous payments.

5. Sum remaining due.

1.08 FINAL APPLICATION FOR PAYMENT:

A. The Contractor shall submit one copy of all payment invoices, with the appropriate backup documents to the COR. The Contractor shall submit receipts for all allowance costs and reimbursable expenses incurred. The COR also will determine if billed services have been satisfactorily performed and if expenses billed are correct. If it is determined that the amount billed is incorrect, the COR will within seven days, request the Contractor to submit a revised invoice.

B. Final payment will not be approved or released until receipt of proper close-out documents.

C. All invoices shall include the contract and delivery order numbers and shall be mailed to the following address: OBO/RM/FM, U.S. Department of State, Washington, D.C. 20522-

03.20.21 CONTRACT CLOSEOUT 01700 - 3

CONTRACTOR’S RELEASE

PROJECT____________________________________________________________________________________

CONTRACT NO._____________________________________DATED________________BY__________________________

CONTRACT SUM $_____________________________________________________________________________DOLLARS

CONTRACTOR NAME____________________________________________________________________________________

ADDRESS___________________________CITY_______________STATE_______ZIP_______COUNTRY____

Contractor hereby certifies that there are no outstanding obligations of the undersigned, the contracting firm, corporation, employee, dealer, subcontractor, or any others who would have standing against the property of the Government of the United

States of America (“Government”) under this contract.

In consideration of the sum stated above, upon payment of said sum to undersigned Contractor or assignees, the Government, its officers, agents, and employees are fully released and discharged of all obligations, liabilities, claims, and demands made under and arising from the contract, except:

1. Specified claims in stated or estimated amounts where the amounts are not susceptible of exact statement by the

Contractor. If none, check this box ; if yes, please check this box and itemize on reverse.

2. Claims, together with reasonable expenses incidental thereto, based upon the liabilities of the Contractor to third parties arising out of the performance of said contract, which are not known to the Contractor on the date of the execution of this release and of which the Contractor gives notice in writing to the Contracting Officer within the period specified in said contract.

3. Claims for reimbursement of costs (other than expenses of the Contractor by reason of his/her indemnification of the Government against patent liability), including reasonable expenses incidental thereto, incurred by the

Contractor under any provisions of the said contract relating to patents.

Contractor agrees, in connection with patent matters and with all claims which are not released as set forth above, that he/she will comply with all provisions of the said contract, including without limitation, those provisions relating to notification to the

Contracting Officer and relating to the defense or prosecution of litigation.

Subscribed and sworn to before me on this ____day of __________________, 20____.

____________________________________ CONTRACTOR

Notary Public:

My Commission Expires: TITLE______________________________

NOTE: In the case of a corporation as Contractor, Notarization is not required, but the certification below must be completed.

CERTIFICATE

I,______________________________, certify that I am the _______________________secretary of the corporation named as

Contractor in the foregoing release; that __________________________who signed said release on behalf of the Contractor was then ___________________________of said corporation, that said release was duly signed for and on behalf of said corporation by authority of its governing body and is within the scope of its corporate powers.

03.20.21 CONTRACT CLOSEOUT 01700 - 4

CONSENT OF SURETY

PROJECT____________________________________________________________________________________

CONTRACT NO._____________________________________DATED________________BY__________________________

CONTRACT SUM $_________________________________________IN__________________________________DOLLARS

CONTRACTOR NAME____________________________________________________________________________________

ADDRESS___________________________CITY_______________STATE_______ZIP_______COUNTRY____

The Surety (Co-sureties) consent/s to the foregoing contract modification and agree/s that its/their bond/s shall apply and extend to the contract as modified or amended.

NAME & ADDRESS OF PRINCIPAL SIGNATURE

NAME (Affix Seal)

TITLE

DATE

NAME & ADDRESS OF PRINCIPAL SIGNATURE

NAME (Affix Seal)

CORPORATE / INDIVIDUAL SURETY (CO-SURETIES)

The Principal or authorized representative shall execute this consent of surety with the modification to which it pertains. If the representative (e.g. attorney-in-fact) that signs the consent is not a member of the partnership, or joint venture, or an officer of the corporation involved, a Power-of-Attorney or a Certificate of Corporate Principal must accompany the consent.

CORPORATE/INDIVIDUAL SURETY’S NAME & ADDRESS PERSON EXECUTING CONSENT (SIGNATURE)

A NAME (Affix

Seal)

B NAME (Affix

Seal)

C NAME (Affix Seal)

IN

D

IV

ID

U A

L

P R

IN

C

IP

C O

R P

O R

A T

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P R

IN

C

IP

03.20.21 REMOVALS & RENOVATION WORK 02072 - 1

SECTION 02072 - REMOVALS AND RENOVATION WORK

1.01 SECTION INCLUDES:

A. Removal of existing modified bitumen roofing and sheet metal.

B. Demolition of existing abandon chimney, upturned concrete or masonry beams in designated areas.

C. Installation of masonry and wood nailer capped roof area dividers.

D. Modification of existing roof penetrations, equipment supports or curbs, pitch pans, reglets, piping, and electrical service to provide proper flashing height and flashing detail.

1.02 PROJECT CONDITIONS:

A. Environmental Requirements:

1. Do not remove existing roofing and flashing in inclement weather or when rain is predicted with 30 percent possibility.

2. When ambient temperature is below 15 degrees Celsius (60 degrees

Fahrenheit), expose only enough cement and adhesive required within four hour period.

3. Do not expose membrane and accessories to constant temperature in excess of 82 degrees Celsius (180 degrees Fahrenheit).

B. Emergency Equipment: Maintain on-site materials necessary to apply emergency temporary seal in event of sudden storms or inclement weather.

C. Smoking is prohibited in existing building.

1.03 SEQUENCING AND SCHEDULING:

A. Sequence removals and renovation with sequence of new work to maintain facility in dry, watertight condition.

B. Coordinate roof work so that no more existing items are removed in one day than can be replaced with new roofing work in same day.

2.01 MATERIALS:

A. Wood Treatment: Pressure preservative treated in accordance with AWPA C2, C9 standards, Ground Contact using Chromated Copper Arsenate (CCA) at 0.1kg per 0.03cm (0.40 pounds per cubic foot) wood. Preservatives shall be compatible with roof membrane.

B. Lumber (Members, Nailers, and Blocking):

1. Standard Grade Fir or No. 2 Southern Yellow Pine bearing UL label. Size shall be appropriate for application, minimum 50mm (2-inch) (nominal) thickness.

2. Complying with American Lumber Standards of manufacturer's association under whose rules lumber is produced. Marked with mill identification.

3. Moisture Content: 19 percent maximum at time of installation.

03.20.21 REMOVALS & RENOVATION WORK 02072 - 2

C. Fasteners:

1. Concrete Substrate:

a. Fasteners for securing sheet metal items to concrete substrate shall be a pre-assembled drive anchor with a stainless steel drive screw, a lead/zinc alloy expansion anchor body (6mm [1/4-inch] diameter, 38mm [1-1/2-inch] length) and a stainless steel washer with integral rubber seal (1-1/8-inch diameter) such as "Zamac Hammer-Screw" as manufactured by Powers Rawl.

b. Fasteners for securing wood nailers to concrete substrate shall be sleeved stud expansion bolt, 13mm (1/2-inch) diameter (minimum), with 19mm (3/4-inch) diameter steel washer such as "Kwik Bolt II" by Hilti.

2. Masonry Substrate:

a. Fasteners for securing wood to solid masonry shall be galvanized steel expansion anchor, 9mm (3/8-inch) diameter (minimum), with 19mm (3/4-inch) diameter steel washer such as "Countersunk Kwik Bolt II" by Hilti.

b. Fasteners for securing wood to hollow base masonry shall be 9mm (3/8-inch) diameter (minimum), threaded rod, with 9mm (3/4-inch) diameter washer, nut, and screen tube such as "HIT C-20 Adhesive Anchor" by Hilti.

c. Fasteners for securing sheet metal items to concrete substrate shall be a pre-assembled drive anchor with a stainless steel drive screw, a lead/zinc alloy expansion anchor body (6mm [1/4-inch] diameter, 38mm [1-1/2-inch] length) and a stainless steel washer with integral rubber seal (1-1/8-inch diameter) such as "Zamac Hammer-Screw".

D. Rust Inhibitive Primer: 100 percent acrylic resin primer such as “Metalclad Interior- Exterior Acrylic Latex Flat Primer & Finish #41702”, Devoe & Raynolds Co.

E. Equipment Supports: Pre-manufactured supports constructed from 47mm by 47mm (1-7/8-inch by 1-7/8-inch) 12 gauge channel steel with rectangular support bases and steel angle supports. Provide threaded rod to connect supports such as "Type RTU-20" as manufactured by Portable Pipe Hangers, Houston, Texas (800/797-6585) or approved equal.

F. Non-shrink Grout: Nonshrink, noncorrosive, grouting compound; CRD-C-621, Type D, such as “Sonogrout 10K”, Sonneborn Building Products, or approved equal.

G. Masonry Materials:

1. Mortar Materials: Pre-mixed masonry mortar, Type S, ASTM C270.

2. Water: Clean, free of oil, acids, alkalis, and organic matter.

3. Masonry Units: Concrete Masonry Units, ASTM C90, normal weight or medium weight, 11.7MPa (1,700 psi) compressive strength.

4. Clay Masonry Units: Standard shape, size, color, texture, and material to match existing masonry construction; ASTM C216, Grade SW.

5. Mortar Mixes:

a. Measurement and Mixing:

1) Measure cementitious and aggregate materials in dry condition by volume or equivalent weight.

2) Do not measure by shovel; use known measure.

3) Mix materials in clean mechanical batch mixer.

03.20.21 REMOVALS & RENOVATION WORK 02072 - 3

b. Mixing Repair Mortar:

1) Thoroughly mix cementitious and aggregate materials together before adding water.

2) Mix again adding only enough water to produce damp, unworkable mix which will form when pressed into ball.

3) Maintain mortar in this dampened condition for one to two hours.

4) Add remaining water in small portions until mortar of desired consistency is reached.

5) Use mortar within thirty minutes of final mixing.

6) Do not retemper or use partially hardened material.

c. Admixtures: Do not use admixtures in mortar.

3.01 EXAMINATION:

A. Examine existing building and existing roofing to determine existing physical conditions that affect removal of existing roofing and installation of new roofing.

B. Verify that required barricades and other protective measures are in place.

3.02 PREPARATION:

A. Take measures to maintain watertight conditions during term of Contract.

B. Install interior protection and dust partitions where deck penetrations shall be removed or replaced.

3.03 REMOVAL OPERATIONS:

A. Execute demolition in careful and orderly manner with least possible disturbance or damage to adjoining surfaces and structure.

B. Avoid excessive vibrations in demolition procedures that would be transmitted through existing structure and finish materials.

C. Roof Removal:

1. Only remove as much existing roofing in day that new replacement roofing can be installed on the same day.

2. Remove existing roofing, and flashings; abandoned and obsolete equipment;

pitch pans, vents, curbs, and other such items; and sheet metal down to roof deck.

3. Do not stockpile debris on roof surface. Promptly dispose of obsolete equipment and debris at authorized disposal site each day. Use chutes to transfer debris from roof surface to dumpsters.

4. Provide protective method, such as plywood set on minimum 25mm (1-inch) EPS insulation, when hauling debris over existing roof membrane.

3.04 RENOVATION WORK:

A. Prepare substrates in accordance with roofing manufacturer's recommendations.

B. Concrete Decking:

1. Perform repairs to concrete deck in accordance with patching material manufacturer's recommendations.

2. Apply rust inhibitor to exposed rebar.

03.20.21 REMOVALS & RENOVATION WORK 02072 - 4

3. Remove loose and defective concrete.

4. Patch spalled areas and exposed rebar areas with non-shrink grout.

5. Trowel smooth the properly placed grout.

6. Seal cracks and/or joints in concrete deck with modified bitumen membrane prior to installation of new roof materials.

7. Cover holes or openings 300mm (12-inches) in diameter or smaller with a plate of 18 gauge sheet metal. Extend plate minimum 100mm (4-inches) beyond edge of hole and onto adjacent unaffected rib. Holes or openings greater than 12-inches by 12-inches (300mm by 300mm), frame opening with 2X wood nailers with intermediate spanning members spaced 16-inches (400mm) on-center. Install plywood flush with top of deck. Provide finish on bottom side of opening to match adjacent finish in exposed areas.

C. Nailers:

1. Replace damaged or deteriorated wood nailers and curbs with new nailers and curbs. Install new nailers on all copings and dividing walls.

2. Clean and prepare existing surfaces to receive wood nailers and curbs.

3. Install wood nailers and curbs continuously with 6mm (1/4-inch) gap between each section. Set level and true. Pre-drill nailers prior to attachment.

4. Securely fasten to structure with appropriate fasteners to resist minimum 780N per 300mm (175 pounds per linear foot) force in any direction. Use of powder-actuated fasteners is prohibited. Place a fastener within 75mm (3-inches) of each end of each section of wood blocking.

5. Secure nailers to concrete deck with appropriate fasteners spaced 600mm (24-inches) on-center.

6. Secure nailers to wood substrate using nails 600mm (24-inches) on-center, staggered. Install nails on an angle.

7. Secure nailers with self-tapping steel fastener to steel angle, bar joist, or bulb-T if adequate substrate is not present.

8. If attaching wood nailer to vertical masonry wall, utilize appropriate anchors spaced 300mm (12-inches) on-center.

9. Reduce fastener spacing 50 percent at a distance of 3m (10 feet) from each corner of roof.

D. Equipment and Curb Renovation:

1. Remove, retain, and reinstall existing equipment to facilitate new flashing.

2. Securely fasten equipment on new support and divider wallss after new flashing is installed.

3. Parapet wall and dividing wall flashing height shall be 200mm (8-inches) minimum above newly finished roof surface.

E. Rooftop Equipment:

1. Move and elevate rooftop equipment as required to install roofing materials.

2. When units or equipment are to be moved, disconnect and move to protected area to prevent damage to parts or components. Reset and reconnect at Contractor's expense.

F. Chimney to be Removed:

1. Demolish masonry and concrete chimney to deck elevation. Remove masonry, concrete and reinforcing steel utilizing appropriate equipment (i.e.

jackhammers, saws, etc.).

G. Solar Hot Water Lines: Raise and reroute existing water lines and supports as required.

03.20.21 REMOVALS & RENOVATION WORK 02072 - 5

Provide positive drainage of piping. Reinstall existing and install new water lines at existing or new points of connection.

H. Piping and Conduit Modifications:

1. Schedule piping and unit downtime for equipment modifications to coordinate with Embassy's operations. Switchover time shall be limited to meet Embassy's requirements.

2. Replace existing supports for units and associated piping with new supports.

3. Provide temporary supports to maintain unit and piping in operational condition except during switchover.

4. Furnish new fittings, piping, and accessories to match existing to replace deteriorated, damaged, or non-functional components or to accommodate new unit elevation, where necessary.

I. Piping Supports:

1. Furnish and install new supports for piping (conduit, gas, water, condensate, etc.).

2. Install supports at maximum spacing of 3m (10 feet) on-center and within

600mm (2 feet) of changes in plane or direction. Space supports for piping 250mm (10-inches) in diameter or larger and multiple pipes 2.4m (8 feet) on-center.

3. Install over new concrete pavers.

J. Plumbing Vents:

1. Extend plumbing vents or modify as necessary to accommodate new roof installation.

2. Provide pipe extensions and couplings where necessary to achieve minimum 200mm (8-inch) height above top of newly finished roof surface.

3. Utilize same material type and size as existing for new extension.

K. Masonry Dividing Wall Installation:

1. Install masonry at perimeters of roof changes in elevation.

2. Fit masonry into bonding pattern required. If cutting is required, use motor driven saw designed to cut masonry with clean, sharp, unchipped edges.

3. Install new 12mm (1/2-inch) diameter steel dowels in concrete deck at 400mm

(16-inches) on-center, or at alternating open cells in CMU or brick joints.

4. Lay masonry with completed filled bed, head, and collar joints. Butter ends with sufficient mortar to fill head joints and shove into place. Wet masonry using wetting methods that ensure units are nearly saturated but surface dry when laid.

5. Tool exposed mortar joints flush. Maintain joint widths.

6. Fill open cells with grout flush with top of concrete masonry units.

3.05 CLEANING:

A. Materials, equipment, and debris resulting from demolition operations shall become property of Contractor. Remove and dispose of demolition debris in accordance with applicable city, state, and federal laws at authorized disposal site.

B. Leave substrate clean and dry, ready to receive roofing system.

03.20.21 PROTECTED MEMBRANE ROOFING 07525 - 1

SECTION 07525 - PROTECTED MEMBRANE ROOFING ASSEMBLY

A. Installation of new two-ply APP modified bitumen roof system and related flashings in a Protected Membrane Roof assembly [PMR] over concrete deck.

B. Installation of new slip sheet, drainage course, filter fabric, and concrete pavers over modified bitumen roof area.

1.02 RELATED SECTIONS:

A. 02072 - Minor Demolition and Renovation Work.

B. 07530 - Plaza Deck Membrane Roofing C. 07600 - Sheet Metal Flashing and Trim for Roofing.

1.03 REFERENCES:

A. American Society for Testing and Materials (ASTM).

1.04 SUBMITTALS:

A. Product Data: For each type of product indicated.

B. Samples:

1. Smooth membrane and Mineral-granule-surfaced membrane sheets.

3. Drainage Course

4. Filter Fabric

5. Paver

C. Manufacturer Certificates: Signed by roofing manufacturer certifying that roofing system complies with requirements specified.

D. Warranties.

E. Obtain written approval from the manufacturer for any materials not manufactured or provided by manufacturer stating that materials are acceptable and are compatible with other materials and systems required.

1.05 QUALITY ASSURANCE:

A. Application:

1. Approved by manufacturer of accepted roofing system.

2. A single applicator with a minimum of five years previous successful experience in installations of similar systems.

B. Regulatory Requirements:

1. Federal regulations, safety standards, and codes mandated in the United States.

2. Products Manufactured in Countries Outside of United States: Products shall be approved by governing/sanctioning entity for country in which project is located and/or product is manufactured.

3. Classified by Underwriters' Laboratories, Inc. as a Class A roof covering

4. Classified by Factory Mutual Engineering as a Class I, 1-60 approved assembly

5. Install in accordance with manufacturer's current published application procedures of the National Roofing Contractors Association.

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C. Make no deviations from this Specification or the approved shop drawings without prior written approval of COR and roof membrane manufacturer.

D. Perform entire work of this Section in accordance with the best standards of practice relating to the trades involved.

1.06 DELIVERY, STORAGE, AND HANDLING:

A. Deliver materials in manufacturer's original, unopened containers or packages with labels intact and legible.

B. Store materials in accordance with manufacturer's recommendations. Store rolled goods up on roll ends on clean raised platforms. Store other materials in dry area, protected from water and direct sunlight, and maintain at a temperature of 16 to 27 degrees Celsius (60 to 80 degrees Fahrenheit).

C. Provide continuous protection of materials against deterioration.

D. Materials Stored on Roof Levels for Immediate Use:

1. Distribute to prevent concentrated loads that would impose excessive strain on deck or structural members.

2. Positively secure to prevent displacement by wind.

3. Cover with plastic sheeting for protection from exposure.

1.07 PROJECT CONDITIONS:

A. Existing Conditions: Examine existing building and existing roofing and decking to determine physical conditions that affect removal of existing roofing and installation of new roofing and decking.

B. Environmental Requirements:

1. Apply roofing in dry weather.

2. Do not expose membrane and accessories to a constant temperature in excess of 82 degrees Celsius (180 degrees Fahrenheit).

C. Protection:

1. Provide special protection or avoid heavy traffic on completed work when ambient temperature is above 26 degrees Celsius (80 degrees Fahrenheit).

2. Restore to original condition or replace work or materials damaged during handling of roofing materials.

D. Emergency Equipment: Maintain on-site equipment necessary to apply emergency temporary edge seal in the event of sudden storms or inclement weather.

E. A minimum of two fully charged 9.072 kg (20-pounds) dry chemical fire extinguishers in separate, easily accessible torch work locations at all times.

1.08 SEQUENCING AND SCHEDULING:

A. Do not install more roofing in one day than can be night sealed with roofing and flashing in the same day.

1.09 WARRANTY:

A. Roofing Material Manufacturer's Ten Year Warranty: Install in such a manner that the roof system manufacturer will furnish a written warranty agreeing to replace/repair defective materials, including leakage of water, abnormal aging or deterioration of materials, and other failures of the materials to perform as required within warranty period.

B. Contractor's Five Year Workmanship Warranty: In addition, furnish a written warranty agreeing to repair/replace defective installation and workmanship labor causing leakage

03.20.21 PROTECTED MEMBRANE ROOFING 07525 - 3

of water, deterioration of materials, and other failures of the installed system, sealants, painting, coatings, and related work on this project, to perform as required within the warranty period.

2.01 MANUFACTURER:

A. Acceptable Roofing Manufacturers:

1. Firestone Building Products Company.

2. GAF Materials Corporation.

3. Polyglass USA, Inc.

4. Or approved equal.

2.02 SHEET MATERIALS:

A. Membrane Base Ply: Smooth surfaced, polyester or fiberglass reinforced, torch-applied APP modified bitumen sheet.

1. “APP170” by Firestone

2. “Ruberoid Torch Smooth” by GAF

3. “PolyFlex” by PolyGlass.

B. Membrane Top Ply: Smooth-surfaced, polyester or fiberglass reinforced, torch-grade, APP modified bitumen sheet.

1. “APP170” by Firestone

2. “Ruberoid Torch Smooth” by GAF

3. “PolyFlex” by PolyGlass.

C. Base Flashings: Base Ply/Strip-in: Smooth-surfaced torch-grade, APP sheet

1. “APP170” by Firestone

2. “Ruberoid Torch Smooth” by GAF

3. “PolyFlex” by PolyGlass.

D. Base Flashing: Top Ply: Granule-surfaced torch grade, polyester or fiberglass reinforced APP modified bitumen sheet, white in color.

1. “APP 180 FR” by Firestone,

2. “Ruberoid Torch FR” by GAF,

3. "PolyFlex G FR" by PolyGlass,

2.03 RELATED MATERIALS:

A. Cementitious Cant: Quick-set cementitious non-shrink, non-metallic grout installed in "dry pack" to form cants.

1. "Sonogrout 10K" by Sonneborn.

B. Termination Bar: 3mm (1/8-inch) thick, 25mm (1-inch) wide extruded aluminum bar with flat profile, factory punched oval holes 6mm by 9mm (1/4-inch by 3/8-inch) spaced at 150mm (6-inches) on-center, such as "TB 125" by The TruFast Corp. or “Heavy Flat Bar” by Olympic.

C. Asphalt Primer: ASTM D 41.

D. Edge Sealant: Rubberized asphaltic plastic roof cement that is gun-grade version for sealing top edges of base flashings and terminations of cap sheet.

1. “Elastomastic 209” by Henry Co.

2. “Ruberoid” by GAF

3. “BlackJack 1010” by Gardner-Gibson

03.20.21 PROTECTED MEMBRANE ROOFING 07525 - 4

E. Elastomeric Plastic Roof Cement: Rubberized plastic roof cement/adhesive that is trowel-grade; to be used for temporary seals of flashings and three coursing of seams and cuts in modified bitumen sheets.

1. “Ruberoid” by GAF,

2. “MBR Utility Cement” by Johns Manville

3. “MB Gold Elastomeric Flashing Cement” by Monsey

4. "PA-1021" by Siplast,

2.04 PROTECTED MEMBRANE MATERIALS:

A. Slip Sheet: 0.5mm (20 mil) polyethylene sheeting, clear or black in color.

B. Prefabricated Drainage Course: A composite system consisting of a three-dimensional, crush-proof, drainage polymeric dimpled core and a non-woven filter fabric bonded to the core dimples, and a polymeric protective film adhered to the back of dimpled core.

1. “Miradrain 6200” by Mirafi Moisture Protection Products

2. "J-Drain 420" by JDR Enterprises

3. "Ameridrain 500" by American Wick Drain Corp.

C. Loose Laid Insulation: Extruded polystyrene foam board, 24 to 26 kg/m3 density, 276 kN/m2 (40 psi) compressive strength, ASTM C-578-85, 600mm by 2,400mm (24-inch by 96-inch) sized boards with tongue and groove channels alongside edges of panels. Two layers of 100mm (4 inch) insulation.

1. "Styrofoam Roofmate” by Dow Chemical Co.

2. DiversiFoam Products.

3. Owens Corning.

4. Tenneco Building Products.

D. Filter Fabric: Non-woven polyester filter fabric, weight 140 g/m2, white color, UV stable.

1. “Typan” by Dupont

2. "Poly Separation Layer" by GAF.

E. Precast Concrete Paver Ballast:

1. Nominal size 300mm by 300mm by 50mm (12-inch by 12-inch by 2-inch).

2. Compressive strength of 20,670 kN/m2 (3000 psi).

3. Non-skid top finish free of voids, smooth bottom finish with beveled or rounded bottom edges and corners free of fins and projections.

4. Natural concrete color (suave grey).

PART 3 - EXECUTION

3.01 EXAMINATION OF SURFACES:

A. Contractor shall examine the substrate, roof deck, and related surfaces and verify that there are no conditions such as inadequate anchorage, foreign materials, moisture, ridges, or other conditions, which would prevent the satisfactory installation of the roofing system.

B. Correct or complete any condition requiring correction or completion prior to the installation of the roofing system. Notify COR in writing of unacceptable conditions.

A. Do not stockpile debris on roof surface.

B. Promptly remove debris each day. Use hoist or chute to transfer debris from roof surface to disposal container.

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C. Cleaning:

1. Verify that debris has been completely removed.

2. Broom clean concrete deck immediately prior to roofing application.

3.03 MEMBRANE APPLICATION:

A. Prior to roof membrane installation, seal all openings, projections, and penetrations in the substrate to prevent bitumen migration into the building. Correct damage to the building or interior components caused by bitumen migration at Contractor’s own expense.

B. Membrane Installation-General:

1. Apply roofing in accordance with roofing system manufacturer's instructions and the following requirements. Application of roofing shall immediately follow application of base sheet as a continuous operation.

2. Aesthetic Considerations: The overall appearance of the finished roof application is a standard requirement for this project. Make necessary preparations, utilize recommended application techniques, apply specified materials, and exercise care to ensure a finished application.

3. Form cementitious cants on top of substrate at walls and curbs prior to application of roofing. Mix and install cementitious material in accordance with manufacturer's recommendations. Install cants to form transition from horizontal to vertical substrates and continuous at corners.

4. Priming: Prime concrete, and masonry surfaces, top and bottom of metal substrates, flanges, and appurtenances with a uniform coating of asphalt primer, at a nominal rate of 0.41 l/m2 (one gallon per 100 square feet).

5. Roofing Application: Lay all layers of roofing free of wrinkles, creases, or fishmouths. Exert sufficient pressure on the roll during application to ensure prevention of air pockets.

6. Lay layers of roofing perpendicular or parallel to the slope of the deck as recommended by manufacturer.

C. Membrane Base Ply Application:

1. Allow sheets to relax prior to application. Maximum length of sheet shall be 5 meters (15 feet).

2. Beginning at the low point of the roof, only covering half the drain, fully adhere the modified bitumen sheet to the substrate. Maintain a steady torching technique to ensure that the entire bottom surface of the sheet achieves the proper temperature for adhesion. Keep the roll in close proximity to the torch technician. Exert sufficient pressure on roll during application.

3. Apply heat evenly across the face and full width of the roll while unrolling roll uniformly with an even downward pressure. Apply torch flame to roll until the bitumen back coating reaches the design application temperature, resulting in melting of the burn-off film, a glossy appearance of the back coating, and a 6mm (1/4-inch) to 13mm (1/2-inch) bitumen flow from edge of sheet.

4. Provide a minimum of 75mm (3-inch) side laps and 150mm (6-inch) end laps.

Stagger end laps of adjacent sheets of membrane base ply a minimum of 1m (3 feet). Extend field sheet of membrane base ply to top edge of cant.

5. Align side lap of base ply over mid-point or center of roof drain.

6. Complete membrane base ply application over respective roof area prior to application of membrane top ply. Apply additional ply of membrane base ply in low areas or areas that may be subjected to ponding water.

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7. Apply a patch over areas of membrane with areas of physical damage or other defects. Patch shall be the full width of membrane base ply and extend a minimum of 50mm (2-inches) beyond the defect in each direction.

8. Check lap seams and seal unbonded or discontinuous seams using a heated steel trowel.

D. Metal Flange Flashing (Pitch Pans, Metal Edge, Pipe Boxes, Vent Stacks, etc.):

1. Prime top and bottom of metal flanges and components completely and allow to dry prior to installation.

2. After membrane base ply has been applied, install metal flange flashings. Strip-in flange/metal with strips of base flashing (base ply) extending a minimum of 100mm (4-inches) beyond edge of flange/metal.

E. Base Flashing Application - Base Ply:

1. Install and complete application of base ply of flashing each day the base ply of membrane is installed.

2. Install first ply of base flashing extending horizontally 100mm (4-inches) beyond edge of cant or flange and vertically 100mm (4-inches), minimum above the top of the cant.

3. Length of base flashings shall be maximum 2m (6-feet). Lap ends of base flashings 100mm (4-inches), minimum. Seal top edge of base flashing on a daily basis with a continuous troweling of elastomeric roof cement.

4. Check lap seams and seal unbonded or discontinuous seams using a heated steel trowel.

F. Membrane Application - Top Ply:

1. Unroll sheet and cut into 5m (15-feet) lengths. Lay cut sections of sheet down to allow sheet to relax prior to application.