INVITATION FOR BIDS

BID PROPOSAL AND CONTRACT DOCUMENTS

HEALTH DEPARTMENT

MODIFIED BITUMINOUS MEMBRANE

ROOFING SYSTEM REPLACEMENT

BID# D00226

APRIL 16, 2026

PUBLIC WORKS BUILDING MAINTENANCE

Bid # D00226 Health Department Bituminous Roof Replacement

Table of Contents

INVITATION TO BID

PURPOSE

INQUIRIES CONCERNING THE BID

BID SCHEDULE

BID SUBMISSION FORMATS

CITY OF STAUNTON GENERAL IFB SUBMISSION REQUIREMENTS

NOTICE OF AWARD

SPECIFICATIONS

BID OFFER FORM

BIDDER INFORMATION FORM

PROCUREMENT GUIDELINES

ESCROW AGREEMENT SIGNATURE FORM

Bid # D00226 Health Department Bituminous Roof Replacement

INVITATION TO BID

BID TITLE:

Health Department Modified Bituminous Membrane Roofing System

Replacement

BID #: D00226

BID OPENING DATE: May 12, 2026 at 2:00 p.m.

MANDATORY PRE-BID MEETING:

Yes, April 28, 2026 at 9:00 a.m. at the

Staunton-Augusta Health Department

BONDS NEEDED: BID BOND NO

PAYMENT BOND NO

PERFORMANCE BOND NO

PURPOSE

The City of Staunton is seeking written bids from qualified Class A contractors to remove and replace the existing spray foam roof system at the Staunton City Health Department, in accordance with the attached specifications.

Contractors will provide all materials, equipment, labor and supervision to remove the existing spray foam roof system and apply a new Modified Bituminous Membrane Roofing System in accordance with the attached specifications. Contractors will also remove any existing roof system from two (2) small canopies with flat roofs and replace the canopy roof systems with the same materials as the large roof.

INQUIRIES CONCERNING THE BID

There will be a Mandator Pre-Bid Meeting held at the Staunton-Augusta Health Department at

1414 N. Augusta Street, Staunton, VA 24401 on April 28, 2026 at 9:00 a.m.

Any questions regarding the specifications for this bid should be directed, in writing, to:

Lloyd Otte

Building Maintenance Superintendent ottelv@ci.staunton.va.us

Written inquiries on the bid are due by no later than 5:00 p.m. April 29, 2026.

BID SCHEDULE

Bid Posted: April 16, 2026

Mandatory Pre-Bid Meeting April 28, 2026 at 9:00 A.M. at the Staunton Health Department

Questions Due: April 29, 2026, 5:00 p.m.

Q&A Addenda Posted: May 1, 2026 by 5:00 p.m.

Bids Due & Bid Opening: May 12, 2026 at 2:00 p.m.

Bid # D00226 Health Department Bituminous Roof Replacement

BID SUBMISSION FORMATS

This Bid is a request for a sealed bid; therefore, bids may be submitted electronically through the eVA system, or they may be submitted by non-electronic means (paper submissions) outside of the eVA system.

The Purchasing Office will NOT accept oral bids or bids received by E-mail, telephone, or fax.

Sealed bids, whether electronic or paper, will be received not later than 2:00 p.m. on MAY 12, 2026 with bids received by that time publicly opened at 2:00 p.m. at Staunton City Hall, Finance

Department.

1. Paper Submissions

A. All paper bids submitted by any delivery services (UPS, FedEx, etc.), US Postal Service, or hand-delivered shall be timely delivered to:

ATTN: Chad M. Horvat

City of Staunton

Finance Office (3rd Floor)

116 W. Beverley Street

3rd Floor - Finance Department

Staunton, VA 24401

540-332-3819

BIDS RECEIVED

AFTER THE DATE AND TIME SPECIFIED

WILL BE REJECTED

Office Hours

Monday through Friday, 8:00am to 5:00pm.

B. Bidders shall provide one (1) paper copy of the bid.

C. The bid, the bid security, if any, and any other required documents, shall be enclosed in a sealed opaque envelope or box. The envelope containing the bid shall be sealed and marked with the title and due date of the bid. “Bid No. D00226 –HEALTH DEPARTMENT MODIFIED

BITUMINOUS MEMBRANE ROOFING SYSTEM REPLACEMENT” and be accompanied by complete specifications for the items offered.

D. Bids should also clearly indicate the legal name, address and telephone number of the Bidder

(company, firm, partnership, or individual) on the outside of the packaging.

E. No responsibility will attach to the City or any official or employee thereof for the pre-opening of, post-opening of, or the failure to open a bid not properly addressed and identified.

F. Official received time for bids shall be determined by the time stamp affixed in the City of

Staunton Finance Department at the time of receipt. Bidders are responsible for ensuring that their bids are stamped by Finance Department personnel by the deadline indicated.

G. All expenses for bidding to the City of Staunton shall be borne by the Bidder.

Bid # D00226 Health Department Bituminous Roof Replacement

H. An authorized representative of the bidder shall sign the Bid Offer Form and the Bidder

Information Form as well as any other required attachments.

I. All bids shall be either typewritten or filled in with ink in order to be considered.

2. Electronic Submissions via the eVA System

A. Electronic sealed bids will be accepted ONLY through the eVA system. Bids delivered electronically by any method outside of the eVA system WILL NOT be accepted.

B. Prior to the due date, Bidders should:

i. Check the status of the solicitation on eVA at www.eva.virginia.gov by clicking on

Business Opportunities and then click on Virginia Business Opportunities (VBO) to check for any updates, changes, amendments, cancellations, etc., and to ensure receipt of all Solicitation attachments and document to be completed and submitted; and.;

ii. Complete all attachments, amendments, exhibits, product information, etc. and attach electronically to the Bidder’s electronic submission.

C. Electronic bid submission with all required documents attached is required and submission as one singular PDF formatted document is preferred.

D. Bidders must submit one (1) complete copy of the bid and all required documents and/or attachments.

eVA Specific Submission Instructions:

Bidders must be registered in eVA in order to submit an electronic bid.

The following are instructions for submitting an electronic bid:

1) Go to www.eva.virginia.gov;

2) Click on “I Sell To Virginia”;

3) Click on “eVA Supplier Training”; and

4) Click on “Viewing and Responding to Solicitations Video”.

5) If a Bidder needs assistance submitting an electronic response, the

Bidder must contact eVA Customer Care at 866-289-7367 or email eVACustomerCare@dgs.virginia.gov.

CITY OF STAUNTON GENERAL IFB SUBMISSION REQUIREMENTS

1. Right is reserved to accept or reject bids on each item separately or as a whole, to reject any or all bids, to waive informalities or irregularities, to negotiate contract terms and options with the successful low bidder, and to contract for the bid to other than the lowest bidder in the best interest of the City of Staunton to the extent allowable by law.

2. Offerors are solely responsible for reviewing, complying, and returning a complete and responsive bid. Changes to the solicitation’s forms or formats are prohibited except where clearly instructed and permitted.

http://www.eva.virginia.gov/ http://www.eva.virginia.gov/ mailto:eVACustomerCare@dgs.virginia.gov

Bid # D00226 Health Department Bituminous Roof Replacement

3. Prior to the due date, Bidders should:

a. Check the status of the solicitation for any updates, changes, amendments, cancellations, etc. which can be found at either the City of Staunton’s website www.ci.staunton.va.us on the Procurement page or at the eVA website www.eva.virginia.gov on the Business

Opportunities page (VBO)

b. Check for all attachments and documents to be completed and submitted; and

c. Complete all attachments, amendments, exhibits, product information, etc. and attach to the Bidder’s submission.

4. The Bid Offer Form and Bidder Information Form must accompany any bid(s) submitted and be signed by an authorized representative of the Bidder.

a. If the Bidder is a firm or corporation, the Bidder must print the name and title of the individual executing the bid.

b. All information requested should be submitted. Failure to submit all information may result in bid being considered non-responsive.

c. Bidders must use the Bid Offer Form and Bidder Information Form furnished by the City.

Failure to do so may cause bid to be rejected. Removal of any part of the Bid Offer Form and Bidder Information Form may invalidate the bid.

5. The contractor must have a minimum experience of three (3) projects with agencies of similar size and complexity that have been completed within the last two (2) years.

6. Written warranties covering equipment, material defects, appearance, workmanship and performance must be of industry standards but not less than one (1) year and will not commence until the City has given the successful bidder written acceptance of the completed project.

7. Please quote lowest price and best delivery on items listed.

8. Please advise what discount, if any, will be allowed for payment within a specified time.

9. Terms and delivery date must be specified.

10. All erasures, interpolations, and other changes in the bid shall be signed or initialed by the Bidder.

11. By submitting a bid in response to this Invitation to Bid, the Bidder represents it has read and understands the Invitation to Bid and has familiarized itself with all federal, state, and local laws, ordinances, and rules and regulations that in any manner may affect the cost, progress, or performance of the contract.

12. The failure or omission of any Bidder to receive or examine any form, instrument, addendum, or other documents, or to acquaint itself with existing conditions, shall in no way relieve any Bidder from any obligations with respect to its bid or to the contract.

13. A bid may be modified or withdrawn by the Bidder any time prior to the time and date set for the receipt of bids. The Bidder shall notify the Purchasing Office in writing of modifications or withdrawal.

14. Modified and withdrawn bids may be resubmitted to the Purchasing Office up to the original time and date set for the receipt of bids.

http://www.ci.staunton.va.us/ http://www.eva.virginia.gov/

Bid # D00226 Health Department Bituminous Roof Replacement

15. No bid can be withdrawn after the time set for the receipt of bids and for ninety (90) days thereafter.

16. All bids received in the Purchasing Office on time shall be accepted. All late bids received by the

Purchasing Office shall be retained by the Purchasing Department and will remain unopened. Bids shall be open to public inspection only after award of the contract.

NOTICE OF AWARD

Award will be made once all bids are reviewed and the lowest responsible and responsive bidder is identified, and all the processes to complete an agreement are finalized. Notice of award will be posted at https://www.ci.staunton.va.us/departments/finance/procurement and on the eVA procurement site.

HEALTH DEPARTMENT MODIFIED BITUMINOUS MEMBRANE

ROOFING SYSTEM REPLACEMENT

SPECIFICATIONS

SECTION 07 52 00

PART 1 GENERAL

1.1 SUMMARY OF WORK

A. Roof Replacement Scope of Work

1. Removal of the existing spray foam roof system to the concrete deck including all insulation, flashings and terminations, metal coping, and edge metal.

2. Installation of new tapered insulation in insulation adhesive.

3. Installation of new high density cover board in insulation adhesive.

4. Installation of new torch applied two ply roof system with mineral cap sheet.

5. Installation of new torch applied two ply flashings and terminations.

6. Installation of new shop fabricated coping caps and edge metal.

1.2 SECTION INCLUDES

A. Torch Applied 2-Ply Asphalt Roofing

B. Roof Insulation

C. Accessories.

D. Edge Treatment and Roof Penetration Flashings.

1.3 REFERENCES

A. ASTM D 41 - Standard Specification for Asphalt Primer Used in Roofing, Damp proofing, and Waterproofing.

https://www.ci.staunton.va.us/departments/finance/procurement

Bid # D00226 Health Department Bituminous Roof Replacement

B. ASTM D 312 - Standard Specification for Asphalt used in Roofing.

C. ASTM D 412 - Tensile Test on Rubber and Elastomers.

D. ASTM D 1863 Standard Specification for Mineral Aggregate Used as a Protective Coating for Roofing.

E. ASTM D 2178 Standard Specification for Asphalt Glass Felt Used in Roofing and

Waterproofing.

F. ASTM D 4586 Standard Specification for Asphalt Roof Cement, Asbestos-Free.

G. ASTM D 5147 Standard Test Method for Sampling and Testing Modified Bituminous Sheet

Materials.

H. ASTM D 6162 Standard Specification for Styrene Butadiene Styrene (SBS) Modified

Bituminous Sheet Materials Using a Combination of Polyester and Glass Fiber

Reinforcements.

I. ASTM E 108 - Standard Test Methods for Fire Test of Roof Coverings

J. Factory Mutual Research (FM): Roof Assembly Classifications.

K. National Roofing Contractors Association (NRCA): Roofing and Waterproofing Manual.

L. Sheet Metal and Air Conditioning Contractors National Association, Inc. (SMACNA) -

Architectural Sheet Metal Manual.

M. ANSI-SPRI ES-1 Wind Design Standard for Edge Systems used with Low Slope Roofing

Systems.

N. ASCE 7, Minimum Design Loads for Buildings and Other Structures

O. UL - Fire Resistance Directory.

P. FM Approvals - Roof Coverings and/or RoofNav assembly database.

1.4 DESIGN / PERFORMANCE REQUIREMENTS

A. Perform work in accordance with all federal, state and local codes.

B. Design Requirements:

1. Uniform Wind Uplift Load Capacity

a. Installed roof system shall withstand negative (uplift) design wind loading pressures complying with the following criteria.

1) Design Code: ASCE 7, Method 2 for Components and Cladding.

2) Importance Category:

a) IV

3) Importance Factor of:

a) 1.0

4) Wind Speed: 122 mph

5) Exposure Category:

Bid # D00226 Health Department Bituminous Roof Replacement

a) C.

6) Design Roof Height: 20 feet.

7) Minimum Building Width: 115 feet.

8) Roof Pitch: ¼” :12”.

9) Roof Area Design Uplift Pressure:

a) Zone 1' Interior Field of Roof 25.4 psf

b) Zone 1 - Field of roof 39.5 psf

c) Zone 2 - Eaves, ridges, hips and rakes 50 psf

d) Zone 3 - Corners 65.8 psf

2. Live Load: Not to exceed original building design.

3. Dead Load:

a. Installation of new roofing materials shall not exceed the dead load capacity of the existing roof structure.

1.5 SUBMITTALS

A. To be provided to the owner for approval prior to commencing roof work.

B. Product Data: Manufacturer's data sheets on each product to be used, including:

1. Preparation instructions and recommendations.

2. Storage and handling requirements and recommendations.

3. Installation instructions.

C. Shop Drawings: Submit shop drawings including installation details of roofing, flashing, fastening, insulation and vapor retarder, including notation of roof slopes and fastening patterns of insulation and base modified bitumen membrane, prior to job start.

D. Design Pressure Calculations: Submit design pressure calculations for the roof area in accordance with ASCE 7 and local Building Code requirements. Include a roof system attachment analysis report, certifying the system's compliance with applicable wind load requirements before Work begins.

E. Verification Samples: For each modified bituminous membrane ply product specified, two samples, minimum size 6 inches (150 mm) square, representing actual product, color, and patterns.

F. Manufacturer's Fire Compliance Certificate: Certify that the roof system furnished is approved by Factory Mutual (FM), Underwriters Laboratories (UL), Warnock Hersey (WH) or approved third party testing facility in accordance with ASTM E108, Class A for external fire and meets local or nationally recognized building codes.

G. Closeout Submittals: Provide manufacturer's maintenance instructions that include recommendations for periodic inspection and maintenance of all completed roofing work.

Provide product warranty executed by the manufacturer. Assist Owner in preparation and

Bid # D00226 Health Department Bituminous Roof Replacement submittal of roof installation acceptance certification as may be necessary in connection with fire and extended coverage insurance on roofing and associated work.

1.6 QUALITY ASSURANCE

A. Perform Work in accordance with NRCA Roofing and Waterproofing Manual.

B. Manufacturer Qualifications: Company specializing in manufacturing products specified with documented ISO 9001 certification and minimum of twelve years of documented experience and must not have been in Chapter 11 bankruptcy during the last five years.

C. Installer Qualifications: Company specializing in performing Work of this section with minimum five years documented experience and a certified Pre-Approved contractor by the manufacturer.

D. For torch applications, installer must be NRCA - CERTA trained and must utilize CERTA compliant application methods.

E. Installer's Field Supervision: Maintain a full-time Supervisor/Foreman on job site during all phases of roofing work while roofing work is in progress.

F. Manufacturer's Field Supervision: A representative of the roof system manufacturer must be present during the roof system installation per Section 1.7 of this specification.

G. Product Certification: Provide manufacturer's certification that materials are manufactured in the United States and conform to requirements specified herein, are chemically and physically compatible with each other, and are suitable for inclusion within the total roof system specified herein.

H. Source Limitations: Obtain all components of roof system from a single manufacturer.

Secondary products that are required shall be recommended and approved in writing by the roofing system Manufacturer. Upon request of the Owner, submit Manufacturer's written approval of secondary components in list form, signed by an authorized agent of the

Manufacturer.

1.7 MANUFACTURER’S INSPECTIONS

A. The roof system manufacturer must provide the following during all phases of the roofing work.

1. Onsite inspections daily during the first 7 days of work.

2. Onsite inspections 3 days per week for the remainder of the work.

3. Inspections must be provided by a full-time employee who is employed directly by the manufacturer.

4. Manufacturer to provide weekly progress reports to the owner with photographs of the work completed, weekly weather, and any corrections made during the work.

5. Provide a manufacturer’s Certification letter, stating that the roof system manufacturer will provide the inspection services as required by this specification. This letter must be signed and notarized by an officer of the manufacturing company.

1.8 PRE-INSTALLATION MEETINGS

A. Convene minimum two weeks prior to commencing roof work.

Bid # D00226 Health Department Bituminous Roof Replacement

B. Review installation procedures and coordination required with related Work.

C. Inspect and make notes of job conditions prior to installation:

1. Record minutes of the conference and provide copies to all parties present.

2. Identify all outstanding issues in writing designating the responsible party for follow-up action and the timetable for completion.

3. Installation of roofing system shall not begin until all outstanding issues are resolved to the satisfaction of the Owner.

1.9 DELIVERY, STORAGE, AND HANDLING

A. Deliver and store products in manufacturer's unopened packaging with labels intact until ready for installation.

B. Store all roofing materials in a dry place, on pallets or raised platforms, out of direct exposure to the elements until time of application. Store materials at least 4 inches above ground level and covered with "breathable" tarpaulins.

C. Stored in accordance with the instructions of the manufacturer prior to their application or installation. Store roll goods on end on a clean flat surface except store KEE-Stone HP and

FB 60 rolls flat on a clean flat surface. No wet or damaged materials will be used in the application.

D. Store at room temperature wherever possible, until immediately prior to installing the roll.

During winter, store materials in a heated location with a 50-degree F (10 degree C) minimum temperature, removed only as needed for immediate use. Keep materials away from open flame or welding sparks.

E. Avoid stockpiling of materials on roofs without first obtaining acceptance from the Owner.

F. Adhesive storage shall be between the range of above 50-degree F (10 degree C) and below

80-degree F (27 degree C). Area of storage shall be constructed for flammable storage.

1.10 COORDINATION

A. Coordinate Work with installing associated metal flashings as work of this section proceeds.

1.11 PROJECT CONDITIONS

A. Maintain environmental conditions (temperature, humidity, and ventilation) within limits recommended by manufacturer for optimum results. Do not install products under environmental conditions outside manufacturer's absolute limits.

1.12 WARRANTY

A. Upon completion of the Work, provide the Manufacturer's written and signed Warranty, warranting that, if a leak develops in the roof during the term of this warranty, due to defective material or workmanship, the manufacturer shall provide the Owner, at the Manufacturer's expense, with the labor and material necessary to return the defective area to a watertight condition.

1. Warranty Period: 30 years from date of acceptance.

Bid # D00226 Health Department Bituminous Roof Replacement

B. Installer is to guarantee all work against defects in materials and workmanship for a period indicated following final acceptance of the Work.

1. Warranty Period:

a. Three (3) years from date of acceptance.

PART 2 PRODUCTS

2.1 ACCEPTABLE MANUFACTURERS

A. When a particular trade name or performance standard is specified, it shall be indicative of the minimum standard required. Product names for the materials used in this section shall be based on performance characteristics of the modified bitumen roof system manufactured by

The Garland Company, Cleveland, OH (434-953-0531), and shall form the basis of the contract documents.

B. This specification is based on the performance characteristics of the system identified herein.

Any proposed alternate systems, specified or not, must meet or exceed the following listed characteristics and be submitted for approval. Additionally, all Warranty Criteria (1.12), Design and Performance Criteria (1.4), and Manufacturer’s Inspections (1.7) must be met.

Failure of a system to meet all requirements of this specification will result in forfeiture of the bid award.

C. Any item or materials submitted as a substitution to the basis of design manufacturer specified, must be submitted by the bidding Contractor and must comply in all respects as to the quality and performance of the brand name specified. The Owner shall be the sole judge as to whether or not an item submitted as a substitute is truly equal. Should the Contractor choose to submit a substitute product, he shall assume all monetary or other risk involved, should the Owner find the substitution unacceptable.

D. Provide primary products, including each type of roofing membrane, base roofing ply, base flashing ply, modified membrane flashing ply, modified membrane roof ply, and miscellaneous flashing materials from a single source roof manufacturer. Provide secondary products (insulation, mechanical fasteners, etc.) only as recommended by the roof manufacturer of primary products for use with the roof system specified.

E. The following manufacturers are acceptable, providing they meet these specifications and the minimum standards stated.

1. The Garland Company, Inc. (Basis of Design)

2. Approved Equal

2.2 SHEET MATERIALS

A. Base (Ply) Sheet: One ply bonded to the prepared substrate torch applied.

1. HPR Torch Base

2. OR approved equal

B. Modified Cap (Ply) Sheet: One ply bonded to the prepared substrate torch applied.

1. StressPly IV Plus Mineral:

2. Or approved equal

Bid # D00226 Health Department Bituminous Roof Replacement

C. Interply Adhesive:

1. NA

D. Intumescent primer for wood components at perimeters, flashings and penetrations:

1. Pro-Stop FR:

2. Or approved equal

E. Flashing Base Ply: One ply bonded to the prepared substrate torch applied.

1. HPR Torch Base:

2. Or approved equal.

F. Flashing Cap (Ply) Sheet: One ply bonded to the prepared substrate torch applied.

1. StressPly IV Plus Mineral:

2. Or approved equal.

2.3 ROOF INSULATION

A. Roof Insulation

1. Qualities: Rigid closed cell polyisocyanurate foam core bonded to heavy duty glass fiber mat facers.

2. Board Size: Four feet by four feet (4’ x 4’) or Four feet by eight feet (4’ x 8’).

3. Thickness: R30 Average ¼” : 12 Tapered System

4. Strength: Minimum 20 psi

5. Source of Supply: The Garland Company or Approved Equal.

B. Cover Boards

1. Qualities: Nonstructural, water resistant, fiber-reinforced gypsum roof board.

2. Board Size: Four feet by four feet (4’ x 4’).

3. Thickness: ½”

4. Strength: Minimum 900 psi

5. Source of Supply: Georgia Pacific Densdeck Prime

2.4 ACCESSORIES

A. Insulation Adhesive: Insul-Lock HR or approved equal.

1. Cold applied, highly elastomeric, high rise, fast setting, two-component with a one step application mechanism, VOC compliant, foamable insulation adhesive that contains no solvents and sets in minutes. Designed to adhere approved insulation to insulation and structural decks.

B. Nails and Fasteners: Non-ferrous metal or galvanized steel, except that hard copper nails shall be used with copper; aluminum or stainless-steel nails shall be used with aluminum; and stainless-steel nails shall be used with stainless steel, Fasteners shall be self-clinching type of penetrating type as recommended by the deck manufacturer. Fasten nails and fasteners flush-

Bid # D00226 Health Department Bituminous Roof Replacement driven through flat metal discs not less than 1 inch (25 mm) diameter. Omit metal discs when one-piece composite nails or fasteners with heads not less than 1 inch (25 mm) diameter are used.

C. Fibrous Cant Strips: Provide non-combustible perlite or glass fiber cant strips at all wall/curb detail treatments where angle changes are greater than 45 degrees. Cant may be set in approved cold adhesives, hot asphalt or mechanically attached with approved plates and fasteners.

D. Walkway Pads: As recommended and furnished by the membrane manufacturer set in approved adhesive to control foot traffic on roof top surface and provide a durable system compliant non-slip walkway.

2.5 EDGE TREATMENT AND ROOF PENETRATION FLASHINGS

A. Shop Fabricated Edge Metal: Snap-On Fascia Cover and Splice Plate.

1. Zinc-coated steel, ASTM A653, coating designation G-90, in thickness of 24-gauge, chemically treated, commercial or lock-forming quality

B. Edge Metal Finishes:

1. Exposed surfaces for coated panels:

a. Steel Finishes: fluorocarbon finish. Epoxy primer baked both sides, .2-.25 mils thickness as approved by finish coat manufacturer.

Weathering finish as referred by National Coil Coaters Association (NCCA).

Provided with the following properties.

1) Pencil Hardness: ASTM D3363, HB-H / NCCA II-2.

2) Bend: ASTM D-4145, O-T / NCCA II-19.

3) Cross-Hatch Adhesion: ASTM D3359, no loss of adhesion.

4) Gloss (60 deg. angle): ASTM D523, 25+/-5%

5) Reverse Bend: ASTM D2794, no cracking or loss of adhesion.

6) Nominal Thickness: ASTM D1005.

a) Primer: 0.2 mils.

b) Topcoat: 0.7 mils min.

c) Clear Coat 0.3 mils.

7) Color: Standard Colors. TBD by Owner.

C. Flashing Boot - Rubbertite Flashing Boot: Neoprene pipe boot for sealing single or multiple pipe penetrations adhered in approved adhesives as recommended and furnished by the membrane manufacturer.

D. Pitch pans, Rain Collar 24 gauge stainless or 20oz (567gram) copper. All joints should be welded/soldered watertight. See details for design.

Bid # D00226 Health Department Bituminous Roof Replacement

E. Drain Flashings should be 4lb (1.8kg) sheet lead formed and rolled.

F. Plumbing stacks should be 4lb (1.8kg) sheet lead formed and rolled.

G. Retrofit Drains: A factory fabricated fixture (RetroDrain with Aluminum Dome), installed to replace a drain on an existing roof. The fixture is installed from the roof surface and provides a watertight connection to the existing plumbing and roofing system. The fixture is designed so that it may be installed without removing the existing drain body and plumbing.

1. Acceptable Manufacturers: OMG Roofing Products; Hercules or approved equal.

H. Liquid Flashing - Tuff-Flash Plus LO or approved equal. An asphaltic-polyurethane, low odor, liquid flashing material designed for specialized details unable to be waterproofed with typical modified membrane flashings.

1. Tensile Strength, ASTM D 412: 650 psi.

2. Elongation, ASTM D 412: 325%

3. Density @77 deg. F 8.3 lb/gal typical.

I. Fabricated Flashings: Fabricated flashings and trim shall conform to the detail requirements of SMACNA "Architectural Sheet Metal Manual" and/or the CDA Copper Development

Association "Copper in Architecture - Handbook" as applicable.

J. Manufactured Roof Specialties: Shop fabricated copings, fascia, gravel stops, control joints, expansion joints, joint covers and related flashings and trim. Manufactured roof specialties shall conform to the detail requirements of SMACNA "Architectural Sheet Metal Manual" and/or the NRCA "Roofing and Waterproofing Manual" as applicable.

PART 3 EXECUTION

3.1 EXAMINATION

A. Do not begin installation until substrates have been properly prepared.

B. Inspect and approve the deck condition, slopes and fastener backing if applicable, parapet walls, expansion joints, roof drains, stack vents, vent outlets, nailers and surfaces and elements.

C. Verify that work penetrating the roof deck, or which may otherwise affect the roofing, has been properly completed.

D. If substrate preparation and other conditions are the responsibility of another installer, notify

Owner of unsatisfactory preparation before proceeding.

3.2 PREPARATION

A. General: Clean surfaces thoroughly prior to installation.

1. Prepare surfaces using the methods recommended by the manufacturer for achieving the best result for the substrate under the project conditions.

2. Fill substrate surface voids that are greater than 1/4 inch wide with an acceptable fill material.

3. Roof surface to receive roofing system shall be smooth, clean, free from loose gravel, dirt and debris, dry and structurally sound.

Bid # D00226 Health Department Bituminous Roof Replacement

4. Wherever necessary, all surfaces to receive roofing materials shall be power broom and vacuumed to remove debris and loose matter prior to starting work.

5. Do not apply roofing during inclement weather. Do not apply roofing membrane to damp, frozen, dirty, or dusty surfaces.

6. Fasteners and plates for fastening components mechanically to the substrate shall provide a minimum pull-out capacity of 300 lbs. (136 k) per fastener. Base or ply sheets attached with cap nails require a minimum pullout capacity of 40 lb. per nail.

B. Re-Roofing Applications:

1. Remove existing roof flashings from curbs and parapet walls down to the surface of the roof. Remove existing flashings at roof drains and roof penetrations.

2. Remove all wet, deteriorated, blistered or delaminated roofing membrane or insulation and fill in any low spots occurring as a result of removal work to create a smooth, even surface for application of new roof membranes.

3. Install new wood nailers as necessary to accommodate insulation/recovery board or new nailing patterns.

4. Existing roof surfaces shall be primed as necessary with asphalt primer meeting ASTM

D 41 and allowed to dry prior to installing the roofing system.

3.3 INSTALLATION - GENERAL

A. Install modified bitumen membranes and flashings in accordance with manufacturer's instructions and with the recommendations provided by the National Roofing Contractors

Association's Roofing & Waterproofing Manual, the Asphalt Roofing Manufacturers

Association, and applicable codes.

B. General: Avoid installation of modified bitumen membranes at temperatures lower than 40-

45 degrees F. When work at such temperatures unavoidable use the following precautions:

1. Take extra care during cold weather installation and when ambient temperatures are affected by wind or humidity, to ensure adequate bonding is achieved between the surfaces to be joined. Use extra care at material seam welds and where adhesion of the applied product to the appropriately prepared substrate as the substrate can be affected by such temperature constraints as well.

2. Unrolling of cold materials, under low ambient conditions must be avoided to prevent the likelihood of unnecessary stress cracking. Rolls must be at least 40 degrees F at the time of application. If the membrane roll becomes stiff or difficult to install, it must be replaced with roll from a heated storage area.

C. Commence installation of the roofing system at the lowest point of the roof (or roof area), working up the slope toward the highest point. Lap sheets shingle fashion so as to constantly shed water

D. All slopes greater than 2:12 require back-nailing to prevent slippage of the ply sheets. Use ring or spiral-shank 1 inch cap nails, or screws and plates at a rate of 1 fastener per ply

(including the membrane) at each insulation stop. Place insulation stops at 16 ft o.c. for slopes less than 3:12 and 4 feet o.c. for slopes greater than 3:12. On non-insulated systems, nail each

Bid # D00226 Health Department Bituminous Roof Replacement ply directly into the deck at the rate specified above. When slope exceeds 2:12, install all plies parallel to the slope (strapping) to facilitate backnailing. Install 4 additional fasteners at the upper edge of the membrane when strapping the plies.

3.4 INSTALLATION ROOF INSULATION

A. Roof Insulation: Roof insulation is specified in Section 2.2.

1. The surface must be thoroughly cleaned using compressed air, vacuum equipment or hand/power brooms to remove dust, loose dirt or debris.

2. Insulation thicker than 2.5” shall be installed in multiple layers. All joints between layers should be staggered when multiple layer of insulation is installed.

3. Insulation shall be kept dry at all times. Install only as much insulation as can be covered with the completed roofing membrane before the end of the day's work or prior to onset of inclement weather.

4. Edges shall butt tightly, and all cuts shall fit neatly against adjoining surfaces to provide a smooth overall surface. Gaps of greater than 1/4-inch width shall be filled with insulation.

5. Install tapered insulation around roof drains and penetrations to provide adequate slope for proper drainage.

6. 4’ X 4’ tapered sumps shall be installed at all drain areas.

7. Adhered insulation shall be installed in accordance with code and insurance requirements for the applicable geographic zone with the required number and type of fasteners and plates.

8. The insulation shall be fastened per the following spacing and patterns.

a. Zone 1: 12” O.C.

b. Zone 2: 12” O.C.

c. Zone 3: 12” O.C.

B. Roof Cover Boards: Roof cover boards are specified in Section 2.2.

1. The surface must be thoroughly cleaned using compressed air, vacuum equipment or hand/power brooms to remove dust, loose dirt or debris.

2. Edges shall butt tightly, and all cuts shall fit neatly against adjoining surfaces to provide a smooth overall surface.

3. Apply specified insulation adhesive directly to the newly installed polyisocyanurate insulation in a ribbon pattern. Immediately place the recovery board into the wet adhesive. Do not slide the recovery board into the adhesive. Do not allow the adhesive to skin over. Briefly step each board into place to ensure contact with the adhesive.

Substrates with irregular of uneven surfaces may prevent the insulation from making positive contact with the adhesive. In these cases, relief cuts or a temporary weight may be required.

4. The cover boards shall be adhered per the following spacing and patterns:

Bid # D00226 Health Department Bituminous Roof Replacement

a. Zone 1: 12” O.C.

b. Zone 2: 12” O.C.

c. Zone 3: 12” O.C.

3.5 INSTALLATION TORCH APPLIED 2-PLY ASPHALT ROOFING

A. Base Ply: Install torch base sheet to a properly prepared substrate. Shingle in proper direction to shed water on each area of roofing. If wood components are present at perimeters, flashings and penetration locations, an intumescent primer must be applied to the wood components prior to the application of the torch applied cap membrane. A self- adhering base sheet, intended for use with torch-applied cap sheets must also be applied around all perimeters, flashings, curbs and penetrations.

1. Lay out the roll in the course to be followed and unroll 6 feet (1.8 m).

2. Using a roofing torch, heat the surface of the coiled portion until the burn-off backer melts away. At this point, the material is hot enough to lay into the substrate.

Progressively unroll the sheet while heating and press down with your foot to insure a proper bond.

3. After the major portion of the roll is bonded, re-roll the first 6 feet (1.8 m) and bond it in a similar fashion.

4. Repeat this operation with subsequent rolls with side laps of 4 inches (101 mm) and end laps of 8 inches (203 mm).

5. Give each lap a finishing touch by passing the torch along the joint and spreading the melted bitumen evenly with a rounded trowel to insure a smooth, tight seal.

6. Extend underlayment 2 inches (50 mm) beyond top edges of cants at wall and projection bases.

7. Install base flashing ply to all perimeter and projections details.

B. Modified Cap (Ply) Sheet: Over torch base sheet underlayment, lay out the roll in the course to be followed and unroll 6 feet (1.8 m). Stagger seams over the torch base sheet seams.

1. Using a roofing torch, heat the surface of the coiled portion until the burn-off backer melts away. At this point, the material is hot enough to lay into the substrate.

Progressively unroll the sheet while heating and press down with your foot to ensure a proper bond.

2. After the major portion of the roll is bonded, re-roll the first 6 feet (1.8 m) and bond it in a similar fashion.

3. Repeat this operation with subsequent rolls with side laps of 4 inches (101 mm) and end laps of 8 inches (203 mm).

4. Give each lap a finishing touch by passing the torch along the joint and spreading the melted bitumen evenly with a rounded trowel to ensure a smooth, tight seal.

C. Fibrous Cant Strips: Provide non-combustible perlite or glass fiber cant strips at all wall/curb detail treatments where angle changes are greater than 45 degrees. Cant may be set in

Bid # D00226 Health Department Bituminous Roof Replacement approved cold adhesives, hot asphalt or mechanically attached with approved plates and fasteners.

D. Wood Blocking, Nailers and Cant Strips: Provide wood blocking, nailers and cant strips as specified in Section 06 11 00.

1. Provide nailers at all roof perimeters and penetrations for fastening membrane flashings and sheet metal components.

2. Wood nailers should match the height of any insulation, providing a smooth and even transition between flashing and insulation areas.

3. Nailer lengths should be spaced with a minimum 1/8-inch gap for expansion and contraction between each length or change of direction.

4. Nailers and flashings should be fastened in accordance with Factory Mutual "Loss

Prevention Data Sheet 1-49, Perimeter Flashing" and be designed to be capable of resisting a minimum force of 200 lbs/lineal foot in any direction.

5. All wood blocking, nailers, and cant strips, must be primed with an intumescent primer prior to the application of the base sheet.

E. Wood Component Intumescent Primer: Intumescent primer shall be applied to all wood components within perimeter conditions, flashing and penetrations, such as wood nailers, blocking sheathing, etc.

1. Before and during primer application, the substrates' surfaces shall be dry, clean and free from loose debris, dust, dirt, grease, oil, and all prior coating materials, such as paint, stains and sealers. The substrate shall not have, nor have been exposed to, treatments, chemicals, coatings, etc. prior to the application of the primer

2. Prior to application of primer, moisture content of the substrate must be verified to less than 16%

3. Apply intumescent at a rate of 1/2 gallon per 100 square feet (200 square feet per gallon)

4. Allow primer to cure prior to application of the base sheet and/or flashing plies.

F. Metal Work: Provide metal flashings, counter flashings, parapet coping caps and thru-wall in accordance with the SMACNA "Architectural Sheet Metal Manual" or the NRCA Roofing

Waterproofing manual.

G. Termination Bar: Provide a metal termination bar or approved top edge securement at the terminus of all flashing sheets at walls and curbs. Fasten the bar a minimum of 8 inches (203

mm) o/c to achieve constant compression. Provide suitable sealant at the top edge if required.

H. Flashing Base Ply: Seal all curb, wall and parapet flashings with an application of mastic and mesh on a daily basis. Do not permit conditions to exist that will allow moisture to enter behind, around or under the roof or flashing membrane.

1. Prepare all walls, penetrations, expansion joints, and other surfaces to be flashed with asphalt primer at the rate of 100 square feet per gallon. Allow primer to dry tack free.

2. Adhere modified flashing base to the underlying base flashing ply with specified flashing ply adhesive. Nail off at a minimum of 8 inches (203 mm) o.c. from the finished roof at all vertical surfaces.

Bid # D00226 Health Department Bituminous Roof Replacement

3. Solidly adhere the entire sheet of flashing membrane to the substrate. Tops of all flashings that are not run up and over curb shall be secured through termination bar 6 inches (152 mm) o.c. and sealed at top.

4. Coordinate counter flashing, cap flashings, expansion joints, and similar work with modified bitumen roofing work.

5. Coordinate roof accessories, miscellaneous sheet metal accessory items, including piping vents and other devices with the roofing system work. When using mineralized cap sheet all stripping plies type IV felt / VersiPly 40 shall be installed prior to cap sheet installation.

I. Flashing Cap Ply: Install flashing cap sheets by the same application method used for the base ply.

1. Seal curb, wall, and parapet flashings with an application of mastic and mesh on a daily basis. Do not permit conditions to exist that will allow moisture to enter behind, around or under the roof or flashing membrane.

2. Prepare all walls, penetrations, expansion joints and where shown on the Drawings to be flashed with required primer at the rate of 100 square feet per gallon. Allow primer to dry tack free.

3. Adhere to the underlying base flashing ply with specified flashing ply adhesive unless otherwise specified. Nail off at a minimum of 8 inches (203 mm) o.c. from the finished roof at all vertical surfaces.

4. Coordinate counter flashing, cap flashings, expansion joints and similar work with modified bitumen roofing work as specified.

5. Coordinate roof accessories, miscellaneous sheet metal accessory items with the roofing system work.

6. All stripping shall be installed prior to flashing cap sheet installation.

7. Heat and scrape granules when welding or adhering at cut areas and seams to granular surfaces at all flashings.

8. Secure the top edge of the flashing sheet using a termination bar only when the wall surface above is waterproofed or nailed 4 inches o.c. and covered with an acceptable counter flashing.

9. Seal all vertical laps of cap flashing ply with a three-course application of trowel-grade mastic and fiberglass mesh.

J. Roof Walkways: Provide walkways in areas indicated on the Drawings.

3.6 INSTALLATION EDGE TREATMENT AND ROOF PENETRATION FLASHING

A. Raised Metal Edge:

B. Inspect the nailer to ensure proper attachment and configuration.

1. Run base ply over the edge. Assure coverage of all wood nailers. Fasten plies with ring shank nails at 8 inches (203 mm) o.c.

2. Install continuous cleat and fasten at 6 inches (152 mm) o.c.

Bid # D00226 Health Department Bituminous Roof Replacement

3. Install new metal edge hooked to continuous cleat and set in bed of roof cement. Fasten flange to wood nailer every 3 inches (76 mm) o.c. staggered.

4. Prime metal edge and allow to dry. Do not prime for Green-Lock System lightly sand metal to improve bond.

5. Strip in flange with base flashing ply covering entire flange in bitumen with 6 inches

(152 mm) on to the field of roof. Assure ply laps do not coincide with metal laps.

6. Install a second ply of thermoplastic cap flashing ply heat welded over the thermoplastic cap ply, 9 inches (228 mm) on to the field of the roof.

C. Expansion Joint:

1. Minimum curb height is 8 inches (203 mm) above finished roof height. Chamfer top of curb. Prime vertical curb and allow to dry.

2. Mechanically attach wood cant to expansion joint nailers. Run all base field plies over cant a minimum of 2 inches (50 mm).

3. Install compressible insulation in neoprene cradle.

4. Install base flashing ply covering curb set in bitumen with 6 inches (152 mm) on to field of the roof.

5. Then install thermoplastic cap field ply run over the base flashing ply in bitumen or foam adhesive.

6. Install the thermoplastic flashing ply in bitumen or foam over the base flashing ply, 9 inches (228 mm) on to the field of the roof.

7. Install pre-manufactured expansion joint cover. Fasten sides at 12 inches (609 mm) o.c.

with fasteners and neoprene washers. Furnish all joint cover laps with butyl tape between metal covers.

D. Area Divider:

1. Minimum curb height is 8 inches (203 mm) above finished roof height. Prime vertical curb at a rate of 100 square feet per gallon and allow to dry.

2. Set cant in bitumen. Run all base field plies over cant a minimum of 2 inches (50 mm).

3. Install base flashing ply covering wall set in bitumen with 6 inches (152 mm) on to the base field ply and set in bitumen.

4. Then install thermoplastic cap field ply run over the base flashing ply in bitumen or foam adhesive.

5. Install the thermoplastic flashing ply in bitumen or foam over the base flashing ply, 9 inches (228 mm) on to the field of the roof.

6. Install pre-manufactured cover. Fasten sides at 24 inches (609 mm) o.c. with fasteners and neoprene washers through slotted holes. Furnish all joint cover laps with butyl tape between metal covers.

Bid # D00226 Health Department Bituminous Roof Replacement

E. Exhaust Fan:

1. Minimum curb height is 8 inches (203 mm) above finished roof height. Prime vertical and allow to dry.

2. Set cant in bitumen. Run all base field plies over cant a minimum of 2 inches (50 mm).

3. Install base flashing ply covering wall set in bitumen with 6 inches (152 mm) on to the base field ply and set in bitumen. Then install thermoplastic cap field ply run over the base flashing ply in bitumen or foam adhesive.

4. Install the thermoplastic flashing ply in bitumen or foam over the base flashing ply, 9 inches (228 mm) on to the field of the roof.

5. Install metal exhaust fan over the wood nailers and flashing to act as counterflashing.

Fasten per manufacturer's recommendation.

F. Retrofit Roof Drain:

1. Plug drain to prevent debris from entering plumbing.

2. Run complete roof system plies over drain. Cut out plies inside drain bowl.

3. Set 4lb. lead flashing (thirty (30) inch square minimum) in ¼ inch bed of mastic. Run lead into drain a minimum of two (2) inches. Prime lead at a rate of one hundred (100) square feet per gallon and allow to dry.

4. Install base flashing ply (forty (40) inch square minimum).

5. Install modified membrane (forty-eight (48) inch square minimum) in the specified cold applied flashing adhesive. Stop both flashings plies short of the clamping ring and seal edge of modified flashing plies with a three-course application of SILVER-FLASH aluminized mastic and reinforcing mesh.

6. Install new retrofit drain per the manufacturer's specifications.

7. Remove drain plug and install strainer.

8. In an 8’ x 8’ square around each drain install two coats of white silicone coating with a bleed blocking primer. The area to be taped off prior to coating to create a clean outline.

G. Surface Mounted Counterflashing:

1. Minimum flashing height is 8 inches (203 mm) above finished roof height. Maximum flashing height is 24 inches (609 mm). Prime vertical wall at a rate of 100 square feet per gallon and allow to dry.

2. Set cant in bitumen. Run all field plies over cant a minimum of 2 inches (50 mm).

3. Install base flashing ply covering wall set in bitumen with 6 inches (152 mm) on to field of the roof.

4. Install a second ply of modified flashing ply in bitumen over the base flashing ply, 9 inches (228 mm) on to the field of the roof. Apply a three-course application of mastic and mesh at all vertical seams and allow to cure and aluminize.

5. Apply butyl tape to wall behind flashing. Secure termination bar through flashing, butyl tape and into wall. Alternatively use caulk to replace the butyl tape.

Bid # D00226 Health Department Bituminous Roof Replacement

6. Secure counterflashing set on butyl tape above flashing at 8 inches (203 mm) o.c. and caulk top of counterflashing.

H. Manufactured Wall Panel W/Modified Roof/Flashing (Slip Flashing):

1. Minimum flashing height is 8 inches (203 mm) above finished roof height. Prime vertical wall at a rate of 100 square feet per gallon and allow to dry.

2. Set cant in bitumen. Run all plies over cant a minimum of 2 inches (50 mm).

3. Install base flashing ply covering wall with 6 inches (152 mm) on to field of the roof.

4. Install a second ply of modified flashing ply in bitumen over the base flashing ply, 9 inches (228 mm) on to the field of the roof. Apply a three-course application of mastic and mesh at all vertical seams and allow to cure and aluminize.

5. Install manufacturer's standard hat channel into the top of the modified membrane to act as a termination bar.

6. Install hat channels vertically spaced up the wall and fastened in accordance with the wind uplift calculation requirements.

7. Install the uppermost hat channel at the bottom edge of the coping cap. Insert rigid insulation between the hat channels. Place manufacturer's standard seam tape on top of all hat channels.

8. Fasten the first manufactured wall panel vertically plumb and fasten every 6 inches (152

mm) o.c. Install adjoining panels by engaging the opposing interlocking seam and fastening as described above.

9. Complete inside and outside corners by installing prefabricated corners or job site breaking a full width panel to accommodate the corner, so that the sides engage the lock of the panels to the corner areas.

10. Trim excess seam tape and seam raw edges with manufacturer's…