01. Public Notice and Bid Specifications (Final).pdf

APPLICATION OF ROOF COATING SYSTEM

Public Notice

NOTICE OF NEED FOR SERVICES – POLYURETHANE ROOF, METAL STANDING SEAM ROOF SUBSTRATE

The Lapeer County ISD Board of Education is soliciting sealed bids for the application of a polyurethane roof, metal standing seam roof substrate.

For bid specifications or questions, contact Jeff Hurley at (810) 667-6156 or jhurley@lapeerisd.org.

Bids will be accepted until 2:00 PM (EST) on Wednesday, November 11, 2020 at which time they will be publicly opened at the Administration Building, 1996 W. Oregon St., Lapeer, MI 48446. No oral bids or bids submitted via telephone, e-mail, telegraph, or facsimile will be accepted.

A mandatory pre-bid meeting will be held on Monday, November 9, 2020 at 9:00 AM (EST) at the Education and Technology Center, 690 N. Lake Pleasant Rd., Attica, MI 48412.

Bids should be signed by an official authorized to bind the Bidder to its provisions and submitted in a sealed envelope clearly marked “Bids for Application of Roof Coating System” to the following:

Lapeer County ISD Administration Building 1996 W. Oregon St.

Lapeer, MI 48446 Attention: Ann M. Schwieman

Bids must be guaranteed for 90 days from the date of the bid opening and include shipping/handling costs.

Bids that exceed $50,000 must include a certified check or bid bond payable to the Lapeer County ISD in an amount equivalent to 5% of the base bid.

Project must be completed no later than May 31, 2021.

The Lapeer County ISD Board of Education reserves the right, at its discretion, to accept or reject any or all bids, or portions thereof; to waive omissions, irregularities, or clerical errors not affecting compliance with the bid specifications; and to add or delete items and adjust quantities, if applicable.

The Lapeer County ISD is a tax-exempt organization and is not subject to State or Federal taxes.

The successful Bidder(s) will be required to certify that it is not an Iran linked business.

Bid Specifications

The intention of this guideline is to outline the procedures for the application of Spray Polyurethane Foam (SPF) and reflective roof coating system over an existing metal standing seam roofing system. These suggested guidelines describe materials, methods, and conditions necessary for the proper application of the roof coating system, Actual application requirements may vary and are the responsibility of the contractor.

These bid specifications may not outline all procedures for preparation and finishing of penetrations, drains, flashings, etc; however, bids should include all work necessary for proper application in accordance with good trade practices.

Comparable alternatives will be accepted and considered; however, the Lapeer County ISD Board of Education will be the sole judge of comparability.

1. Approved Applicator

All products shall be applied by a single, experienced, and competent contractor or applicator approved by the product manufacturer with a minimum of 5 years experience working with such systems.

2. Closed Cell Polyurethane Foam

The polyurethane foam to be applied shall be a two-component system made by combining an isocyanate (A) component with a polyol (B) component and shall possess the following physical characteristics:

1996 West Oregon Street Lapeer, Michigan 48446

Lapeer County Intermediate School District mailto:jhurley@lapeerisd.org

CLOSED CELL POLYURETHANE FOAM

PROPERTIES ASTM TEST VALUE UNITS

Density D1622 2.8 – 3.0 lbs./ft3

Compressive Strength D1621 40 psi, minimum lbs./in2 Open Cell Content D2856 90%, minimum % value K-Value C177, C518, C1363

0.16 – 0.18 BTU per ft2/hr.

Degree F per inch

a. Polyurethane Foam, along with elastomeric coating and /or other components as an assembly shall meet the requirements of UL 790 for

Class A application and /or meet the requirements of a Factory Mutual RoofNAV for Class 1 application, and/or as required by local building codes.

b. Fire Safety Requirements: See CPI Bulletin AX-230, “Fire Safety Guidelines for Use of Rigid Polyurethane and Polyisocyanate Foam

Insulation in Building Construction.”

3. Coatings and Related Materials

All materials used shall meet the following specifications:

AWS Acrylic Polymer 211 Type: UV resistant elastomeric Elongation: >233% at 20%

Tensile strength: 273 ± 20 psi ASTM D2370 Volume solids: 65.4 + 2% Color: White

4. Surface Preparation

Metal Standing Seam (Retrofit)

a. Substrate must be pressure-washed. A minimum working pressure of 4,000 psi with a volume of 4 gallons per minute shall be used to remove all dirt, dust, previous paints and coatings which are delaminating as well as waste products (oil, oil based roof cements, solvents, grease, animal fats, etc). Use industrial detergent if necessary to remove all contaminates. Contact American WeatherStar for additional information.

b. Prime substrate all rusted metal must be primed with a rust inhibitive primer prior to polyurethane application.

5. Polyurethane Foam Application

a. The spray polyurethane foam shall be applied in accordance with the manufacturer’s specification and instructions.

b. Areas to be built-up to remove ponding water are to be filled in with spray polyurethane foam before the specified thickness of polyurethane foam is applied to the entire roof surface.

c. The spray polyurethane foam must be applied in a minimal pass thickness of ½ inch.

d. Spray polyurethane foam thickness shall be a minimum of one inch. The polyurethane foam shall be applied uniformly over the entire surface with a tolerance of plus ¼” per inch of thickness minus 0”, except where variations are required to insure proper drainage or to complete a feathered edge. Also, foam thickness specifications re based on individual substrates waterproofed.

e. The spray polyurethane foam shall be uniformly terminated a minimum of eight (8) inches above the roofline at all penetrations (except drains, parapet walls, or building junctions). Foamed in place cants shall be smooth and uniform to allow positive drainage.

6. Roof Coating

a. Apply AWS 211 protective insulating layer to entire roof surface including vents/ducts at an average coverage rate of 100 sf/gal. Initial coat will lower substrate surface temperature and improve the cure rate and quality of the finished appearance.

b. Apply AWS 211 finish layer to entire roof surface and roof vents/ducts at an approximate coverage rate of 100 sf/gal.