072213 roof and deck insulation.pdf

Bay Pines VA Healthcare System Eye Treatment Center and VA Project Number 516-326 and 516-334 Ambulatory Surgery Center Construction Documents-3 July 7, 2009

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SECTION 07 22 00

ROOF AND DECK INSULATION

PART 1 - GENERAL

1.1 DESCRIPTION

A. Installation of roof and deck insulation, and vapor retarder on new construction ready to receive roofing or waterproof membrane.

B. Repairs and alteration work to existing roof insulation.

1.2 RELATED WORK

A. Wood blocking and edge strips: Section 06 10 00, ROUGH CARPENTRY.

B. Perimeter, rigid, and batt or blanket insulation: Section 07 21 13, THERMAL INSULATION.

C. Sheet metal components: Section 07 60 00, FLASHING AND SHEET METAL.

1.3 QUALITY CONTROL

A. Supervision of work by persons that are knowledgeable and experienced in roofing. See submittals for documentation of supervisors qualification.

B. Unless specified otherwise, comply with the recommendations of the NRCA

"Roofing and Waterproofing Manual" applicable to insulation for storage, handling, and application.

1.4 SUBMITTALS

A. Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT

DATA, AND SAMPLES.

B. Manufacturer's Literature and Data:

1. Asphalt materials, each type

2. Roofing cement, each type

3. Roof insulation, each type

4. Fastening requirements

5. Insulation span data for flutes of metal decks

C. Samples:

1. Roof insulation, each type

2. Nails and fasteners, each type

D. Certificates:

1. Indicating type, thickness and thermal conductance of insulation.

(Average thickness for tapered insulation).

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2. Indicating materials and method of application of insulation system on metal decks meet the requirements of Factory Mutual Research

Corporation for Class 1 Insulated Steel Deck Roofs.

E. Laboratory Test Reports: Thermal values of insulation products.

F. Layout of tapered roof system showing units required.

G. Documentation of supervisors training and experience showing knowledge of roofing procedures.

H. LEED Submittal:

1. Product Data for Credit MR 4.1 and Credit MR 4.2: For products having recycled content, documentation indicating percentages by weight of postconsumer and preconsumer recycled content.

a. Include statement indicating costs for each product having recycled content.

2. Product Data for Credit EQ 4.1: For adhesives used with insulation system, including printed statement of VOC content

1.5 DELIVERY, STORAGE AND MARKING

A. Deliver materials to the site in original sealed packages or containers marked with the name and brand, or trademark of the manufacturer or seller.

B. Keep materials dry, and store in dry, weathertight facilities or under canvas tarps. Use of polyethylene or plastic tarps to cover materials is not permitted. Store above ground or deck level on wood pallets.

Cover ground under stored materials with plastic tarp.

1. Store rolled materials (felts, base sheets, paper) on end. Do not store materials on top of rolled material.

2. Store foam insulation away from areas where welding is being performed and where contact with open flames is possible.

C. Protect from damage from handling, weather and construction operations before, during, and after installation.

1.6 APPLICABLE PUBLICATIONS

A. The publications listed below form a part of this specification to the extent referenced. The publications are referenced in the text by the basic designation only.

B. Federal Specifications (Fed. Spec.):

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UU-B-790A...............Building Paper, Vegetable Fiber: (Kraft, Waterproofed, Water Repellent and Fire

Resistant)

C. American Society for Testing and Materials (ASTM):

C1289-06................Faced Rigid Cellular Polyisocynurate Thermal

Insulation Board

D41-05..................Asphalt Primer Used in Roofing, Dampproofing, and Waterproofing

D312-00(R2006)..........Asphalt Used in Roofing

D2178-04................Asphalt Glass Felt Used in Roofing and

Waterproofing

D2822-05................Asphalt Roof Cement

F1667-05................Driven Fasteners: Nails, Spikes, and Staples

D. Factory Mutual Global (FM):

1-28....................Winds Loads to Roof Systems and Roof Deck

Securement

P7825-04................Approval Guide

E. National Roofing Contractors Association (NRCA):

The NRCA Roofing and Waterproofing Manual - Fourth Edition.

F. Underwriters Laboratories, Inc. (UL):

Fire Resistance Directory (2003)

G. U.S. Department of Commerce (NBS):

PS 1-83.................Construction and Industrial Plywood

H. National Particleboard Association (NPA):

A208.1-93...............Mat-Formed Wood Particleboard

1.7 QUALITY ASSURANCE:

Roof insulation on combustible or steel decks shall have a flame spread rating not greater than 75 and a smoke developed rating not greater than 150, exclusive of covering, when tested in accordance with ASTM E

84. Insulation bearing the UL label and listed in the UL Building

Materials Directory as meeting the flame spread and smoke developed ratings will be accepted in-lieu-of copies of test reports. Compliance with flame spread and smoke developed ratings will not be required when insulation has been tested as part of a roof construction assembly of the type used for this project and the construction is listed as fire-classified in the UL Building Materials Directory or listed as Class I roof deck construction in the FM P7825. Insulation tested as part of a

07 22 00 - 4 roof construction assembly shall bear UL or FM labels attesting to the ratings specified herein.

PART 2 - PRODUCTS

2.1 ASPHALT MATERIALS

A. Primer: ASTM D41.

B. Asphalt: ASTM D312, Type III or IV for vapor retarders and insulation.

C. Glass (Felt): ASTM D2178, Type IV, heavy duty ply sheet.

D. Venting Asphalt Base Sheet: ASTM D3672, Type I or Type II.

E. Roof Cement: ASTM D2822, Type I or Type II, asbestos free; or, D4586, Type I or Type II.

2.2 INSULATION

A. Isocyanurate Board: ASTM C1289, Type I, Class 2 or Type III.

G. Tapered Roof Insulation System Segments:

1. Fabricate of isocyanurate. Use only one insulation material for tapered sections.

2. Cut to provide high and low points with crickets and slopes as shown.

3. Minimum thickness of tapered sections; 13 mm (1/2 inch), unless manufacturers allow taper to zero mm (inch).

4. Slope: Not less than 6mm (1/4 inch)per foot, 12mm (1/2 inch) per foot at crickets and back slopes.

2.3 MISCELLANEOUS

A. Building Paper (Sheathing Paper):

1. Fed. Spec. UU-B-790, Type I, Barrier paper, Grade D, Water - Vapor permeable, Style 1a, Uncreped, not reinforced; or, Style 1b, Uncreped, not reinforced, red rosin sized.

2. Weighing approximately 3 kg/10 m2 (six pounds per 100 square feet).

B. Tapered Edge Strips:

1. Tapered 1:12 (one inch per foot), from 0 mm (0 inches), 300 mm to

450 mm (12 inches to 18 inches) wide.

2. Mineral Fiberboard: ASTM C726.

3. Perlite Board: ASTM C728.

2.4 FASTENERS

A. Fasteners for securing insulation to steel decks:

1. Conform to requirements of Factory Mutual Research Corporation for wind uplift.

2. Self-drilling galvanized screws with 50 mm (two inch) diameter disk.

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3. Antibackout thread design.

4. Have a pullout resistance of 14 kg (30 pounds) minimum.

2.5 RECOVERED MATERIALS

A. Comply with following minimum content standards for recovered materials:

Material Type Percent by Weight

Plastic rigid foams: Polyisocyanurate/polyurethane

Rigid foam 9 percent recovered material

B. The minimum-content standards are based on the weight (not the volume) of the material in the insulating core only.

PART 3 - EXECUTION

3.1 GENERAL

A. Do not apply roof insulation if deck will be used for subsequent work platform, storage of materials, or staging or scaffolding will be erected thereon.

B. Entire roof deck construction of any section of the building shall be completed before insulation system work is begun. Curbs, blocking, edge strips, and other components which insulation, roofing and base flashing is attached to shall be in place ready to receive insulation and roofing. Coordinate roof insulation operations with roofing and sheet metal work so that insulation is installed to permit continuous roofing operations.

C. Insulation system materials shall be dry and damage free when applied.

Do not use broken insulation or insulation with damaged facings. Remove damaged insulation from the site immediately.

D. Dry out surfaces, including the flutes of metal deck, that become wet from any cause during progress of the work before roofing work is resumed. Apply materials only to dry substrates.

E. Except for temporary protection specified, do not apply materials during damp or rainy weather, during excessive wind conditions, nor while moisture (dew, fog, snow, ice) or frost is present in any amount in or on the materials when temperature is below 10 °C (50 °F). Do not apply materials to substrate having temperature of 10 °C (50 °F) or less.

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F. Phased construction is not permitted. The complete installation of all flashing, insulation, and roofing shall be completed in the same day except for the area where temporary protection is required when work is stopped.

G. Heating Bitumen:

1. Heat the asphalt to the equiviscous temperature plus or minus 14 °C

(25 °F), at the time of application.

a. Asphalt shall not be heated more than 38 °C (100 °F) above the equiviscous temperature.

b. When the equiviscous temperature is not furnished by the asphalt manufacturer, asphalt shall not be heated above 274 °C (525 °F) for Type III and IV and shall be not less than 246 °C (475 °F) at time of application.

2. At no time shall bitumen be heated above the flash point temperature.

3. Provide heating kettles with a thermometer kept in operating condition. Kettlemen shall be in attendance at all times during heating to insure that the bitumens are heated within the temperatures specified.

H. Use Type III or Type IV asphalt between plies of felt and for installing insulation and vapor retarders.

I. Application of Materials with Hot Bitumen:

1. Apply bitumen in quantities required, immediately followed by materials to be embedded therein, before bitumen cools below the application temperature limit.

a. Do not apply more material than can be covered at one time, except for glaze coats.

b. Recoat cooled bitumen areas.

J. Primer: Use four liters (one gallon) of primer per 10 m2 (100 square feet).

K. Quantities of Asphalt:

1. Per square unless otherwise specified.

2. Between insulation layers and deck or vapor retarder: 9 to 14 kg (20 to 30 pounds).

3.2 SURFACE PREPARATION

A. Sweep decks to broom clean condition. Remove all dust, dirt or debris.

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B. Remove projections that might damage materials.

C. Concrete Decks, Except Insulating Concrete:

1. Test concrete decks for moisture prior to application of materials.

Heat bitumen as specified and pour approximately 0.5 liters (one pint) of bitumen on surface to which roofing materials are to be applied. If bitumen foams upon contact with the deck or after bitumen has cooled and bitumen is stripped clean from deck leaving no residue, the deck is not dry enough for application of prime coat and subsequent work.

2. Prime concrete decks, including precast unit, with primer and allow to dry before application of bitumen. Keep primer back 100 mm (four inches) from joints in precast unit.

3.3 VAPOR RETARDER

A. General:

1. // Install a continuous vapor retarder on roof decks as specified.

// Install a vapor retarder when phenolic insulation is used.

2. At vertical surfaces, turn up vapor retarder to top of insulation or base flashing.

3. At all pipes, walls, and similar penetrations through vapor retarder, seal openings with roof cement to prevent moisture entry from below.

4. Mop felts solidly in place as specified.

5. Seal penetrations with roof cement.

B. Cast in Place Concrete Decks, Except Insulating Concrete:

1. Prime deck as specified.

2. Apply two plies of asphalt saturated felt mopped down to deck.

C. Steel Deck:

1. Material and method of application of roofing systems used on metal decks shall meet the requirements of Underwriters Laboratories for

Class A or Factory Mutual Research Corporation for Class I Insulated

Steel Roof Deck.

2. Mechanically anchor a 25 mm (one inch) thick layer of mineral fiber board, cellular glass, or perlite board to meet the requirements of

Factory Mutual Research Corporation for Class // 1-60 // 1-90 //

Insulated Steel Deck Roofs.

3. Locate the long dimension edge joints to have solid bearing on top of decking ribs; do not cantilever over rib openings or flutes.

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4. Apply two plies of asphalt saturated felt in hot bitumen to insulation board.

3.4 SELECTION OF RIGID INSULATION

A. Insulation Type:

1. Use, isocyanurate board.

2. Use not less than two layers of insulation unless specified otherwise.

3. Use either 16 mm (5/8 inch) thick glass matt faced, primed gpsum board as first layer over steel decks. Do not use isocyanurate, board type insulation directly on steel roof decks.

4. Where tapered insulation is used, all insulation shall be factory tapered.

B. Insulation Thickness:

1. Thickness of roof insulation shown on drawings is nominal. Actual thickness shall provide the thermal resistance "R" value of not less than 19 for uniform thickness. (average thickness where tapered insulation is used).

2. The minimum thickness of insulation for metal decks shall not be less than recommended by the insulation manufacturer to span the rib opening (flute size) of the metal deck used.

3. When thickness of insulation to be used is more or less than that shown on the drawings, make adjustments in the alignment and location of roof drains, flashing, gravel stops, fascias and similar items at no additional cost to the Government.

4. Where tapered insulation is used, the thickness of the insulation at high points and roof edges shall be as shown on the drawings; the thickness at the low point (drains) shall be not less than 38 mm

(1-1/2 inches).

5. Use not less than two layers of insulation when insulation is 25 mm

(one inch) or more in thickness unless specified otherwise.

3.5 INSTALLATION OF INSULATION

A. Lay insulating units with close joints, in regular courses and with cross joints broken. When laid in more than one layer, break joints of succeeding layers of roof insulation with those in preceding layer. Bed insulation layers in Type III or IV asphalt firmly pressed into the hot bitumen. Keep bitumen below surface of insulation to receive single ply rubber roofing.

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B. Lay units with long dimension perpendicular to the rolled

(longitudinal) direction of the roofing felt.

C. Cover all insulation installed on the same day by either:

1. The roofing membrane as specified.

2. Temporary protection as specified.

D. Seal all cut edges at penetrations and at edges against blocking with bitumen or roof cement.

E. Cut to fit tight against blocking or penetrations.

F. Over Vapor Retarder, or Concrete Deck: Lay insulation in hot bitumen as specified.

G. Steel Deck:

1. Material and method of application of insulation systems used on metal decks shall meet the requirements of Underwriters laboratories for Class A or Factory Mutual Research Corporation for Class I

Insulated Steel Roof Deck.

2. Mechanically anchor first layer of insulation to steel deck to conform to FM Class // 1-60 // 1-90 //, Insulated Steel Roof Deck.

3. Locate the long dimension edge joints to have solid bearing on top of deck ribs; do not cantilever over deck rib openings or flutes.

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