April 5, 2017 Addendum No. 2 MS Tank #1 – Steel Shell Replacement Project RFB 8224

Attachment 1

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SECTION 07 21 10

FOAMED-IN-PLACE INSULATATION

PART 1 -- GENERAL

GENERAL REQUIREMENTS

A. SCOPE:

1. Furnish labor, materials, tools, equipment, and services for Sprayed Polyurethane Foam Insulation (SPF) covered with a waterproof protective coating as indicated, in accordance with provisions of Contract Documents.

REFERENCES

A. REFERENCED STANDARDS: The publications referred to hereinafter form a part of this specification to the extent referenced. The publications are referred to in the text by the basic designation only. The latest edition of referenced publications in effect at the time of the bid shall govern. In case of conflict between the requirements of this section and the listed references, the requirements of this section shall prevail.

Reference Title

ASTM INTERNATIONAL

ASTM C518 Test Method for Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus

ASTM C1029 Standard Specification for Spray-Applied Rigid Cellular Polyurethane Thermal Insulation

ASTM C1338 Test Method for Determining Fungi Resistance of Insulation Materials and Facings

ASTM D1662 Test Method for Apparent Density of Rigid Cellular Plastics

ASTM D1623 Test Method for Tensile and Tensile Adhesion Properties of Rigid Cellular Plastics

ASTM D2126 Test Method for Response of Rigid Cellular Plastics to Thermal and Humid Aging

ASTM D2856 Test Method for Open-Cell Content of Rigid Cellular Plastics by the Air Pycnometer

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Reference Title

ASTM E84 Test Method for Surface Burning Characteristics of Building Materials

ASTM E90 Test Method for Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions and Elements

ASTM E96 Test Method for Water Vapor Transmission of Materials

ASTM E119 Standard Test Methods for Fire Tests of Building Construction and Materials

ASTM E283 Test Method for Determining the Rate of Air Leakage Through Exterior Windows, Curtain Walls, and Doors Under Specified Differences Across the Specimen

CALIFORNIA CODE OF FEDERAL REGULATIONS (CCR)

Title 24, Part 2 California Building Code

B. DEFINITIONS: (Not Used)

SUBMITTALS

A. The following information shall be submitted for review in accordance with Section 01300:

1. A copy of this specification section, with addenda updates, with each paragraph check marked to show specification compliance or marked to show deviations.

2. PRODUCT DATA: Manufacturers’ product data sheets, details and installation instructions including components and accessories, indicating product used to be in compliance with specifications.

3. PROJECT INFORMATION: Manufacturer of listed products.

OPERATION AND MAINTENANCE INSTRUCTIONS (NOT USED)

QUALITY ASSURANCE

A. Manufacturer:

1. Company specializing in manufacture of foamed-in-place insulation for a period not less than three (3) years.

B. Applicator:

1. Certified to apply materials by material manufacturer.

C. Final assembly must meet building code requirements.

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PART 2 -- PRODUCTS

SPRAY URETHANE FOAM

A. Spray polyurethane foam shall be standard product of the manufacturer, and containers shall be factory marked with the manufacturer's name or trademark. The foam material shall be of a formulation suitable for the environmental and climatic conditions in which foam will be applied. Polyurethane foam shall meet the following requirements:

1.

Properties in Inch-Pound Units

Properties ASTM Test Value Units

Density (Sprayed in Place)

ASTM D1622 ≥ 2.5 pcf

K-Factor (aged) ASTM C177

ASTM C518

≤ 0.16 BTU/hr·ft·°F

Compressive Strength

ASTM D1621 50-60 psi

Shear Strength ASTM C273 ≥ 40 psi

Tensile Strength ASTM D1623 ≥ 60 psi

Water Vapor Permeability

ASTM E96 ≤ 2.0 perms

Water Absorption ASTM D-2842 ≤ 0.017

Closed Cell Content

ASTM D6226 ≥ 90 Percent by volume

Flammability ASTM E84 ≤ 75 FSI

B. Acceptable Products: General Coatings Ultra-Thane 230; BASF FE 384 3.0 Series; BASF Elastospray 81305 Series; or equal.

PROTECTIVE COATING

A. Protective coating shall be as approved by the foam manufacturer for use as the coating component of a sprayed polyurethane foam system. The coating shall be a two-part highly viscose flexible epoxy roof coating. Cured coating must be UV stable with the

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ability to withstand thermal shock. Coating shall have a minimum bond to urethane foam of 500 psi.

B. The following materials are not acceptable as coatings: single component or catalyzed polyurethane elastomers, EVA, PVA, terpolymers acrylics, silicones, silicone rubbers, polyureas, butyl rubbers and neoprenes.

C. Acceptable Products: Novasol Inc., Nova Tuff RC-105; or equal.

PART 3 -- EXECUTION

GENERAL

A. Comply with manufacturer's written instructions applicable to products and applications indicated.

INSTALLATION

A. PREPARATION:

1. Verify acceptability of substrate.

2. If required, clean or treat substrate for adhesion.

B. INSTALLATION:

1. Extend insulation to envelop entire area to be insulated.

Fill tightly around obstructions and voids.

Remove projections that interfere with placement.

2. Fill all miscellaneous voids completely to eliminate dead air spaces.

C. THERMAL COATING:

1. BONDING AGENT:

Use where required to attain specified bond properties.

Product as recommended by maker of thermal coating.

2. Apply Thermal Coating with manufacturer approved spray equipment

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3. Apply Thermal Barrier minimum ¾-inch or as required to provide minimum 15-minute fire protection with maximum interface temperature of 250 degrees Fahrenheit.

4. Completely cover exposed SPF insulation. Thermal coating is not required at portions of sprayed polyurethane foam which is covered with minimum ½-inch thick fire-rated gypsum wallboard or CMU.

5. Trowel Thermal Barrier to a smooth surface where vapor retarder paint is used.

D. CLEANING:

1. Remove masking and overspray from installed materials not scheduled for application.

2. Clean floor surfaces of set material resulting from trimming.

3. Remove from the project site all refuse, cartons and other waste resultant from work

4. Protect installed materials from damage due to harmful weather exposures, physical abuse, and other causes.

5. Repair damaged areas.

TESTING

A. Perform one thickness test per 100 square feet.

TRAINING (NOT USED)

**END OF SECTION**