EXHIBIT_B_–_Roof_Insulation.pdf

Alameda County 224 West Winton Roof Replacement

07 2216 - ROOF INSULATION

SECTION 07 2216

ROOF INSULATION

PART 1 GENERAL

1.01 SECTION INCLUDES

A. Roof insulation and installation.

1. HCFC FREE "Green" Polyiso Rigid board type roof insulation(s) for thermal protection as part of roofing assemblies.

1.02 RELATED SECTIONS

A. Section 07 41 13 – Metal Roof Panels

B. Section 07 55 50 - Modified Bitumen Roofing

C. Section 07 62 00 - Sheet Metal Flashing and Trim

1.03 REFERENCES

A. ASTM A-167-94a Specification for Stainless and Heat-Resisting Chromium Nickel Steel Plate, Sheet and Strip

B. ASTM A- 653 Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc - Iron Alloy-Coated (Galvanized) by the Hot-Dip Process

C. ASTM B-29 Pig Lead

D. ASTM B-32 Solder Metal

E. ASTM C-165-95 Test Method for Measuring Compressive Properties of Thermal Insulation

F. ASTM C-208-95 Specifications for Cellulosic Fiber Insulating Board

G. ASTM C-209-92 Test Method for Cellulosic Fiber Insulating Board

H. ASTM C-272-91 Test Method for Water Absorption of Core Materials for Structural Sandwich Constructions

I. ASTM C 518 - Standard Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus.

J. ASTM C-728-91 Specification for Perlite Thermal Insulation Board

K. ASTM D-5 Test Method for Penetration of Bituminous Materials

L. ASTM D-36 Test Method for Softening Point of Bitumen (Ring and Ball Apparatus)

M. ASTM D-92 Test Method for Flash and Fire Pints by Cleveland Open Cup

N. ASTM D-312 Specification for Asphalt Used in Roofing

O. ASTM D-5147 Sampling and Testing Modified Bituminous Sheet Material

P. ASTM E 84 - Standard Test Method for Surface Burning Characteristics of Building Materials.

Q. ASTM E 96 - Standard Test Methods for Water Vapor Transmission of Materials.

R. ASTM E 2114-01 - Standard Terminology for Sustainability Relative to the Performance of Buildings

S. ASTM 2129 -01 - Standard Practice for Data Collection for Sustainability Assessment of Building Product

T. FM Factory Mutual System, Norwood, Massachusetts

U. NRCA National Roofing Contractors Association, Chicago, IL

V. SMACNA Sheet Metal and Air Conditioning Contractors National Association

W. UL Underwriter's Laboratories, Inc., Northbrook, Illinois

X. FS HH-I-1972 Insulation Board, Polyisocyanurate

Y. WH Warnock Hersey International, Inc. Middleton, WI

1.04 DEFINITIONS

A. HCFC FREE "Green" Polyiso Roof Board Insulation is defined as environmentally friendly, with Zero Global Warming, Zero Ozone Depletion (ODP) as in compliance with the US EPA requirements of January 1, 2003 requirement to eliminate production of HCFC 141b.

B. LTTR (Long Term Thermal Resistance) is defined as using techniques from ASTM C1303, CAN/ULC S770 predicting a foam's R-Value that has been shown to be equivalent to the average performance of a permeably faced foam insulation product over 15 years. In Canada this method is used as the Design R-Value. This applies to ALL foam insulation products with blowing agents other than air, such as Polyiso, "Green" Polyiso, extruded polystyrene and polyurethane. The new method is based on consensus standards in the US and Canada. PIMA has reported this method as providing a better understanding of the thermal performance of foam.

1.05 SUBMITTALS

A. See Section 01 3300 - Submittals, for submittal procedures.

B. Product Data: Manufacturer's specifications and installation instructions for each product specified.

C. Provide approval letters from insulation manufacturer for use of their insulation within this particular roofing system type.

D. Provide a sample of each insulation type.

E. Shop Drawings: Provide manufacturers insulation design plans including tapered insulation and crickets.

F. Indicate complete installation details of tapered insulation system, including identification of each insulation block, sequence of installation, layout, drain locations, roof slopes, thicknesses, crickets and saddles.

G. Include: Outline of roof, location of drains and scuppers, complete board layout of tapered insulation components, thickness and the average "R" value for the completed insulation system.

H. Certifications: Submit all of the following;

1. Roof manufacturer's certification that insulation fasteners furnished are acceptable to roof manufacturer.

2. Roof manufacturer's certification that insulation furnished is acceptable to roofing manufacturer as a component of roofing system and is eligible for roof manufacturer's system warranty.

3. Wind uplift calculation, per CBC, Chapter 15, 1504 utilizing ASCE 7. Wind uplift shall be provided by the roofing system manufacturer. Calculation shall be signed and sealed by a CA licensed Structural II engineer.

4. System Manufacturer's or insulation manufacturer's certification that HCFC FREE "Green"

Polyiso materials meet Zero ODP (Ozone Depletion Potential) and Zero GWP (Global Warming Potential) specification requirements.

1.06 DESIGN REQUIREMENTS

A. No ponding of water on roof, all runoff flows to drain.

B. All roof insulation overlaid with Densdeck prime. No roofing installed over exposed insulation.

1.07 PERFORMANCE REQUIREMENTS

A. General: Fire Classification, ASTM E-108; Section specifies a roof system with an external fire rating.

The descriptions given below are general descriptions. The insulation, recovery board, and all other components shall be included as required by the membrane manufacturer to provide a Factory Mutual Class 1A fire resistance rating or Listed by Underwriter's Laboratories or Warnock Hersey for external fire tests of ASTM - E - 108 Class A.

B. Provide continuity of thermal barrier at building enclosure elements.

C. Flame spread less than 25 when tested in accordance with ASTM E84.

D. Smoke density less than 50 when tested in accordance with ASTM E84.

1.08 DELIVERY, STORAGE, AND HANDLING

A. Deliver materials in manufacturer's original, unopened packaging, with identifying tags or labels intact and legible.

B. Coordinate scheduling for timely deliveries and prompt installation of materials.

C. Store insulation and support system in a dry, protected area out of direct sunlight. If storage area is outdoors, store material off the ground and protected by a suitable waterproof cover.

D. Remove insulation which is warped, broken or exposed from moisture from the site.

1.09 ENVIRONMENTAL REQUIREMENTS

A. Handle and install insulation system only under conditions and temperatures recommended by the manufacturer.

B. Coordinate insulation placement to assure that material can be covered promptly with roof. Do not leave insulation exposed overnight or to inclement weather.

1.10 WARRANTY

A. Provide warranty coordinated with the requirements of other sections specifying roof products.

PART 2 PRODUCTS

2.01 MANUFACTURER

A. Acceptable Manufacturers:

1. Wise Product Group – Local Representative – Doug Clark; dclark@garlandco.com – (925) 784-

B. Substitutions: See Section 01 6000 - Product Requirements.

2.02 MATERIALS

A. Polyisocyanurate Roof Insulation: Provide thicknesses of insulation as indicated. Provide combination of types and thicknesses to provide a complete system. Provide taper design for approval by county as needed to ensure ¼” positive slope throughout.

1. Surface Burning Characteristics: Provide assembly with composite flame spread rating of 25 or less and smoke developed of 50 or less, as determined in accordance with ASTM E 84.

2. Closed cell polyisocyanurate foam.

mailto:dclark@garlandco.com

a. R-Value: Minimum 10.

3. Insulation board shall meet the following requirements:

a. UL, WH or FM listed under Roofing Systems

b. Federal Specification HH-I-1972, Class 1

c. Dimensional Stability ASTM D2126 2% max.

d. Compressive Strength ASTM D1621 25 psi min.

e. Vapor Permeability ASTM E-96 1 perm max.

f. Foam Core Density ASTM D1622 2.0 pcf min.

g. Water Absorption ASTM C209 <1 %

h. Flame Spread ASTM E 84, 25 max.

i. R-Factor HR per inch thickness ASTM C 518 (Design Value)

B. Related Materials:

1. Fiber Cant and Tapered Edge Strips: Performed rigid insulation units of sizes/shapes indicated or as required to achieve configurations shown, of perlite or organic fiberboard:

C. Protection Board: Densdeck Prime 1/2 inch thickness.

D. Adhesive: Insul-Lock HR – The Garland Company.

E. Sprayed in place backfill insulation: Dow Great Stuff or as approved by roofing system manufacturer.

F. Fasteners:

1. Corrosion resistant screw fastener as recommended by roof membrane manufacturer.

2. Factory Mutual Tested and Approved with 3 in. coated disc for 1-90 rating, length required to penetrate deck one inch.

PART 3 EXECUTION

3.01 EXAMINATION

A. Verify that roof framing system is complete and ready to receive insulation system. Do not proceed with installation until unsatisfactory conditions have been corrected.

1. Verify that work which penetrates roof deck has been completed.

2. Verify that wood nailers are properly and securely installed.

3. Examine surfaces for defects, rough spots, ridges, depressions, foreign material, moisture, and unevenness.

4. Do not proceed until defects are corrected.

5. Do not apply insulation until substrate is sufficiently dry, 12 percent moisture maximum, and ready to receive insulation and adhesive.

6. Broom clean substrate immediately prior to application.

7. Use additional insulation to fill depressions and low spots that would otherwise cause ponding water.

3.02 INSTALLATION

A. General: Install roof insulation in strict accordance with manufacturer's instructions and approved shop drawings.

B. Roofing insulation attachment with mechanical fasteners:

1. Approved insulation board shall be fully attached to the deck with an approved mechanical fastening system. Attachment shall be per roofing system manufacturer’s wind uplift calculation.

2. Place boards in a method to maximize contact bedding. Notch out undersides of insulation where insulation directly covers structural fasteners which are attached to the roof deck. Make notch equal to the length, width and depth of steel strap.

3. Filler pieces of insulation require at least two fasteners per piece if size of insulation is less than four square feet.

4. Provide spacing pattern of fasteners manufacturer's recommendations to meet wind uplift requirements. Placement of any fastener from edge of insulation board shall be a minimum of three inches, and a maximum of six inches.

5. Minimum penetration into deck shall be as recommended by the fastener manufacturer, and one inch (1") minimum for wood or metal decks where not specified by the manufacturer

6. Backfill around all conduit, junction boxes, etc. in roof insulation with spray foam insulation.

Shave solidified spray foam even with boar insulation surface.

7. Subsequent layers of insulation will be set in insulation adhesive. Stagger the joints of subsequent layers of polyisocyanurate and protection board over the initial layer.

8. Adhere cover board in foam insulation adhesive.

3.03 CLEANING AND PROTECTION

A. Remove debris and cartons from roof deck. Protect finished work to insure that insulation remains clean and dry, ready to receive roofing membrane.

END OF SECTION