7-Specifications 25-0061-3.pdf

SPECIFICATIONS FOR: BID NO. 26-0061-3

PURCHASE AND INSTALLATION OF THERMOPLASTIC POLYOLEFIN (TPO)

ROOFING MEMBRANE AT THE RECORDS CENTER BUILDING

SECTION I - GENERAL INFORMATION:

Chatham County is soliciting bids from qualified contractors to provide and install 60 mil Scrim

Reinforce Thermoplastic Polyolefin (TPO) Roofing Membrane at the Chatham County Records

Center, 4225 Augusta Rd Garden City 31408. The building is approximately 40,800 square feet.

It is the contractor’s responsibility to measure the square footage. The TPO membrane must be specifically designed to be suited for roof application i.e. flashing, inside and outside corners on curbs, parapets and scuppers. Pricing shall include labor, materials, tools and equipment necessary to accomplish the task. Bid award will be based on the lowest unit price.

Bid bond is required for this project. Bidders shall post a bid bond in the amount of 5% of the bid price. If awarded, contractor shall post payment/performance bond in the amount of 100% of the bid price. For more details, please see the Surety Form located under the

“Supporting Documents” section of this solicitation.

Direct any questions related to this ITB to Felix Espada Jr., and submit all questions through the County’s procurement portal

(https://chathamcountyga.bonfirehub.com/portal) Messages-Vendor Discussions. Bidders are not to contact any department directly.

SECTION II – SCOPE OF WORK

A. Contractor’s Responsibilities

1. Furnish all labor, supervision, materials equipment and services to complete roofing and roof details using the TPO roofing membrane system.

2. Removal and disposal of all materials/debris associated with new roof installation.

3. Install new white 0.60 mil single-ply TPO roofing membrane. Membrane is to be installed up to the existing parapet and curbs. Contractors shall follow the manufacturer’s installation requirements. Installation must be performed by a certified installer. Certification must be supplied with bid. Contractor must also supply with the bid the manufacturer’s product data sheets and Material Safety Data Sheets (MSDS) on each material proposed for usage.

B. Roofing System

1. Acceptable Manufacturers

a. GAF

b. Firestone

c. Mannville

2. Products furnished for roofing system shall be products of a single-ply TPO manufacturer.

https://chathamcountyga.bonfirehub.com/portal

3. Mechanically attached membrane roofing system.

a. Thermoplastic polyolefin sheet, 0.60-inch thickness, white in color.

b. Acceptable products

• GAF by GAF Building Product

• Firestone by Firestone Building Product

• John Mannville Building Product.

4. Examination of Surfaces - Contractor shall examine substrate, roof deck and related surfaces and verify that there are no conditions such as inadequate anchorage, foreign materials moisture ridges that could inhibit application of TPO membrane. Contractor will ensure the following requirements are met.

a. All applicable codes, ordinances and regulations are followed.

b. Factory mutual class 1-60 wind uplift resistance classification.

c. Underwriter Laboratories UL-580 Class 90 wind uplift resistance classification.

C. Special Conditions

1. Work site is the Chatham County building. Entry and egress will be controlled by

County staff. “At No Time” will the Contractor be allowed to grant entry to any person without consent of County staff representative.

2. Due to the nature of this project, work is to be performed from 8:00 a.m. to 5:00 p.m., Monday through Friday. If the need arises for work hours to be changed, prior approval must be given by the Project Manager, Anthony Stephens. Work must be scheduled with Owner in such a manner as to allow Owner operations to continue with minimum interruption. Owner will occupy premises during entire period of construction to conduct normal, daily operations. Contractor shall cooperate with Owner’s

Representative in all construction operations to minimize conflict and to facilitate

Owner usage.

3. Access to roof construction areas shall be by way of Contractor provided exterior access for construction personnel. Contractor will not have access to building interior except as pre-arranged with Chatham County staff representative.

4. Parking spaces at the work site are limited to the rear of building.

D. Reference Material

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

E. Quality Assurance

1. Application

a. All materials installed on the roof shall be of a type approved by the roofing manufacturer.

b. All work must be performed by a certified TPO roofing Contractor with a minimum of five (5) years’ experience in the installation of the specified products.

c. Minimum five (5) years’ experience in single-ply roofing with two (2) years’ experience with seaming system as bid.

d. Contractor responsible for schedule and coordination.

2. Regulatory requirements: Classified by Underwriter’s Laboratories, Inc. as a UL790 class A roof covering.

3. Schedule manufacturer’s technical representative to be on site during membrane installation and or seam welding.

4. Attach all roofing system materials (including roof insulation, roofing membrane, flashing and other materials) as required to resist all wind uplift, and wind lateral loading.

F. Flashing and Trim – Will include but limited to:

1. Roof penetration sleeves and hood and umbrella counter flashing.

2. Metal counter flashing

3. Scupper

4. Metal edge

5. Curb cap flashing

6. Miscellaneous accessories

7. Walkway

8. Drains

G. Sealants and Caulking

1. Sealant shall be applied to counter flashing, roofing related sheet metal, and additional sealant application as required to provide a complete watertight roofing system.

H. Material Handling and Storage

1. All materials shall be stored in a manner to provide for complete protection of materials from weather and damage. Proper storage of all materials is the sole responsibility of the

Contractor.

I. Project Conditions

1. Contractor shall examine existing building and existing roofing to determine existing physical conditions that effect removal of existing roofing and installation of new roofing.

2. Environmental Requirements – Contractor shall NOT remove existing roofing and flashing during inclement weather or when rain is predicted (20 percent or more possibility).

3. Protection

a. Contractor shall take precautions as required to apply emergency temporary edge seal in event of sudden storms or inclement weather conditions which would prevent the satisfactory installation of the roof system.

b. Contractor shall verify that separation membrane has been properly installed in accordance with requirement of membrane manufacturer for conformance with warranty requirements.

J. Safety and Clean-Up Requirements

1. Contractor shall not load structure with weight that will endanger structure.

2. All hazardous materials must be cleared from the job site daily. All construction supplies and tools must be secured or removed from the job site.

3. Contractor shall not disrupt existing utility services to existing building. If an interruption of mechanical or electrical services becomes necessary, it shall be only at such times and for lengths of time as approved by Owner. At no time shall electrical and/or mechanical interruption occur without prior approval of Owner.

4. Contractor shall maintain environmental control in existing building, especially temperature, humidity, and dust control.

K. Warranties

1. Contractor will provide Owner with a twenty (20) year written manufacturer’s warranty which shall warrant TPO roofing work to be free of leaks and defects in material and workmanship after final completion.

2. Manufacturer’s standard warranty for type of sealant and caulk specified.

3. Contractor will provide a one (1) year written warranty against leakage.

4. Contractor will provide a Five (5) year written labor warranty

L. Commencement and Completion

1. Work shall begin within ten (10) days after receipt of “notice to proceed”. Final deliverable is due within 40 calendar days after the ten (10) day period.