RFQ for Roof Replacement 10-246.pdf

Embassy of the United States of America Lilongwe, Malawi

August 2023

Subject: Request for Proposals for Roof Replacement at U.S. Government owned residence 10/246 Reference number: PR11666004

Dear Prospective Offeror:

The U.S. Embassy in Lilongwe, Malawi is seeking proposals from Contractors to undertake Roof

Replacement Project at a U.S. Government owned residence located at 10/246

Enclosed Is RFP for the 10/246 renovation projects. If you would like to submit quotation, please review the enclosures and follow the attached Bid Instructions.

The Embassy particularly welcomes and will give special consideration to proposals from general contractors interested in a related project for replacing the roof at 10/246 issued under a separate Request for Proposal (RFP).

The Embassy also welcomes and will give special consideration to proposals from contractors with a demonstrated ability and willingness to undertake additional restoration projects we expect to launch in the coming months across our portfolio of U.S. Government owned residences.

The Embassy intends to conduct a pre-proposal conference at the site to discuss and clarify conditions and requirements. The pre-proposal conference will be held on August 16*^ 2023 at 14:00 at 10/246. Prospective offerors/quoters should contact the U.S. Embassy Lilongwe GSO Procurement office (LilongweGSOProcurement(5)State.gov) for additional information or to arrange entry to the residence.

Proposals are due by September 4^^ at 14:00. No proposals will be accepted after this time. Proposals must be In English and incomplete proposals will not be accepted.

Your proposal must be submitted electronically to LilongweGSOProcurement@State.gov.

The U.S. Government intends to award a contract/purchase order to the qualified contractor submitting an acceptable offer at the lowest reasonable price. We expect to award a contract/purchase order based on Initial proposals without holding post-submission discussions, although we may hold such discussions with companies in the competitive range if there is a need to do so.

Offerors must be registered or In the process of registering in the SAM.gov (System for Award Management) database at https://www.sam.gov prior to submittal of their offer/proposal as prescribed under U.S. Federal Acquisition Regulation (FAR) 4.1102. Failure to be registered at time of evaluating proposals may deem the offeror's proposal to be considered non-responsible and no further consideration will be given. Therefore, offerors are highly encouraged to initiate registration immediately if they are interested in submitting a response to this requirement.

We welcome your interest in working with the U.S. Embassy in Lilongwe and look forward to reviewing your proposal.

Sincerely, Mark Palermo

Contracting Officer Enclosures:

Attachment 1 SF18/OF347 Attachment 2 Statement of Work

Attachment 3 Specifications Attachment 4 Bid Instructions and Award Criteria

Attachment 5 Price Proposal Attachment 6 Representations and Certifications

Contract ClausesAttachment 7

OF PAGESPAGE

REQUEST FOR QUOTATION

(THIS IS NOT AN ORDER)

X IS NOT A SMALL BUSINESS SET-ASIDEISTHIS RFQ

1 14

RATING4. CERT. FOR NAT. DEF.

UNDER BDSA REG. 2

AND/OR DMS REG. 1

3. REQUISITION/PURCHASE REQUEST NO.,2. DATE ISSUED

05/08/2023

1. REQUEST NO.

PR11666004 ►

6. DELIVER BY (Date)5a. ISSUED BY

AREA 40 / PLOT 24 KENYATTA DRIVE, BOX

30016. ATTN: GSO/PROCUREMENT

LILONGWE 3

MALAWI

7. DELIVERY5b. FOR INFORMATION CALL (NO COLLECT CALLS)

OTHER

FOB DESTINATION X (See Schedule)TELEPHONE NUMBERNAME

9. DESTINATIONNUMBERAREA CODE

a. NAME OF CONSIGNEE+265 884 773 166Lilongwe GSO Procurement U.S. Embassy Lilongwe8. TO:

b. STREET ADDRESS

AREA 40 / PLOT 24 KENYATTA DRIVE,

b, COMPANYa, NAME

c. CITY

Lilongwe

c. STREET ADDRESS e, ZIP CODEd. STATEf, ZIP CODEe. STATEd. CITY

IMPORTANT: This Is a request for Information and quotations furnished are not offers. If you are unable to quote, please so indicate on this form and return it ‘o the address in Block 5a, This request does not commit the Government to pay any costs incurred in the preparation of the submission of this quotation or to contract for supplies or service. Supplies are of domestic origin unless otherwise indicated by quoter. Any representations and/or certifications attached to this Request for Quotation must be completed by the quoter.

10. PLEASE FURNISH QUOTATIONS TO THE

ISSUING OFFICE IN BLOCK 5a ON OR BEFORE CLOSE OF BUSINESS (Date)

March 22nd 2023, Not later than 12:pm

11. SCHEDULE (Include applicable Federal, State and local taxes)

AMOUNTUNIT PRICEUNITQUANTITYSUPPLIES/ SERVICESITEM NO.

(f)(e)(d)(0)(b)(a)

Request for Proposals for Roof Replacement works at U S Government owned residence 10/246

d. CALENDAR DAYSa. 10 CALENDAR DAYS '%) b. 20 CALENDAR DAYS (%) c. 30 CALENDAR DAYS (%)

► PERCENTAGENUMBER

12. DISCOUNT FOR PROMPT PAYMENT

1 are not attached.

114. SIGNATURE OF PERSON AUTHORIZED TO

SIGN QUOTATION

1 areNOTE: Additional provisions and representations

15. DATE OF QUOTATION13. NAME AND ADDRESS OF QUOTER

a. NAME OF QUOTER

16. SIGNERb. STREET ADDRESS

b. TELEPHONEa. NAME (Type or print)

AREA CODE

c. COUNTY

NUMBERc. TITLE (Type or print)e. STATE f. ZIP CODEd. CITY

STANDARD FORM 18 (REV. 6-95)

Prescribed by GSA-FAR (48 CFR) 53.215-1(a)

AUTHORIZED FOR LOCAL REPRODUCTION

Previous edition not usable

RESIDENCE 10/246 ROOF REPLACEMENT

LILONGWE. MALAWI

Embassy of the United States of America

Lilongwe, Malawi

Statement of Work

FOR REPLACING THE ROOF AT RESIDENCE 10/246

The U.S. Embassy Lilongwe offers the following Statement of Work for consideration, bidding, and upon bid acceptance as a list of required activities in the performance of the Contract.

1. INTRODUCTION

The Statement of Work involves replacing the roof at a U.S. government residence located at 10/246. The U.S. Embassy Facilities Section will be involved in the execution and coordination of this project with the contractor.

A.

Location of the project: 10-246 (U.S. Property ID# 98534)B.

Pre-Bid Meeting:

As noted in the Solicitation, there will be a pre-bid meeting to verify conditions, materials, and requirements.

C.

Contract Administration:

Contracting Officer:

Mark S. Palermo, General Services Officer

PalermoMS(S)state.gov Mobile Number: 0888760176

D.

Contracting Officer Representative:

Gregory Buie, Assistant Facility Manager BuieGA(5)state.ROv, Mobile Number: 0883430308

Facilities Staff Representative:

Nyson Lozani, Flead Carpenter LozaniNM(5)state.gov, Mobile Number: 0882265112.

Page 1ROOF REP .ACEMENTJuly 2023

LILONGWE, MALAWI

2. SUMMARY OF CONDITIONS AND WORK:

The U.S. Embassy Lilongwe has a requirement to replace the roof of

Residence 10/246.

The existing 357 square meter roof assembly is "Harvey Tile" metal roof panels to simulate tile on timber roof structure. The roof slopes are an average pitch of 3 in 12. The Harvey Tile surface sits atop a metal sheeting underlayment. Neither the Harvey Tile nor the underlayment are watertight due to deterioration of the materials and or poor design and installation of the roof.

The Specifications call for removal of the existing roof and installation of new Klip-Lok 700 roof panels and appropriate substrate.

The one-story Residence was constructed with reinforced concrete slab with unreinforced masonry walls. The masonry walls are finished with cement stucco and painted.

The work includes but is not limited to the following;

Removal and disposal of existing roof metal "Harvey tile" and substrate, associated metal perimeter and chimney flashings, gutters, and downspouts.

Salvage wood fascia, eave boards, soffits, and wood purlins on framing.

Repair/Replace existing wood purlins and framing as needed.

Installation of new insulation in attic spaces.

Installation of reflective foil faced underlayment.

Installation of new Klip-Lok 700 substrate and metal roof panels.

Installation of new flashings at penetrations, chimney, and perimeters.

Painting of all wood fascia, eave boards, and soffits, installation of new gutters and downspouts.

Work shall be executed in conformance with this SOW, the attached

Specifications, the attached Drawings and Details, and the Contract Terms and Conditions. If there is a conflict between the documents, the

Contractor shall follow the more stringent requirement.

The Contractor will provide all materials, tools, equipment, vehicles, and qualified personnel necessary to complete this work.

A.

B.

C.

D.

E.

1.

2.

3.

4.

5.

6.

7.

8.

9.

F.

G.

3. GENERAL REQUIREMENTS

PRECONSTRUCTION CONFERENCE: A preconstruction conference will be held on or around 10 days after contract award at U.S. Residence number

10/246 to discuss the schedule, submittals, notice to proceed, mobilization and other important issues that affect construction progress (FAR 52.236-

26, Preconstruction Conference).

PERMITS AND RESPONSIBILITIES: The Contractor shall, without additional expense to the Government, be responsible for obtaining any necessary licenses and permits for its work on the project, and for complying with any applicable laws, codes, and regulations applicable to the performance

A.

B.

ROOF REPLACEMENT Page 2July 2023 of the work. The Contractor shall also be responsible for all damages to persons or property that occur as a result of the Contractor's fault or negligence. The Contractor shall also be responsible for all materials delivered and work performed until completion and acceptance of the entire work, except for any completed unit of work which may have been accepted under the contract. (FAR 52.236-7) OTHER CONTRACTS: The Government may undertake or award other contracts for additional work at or near the site of the work under this contract. The Contractor shall fully cooperate with the other contractors and with Government employees and shall carefully adapt scheduling and performing the work under this contract to accommodate the additional work, heeding any direction that may be provided by the Contracting

Officer. The Contractor shall not commit or permit any act that will interfere with the performance of work by any other contractor or by

Government employees. (FAR 52.236-8)

C.

4. SUBSTITUTIONS AND PRODUCT OPTIONS

OR-EQUAL CLAUSE":

References in the Specifications/Statement of Work to materials, products or equipment by trade name, make, or catalog number, or to snecific processes, shall be regarded as establishing a standard of quality and shall not be construed as limiting competition. The Contractor may propose for approval or rejection by the COR the substitution of any material, product, equipment or process that the Contractor believes to be equal to or better than that named in the

Specifications/Statement of Work, unless otherwise specifically provided in this contract.

Request for substitution constitutes a representation that

Contractor:

A.

1.

2.

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

Shall provide same warranties for substitution as for product specified.

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.

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

PRIOR APPROVAL REQUIRED

The Contractor must receive approval in writing from the COR before substitutions (1) proposed by the Contractor but not yet

1.

Page 3ROOF REPLACEMENTJuly 2023 approved at the time of execution of the contract, or (2) proposed by the Contractor after execution of the contract may be used in the project.

Sufficient information to permit evaluation by the Government must accompany any substitution request including but not limited to the reasons for the proposed substitution and data concerning the design, appearance, performance, composition, and relative cost of the proposed substitute.

The Contractor shall make requests for substitutions in a timely manner to permit adequate evaluation by the Government.

If, in the COR's opinion, the use of such substitute items is not in the best interests of the Government, the Contractor must obtain the items originally specified with no adjustment in the contract price or completion date.

APPROVAL THROUGH SHOP DRAWINGS: The Contractor may propose substitutions of materials in the submittal of shop drawings, provided such substitution is specifically requested in writing in the transmittal of the shop drawings to the COR. Such substitution requests must be made in a timely manner and supported by the required information.

FINAL APPROVAL ON DELIVERY: Acceptance or approval of proposed substitutions under the contract are conditioned upon approval of items delivered at the site or approval by sample. Approval by sample shall not limit the Government's right to reject material after delivery to the site if the material does not conform to the approved sample in all material respects.

2.

3.

4.

C.

D.

5. ANTICIPATED PERIOD OF PERFORMANCE

Solicitation & Award of Contract:

Pre-Proposal Site Visit:

Award:

Pre-Construction Submittals:

Insurance & Bonding:

Schedule & Product Data:

OBO & Embassy Approval:

Material Procurement:

Crew Information:

Mobilization & Construction:

Main Effort:

Final Clean-Up:

A.

1.

2.

B.

1.

2.

3.

4.

5.

C.

1.

2.

10-20 days prior to Award

Zero Day

15 days after Award

30 days after Award

20 days after submittal

90 days after approval

5 days before commencement of work

60 days

5 days prior to completion

TOTAL PERIOD of PERFORMACE: 205 daysD.

6. SCHEDULE

Page 4ROOF REPLACEMENTJuly 2023

4^

SPECIFICATIONS

RESIDENCE 10/246 ROOF REPLACEMENT

April 12, 2023

U.S. EMBASSY

LILONGWE, MALAWI

^ A

ROOF & FACADE MANAGEMENT PROGRAM

FACILITY MANAGEMENT

OVERSEAS BUILDINGS OPERATIONS

U.S. DEPARTMENT OE 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. **

SPECIFICATIONS

SECTION 00003 - TABLE of CONTENTS

Division 1

01010 - Summary of Work

01022 - Site Photographs

Division 2

02072 - Roof Removals and Renovation Work

Division 3-5 Not Used

Division 6

06120 - Rough Carpentry

Division 7

07410 - Sheet Metal Roof Panels

07620 - Sheet Metal Flashing

Division 8- Not Used

Division 9

09920 - Exterior Painting

END OF TOC

A.

April 2023 SUMMARY OF ROOF WORK 01010 - 2

SECTION 01010 - SUMMARY OF ROOF WORK

1.01 SUMMARY:

The U.S. Embassy Lilongwe and Overseas Buildings Operations [OBO] has a requirement to replace the roof of the existing Residence No. 10/246 as dgiscribed in the attached Statement of Work and these Specifications.

A.

It is anticipated that this work will be executed in coordination with a separate but related project for other miscellaneous renovations at this same residence.

B.

01010-3April 2023 SUMMARY OF ROOF WORK

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.

END OF SECTION

April 2023 SITE PHOTOGRAPHS 01022 -1

SECTION 02072 - ROOF REMOVALS AND RENOVATION WORK

PART ONE-GENERAL

1.01 SECTION INCLUDES:

Removal and disposal of existing roof metal tiles and metal flashings to wood purlins and framing.

Remove existing gutters and downspouts.

Installation of new insulation in attic spaces.

A.

B.

C.

1.02 PROJECT CONDITIONS:

Only remove as much roofing in one-day as can be replaced and/or made watertight within the same day.

Environmental Requirements:

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

When ambient temperature is below 15 degrees Celsius (60 degrees Fahrenheit), expose only enough cement and adhesive required withj^n four hour period.

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

A.

B.

1.

2.

C.

1.03 SEQUENCING AND SCHEDULING:

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

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.

A.

B.

PART TWO - PRODUCTS

2.01 MATERIALS:

A. Mineral-Wool Blanket Attic Insulation: Un-faced (blankets without membrane ASTM C 665, Type I consisting of fibers; with maximum flame-spread and developed indexes of 25 and 50, respectively, per ASTM E 84; passing ASTM E combustion characteristics. Isover Aerolite insulation or approv^equivalent facing);

smoke-

136 for

PART THREE-EXECUTION

3.01 EXAMINATION:

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

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

A.

B.

April 2023 REMOVALS AND RENOVATION WORK 02072 -1

3.02 PREPARATION:

Take measures to maintain watertight conditions during term o^Contract.

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

Protect adjacent surfaces.

A.

B.

C.

3.03 REMOVAL OPERATIONS:

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

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

Roof Removal:

A.

B.

C.

1. Demolish and remove existing construction to the extent required by the project.

Locate selective removal equipment throughout the structure and remove debris and materials so as not to impose excessive loads on supporting walls, floors, or framing.

Remove existing roofing, insulation, and flashings; abandoned and obsolete equipment; pitch pans, vents, curbs, and other such items; and sheet metal down to roof rafters.

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.

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

2.

3.

4.

5.

3.04 RENOVATION WORK:

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

Plumbing Vents:B.

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

1.

2. Provide pipe extensions and couplings where necessary to achieve minimum

200mm eight above top of newly finished roof surface.

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

April 2023 REMOVALS AND RENOVATION WORK 02072 - 2

INSTALLATION OF INSULATION IN CEILINGFRAMEDCONSTRUaiON

Use insulation widths and lengths that fill the cavities formed by ceiling framing members. If more than one length is required to fill the cavities, provide lengths that will produce a snug fit between ends.

Loose lay insulation in cavities formed by framing members to fit between edges of insulation and adjoining framing members.

Maintain 75mm (3-inch) clearance of insulation around recessed lighting fixtures not rated for or protected from contact with insulation.

Protect installed insulation from damage due to harmful weather exposures, physical abuse, and other causes.

A.

4-

B.

C.

D.

3.06

3.07 CLEANING:

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 sit^

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

A.

B.

END OF SECTION

April 2023 REMOVALS AND RENOVATION WORK 02072 - 34

SECTION 06120 - ROUGH CARPENTRY

PART ONE-GENERAL

1.01 SECTION INCLUDES:

Required minor repair of warped, deteriorated, and non-salvageable framing.

Replace deteriorated miscellaneous wood "sacking", nailers, trim, fascia, and blocking.

Miscellaneous framing as indicated and as necessary to provide proper substrate for metal roof system and flashings.

A.

B.

C.

1.02 DELIVERY, STORAGE, AND HANDLING:

Store all materials up, off the ground, and covered with a weatherproof covering anchored sufficiently so as to resist wind blow-off.

Keep all materials clearly identified with all grade marks legible. Keep all damaged material clearly identified as damaged and store separately to prevent its inadvertent use.

Do not allow installation of damaged or otherwise non-complying material.

In the event of damage, immediately make all necessary repairs and replacements to the approval of Government's On-site Representative and at no additional cost to Owner.

A.

B.

C.

D.

PART TWO - PRODUCTS

2.01 MATERIALS:

A. Preservative Treatment for Wood Members, Nailers, and Blocking: Pressure preservative treated in accordance with AWPA C2 and C9 Standards, using ACQ or similar preservative at 6.41 Kg/m^ (0.40 pounds per cubic foot). Preservatives shall be compatible with roof underlayment.

Lumber:B.

1. Noncombustible Standard Grade Fir or No. 2 Southern Yellow Pine bearing UL label or suitable alternative available in southern Africa. Size shall be appropriate for application.

Moisture Content: 19 percent at the time of installation.

Lumber Sizes:

2.

3.

Rafters: Match existing.

Ridge and Hip Boards: Match Existing.

Wood Purlins: Match Existing.

Nailers: 38mm (1-1/2-inches) by 88mm (3-1/2-inches).

Fascia and Eave Boards: Match Existing a.

b.

c.

d.

e.

C. Fasteners:

1. Wood Substrate:

Securement of metal flanged items shall be nails. No. 10 gauge, galvanized steel wire with 10mm (13/32-inch) diameter head and ring shank such as No. 3255 by Dickson Weatherproof Nail Co. (800/572- 9351).

Securement of wood to wood shall be nails. No. 9 gauge, galvanized steel wire nail with ring shank and 8mm (5/16-inch) diameter head such as No.

a.

b.

April 2023 ROUGH CARPENTRY 06120 - 1

3055 by Dickson Weatherproof Nail Co. (800/572-9351); length required to provide 25mm (1-inch) penetration minimum into substrate.

Securement of exposed items to wood substrate shall be nails, No. 10 gauge, galvanized steel wire nail with 9mm (3/8-inch) diameter head, ring shank, and EPDM rubber washer such as No. 955 by Dickson

Weatherproof Nail Co. (800/572-9351); length required to provide 25mm

(1-inch) penetration minimum into substrate.

Fasteners for securing roofing materials to wood substrate shall be a hardened steel nail with a 25mm (1-inch) diameter round head and ring shank; length to provide 25mm (1-inch) penetration into substrate, as manufactured by Simplex Nail Co.

Fasteners for securing steel to wood substrate shall be steel wood screw with steel washer and integral rubber seal.

Masonry Substrate:

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 Him.

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.

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.

Steel Substrate:

c.

d.

e.

a.

b.

2.

3.

Fasteners for securing wood to steel substrate shall be self-drilling coated heavy duty screw, 6mm (1/4-inch) diameter (minimum), with 16mm

(5/8-inch) diameter washer such as "#14 Heavy Duty Screw" byOlympic.

Fasteners for securing steel to steel substrate shall be self-tapping steel screw with steel washer and integral rubber seal.

a.

b.

PART THREE - EXECUTION

3.01 WOOD ROOF FRAMING:

All construction shall be in accordance with the latest edition of the "timber construction manual" and latest supplements.

Contractor shall measure existing wood framing members to provide matching replacement members.

Rough carpentry: 1500 psi minimum fiber stress structural grade lumber, double headers at all openings, metal tie strap all rafters, Simpson orequal

A.

B.

C.

April 2023 ROUGH CARPENTRY 06120 - 2

3.02 ROOF PURLIN REPAIR:

Purlins shall be cut to size. Ends of adjoining purlins shall be beveled cut to fit snug.

Install purlins spaced to align metal roof panel fasteners up slope at all times.

Nail purlins at each support not to exceed 600mm in spacing.

Roofing supports are to be added as necessary to reach a maximum spacing of 600mm.

A.

B.

C.

D.

3.03 RIDGE AND HIP BOARD

Secure ridge boards at 300mm (12-inches) on-center with appropriate fasteners.

Secure ridge boards along ridges and hips, anchoring to substrate with appropriate fasteners installed in toe-nailed position, spaced 300mm (12-inches) on-center, and staggered, each side of nailer.

A.

B.

3.04 FASCIA AND EAVE REPAIR:

Verify secure fascia and eave to ends of rafters with appropriate fastener, spaced at top and bottom of rafter end, minimum 13 mm (1/2-inch) from end of rafter.

Ends of fascia shall be located over and at midpoint of rafter ends.

Paint fascia and eave boards upon completion of repair and installation.

A.

B.

C.

3.05 CLEAN UP:

A. Premises shall be kept in a neat and orderly condition.

After installation of all rough carpentry, contractor shall remove all construction debris and equipment from job site.

B.

END OF SECTION

April 2023 ROUGH CARPENTRY 06120-3

SECTION 07410 - METAL ROOF PANELS

PART ONE-GENERAL

1.01 SECTION INCLUDES:

Provide labor, materials, tools, and equipment for installation of metal roofing panels, associated trim, and flashings.

Provide related components, transitions, and accessories.

A.

B.

1.02 REFERENCES:

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

Federal Specifications (FS).

Underwriters Laboratories (UL).

Sheet Metal and Air Conditioning: Contractor's National Association, Inc. (SMACNA) Architectural Sheet Metal Manual.

National Roofing Contractor's Association: NRCA Roofing and Waterproofing Manual.

Metal Building Manufacturer's Association (MBMA).

B.

C.

D.

E.

F.

1.03 SUBMITTALS:

Shop Drawings: Submit complete shop drawings and details for review. Shop drawings show methods of installation and plans of roof panels, sections and details, flashings, roof curbs, vents, interfaces with materials, and proposed identification of component parts and their finishes.

Samples: Submit samples for proposed material. Submit one 300 mm (12-inch) long sample of proposed material.

A.

B.

1.04 QUALITY ASSURANCE:

A. Applicator:

Approved by manufacturer of accepted roof system.

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

Regulatory Requirements:

System shall be classified by Underwriter's Laboratories, Inc. as a Class A roof

1.

2.

1.

B.

covering.

Follow local, state, and federal requirements, safety standards, and codes.

Refer to applicable building codes for roofing system load design requirements. When a conflict exists, the more restrictive document will govern.

Installation:

2.

C.

D.

Install in accordance with manufacturer's current published application procedures and the general recommendations of the American Metal Roofing Association. Follow Underwriter's Laboratories requirements acceptable for use with specified products or systems.

All roofing shall be as described in this Section and shall be provided and/or approved by the roof system manufacturer. Any materials not manufactured or provided by manufacturer shall have written approval from the manufacturer stating that the materials are acceptable and are compatible with the other

1.

2.

April 2023 STANDING SEAM METAL ROOF PANELS 07410 - 1 materials and systems required.

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

Field Measurements: Where possible, prior to fabrication of prefabricated panels, take field measurements ofstructural or substrate to receive panel system. Allowfortrimming panel units where final dimensions cannot be established prior to fabrication.

Single-Source; Utilize coil/sheet produced by one manufacturer. Provide roof panels, flashing, and gutter profiles fabricated from material of a single manufacturer. Provide secondary materials which are acceptable to the manufacturer and panel fabricator.

E.

F.

G.

1.05 APPLICABLE STANDARDS:

UL580, "Tests for Uplift Resistance of Roof Assemblies;" Class 90.

ASTM E 1680, "Standard Test Method for Rate of Air Leakage Through Exterior Metal Roof Panel System".

ASTM E 1646, "Standard Test Method for Water Penetration Through Exterior Metal Roof Panel Systems"; no uncontrolled water infiltration.

A.

B.

C.

1.06 PROJECT CONDITIONS:

A. Protection:

Provide protection or limit traffic on the existing roof.

Provide protection of finish on metal panels during storage, installation, and construction.

Store and handle in strict compliance with manufacturer's instructions and recommendations.

Stack materials on platforms or pallets, covered with tarpaulins or other suitable weathertight ventilated covering. Slope cover to shed moisture. Allow for free air flow around covered material to exchange outside air.

Require all personnel to wear clean white cotton gloves when handling and installing panels and accessories when no strippable film is present.

Do not store panels in contact with other materials that might cause staining, denting, or other surface damage.

Store all panels and flashings so that they will not accumulate water.

1.

2.

1.

2.

3.

4.

B.

1.07 WARRANTY:

A. Upon final acceptance for project, metal panel manufacturer to furnish a warranty covering bare metal against rupture, structural failure, and perforation due to normal atmospheric corrosion exposure fora period of twenty years.

Provide warranty covering panel finish against cracking, checking, blistering, peeling, flaking, chipping, chalking, and fading for a period of twenty years.

April 2023 STANDING SEAM METAL ROOF PANELS 07410 - 2

PART TWO - PRODUCTS

2.01 METAL PANEL MANUFACTURERS:

A. Design based on Klip-lok 700 or approved equivalent.

2.02 PRIMARY MATERIALS:

Steel Underlayment: Sisalation Reflective Foil Underlayment by Fletcher Insulation. Or approved equivalent.

Roof Panels:

A.

B.

Panel Style: Klip-Lok 700 Fli-Strength

Panel Profile: Nominal 43 mm (2-inch) high standing seam by 700 mm (28-inch) width.

Steel Grade: G550

1.

2.

3.

4. Texture: Colorbond Metallic Steel

Color: Cream Pudding White5.

C. Fasteners:

1. Exposed fasteners shall be self-tapping stainless steel screws with steel backed neoprene washers and pre-finished heads, color to match panel.

Clip-to-Wood Substrate: Wood screw suitable for penetrating through substrate minimum 19 mm (3/4-inch), as approved by manufacturer.

2.

D. Accessories:

Accessories (e.g. ventilators, skylights, gutter, fascia) shall be as standard with the system manufacturer.

Material used in flashing and transition parts and furnished as standard by manufacturer may or may not match the roof panel material. Parts shall by compatible and shall not cause a corrosive condition. Do not use copper and/or lead materials with coated panels.

Perpendicular and Parallel Wall Flashings: Fabricate flashing from material matching existing.

Tape Sealants: 25 mm (1-inch) wide pressure sensitive, 100 percent solid, butyl sealing tape with a release paper backing.

Required Performances: Fabricate panels and other components of roof system for the following installed-as-indicated performances:

Roof Loading: 1,916 N/m^ (40 pounds per square foot) inward; 719 N/m^ (15 pounds per square foot) outward.

Water Penetration: No significant, uncontrolled leakage at 192 N/m2(4 pounds per square foot) pressure with spray test.

Air Infiltration: 0.02 cfm per square foot for gross roof areas, with 192 N/m^ (4 pounds per square foot) differential pressure.

1.

2.

3.

4.

1.

2.

3.

E.

2.03 FABRICATION:

A. Roll form panels in continuous lengths, full length of detailed runs from ridge to eave.

Provide continuous maximum panel length to suit project conditions to eliminate minimize panel end lap splices.

Fabricate trim, flashing, and accessories to detailed profiles.

Fabricate trim and flashing from same material as roof panel.

or B.

C.

D.

April 2023 STANDING SEAM METAL ROOF PANELS 07410 - 3

PART THREE - EXECUTION

3.01 GENERAL:

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

Follow all applicable regulations, safety standards, and codes. When a conflict exists, the more restrictive document shall govern.

Comply with roof panel fabricator's and material manufacturer's instructions and recommendations for installation as applicable to project conditions and supporting substrates. Anchor panels and other components of the work securely in place, with provisions for thermal/structural movement.

Fabricate sheet metal roofing panels to allow for expansion in running work sufficient to prevent leakage, damage, and deterioration of the Work. Form exposed sheet metal work to fit substrates without excessive oil canning, buckling, and tool marks, true to line and levels indicated, and with exposed edges folded back to form hems.

Form and fabricate sheets, seams, strips, cleats, edge treatments, integral flashing, and other components of metal roofing to profiles, patterns, and drainage arrangements shown and as required to resist Water Infiltration without excessive use of sealants (dry joints) while also allowing any water infiltration behind the roof panels to weep out.

Install work to be truly straight and square or conform to curvilinear geometry indicated on drawings.

1.

B.

C.

D.

E.

1. Fabricate and install work with lines and corners of exposed units true and accurate.

2. Form exposed faces free of buckles, excessive waves, and avoidable tool marks considering temper and reflectivity of metal.

Shim and align panel units within installed tolerance of 6 mm (1/4-inch) in 6 m (20 feet).

All seams shall be of uniform appearance and dimensions, straight andlevel with minimum exposure of solder and sealant.

Except as otherwise shown, fold back sheet metal to form a hem on concealed side of exposed edges.

Form all seams to be weatherproof, leaving room for expansion and contraction with specified and required tolerances.

Comply with manufacturer's installation instructions and SMACNAArchitectural Sheet Metal Manual for flashings and sheet metal work.

Conceal fasteners and expansion provision where possible in exposed work, and locate so as to minimize possibility of leakage. Cover and seal fasteners and anchors as required for a tight installation.

To avoid material tearing, provide cuts with rounded notching tool or cut to pre-drilled hole. Only use smooth edge (non-serrated) shears and snips for cutting.

Provide indirect attachment of exposed with concealed "keeper" whenever possible.

Avoid exposed and direct fastening especially at lap locations to allow movement.

3.

4.

5.

6.

7.

F.

G.

H.

April 2023 STANDING SEAM METAL ROOF PANELS 07410 - 4

3.02 INSTALLATION:

A. Reflective Roof Underlayment: Lay foil facing perpendicular to the roof slope and lap edges 150mm, fasten with top edge underneath laps.

B. Roof Panels:

1. Clip Installation:

Secure clip into deck substrate using appropriate fastener; two perclip.

Space clips in accordance with manufacturer's requirements to achieve specified wind uplift resistance.

Panel Installation:

a.

b.

2.

Attach panels to clips and install panels so they are weathertight, without waves, warps, buckles, fastening stresses, or distortion. Allow for expansion and contraction of materials.

Install panels plumb, in plane, and straight with joints parallel to one another and the building line. Panel plane shall be true to 6 mm (1/4-inch) in 6 m (20 feet), shim substrate surface as required.

Mechanically secure panels at designated anchorage points as required by manufacturer.

Apply continuous double-bead of sealant between panel laps.

a.

b.

c.

d.

3. Flashings:

Provide pre-fabricated sheet metal flashings and components at ridges, eaves, rake edges, head/side walls, and roof curbs.

Secure flashings to panels utilizing concealed clips, Z-closures, and grommetted screw fasteners.

Install Z-closures in continuous bead of sealant or tape sealant and secure in place. Apply sealant between closure and standing seam and tool to provide seal.

Install flashings in accordance with manufacturer's requirements to provide the weathertightness warranty.

Install sheet metal base flashings at round penetrations in field of panel.

Secure flange of metal base to panel with pop rivets spaced 25 mm (1-inch) on-center. Fully solder sheet metal base to metal roof panels.

Apply sealant along top edge of base. Install sheet metal bonnet to penetrating element to conceal top edge of sheet metal base.

a.

b.

c.

d.

e.

3.03 INSTALLATION TOLERANCE:

Shim and align units within installed tolerance of 6 mm (1/4-inch) in 6 m (20 feet) on level/plumb/slope and location/line, and within 3 mm (1/8-inch) offset of adjoining faces and of alignment of matching profiles.

A.

3.04 JOINT SEALERS:

A. Install gaskets, joint fillers, and sealants where required for weatherproof performance of panel systems. Provide types of gaskets and sealants/fillers recommended by manufacturer.

April 2023 STANDING SEAM METAL ROOF PANELS 07410 - 5

EXPANSION/CONTRACTION:

Roof shall provide thermal expansion/contraction without detrimental effect on the roof panel when there is a +/- 100-degree temperature difference between the inside structural framework of the building and the temperature of the roof panels, thus allowing a full 62.5 mm (2-1/2-inches) of roof movement.

All end wall trim and roof transition flashing shall allow the roof panel to move relative to the wall panels as the roof expands and contracts with temperature change.

A.

B.

3.05

3.06 CLEANING AND PROTECTION:

Remove temporary protective coverings and strippable films (if any) as each panel is installed. Upon completion of panel installation, clean finish surfaces as recommended by manufacturer. Maintain in a clean condition throughout construction.

Touch up minor scratches and abrasions.

Replace all damaged panels and other components of the work which have been damaged or have deteriorated beyond successful repair by means of finish, touch up, or similar minor repair procedures.

A.

B.

C.

END OF SECTION 07410

I I

I •

April 2023 STANDING SEAM METAL ROOF PANELS 07410 - 6

SECTION 07620: SHEET METAL FLASHING AND TRIM

PART ONE - GENERAL

1.01 SECTION INCLUDES:

Shop or field-formed sheet metal work for moisture protection.

Types of work specified in this Section include:

Counterflashings.

Drip edge/eave flashing.

Flashing aprons.

Gutters and downspouts.

Miscellaneous sheet metal accessories.

Sealants and Caulking

A.

B.

1.

2.

3.

4.

5.

C.

1.02 REFERENCES:

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

National Roofing Contractor's Association (NRCA): NRCA Roofing and Waterproofing Manual.

Sheet Metal and Air Conditioning Contractor's National Association, Inc. (SMACNA):

Architectural Sheet Metal Manual.

B.

C.

1.03 WARRANTY:

A. Contractor's Warranty: Provide Embassy a written warranty which shall warrant sheet metal work to be free of leaks and defects in materials and workmanship for five years after date of final acceptance.

PART TWO - PRODUCTS

2.01 SHEET METAL MATERIAL:

A. Pre-painted, Metallic-Coated Steel Sheet: Galvanized sheet steel (G90); pre-painted by coil coating process, ASTM A 755; provide with manufacturer's strippable plasticfil High-Performance Organic Finish: Two-coat thermocured system containing not less than 70 percent polyvinylidene fluoride (Kynar/Hylar) resin by weight; complying with AAMA 2604. Color as selected by Owner from standard colors.

m.

B.

2.02 FASTENERS:

Fasteners shall be same metal as flashing and sheet metal being joined.

Exposed fasteners shall be self-sealing or gasketed for watertight installation.

Heads of fasteners, including but not limited to, rivets, screws, and bolts, that are exposed or visible shall have same manufactured finishes as item being secured; color tomatch.

Mechanical Fasteners:

A.

B.

C.

D.

1. Washers: Steel washers with bonded rubber sealing gasket.

Screws: Self-tapping sheet metal type compatible with material fastened.2.

April 2023 SHEET METAL FLASHING AND TRIM 07620 - 1 i 1 1 i iI 1 i I 12 13 145 6 7 8 9 10 111 2 3 4

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The Contractor shall, within 30 days after award, prepare and submit to the Contracting Officer for approval a practicable schedule showing the order in which the Contractor proposes to perform the work, and the dates on which the

Contractor contemplates starting and completing the several salient features of the work (including acquiring materials, plant, and equipment). The schedule shall be in the form of a progress chart of suitable scale to indicate appropriately the percentage of work scheduled for completion by any given date during the period, if the Contractor fails to submit a schedule within the time prescribed, the Contracting Officer may withhold approval of progress payments until the Contractor submits the required schedule.

The Contractor shall prepare a monthly progress report, along with the monthly invoice, summing up observations resulting from the inspections, progress, difficulties or irregularities encountered, resolution of problems, measures taken to improve conditions, recommendations, and other matters related to this contract. The monthly progress reports shall include an annotated schedule showing actual progress of the work.

If, in the opinion of the Contracting Officer, the Contractor falls behind the approved schedule, the Contractor shall take steps necessary to improve its progress, including those that may be required by the Contracting Officer, without additional cost to the Government. In this circumstance, the Contracting

Officer may require the Contractor to increase the number of shifts, overtime operations, days of work, and/or the amount of construction plant, and to subnr it for approval any supplementary schedule or schedules in chart form as the Contracting Officer deems necessary to demonstrate how the approved rate of progress will be regained.

Failure of the Contractor to comply with the requirements of the Contracting

Officer under this clause shall be grounds for a determination by the Contracting

Officer that the Contractor is not prosecuting the work with sufficient diligence to ensure completion within the time specified in the contract. Upon making this determination, the Contracting Officer may terminate the Contractor's right to proceed with the work, or any separable part of it, in accordance with the default terms of this contract, or impose liquidated damages for any additional costs actually incurred by the Government as a result of the Contractor's failure to meet the schedule.

A.

B.

C.

D.

7. SUSPENSION OF WORK

The Contracting Officer may order the Contractor, in writing, to suspend, delay, or interrupt all or any part of the work of this contract for the period of time that the Contracting Officer determines appropriate for the convenience of the Government.

If the performance of all or any part of the work is, for an unreasonable period of time, suspended, delayed, or interrupted (1) by an act of the Contracting Officer in the administration of this contract, or (2) by the Contracting Officer's

A.

Page 5ROOF REPLACEMENTJuly 2023 failure to act within the time specified in this contract (or within a reasonable time if not specified), an adjustment shall be made for any increase in the cost of performance of this contract (excluding profit) necessarily caused by the unreasonable suspension, delay, or interruption, and the contract modified in writing accordingly. However, no adjustment shall be made under this clause for any suspension, delay, or interruption to the extent that performance would have been so suspended, delayed, or interrupted by any other cause, including the fault or negligence of the Contractor, or for which an equitable adjustment is provided for or excluded under any other term or condition of this contract.

A claim under this clause shall not be allowed -

For any costs incurred more than 20 days before the Contractor shall have notified the Contracting Officer in writing of the act or failure to act involved (but this requirement shall not apply as to a claim resulting from a suspension order); and Unless the claim, in an amount stated, is asserted in writing as soon as practicable after the termination of the suspension, delay, or interruption, but not later than the date of final payment under the contract.

1.

2.

C.

8. WORKING HOURS AND HOLIDAYS

The Contractor's personnel must be accompanied by U.S. Embassy escorts at all times on the job site. No work is allowed without escorts on duty.

Access will be available from 08:00 hours until 17:00 (Monday through

Thursday) and from hours and from 08:00 hours until 12:00 (Fridays) during regular workdays, unless mutually agreed in advance.

The daily working schedule can be adjusted, if mutually agreed between the COR and Contractor including overtime on Fridays, Saturday, Sunday, and Holidays.

U.S. Embassy Escorts will have lunch from 12:00 until 13:00 hours.

Contractor personnel are not expected to work on a holiday. Observance of such days shall not be cause for additional period of performance or entitlement to compensation. If the Contractor's personnel work on a holiday, no form of holiday or other premium compensation will be reimbursed either as a direct or indirect cost.

The Contractor must notify the COR and U.S. Embassy Supervisor at least 48 working hours in advance to schedule overtime work or special work hours.

OBSERVANCE OF LEGAL HOLIDAYS: The U.S. Embassy in Malawi observes the following holidays:

A.

B.

C.

D.

E.

F.

U.S. / MalawianNew Year's Day

U.S. / MalawianMartin Luther King Jr. Day/ Chilembwe Day

Presidents' Day U.S.

MalawianMartyrs' Day

Page 6ROOF REPLACEMENTJuly 2023

MalawianGood Friday

MalawianEaster Monday MalawianLabour Day

MalawianEid al-Fitr(TBD) MalawianKamuzu Day

Memorial Day U.S.

Juneteenth U.S.

Independence Day U.S.

MalawianIndependence Day

Labor Day U.S.

Columbus Day U.S.

MalawianMother's Day U.S.Veterans Day

Thanksgiving Day U.S.

U.S. / MalawianChristmas Day

MalawianBoxing Day

Plus any other day designated by Federal law, Executive Order or

Presidential Proclamation.

The actual date of observance for some holidays may vary if the holiday falls on a weekend.

1.

2.

9. SUPERVISION, QUALITY ASSURANCE, AND INSPECTION

SUPERINTENDENCE BY THE CONTRACTOR: At all times during performance of this contract and until the work is completed and accepted, the

Contractor shall directly superintend the work or assign and have on the worksite a competent superintendent who is satisfactory to the Contracting Officer and has authority to act for the Contractor. (FAR

52.236-6)

The Contractor shall be qualified or approved by the manufacturer to perform the work for the specified guarantee period. The Contractor shall be responsible for the Roof Manufacturer's Warranty and Inspection.

The Contractor shall institute an appropriate inspection system set forth in a Quality Assurance Plan.