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

1996 West Oregon Street Lapeer, Michigan 48446

APPLICATION OF ROOF COATING SYSTEM

Public Notice

NOTICE OF NEED FOR SERVICES – APPLICATION OF ROOF COATING SYSTEM

The Lapeer County ISD Board of Education is soliciting sealed bids for the application of a polyurethane and silicone roof coating system for a 35,000 square foot roof.

For bid specifications or questions, contact Jeff Hurley at (810) 664-1124 or jhurley@lapeerisd.org.

Bids will be accepted until 2:00 PM (EST) on Wednesday, November 14, 2018 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 12, 2018 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 June 30, 2019.

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

These bid specifications outline the requisite materials, methods, and conditions necessary for the proper application of a polyurethane and silicone roof coating system for a 35,000 square foot roof over an existing TPO membrane roofing system.

Actual application requirements may vary.

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. Coatings and Related Materials

All materials used shall be manufactured by and/or approved by the manufacturer and shall meet the following specifications.

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

C1363

0.16 – 0.18 BTU per ft2/hr.

Degree F per inch

HIGH SOLIDS SILICONE 412-Top Layer Type: UV resistant elastomeric Elongation: >192% at 73°F Tensile strength: 331 psi at 73°F Volume solids: 96% ± 2% Color: White

AROMATIC URETHANE 520-Base Layer Type: Single component moisture cure urethane Viscosity: 2,000 cps Elongation: 350% ± 50% Tensile strength: 975 ± 25 psi Volume solids: 70% ± 2% Color: Silver

URETHANE BRUSH-GRADE 522-Seam and Flashing Compound Type: Single component urethane flashing material Viscosity: 30,000-40,000 cps Elongation: 350% ± 50% Tensile strength: 975 ± 25 psi Volume solids: 69% ± 2% Color: Silver

3. Surface Preparation

TPO MEMBRANE

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.

4. Polyurethane Foam Application

Apply 2-part, 3 lb. density built up polyurethane around all penetrations, low lying areas, and critical areas that may need additional strength.

Polyurethane will be built to approximately 1” depth. Polyurethane strengthens flashings, seals and insulates immediate area.

5. Seam Flashing Treatment

a. Apply a layer of URETHANE BRUSH-GRADE 522 into each seam. (Min 30mils DFT)

b. Application shall be a minimum of 3” wide over the seam and feathered on to the existing roof membrane

c. Heat welded seams do not require additional reinforcement.

6. Application Rates

a. BASE COAT

i. Apply base coat of aromatic urethane 520 roof coating at a rate of 1 gallon per 100 square feet.

ii. 520 will be hand applied by brush and roller over entire TPO surface, over all flash-ings and previously applied polyurethane.

b. TOP COAT

i. Apply a top coat of high solids silicone 412 roof coating at a rate of 1 gallon per 100 square feet.

ii. 412 will be hand applied by brush and roller over entire TPO surface, over all flashings and previously applied 520 urethane.

iii. Each coat must be allowed to dry for 24-48 hours depending on humidity and temperature. The roof is to be inspected for defects, flaws or holidays and repaired if necessary.

iv. Each contactor should estimate coating requirements based on actual experience and needs to figure in losses due to applicator experience, surface texture, wind, waste, and other factors that can affect actual gallons required.

v. It is the applicator’s responsibility to verify wet and dry mil thickness during the appli-cation process to ensure proper dry mil thickness of the total roofing system.