Section 07220.pdf

SOL NO. AG-9702-S-09-0005

EROC-SW

Arcata Lab Buildout

Redwood Science Laboratory Renovation 07200 - 1

SECTION 07200

ROOF INSULATION

PART 1 - GENERAL

1.1 SUMMARY:

A. Section Includes: Rigid roof insulation and crickets.

B. Related Documents: The Conditions of the Contract and Division 1 apply to this section as fully as if repeated herein.

1.2 REFERENCES:

A. The editions of specifications and standards referenced herein, published by the following organizations, apply to the work only to the extent specified by the reference.

American Society for Testing and Materials (ASTM) General Services Administration Federal Specifications (Fed. Spec.)

1.3 SUBMITTAL:

A. Shop Drawings: Submit drawings for tapered insulation systems showing the layout and code marking of panels and indicating roof slopes, cants, crickets and roof drain locations.

B. Product Data: Submit certificates of conformance, certified test reports or other data indicating conformance of insulation with the applicable reference standards.

1.4 QUALITY ASSURANCE:

A. Manufacturer's Qualifications: Use only insulation materials acceptable to the built-up roofing system manufacturer.

B. Regulatory Requirements:

1. UL Listing: Provide insulation materials that have been listed by Underwriters Laboratories, Inc. (UL) as approved for use in construction of Class A roof coverings.

2. Provide insulation materials used over metal deck listed by Underwriters Laboratories or Factory Mutual as part of a roof deck construction that has been evaluated for spread of fire on the underside and for wind uplift of Class I-90.

C. Pre-Installation Conference: The roof insulation installer, as a part of the complete roofing system installation, shall participate in the Pre-Roofing Conference as specified in Section 07510.

D. Where insulation is a component of a guaranteed roofing system as specified in Section 07510, provide insulation as manufactured by the roofing system manufacturer, or approved by him for use in the guaranteed roofing system. Installer shall be the same installer as used for the roofing system and approved by the roofing materials manufacturer.

1.5 DELIVERY, STORAGE, AND HANDLING:

A. Delivery:

1. Deliver insulation and asphalt to the site in unopened containers labeled with the manufacturer's name and brand designation.

2. Package and code tapered insulation boards to match codes used on the shop drawings.

B. Storage:

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1. Do not store insulation in the building until masonry, plaster and concrete are dry and the building has reached the prevailing relative humidity of the locality.

2. Store insulation elevated off the ground in dry weather-tight enclosures or under weather-tight tarpaulins. Provide adequate ventilation to avoid condensation.

1.6 PROJECT CONDITIONS:

A. Do not apply insulation when the ambient temperature is below 40 degrees F or when conditions indicate that temperature may fall below 40 degrees F within 24 hours.

B. Do not apply insulation when there is surface moisture or visible dampness on the roof deck.

PART 2 - PRODUCTS

2.1 INSULATION:

A. Materials:

1. Cover board: ½” wood fiber board. ASTM C 728-97. Temple Inland or pre-approved equal.

2. Tapered edge strip and tapered insulation: polyisocyanurate. Sloped 1/4” per 12”. JohnsManville or approved equal.

3. Tapered crickets: expanded Perlite Board: ASTM C 728-97. Sloped ¼” per 12”. As approved by roofing system manufacturer.

2.2 OTHER MATERIALS:

A. Cants: Expanded perlite meeting the requirements of ASTM C 728-97.

B. Insulation adhesive: Insul-Lock by The Garland Co. or approved equal.

PART 3 - EXECUTION

3.1 EXAMINATION:

A. Examine deck substrates to ensure that the following conditions are met:

1. The deck is properly sloped to drain without hollows or low spots exceeding 1/4 inch in 10 feet.

2. Curbs and cants are in place and properly installed.

3. Nailers the same thickness as insulation have been provided at eaves, edges, curbs, walls, and roof openings for securing cant strips, gravel stops, gutters, and flashing flanges.

4. Steel deck panels are properly secured to structural members and to each other and surfaces of top flanges are flat or slightly convex.

5. Work that requires penetration of the deck has been completed.

B. Do not proceed with installation of insulation until such deficiencies have been corrected.

3.2 PREPARATION OF SURFACES:

A. Sweep deck surfaces to remove all loose particles and debris.

B. Protection:

1. Locate flame heated equipment so as not to endanger the structure, other materials on the site or adjacent property.

2. Do not place flame heated equipment on the roof of any structure.

3. Provide and maintain fire extinguishers near flame heated equipment.

4. Install protective coverings over paving and building walls adjacent to hoists and kettles before starting work.

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3.5 INSTALLATION OF INSULATION OVER WOOD DECKS.

A. First layer of approved insulation board shall be fully attached to the deck with an approved mechanical fastening system. Roofing system manufacturer’s engineering department shall determine fastener spacing per ASTM 1592.

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

C. Spacing pattern of fasteners shall be as per manufacturer’s recommendations to meet wind uplift calculation requirements. Placement of any fastener from edge of insulation board shall be a minimum of three inches, and a maximum of six (6) inches.

D. Minimum penetration into deck shall be as recommended by the fastener manufacturer. There is a one (1) inch minimum for wood.

E. Install crickets either by mechanically attaching them or in cold insulation adhesive.

END OF SECTION