70ROOFI9525_IFB.pdf.pdf

I-95 North Bound Visitor Center Building Roof Repair Solicitation #: 70ROOFI95NB25 IFB Document

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STATE OF MARYLAND

STATE HIGHWAY ADMINISTRATION

SHA

INVITATION FOR BIDS (IFB)

I-95 NORTH BOUND VISITOR CENTER BUILDING ROOF REPAIR

IFB NUMBER 70ROOFI95NB25

ISSUE DATE: 01/17/25

A Prospective Bidder that has received this document from a source other than eMarylandMarketplace Advantage (eMMA) https://procurement.maryland.gov should register on eMMA https://emma.maryland.gov/

NOTICE TO BIDDERS

SMALL BUSINESS RESERVE PROCUREMENT

This is a Small Business Reserve Procurement for which the award will be limited to certified small business vendors. Only businesses that meet the statutory requirements set forth in State Finance and Procurement Article, §§14-501—14-505, Annotated Code of Maryland, and that are certified by the Governor’s Office of Small, Minority & Women Business Affairs (GOSBA) Small Business Reserve Program are eligible for award of a contract. Before awarding a contract under a procurement designated as a small business reserve procurement, the Procurement Officer shall verify that the apparent awardee is certified by the GOSBA as a small business through eMMA. However, if small businesses do not show interest in this solicitation, the Procurement Officer has the right to remove the SBR designation via an Amendment on eMMA.

MINORITY BUSINESS ENTERPRISES ARE ENCOURAGED TO RESPOND TO THIS

SOLICITATION.

https://procurement.maryland.gov/ https://emma.maryland.gov/ https://gomdsmallbiz.maryland.gov/Pages/sbr-program.aspx https://gomdsmallbiz.maryland.gov/Pages/sbr-program.aspx

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KEY INFORMATION SUMMARY SHEET (KISS)

Invitation for Bids Maintenance, I-95 North Bound Visitor Center Building Roof Repair

Solicitation Number:

70ROOFI95NB25

IFB Issue Date: 01/17/25

IFB Issuing Office:

State Highway Administration

Procurement Officer:

Stephen Rush 4401 State Route 32, Dayton, MD 21036

Email:

Phone Number:

srush2@mdot.maryland.gov

410-531-5533

Bids are to be sent to:

State Highway Administration, 4401 State Route 32, Dayton, MD 21036 Attention: Stephen Rush

No Bid Notice Feedback Form

N/A

Pre-Bid Conference:

January 22, 2025, at 10:00 A.M. Local Time at the I-95 North Bound Visitor Center Building in Laurel, MD

Scheduled Site Visit

N/A

Questions Due Date and Time:

January 27, 2025, at 2 P.M. Local Time

Bid Due (Closing) Date and Time:

January 31, 2025, at 2 P.M. Local Time

Public Bid Opening Date, Time, and Location

January 31, 2025, at 2 P.M. Local Time State Highway Administration, 4401 State Route 32, Dayton, MD 21036

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MBE [[OR]] DBE

Subcontracting Goal:

An overall Minority Business Enterprise (MBE) or Disadvantaged Business Enterprise (DBE) subcontract participation goal of __0___ percent of the total contract dollar amount, including all renewal option terms, if any, has been established for this procurement. The overall MBE or DBE subcontract participation goal includes the following subgoals, which have been established for this procurement:

_N/A____% for African-American MBEs;

_N/A___% for Asian-American MBEs;

_N/A____% for Hispanic-American MBEs; and

_N/A____% for Woman-Owned MBEs.

VSBE

Subcontracting Goal:

This solicitation includes a VSBE participation Goal of __0___%

Procurement Method:

A Contract will be awarded in accordance with the Competitive Sealed Bidding method under COMAR 21.05.02.

Multiple or Alternate Bids:

Multiple or alternate Bids will not be accepted.

Contract Type: Fixed Price with Cost Adjustment

Contract Duration:

Once Awarded Contract will begin until finished, not more than 30 days unless weather related.

Primary Place of Performance:

I-95 North Bound Visitor Center Building, Laurel, MD

SBR Designation: Yes

Federal Funding: No

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Table of Contents - IFB

1 Minimum Qualifications

1.1 Bidder Minimum Qualifications

2 Contractor Requirements: Scope of Work

2.1 Summary Statement

2.2 Background and Purpose

2.2.1 Project Goals ................................................................ Error! Bookmark not defined.

2.2.2 State Staff and Roles

2.2.3 Other State Responsibilities ......................................... Error! Bookmark not defined.

2.3 Contractor Responsibilities and Tasks

2.4 Supplemental Category of Work Requirements and Responsibilities

3 Standard Terms and Conditions

3.1 Contract Initiation Requirements

3.2 End of Contract Transition

3.3 Invoicing

3.3.1 Invoice Submission Schedule

3.3.2 Deliverable Invoicing ................................................... Error! Bookmark not defined.

3.3.3 Labor Hour/Time and Materials Invoicing ................... Error! Bookmark not defined.

3.3.4 Travel Reimbursement.................................................. Error! Bookmark not defined.

3.4 Liquidated Damages ................................................................... Error! Bookmark not defined.

3.4.1 MBE Liquidated Damages ........................................... Error! Bookmark not defined.

3.4.2 Liquidated Damages other than MBE .......................... Error! Bookmark not defined.

3.4.3 Problem Escalation Procedure ...................................... Error! Bookmark not defined.

3.5 Work Orders

3.6 Payments by Electronic Funds Transfer

3.7 Prompt Payment Policy

3.8 Federal Funding Acknowledgement

3.9 Conflict of Interest Affidavit and Disclosure

3.10 Non-Disclosure Agreement

3.10.1 Non-Disclosure Agreement (Bidder/Offeror)

3.10.2 Non-Disclosure Agreement (Contractor)

3.11 Maryland Healthy Working Families Act Requirements

3.12 The State of Maryland’s Commitment to Purchasing Environmentally Preferred Products and

Services (EPPs)

3.13 Insurance Requirements

4 Bid Submission Information and Instructions

4.1 eMaryland Marketplace Advantage (eMMA)

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4.2 Electronic Means

4.3 Pre-Bid Conference

4.4 Questions

4.5 Bid Due (Closing) Date and Time

4.6 Receipt, Opening and Recording of Bids

4.7 Duration of Bids

4.8 Revisions to the IFB

4.9 Cancellations

4.10 Incurred Expenses

4.11 Protest/Disputes

4.12 Bidder Responsibilities

4.13 Acceptance of Terms and Conditions

4.14 Compliance with Laws/Arrearages

4.15 Verification of Registration and Tax Payment

4.16 False Statements

4.17 Confidentiality of Bids / Public Information Act Notice

4.18 Use of Bidder’s Form Not Binding on State

4.19 Attachments and Documents Required with the Bid (Table A)

4.20 Bid Delivery Instructions

4.21 Bid Evaluation Criteria and Award Basis

4.22 Tie Bids

4.23 Reciprocal Preference

4.24 Documents Required upon Notice of Recommendation for Contract Award (Table B)

5 IFB Appendices and Exhibits

5.1 Appendices (Table C)

5.2 Exhibits (Table D)

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1 Minimum Qualifications

1.1 Bidder Minimum Qualifications

The Bidder must document in its Bid that it satisfies the following Minimum Qualifications:

A. The Bidder shall have three (3) years of experience providing roofing services. Required Documentation: The Bidder shall provide with its Bid three or more references from the past five years that collectively are able to attest to the Bidder’s required years of experience in providing..

THE REMAINDER OF THIS PAGE IS INTENTIONALLY LEFT BLANK.

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2 Contractor Requirements: Scope of Work

2.1 Summary Statement

This Invitation for Bids (IFB) is issued to procure the goods or services, as specified in this Section 2, from a contract between the successful bidder(s) and the State of Maryland (“State”): It is the State’s intention to obtain goods and services, as specified in this IFB, from a contract between the selected Bidder and the State. The Maryland Department of Transportation (MDOT) State Highway Administration (SHA) is soliciting bids for a qualified contractor to provide roof repair at the I-95 North Bound Visitor Center in Laurel, MD.

This work includes all labor, materials, parts, service, and transportation to ensure the satisfactory performance of the roof repair. This will be a Lump Sum Bid. The Contractor shall inspect work to ensure proper installation in accordance with the specification in the Invitation for Bids.

2.1.1 This is a single award IFB

2.2 Background and Purpose

2.2.1 State Staff and Roles

In addition to the Procurement Officer and Contract Monitor, the State Highway Administration

State Project Manager

A. The State Project Manager is responsible for ensuring any other hidden cost, i.e. deck replacement (4X8) sheets of plywood, must be verified between the Contractor and State Project Manager prior to replacement.

2.3 Contractor Responsibilities and Tasks

STATEMENT OF WORK REROOFING AND RELATED WORK

MARYLAND DEPARTMENT OF TRANSPORTATION

STATE HIGHWAY ADMINISTRATION

8401 I-95 North Bound Savage, Maryland

Visitors Center Building

I. WORK SCOPE

A. General:

1. The existing roofing membrane, tapered roof system, flashings, and drainage provisions located above the rear conference room has failed. In order to properly restore the roof covering system to a watertight condition the SHA is considering bids for the replacement of the tapered roofing system, and roof drainage provisions; (metal comping flashing shall be salvaged and reused).

Contractor shall be responsible for all administration, labor, material, and equipment required to complete the work of this Statement of Work.

B. Work Items:

1. Submit all project information to the System Manufacturer for review and approval.

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a. Provide proof of the System Manufacture’s review and approval by providing to the SHA review comments, proposed changes to the work and determination of Warranty issuance.

2. Completely remove, and legally dispose of, of a 24’X 24’ the tapered roof assembly including plywood roof deck down to stringers.

3. Substrate Preparation in accordance with the System Manufacturer’s requirements.

4. Install new ½” plywood roof deck.

5. Install new tapered roof system including gypsum cap sheet to achieve proper slope to the roof drain system.

6. Install a new, heat welded single ply (TPO 060 or approved equal) PVC Roofing System:

a. System shall include membrane, associated membrane flashings, and sealants

b. (Metal comping caps shall be reused).

c. Reinstall existing perimeter metal edge Coping per NRCA / SMACNA and System manufacturer specifications.

7. Provide a five (5) year Roof System Warranty from the manufacturer covering all materials as well as the installation of those materials.

8. The Contractor shall provide a two (2) year Workmanship Warranty for all installations.

C. Submittals:

1. At the time of bidding, the Applicator shall submit to the Owner (or Representative) the following:

a. Provide proof of the System Manufacture’s review and approval by providing to the SHA review comments, proposed changes to the work and determination of Warranty issuance;

1) Technical acceptance from Sika Sarnafil;

2) Dimensioned shop drawings by the Roof System Manufacturer which shall include:

(i) Outline of roof with roof size and elevations shown;

(ii) For insulation layout, as applicable;

(iii) Sheet metal work details;

(iv) Details of flashing methods for penetrations;

3) Copies of Specification;

4) Certifications by manufacturers of roofing and insulating materials that all materials supplied comply with requirements of ASTM and other industry standards or practices.

b. Samples of each primary component to be used in the roof system and the manufacturer's current literature for each component.

c. Sample Warranty:

1) A facsimile of the Warranty that will be issued by the Roof System manufacturer at the completion of the Project and subsequent inspection by the manufacturer for the sole purpose of Warranty issuance.

2) Sample copy of Applicator's warranty.

d. Certification from the Applicator that the system specified meets all identified code and insurance requirements as required by the Specification;

e. Material Safety Data Sheets (MSDS)

f. Technical Data - for each product / material showing compliance to the standards referenced in the specification;

2. Submit all requested, and/or relevant information to the District Rep for review by FMD;

a. Review of submitted material shall be complete within ten (10) working days;

b. Comments will be provided to the Contractor for response and/or resubmittal.

D. Job Conditions:

1. All work shall comply with the requirements of the 2023 Edition of the SHA Standard

Specifications for Construction and Materials (@ www.roads.maryland.gov ).

2. No phased construction will be allowed. All membrane flashings adjacent to new roofing shall be completed and finish-troweled at the end of each day’s work. All seams shall be heat welded before leaving the job site that day.

a. Uninterrupted water stops shall be installed at the end of each day's work and shall be completely removed before proceeding with the next day's work.

http://www.roads.maryland.gov/

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b. All work shall be scheduled and executed without exposing the interior building areas to the effects of inclement weather;

1) The existing building and its contents shall be protected against all risks.

3. The Contractor shall meet with SHA representatives at the job site, prior to commencement of work, to discuss job coordination, staging areas, storage areas for materials, daily procedure of construction personnel, job site safety and security, and other project logistics. The Contractor’s superintendent and project foreman are required to attend this meeting as well.

4. The Contractor shall engage in meaningful coordination with the Owner, and operator, of the facility. Coordination shall address items such as, but not limited to:

a. Lifting operations;

b. Materials storage;

c. Debris removal;

d. Construction near entrances;

e. Construction zone controls;

5. Additionally, the contractor shall coordinate the construction activities with the Owner, operator, and local traffic authorities in regard to potential:

a. Traffic re-routing;

b. Desired Lane closures, as applicable;

c. Site security issues, including security issues inside the facility.

6. The Contractor (and all Subcontractors) shall fully investigate all stages of work to be performed, for all project areas; the Contractor shall immediately inform the SHA project manager, in writing, of any unacceptable or hidden conditions that may affect the work, and shall not proceed with work until such conditions are made acceptable to the Contractor and SHA.

7. The Contractor shall furnish all professionally qualified (English speaking) supervision to oversee all job site operations.

8. The Contractor shall repair and/or replace all work installed by the Contractor that is, in the opinion of the SHA, deficient, including any conditions that may diminish the life expectancy or performance of the new roofing/flashing work; such repair and/or replacement work shall be performed immediately upon the request of the Engineer, and at no additional cost to SHA.

9. The Contractor shall be present at the job site during all project activities, including Subcontractor work and all other outside personnel such as material deliveries, equipment operators, manufacturer’s representatives, etc.

10. All work shall be performed in compliance with all applicable building codes.

11. The applicator shall submit evidence that the proposed roof system has been tested and approved or listed by the following test organizations. These requirements are minimum standards, and no roofing work shall commence without written documentation of the system's compliance, as required in the "Submittals" section of this specification.

a. Factory Mutual Research Corporation (FM) - Norwood, MA

1) Class 1-90 (for high wind exposure)

b. Underwriters Laboratories, Inc. - Northbrook, IL

1) Class A assembly

E. Quality Assurance

1. This roofing system shall be applied only by a Roofing Contractor authorized by Sika Sarnafil prior to bid (Sika Sarnafil "Applicator");

a. Roofing Contractor Qualifications: The Roofing Contractor shall specialize in roof covering system specified, with a minimum of 5 years’ experience, and who is certified by the roof covering system manufacturer as qualified to install the Manufacturer’s roofing materials.

2. Upon completion of the installation and the delivery to Sika Sarnafil by the Applicator of a certification that all work has been done in strict accordance with the contract specifications and Sika Sarnafil's requirements, an inspection shall be made by a Technical Representative of Sika Sarnafil to review the installed roof system.

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3. There shall be no deviation made from the Project Specification or the approved shop drawings without prior written approval by the Owner, the Owner's Representative and Sika Sarnafil.

4. All work pertaining to the installation of Sarnafil membrane and flashings shall only be completed by Applicator personnel trained and authorized by Sika Sarnafil in those procedures.

F. Safety:

1. The Contractor shall be entirely responsible for all safety on the job site and project premises and shall comply with all applicable OSHA and MOSH and SHA requirements.

2. The Contractor shall provide all necessary safety equipment including (but not limited to) barricades, flags, signs, traffic cones, safety rails, and all other equipment needed to conduct safe operations on the roof, ground, and premises.

3. The Contractor shall install, maintain, and be responsible for the safe use of all ladders, scaffolding, etc.; to access the work.

4. The Contractor shall respond immediately to all reports of leakage at the project and make emergency repairs as necessary to stop such leakage.

G. Fire Protection: No ‘Open Flame’ operations are anticipated

1. All necessary precautions and care shall be used to prevent accidental fire:

2. Furnish two fully charged and operable ABC fire extinguishers for each torch and soldering apparatus used on the project. Fire extinguishers shall be readily visible within 50 feet of all operations.

THIS WILL BE STRICTLY ENFORCED.

3. Store all flammable liquids, oils, solvents, and thinners in one central location, at least 75 feet away from all torches and equipment operation.

4. Remove combustible rubbish materials and empty cans of combustible materials each day and safely dispose of same in accordance with requirements of authorities having jurisdiction;

5. All areas of newly-placed roof covering shall be closely inspected for fire/smoke/smoldering at the end of each day before the Contractor’s personnel leave the job site, and the job foreman is responsible for inspecting the area for fire for no less than 45 minutes after the last torch/soldering apparatus is extinguished for the day.

a. Special precautions shall be taken when torching/soldering near wood and other flammable substrates. The above Fire Watch shall be extended to 1.5 hours after the last torch/soldering apparatus is extinguished for the day.

H. Product Delivery, Storage and Handling

1. All products delivered to the job site shall be in the original unopened containers or wrappings bearing all seals and approvals;

2. Handle all materials and store materials in compliance with manufacturer’s requirements to prevent damage;

a. All adhesives shall be stored at temperatures between 40º F and 80º F.

3. All materials which are determined to be damaged by the Owner's Representative or Sika Sarnafil are to be removed from the job site and replaced at no cost to the Owner.

I. Housekeeping:

1. The Contractor (and all Subcontractors) shall keep all areas of the project in a clean, neat, and orderly condition at all times; trash and debris shall be cleaned up and removed on a regular basis; caution shall be exercised to prevent objects, debris, bitumen, etc. from falling from the roof, particularly around the building entrances.

2. The Contractor shall be fully aware at all times of the high volume of pedestrian and vehicular traffic into and around this facility, and that the facility is active at all times. The Contractor shall not at any time impede the flow of pedestrian access to the building, with the exception of momentary closures of a particular entrance/area during hoisting operations, or as required for personal safety. Fire/emergency exits shall not be blocked or otherwise affected; the Contractor shall provide a person(s) on the ground to safely direct pedestrian/vehicular traffic around dangerous areas.

J. Protection of Construction:

1. Protect all exterior and interior building surfaces against damage from all work operations and potential leakage; foot traffic inside the building shall be minimal and restricted due to the

IFB for State Highway Administration, Dayton Shop Page 11 of 39 restroom building being closed, and shall be coordinated and scheduled; protect floors, stairways, sidewalks, walls, etc. from damage.

2. Protect all existing roof covering systems and all newly-placed work as necessary from damage caused by foot and equipment traffic, dirt, debris, tools, equipment, materials, etc.; protect all existing/new roof and flashing membrane, as necessary, with a full layer of protection course, such as asphaltic board, plywood, insulation, or other material approved by the Engineer; under no circumstances shall materials or work be staged on unprotected roofing.

K. Warranties:

1. Sika Sarnafil System Warranty: System Warranty or approved equal

a. Upon successful completion of the work to Sika Sarnafil's, or approved equal satisfaction and receipt of final payment, the Sika Sarnafil System Warranty shall be issued.

b. Applicator/Roofing Contractor Warranty:

1) The Applicator shall supply the Owner with a separate workmanship warranty:

(i) In the event any work related to roofing, flashing, or metal is found to be within the Applicator warranty term, defective or otherwise not in accordance with the Contract Documents, the Applicator shall repair that defect at no cost to the Owner.

The Applicator's warranty obligation shall run directly to the Owner, and a copy shall be sent to Sika Sarnafil.

c. Owner Responsibility:

1) Owner shall notify both Sika Sarnafil and the Applicator of any leaks as they occur during the time period when both warranties are in effect.

II. MATERIALS

A. Scope: Install a complete, Warrantable, Fully Adhered PVC Roofing System including roof decking, tapered insulation, membrane, flashings and all other Components required for a complete and Warrantable Roof System.

1. The ‘Basis Of Design’ System is a fully adhered PVC roof as designed and manufactured by SikaSarnafil, Canton, MA 02021, or approved equal. The components of the Sarnafil Adhered roof system are to be products of Sika Sarnafil as indicated on the Detail Drawings and specified in the Contract Documents.

2. Components to be used that are other than those supplied or manufactured by Sika Sarnafil may be submitted for review and acceptance by Sika Sarnafil. Sika Sarnafil's acceptance of any other product is only for a determination of compatibility with Sika Sarnafil products and not for inclusion in the Sika Sarnafil warranty. The specifications, installation instructions, limitations, and/or restrictions of the respective manufacturers must be reviewed by the Owner's Representative for acceptability for the intended use with Sika Sarnafil products.

B. Roof System Components:

1. Sarnafil G410 Feltback fiberglass reinforced membrane with a lacquer coating Firestone reinforced membrane with a lacquer coating or approved equal.

a. Membrane shall conform to ASTM D4434 (latest version), "Standard for Polyvinyl

Chloride Sheet Roofing". Classification: Type II, Grade I.

1) Reinforcing Material - Fiberglass

b. Sarnafil G410-15, 60 mil (1.5 mm), thermoplastic membrane with fiberglass reinforcement;

1) Certified Polymer Thickness:

(i) Membrane manufacturer is to certify that the polymer thickness is of the polymer thickness specified. Certification is to be signed by the membrane manufacturer’s quality control manager. ASTM +/- tolerance for membrane thickness is not accepted.

c. Color of Membrane:

1) EnergySmart (white), initial reflectivity of 0.83, initial emissivity 0.90, solar reflective index (SRI) of >104.

2) Typical Physical Properties:

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Parameters ASTM Test Method Minimum ASTM Requirement PVC Physical Properties

Overall Thickness, min., inches (mm) D638 0.045 (1.14) 0.0 inches

Tensile Strength, min., psi (MPa) D638 1500 (10.4) 1600 (11.1)

Elongation at Break, min.

(machine x transverse) D638 250% / 230% 270% / 250%

Seam strength min.

(% of tensile strength) D638 75 80

Retention of Properties After Heat Aging

D3045 - -

Tensile Strength, min., (% of original) D638 90 95

Elongation, min., (% of original) D638 90 90

Tearing Resistance, min., lbf (N) D1004 10 (45.0) 14 (63.0)

Low Temperature Bend, -40º F (-40º C) D2136 Pass Pass

Accelerated Weathering

Test (Xenon Arc) D2565 5,000 Hours Pass

Cracking (7x magnification) None None

Discoloration (by observation) Negligible Negligible

Crazing (7 x magnification) None None

Linear Dimensional Change

D1204 0.10 % 0.02%

Weight Change After Immersion in Water

D570 ± 3.0% 2.5%

Static Puncture Resistance, 33 lbf (15 kg)

D5602 Pass Pass

Dynamic Puncture Resistance, 7.3 ft-lbf (10 J)

D5635 Pass Pass

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2. Flashing Materials:

a. Wall/Curb Flashing

1) Sarnafil G410, or approved equal Membrane: A fiberglass reinforced membrane adhered to approved substrate using Sarnacol, Firestone or approved equal adhesive.

2) Sarnafil G459 Membrane: An asphalt-resistant, fiberglass reinforced membrane adhered to approved substrate using Sarnacol , or approved equaladhesive.

3) Sarnaclad, or approved equal: A PVC-coated, heat-weldable sheet metal capable of being formed into a variety of shapes and profiles:

(i) Sarnaclad, or approved equal: 25 gauge, G90 galvanized metal sheet with a 20 mil (1 mm) unsupported Sarnafil membrane laminated on one side.

4) Miscellaneous Flashing:

(i) Sarnastack, or approved equal: Prefabricated vent pipe flashing made from 0.048 inch (48 mil/1.2 mm) thick Sarnafil G410, Firestone or approved equal membrane.

(ii) Sarnacircle, or approved equal-"G": Circular 0.048 inch (48 mil/1.2 mm) thick

G410 membrane patch welded over T-joints formed by overlapping thick membranes;

(iii) Sarnacorners, or approved equal: Universal Prefabricated outside and inside flashing corners made of 0.060 inch (60 mil/1.5 mm) thick membrane that are heat-welded to membrane or Sarnaclad, or approved equal base flashings;

(iv) Multi-Purpose Sealant: A proprietary sealant used at flashing terminations.

(v) Sarnafelt, or approved equal: A non-woven polyester or polypropylene mat cushion layer that is necessary behind G410 or G459 Flashing Membrane when the flashing substrates are rough or incompatible with the flashing membrane.

3. Insulation/Overlayment/Recover Board:

a. Overlayment: Gypsum board as required by Roof System manufacturer meeting the following:

1) ¼” thick;

2) Square edges;

3) water resistant and moisture resistant treated gypsum core;

4) glass mat facings embedded into front and back of sheet;

5) As manufactured by Georgia Pacific for inclusion in roof systems.

b. Insulation: Polyisocyanurate foam insulation

1) 2-inches thick to vary to one half inch thick as reqiuere;

2) Square edges and uniform thickness;

3) Compressive strength: 20 psi;

4) Density: 2 pcf;

5) Boards shall be mated to a glass reinforced facer on both sides;

6) As manufactured by a recognized member of PIMA (Polyisocyanurate Insulation

Manufacturer’s Association) and as acceptable to the Roof System manufacturer.

4. Attachment Components:

a. Membrane Adhesive:

1) Sarnacol 2170, or approved equal Adhesive: A solvent-based reactivating-type adhesive used to attach the membrane to the substrate, either horizontally or vertically.

Consult Product Data Sheets for additional information;

2) Application rates are as follows:

(i) Adhesive Rates - Gallons/100 SF:

1. Due to an increase in viscosity when outdoor temperatures during installation are below 40º F (5º C), add ½ gal/100 ft² to rate for estimating purposes;

2. Do not install when air temperature is within 5º F of dew point. Solvent evaporation time increases significantly when temperatures drop;

3. Ensure first layer of Sarnacol 2170, or approved equal is fully dry before second layer is applied to the back of the membrane for proper reactivation.

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(ii) Use a water-filled, foam-covered lawn roller to consistently and evenly press the membrane into the adhesive layer;

b. Fasteners and associated components:

1) Sarnaplate: a 3-0inch (75 mm) square or round, 26 gauge stamping of SAE 1010 steel with an AZ 55 Galvalume coating;

2) Sarnaplate-HD/CD: Used with Sarnafasteners to attach insulation boards to wood or concrete roof decks;

3) Sarnaplate-Preassembled: Combination of a 3-inch round plate and a #12 fastener;

4) Sarnafastener #12: A #12 corrosion-resistant fastener;

5) Sarnafastener-HD: A #14 corrosion-resistant fastener;

c. Change-Of-Plane securement components:

1) Sarnastop: a 1 inch (25 mm) wide, extruded flat aluminum bar 1/8 inch (3 mm) thick that has predrilled holes used to attach to the roof deck or to walls/curbs at terminations, penetrations and at incline changes of the substrate;

2) Sarnabar: An FM-approved, heavy-duty, 14 gauge, pre-punched with holes every 1 inch, galvanized or stainless, roll-formed steel bar used to attach membrane to roof decks;

3) Sarnacord: A 5/32-inch diameter, red-colored, flexible thermoplastic extrusion that is welded to the top surface of the Sarnafil or approved equal membrane and against the side of the Sarnabar, used to hold the membrane in position. Consult Product Data Sheet for additional information.

5. Sarnacol Lr-2001, or approved equal Deck Primers

a. Use As Directed And Required By Manufacturer For Warranty Issuance.

6. Miscellaneous Components:

a. Aluminum Tape: A 2 inch (50 mm) wide pressure-sensitive aluminum tape used as a separation layer between small areas of asphalt contamination and the membrane and as a bond-breaker under the cover strip at Sarnaclad joints.

b. Sealing Tape Strip;

c. Multi-Purpose Tape;

d. Sarnasolv: A high quality solvent cleaner used for the general cleaning of residual asphalt, scuff marks, etc., from the membrane surface. Sarnasolv is also used daily to clean seam areas prior to hot-air welding in tear off or dirty conditions or if the membrane is not welded the same day it is unrolled. Consult Product Data Sheet for additional information.

7. Sealants And Pitch Pocket Fillers

a. Sarnafil Multi-Purpose Sealant or approved equal (for termination details);

b. Sarnacol 2165 or approved equal Adhesive (two-component urethane adhesive for pitch pocket toppings).

c. Depending on substrates, the following sealants are options for temporary overnight tie-ins:

1) Type III hot asphalt conforming to ASTM D312 (latest version);

2) Sarnacol 2165or approved equal Adhesive;

3) Multiple layers of roofing cement and felt;

4) Spray-applied, water-resistant urethane foam;

5) Mechanical attachment with rigid bars and compressed sealant.

8. Miscellaneous Fasteners And Anchors

a. All fasteners, anchors, nails, straps, bars, etc. shall be post-galvanized steel, aluminum or stainless steel;

b. Mixing metal types and methods of contact shall be assembled in such a manner as to avoid galvanic corrosion;

c. Fasteners for attachment of metal to masonry shall be expansion type fasteners with stainless steel pins in pre-drilled holes:

1) All concrete fasteners and anchors shall have a minimum embedment of 1¼ inch (32

mm) and shall be approved for such use by the fastener manufacturer. N/A

2) All miscellaneous wood fasteners and anchors used for flashings shall have a minimum embedment of 1 inch (25 mm) and shall be approved for such use by the fastener manufacturer.

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9. Equipment: Sarnamatic 641mc or 661:

1) 220 volt, self-propelled, hot-air welding machine used to seal Sarnafil membrane seams.

2) Leister hand welder, as approved by Sika Sarna

C. Wood & Lumber: As required by System manufacturer

1. Treated wood nailers shall be installed at the perimeter of the entire roof and around such other roof projections and penetrations as specified on Project Drawings;

a. Wood nailers shall be treated for fire and rot resistance (Wolmanized or osmose treated) and be #2 quality or better lumber.

1) Creosote or asphalt treated wood is not acceptable. Wood nailers shall conform to

Factory Mutual Loss Prevention Data Sheet 1-49. All wood shall have a maximum moisture content of 19% by weight on a dry-weight basis;

D. Sheet Metal:

1. Flashing shapes and fabrication shall be

a. Coping on this project shall be salvaged and reused and if new is required it shall be pre-formed and pre-finished: The cost would be reflected in the bid pricing when submitting bid.

1) 24 gauge, 304 2B, stainless steel.

2) Color: brown.

b. All sheet metal work shall be detailed and fabricated in accordance with SMACNA;

III EXECUTION

A. Pre-Construction Conference:

1. The Applicator, Owner's Representative/Designer and Manufacturer(s) shall attend a pre-construction conference.

2. The meeting shall discuss all aspects of the project including but not limited to:

a. Safety;

b. Set up;

c. Construction schedule;

d. Contract conditions.

e. Coordination of the work

B. Substrate Preparation:

1. The roof deck and existing roof construction must be structurally sound to provide support for the new roof system.

a. The Applicator shall NOT load materials on the rooftop for storage.

2. The Owner's Representative shall ensure that the roof deck is secured to the structural framing according to local building code and in such a manner as to resist all anticipated wind loads in that location.

3. Removal of Existing Roofing General Criteria:

a. All existing roofing, base flashing, deteriorated wood blocking or deteriorated metal flashings shall be removed;

b. Remove only that amount of roofing and flashing which can be made weathertight with new materials during a one-day period or before the onset of inclement weather;

C. Substrate Inspection: Sarnafil shall be applied over compatible and accepted substrates only.

1. A dry, clean and smooth substrate shall be prepared to receive the n ew Adhered roof system;

2. The Applicator shall inspect the substrate for defects such as excessive surface roughness, contamination, structural inadequacy, or any other condition that will adversely affect the quality of work;

3. The substrate shall be clean, smooth, dry, free of flaws, sharp edges, loose and foreign material, oil and grease. Roofing shall not start until all defects have been corrected;

4. All roof surfaces shall be free of water, ice and snow.

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D. Wood Nailer Installation: Nailer attachment shall also meet the requirements of the current Factory Mutual Loss Prevention Data Sheet 1-49.

1. If required, install continuous wood nailers at the perimeter of the entire roof and around roof projections and penetrations as required by the manufacturer and as shown on the Detail Drawings;

2. Nailers shall be anchored to resist a minimum force of 300 pounds per lineal foot (4,500 Newtons/lineal meter) in any direction;

3. Individual nailer lengths shall not be less than 3 feet (0.9 meter) long;

a. Nailer fastener spacing shall be at 12 inches (0.3 m) on center or 16 inches (0.4 m) on center if necessary to match the structural framing;

b. Fasteners shall be staggered 1/3 the nailer width and installed within 6 inches (0.15 m) of each end. Two fasteners shall be installed at ends of nailer lengths;

4. Stainless steel, corrosion resistant, fasteners are required when mechanically attaching any Sika

Sarnafil product to wood nailers and wood products treated with ACQ (Alkaline Copper Quaternary). When ACQ treated wood is used on steel roof decks or with metal edge detailing, a separation layer must be placed between the metal and ACQ treated wood.

E. Insulation Installation: Install insulation assembly as required for warranty issuance.

1. Pre-cut all boards used at, or around, roof penetrations;

2. Pre-cut and install overlayment:

a. Do not allow board joints to align: Stagger all joints, and stagger joints layer-to-layer;

3. Secure insulation as required for FM I90 compliance;

4. Provide tapered edge stock for installation at the mouth of the roof scupper to promote drainage.

F. Installation Of Sarnafil Membrane: The surface of the insulation or substrate shall be inspected prior to installation of the Sarnafil roof membrane. The substrate shall be clean, dry, free from debris and smooth with no surface roughness or contamination. Broken, delaminated, wet or damaged insulation boards shall be removed and replaced.

1. Sarnacol 2170 or approved equal Adhesive:

a. Over the properly installed and prepared substrate surface, Sarnacol 2170 or approved equal adhesive shall be applied using solvent-resistant ¾ inch (19 mm) nap paint rollers;

b. The adhesive shall be applied to the substrate at a rate according to Sika Sarnafil requirements;

1) The adhesive shall be applied in smooth, even coating with no gaps, globs, puddles or similar inconsistencies;

2) Only an area which can be completely covered in the same day's operations shall be coated with adhesive;

3) The first layer of adhesive shall be allowed to dry completely prior to installing the membrane.

c. When the adhesive on the substrate is dry, the Sarnafil roof membrane is unrolled. Adjacent sheets shall be overlapped 3 inches (75 mm;

d. Once in place, one-half of the sheet's length shall be turned back and the underside shall be coated with Sarnacol 2170 or approved equal adhesive at a rate of ½ gallon per 100 ft²;

e. When the membrane adhesive has dried slightly to produce strings when touched with a dry finger, the coated membrane shall be rolled onto the previously coated substrate being careful to avoid wrinkles:

1) Adhesive on the underside of the Sarnafil membrane shall not be allowed to dry completely;

2) The bonded sheet shall be pressed firmly in place with a water-filled, foam-covered lawn roller by frequent rolling in two directions.

3) The remaining un-bonded half of the sheet shall be folded back and the procedure repeated.

4) No adhesive shall be applied in seam areas.

f. All membrane shall be applied in the same manner.

G. Hot-Air Welding Of Seam Overlaps: Welding equipment shall be provided by or approved by Sika

Sarnafil. All mechanics intending to use the equipment shall have successfully completed a training course provided by a Sika Sarnafil Technical Representative prior to welding.

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1. General: All seams shall be hot-air welded. Seam overlaps should be 3 inches (75 mm) wide when automatic machine-welding and 4 inches (100 mm) wide when hand-welding, except for certain details;

a. All membrane to be welded shall be clean and dry;

2. Hand-Welding: Hand-welded seams shall be completed in two stages. Hot-air welding equipment shall be allowed to warm up for at least one minute prior to welding;

a. The back edge of the seam shall be welded with a narrow but continuous weld to prevent loss of hot air during the final welding;

b. The nozzle shall be inserted into the seam at a 45-degree angle to the edge of the membrane;

c. Once the proper welding temperature has been reached and the membrane begins to "flow," the hand roller is positioned perpendicular to the nozzle and rolled lightly. For straight seams, the 1-1/2 inch (40 mm) wide nozzle is recommended for use;

d. For corners and compound connections, the 3/4 inch (20 mm) wide nozzle shall be used.

3. Machine Welding: Machine welded seams are achieved by the use of Sika Sarnafil's or approves equal automatic welding equipment. When using this equipment, Sika Sarnafil's or approves equal instructions shall be followed and local codes for electric supply, grounding and over current protection observed. Dedicated circuit house power or a dedicated portable generator is recommended.

a. No other equipment shall be operated simultaneously off the generator.

b. Metal tracks may be used over the deck membrane and under the machine welder to minimize or eliminate wrinkles.

H. Quality Control of Welded Seams:

1. The Applicator shall check all welded seams for continuity using a rounded screwdriver.

2. Visible evidence that welding is proceeding correctly is smoke during the welding operation, shiny membrane surfaces, and an uninterrupted flow of dark grey material from the underside of the top membrane;

3. On-site evaluation of welded seams shall be made daily by the Applicator at locations as directed by the Owner's Representative or Sika Sarnafil's representative or approved equal represenative.

One inch (25 mm) wide cross-section samples of welded seams shall be taken at least three times a day:

a. Correct welds display failure from shearing of the membrane prior to separation of the weld.

Each test cut shall be patched by the Applicator at no extra cost to the Owner.

I. Membrane Flashings:

1. General Criteria: Sika Sarnafil's or approved equalrequirements and recommendations and the specifications shall be followed. All material submittals shall have been accepted by Sika Sarnafil prior to installation. All flashings shall be installed concurrently with the roof membrane as the job progresses.

a. No temporary flashings shall be allowed without the prior written approval of the Owner's

Representative and Sika Sarnafil. Approval shall only be for specific locations on specific dates;

2. Sarnacol or approved equal Adhesive for Membrane Flashings;

3. All panels of membrane shall be applied in the same manner: adhesion to substrate and overlapping the edges of the panels as required by welding techniques.

4. Install membrane and flashing system accessories as required by the manufacturer. Install

Sarnastop / Sarnabar / Sarnacord or approved equal in strict compliance with the Detail Drawings with approved fasteners into the structural deck at the base of parapets, walls and curbs.

Sarnastop is required by Sika Sarnafil or approved equal at the base of all tapered edge strips and at transitions, peaks, and valleys according to Sika Sarnafil's or approved equal details;

5. All flashings shall extend a minimum of 8 inches (0.2 m) above roofing level unless otherwise accepted in writing by the Owner's Representative and Sika Sarnafil Technical Department;

6. All flashing membranes shall be consistently adhered to substrates. All interior and exterior corners and miters shall be cut and hot-air welded into place. No bitumen shall be in contact with the Sarnafil membrane;

7. All flashing membranes shall be mechanically fastened along the counter-flashed top edge with Sarnastop at 6-8 inches (0.15-0.20 m) on center;

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8. Sarnafil flashings shall be terminated according to Sika Sarnafil recommended details;

9. All perimeter membrane flashings shall extend down, on the exterior face, and terminate at the

45-degree drip edge of the metal hookstrip.

a. The interior hookstrip shall be installed after the installation of perimeter (parapet) membrane flashings.

J. Metal Flashings:

1. General Criteria: All flashings shall be installed concurrently with the roof membrane as the job progresses. No temporary flashings shall be allowed without the prior written approval of the Owner's Representative and Sika Sarnafil or approved equal manufacture,. Acceptance shall only be for specific locations on specific dates:

2. Metal details, fabrication practices and installation methods shall conform to the applicable requirements of the following:

a. Factory Mutual Loss Prevention Data Sheet 1-49 (latest issue);

b. Sheet Metal and Air Conditioning Contractors National Association, Inc. (SMACNA) -latest issue;

3. Complete all metal work in conjunction with roofing and flashings so that a watertight condition exists daily.

4. Metal shall be installed to provide adequate resistance to bending to allow for normal thermal expansion and contraction;

5. Metal joints shall be watertight;

a. Hook strips are to be fastened 12 inches (0.3 m) on center into the wood nailer.

b. Copings shall be fabricated with dimensions that match the existing dimensions.

6. Sarnaclad metal flashings (Through-wall Scupper) shall be formed and installed per the manufacture’s requirements;

a. Fasteners shall penetrate the substrate a minimum of 1 inch (25 mm);

b. Sheet Metal Coping:

1. Metal Coping shall be pre-formed to match existing face dimensions;

a. Engage coping on continuous hookstrip at the interior and exterior faces;

K. Temporary Cut-Off: All flashings shall be installed concurrently with the roof membrane in order to maintain a watertight condition as the work progresses;

1. All temporary waterstops shall be constructed to provide a 100% watertight seal;

a. The stagger of the insulation joints shall be made even by installing partial panels of insulation, as applicable;

2. When work resumes, the contaminated membrane shall be cut out;

a. All sealant, contaminated membrane, insulation fillers, etc. shall be removed from the work area and properly disposed of off-site. These materials shall not be used in the new work;

b. If inclement weather occurs while a temporary waterstop is in place, the Applicator shall provide the labor necessary to monitor the situation to maintain a watertight condition;

c. If any water is allowed to enter under the newly completed roofing, the affected area shall be removed and replaced at the Applicator's expense.

L. Close-Out:

1. Remove combustible rubbish materials and empty flammables cans each day and safely dispose of same in accordance with requirements of authorities having jurisdiction

2. Restore work areas, and surrounding areas effected by work, to pre-construction state.

3. Provide a three-year (3 year) Installer’s warranty;

4. Provide twenty (20) year manufacturer’s Systems Warranty:

a. Prior to demobilization from the site, the work shall be reviewed by the Owner's Representative and the Applicator. All defects noted and non-compliances with the Specifications or the recommendations of Sika Sarnafil or approved equal manufacture shall be itemized in a punch list. These items must be corrected immediately by the Applicator to the satisfaction of the Owner's Representative and Sika Sarnafil prior to demobilization. All Warranties referenced in this Specification shall have been submitted and have been accepted at time of contract award.

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END OF STATEMENT OF WORK

2.4 Supplemental Category of Work Requirements and Responsibilities

N/A

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3 Standard Terms and Conditions

3.1 Contract Initiation Requirements

Once all approvals have been obtained and the Contract is fully executed, the Procurement Officer may schedule a kickoff meeting to be held prior to commencement of Contract performance.

3.2 End of Contract Transition

The Contractor shall cooperate in the orderly transition of services from it to a subsequent contractor at the end of the contract term or upon receipt of a Notice of Termination from the State. Transition shall be provided in a prompt and timely manner and shall proceed in accordance with the schedule provided to the Contractor by the State in the Notice of Transition. Additional instructions regarding transition services may be provided in the event of a Notice of Termination issued by the State.

3.3 Invoicing

Submission of an invoice constitutes the Contractor’s verification that the information in the invoice is accurate as of the time of submission.

An invoice not satisfying the requirements of a Proper Invoice (as defined in COMAR 21.06.09) will not be processed for payment. To be considered a Proper Invoice, invoices must include the following information, without error:

A. Contractor name and address;

B. Remittance address;

C. Federal taxpayer identification (FEIN) number, social security number, as appropriate;

D. Invoice period (i.e. time period during which services covered by invoice were performed);

E. Invoice date;

F. Invoice number;

G. State assigned Contract number;

H. State assigned (Blanket) Purchase Order number(s);

I. Goods or services provided;

J. Amount due; and

K. Any additional documentation required by regulation or the Contract.

Invoices that contain both fixed price and labor hour or time and material items shall clearly identify each item as either fixed price, and labor hour, or time and material billing.

The State reserves the right to reduce or withhold Contract payment in the event the Contractor does not provide all required deliverables within the time frame specified in the Contract or otherwise breaches the terms and conditions of the Contract until such time as the Contractor brings itself into full compliance with the Contract.

The State is generally exempt from federal excise taxes, Maryland sales and use taxes, District of Columbia sales taxes and transportation taxes. The Contractor, however, is not exempt from such sales and use taxes and may be liable for the same.

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Invoices for final payment shall be clearly marked as “FINAL” and submitted when all work requirements have been completed and no further charges are to be incurred under the Contract. In no event shall any invoice be submitted later than 60 calendar days from the Contract termination date.

3.3.1 Invoice Submission Schedule

The Contractor shall submit invoices in accordance with the following schedule:

A. For items of work for which there is one-time pricing (see Attachment B –The Price Form), those items shall be billed in the month following the acceptance of the work by the…