072200 - Roof and Deck Insulation.pdf

10-18-2020

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SECTION 07 22 00

ROOF AND DECK INSULATION

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

B. Roof and deck insulation, cover board on concrete deck ready to receive roofing or waterproofing membrane.

C. Demo work to existing roof insulation.

1.2 RELATED REQUIREMENTS

A. Wood Cants, Blocking, and Edge Strips: Section 06 10 00, ROUGH

CARPENTRY.

1.3 APPLICABLE PUBLICATIONS

A. Comply with references to extent specified in this section.

B. American Society of Heating, Refrigeration and Air Conditioning

(ASHRAE):

1. Standard 90.1-13 - Energy Standard for Buildings Except Low-Rise

Residential Buildings.

C. ASTM International (ASTM):

1. C1177/C1177M-13 - Glass Mat Gypsum Substrate for Use as Sheathing.

2. C1278/C1278M-07a(2015) - Fiber-Reinforced Gypsum Panel.

3. C1289-15 - Faced Rigid Cellular Polyisocyanurate Thermal Insulation

Board.

4. C1396/C1396M-14a - Gypsum Board.

5. D41/D41M-11 - Asphalt Primer Used in Roofing, Dampproofing, and

Waterproofing.

6. D312-06 - Asphalt Used in Roofing.

7. D1970/D1970M-15 - Self-Adhering Polymer Modified Bituminous Sheet

Materials Used as Steep Roofing Underlayment for Ice Dam Protection.

8. D2178/D2178M-15 - Asphalt Glass Felt Used in Roofing and

Waterproofing.

9. D2822/D2822M-11 - Asphalt Roof Cement, Asbestos Containing.

10. D4586/D4586M-07(2012)e1 - Asphalt Roof Cement, Asbestos-Free.

11. E84-15a - Surface Burning Characteristics of Building Materials.

12. F1667-15 - Driven Fasteners: Nails, Spikes, and Staples.

D. National Roofing Contractors Association (NRCA):

1. Manual-15 - The NRCA Roofing Manual: Membrane Roof Systems.

E. UL LLC (UL):

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1. Listed - Online Certifications Directory.

F. U.S. Department of Commerce National Institute of Standards and

Technology (NIST):

1. DOC PS 1-09 - Structural Plywood.

2. DOC PS 2-04 - Performance Standard for Wood-Based Structural-Use

Panels.

1.4 SUBMITTALS

A. Submittal Procedures: Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES.

B. Submittal Drawings:

1. Show size, configuration, and installation details.

a. Nailers, cants, and terminations.

b. Layout of insulation showing slopes, tapers, penetrations, and edge conditions.

C. Manufacturer's Literature and Data:

1. Product Data: submit manufacturer’s product data sheets, providing descriptive data, dimensions, LTTR values, and other pertinent criteria for each material proposed for use in construction of roof assembly

D. Samples:

1. Roof insulation, each type.

2. Fasteners, each type.

E. Sustainable Construction Submittals:

1. Recycled Content: Identify post-consumer and pre-consumer recycled content percentage by weight.

2. Biobased Content:

a. Show type and quantity for each product.

3. Low Pollutant-Emitting Materials:

a. Show volatile organic compound types and quantities.

b. Certify each // composite wood // and agrifiber // product contain no added urea formaldehyde.

F. Qualifications: Substantiate qualifications meet specifications.

1. Installer.

1.5 QUALITY ASSURANCE

A. Installer Qualifications: Same installer as Division 07 roofing section installer.

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1.6 DELIVERY

A. Comply with recommendations of NRCA Manual.

B. Deliver products in manufacturer's original sealed packaging.

C. Mark packaging, legibly. Indicate manufacturer's name or brand, type, and manufacture date.

D. Before installation, return or dispose of products within distorted, damaged, or opened packaging.

1.7 STORAGE AND HANDLING

A. Comply with recommendations of NRCA Manual.

B. Protect products from damage during handling and construction operations.

C. Outdoor Storage:

1. Tarp and shield insulation from moisture and exposure to sun.

2. Elevate insulation above substrate 4-inches minimum.

3. Secure insulation to resist winds.

4. Do not use insulation which has been determined “wet” or which has been wet and has dried.

5. Distribute insulation stored on roof deck to prevent concentrated loads that would impose excessive stress or strain on deck and structural members or impede drainage.

1.8 FIELD CONDITIONS

A. Environment:

1. Install products when existing and forecasted weather permit installation according to manufacturer's instructions.

2. Apply roofing and insulation in dry weather.

3. Do not proceed with roof construction during inclement weather or when precipitation is predicted with 30 percent or higher probability.

4. Do not apply insulation over wet or moist deck or in foggy conditions.

5. Wind speeds in excess of 30 mph shall constitute “Inclement

Weather”.

B. Maintain on-site equipment and material necessary to apply emergency temporary weather protection to incomplete work in event of sudden or unexpected precipitation.

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1.9 WARRANTY

A. Construction Warranty: FAR clause 52.246-21, "Warranty of

Construction."

PART 2 - PRODUCTS

2.1 SYSTEM PERFORMANCE

A. Insulation Thermal Performance:

1. Overall Average R-Value: RSI-57 (R-25), minimum.

B. Fire and Wind Uplift Resistance: Provide roof insulation complying with requirements specified in Division 07 roofing section.

2.2 PRODUCTS - GENERAL

A. Provide each product from one manufacturer.

B. Sustainable Construction Requirements:

1. Bio-Based Materials: Where applicable, provide products designated by USDA and meeting or exceeding USDA recommendations for bio-based content, and products meeting Rapidly Renewable Materials and certified sustainable wood content definitions; refer to www.biopreferred.gov.

2.3 ADHESIVES

A. Bead-Applied Urethane Insulation Adhesive: two-component, VOC compliant, insulation adhesive.

1. Techanical Data:

a. Tensile Strength (ASTM 412) 250 psi

b. Viscosity (ASTM D 2556) 22,000-60,000 cp

c. Peel Strength (ASTM D 903) 17lb/in

2.4 ROOF AND DECK INSULATION

A. Roof and Deck Insulation, General: Preformed roof insulation boards approved by roofing manufacturer. Ridge closed cell polyisocyanurate foam core bonded to heavy-duty glass fiber mat facers.

B. Polyisocyanurate Board Insulation: ASTM C1289, Type II, Class 1, Grade

2, faced with glass fiber reinforced cellulosic felt facers on both major surfaces of the core foam.

a. Maximum Board Size:

1) 48-inches x 48-inches where adhesively applied

2) Board thickness: minimum (2) layers; maximum 2.5-inch thick per layer.

C. Tapered Roof Insulation System:

http://www.biopreferred.gov/

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1. Rigid, closed cell polyisocyanurate rigid board insulation utilizing non-chlorine/non-ozone depleting blowing agent, bonded to non-asphaltic organic fiberglass facers.

a. ASTM C 1289, Type II, Class 1, Grade 2 (20 psi), tapered 1/2” per foot

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

D. Secondary Insulation Layer/Cover Board: Moisture resistant:

1. 1/2-inch thick gypsum roof board, ASTM C 1278; provide 48” by 48” nominal siz.

2.5 INSULATION ACCESSORIES

A. Cants and Tapered Edge Strips:

1. Wood Cant Strips: Refer to Section 06 10 00, ROUGH CARPENTRY.

2. Insulation Cant Strips: ASTM C208, Type II, Grade 1, cellulosic-fiber insulation board.

3. Tapered Edge Strips: 1/12 (1 inch per 12 inches)

a. Perlite Board: ASTM C728.

2.6 ACCESSORIES

A. Fasteners: Corrosion-resistant carbon steel fasteners and galvalume-coated steel or plastic round plates for fastening substrate board and insulation to roof deck.

B. Nails: ASTM F1667; type to suit application.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Comply with requirements of Division 07 roofing section.

3.2 PREPARATION

A. Examine and verify substrate suitability for product installation.

B. Protect existing construction and completed work from damage.

3.3 INSTALLATION - GENERAL

A. Install products according to manufacturer's instructions.

1. When manufacturer's instructions deviate from specifications, submit proposed resolution for Contracting Officer's Representative consideration.

B. Comply with requirements of UL for insulated steel roof deck.

C. Attach substrate board and other products to meet requirements of

Division 07 roofing section.

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3.4 SUBSTRATE BOARD INSTALLATION

A. Fasten substrate board to top flanges of steel decking to resist uplift pressures according requirements for specified roofing system.

1. Locate the long dimension edge joints solidly bearing on top of decking ribs.

3.5 INSULATION INSTALLATION

A. Insulation Installation, General:

1. Base Sheet: Where required by roofing system, install one lapped base sheet specified in Division 07 roofing section by mechanically fastening to roofing substrate before installation of insulation.

2. Cant Strips: Install // preformed insulation cant strips // wood cant strips specified in Section 06 10 00 ROUGH CARPENTRY // at junctures of roofing system with vertical construction.

3. Use same insulation as existing for roof repair and alterations unless specified otherwise.

B. Insulation Thickness:

1. Thickness of roof insulation shown on drawings is nominal. Provide thickness required to comply with specified thermal performance.

2. When actual insulation thickness differs from drawings, coordinate alignment and location of roof drains, flashing, gravel stops, fascias and similar items.

3. Where tapered insulation is used, maintain insulation thickness at high points and roof edges shown on drawings.

4. Use minimum two layers of insulation when required thickness is

2.5 inch or greater.

C. Lay insulating units with close joints, in regular courses and with end joints staggered.

1. Stagger joints between layers minimum 150 mm (6 inches).

D. Lay units with long dimension perpendicular to the rolled

(longitudinal) direction of the roofing felt.

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

F. Cut to fit tightly against blocking or penetrations.

G. Cover all insulation installed on the same day; comply with temporary protection requirements of Division 07 roofing section.

H. Installation Method:

1. Adhered Insulation:

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a. Set each layer of insulation firmly in ribbons of bead-applied insulation adhesive.

b. Place the initial ribbon of adhesive 3-inches inside each edge/side of the insulation board in a picture-frame fashion.

Apply additional parallel ribbons of adhesive across the remainder of the board in a serpentine fashion and spaced according to roof membrane manufacturer’s ASCE 7-10 calculations.

c. Firmly set insulation boards in the ribbons of foam adhesive following application of the adhesive when adhesive has risen to proper height and walk-in the insulation to spread the adhesive ribbons, ensuring maximum contact. Do not push or slide insulation into position. Set weighted objects on ends, sides, and corners of boards until adhesive has set and insulation is firmly attached.

d. On additional insulation layers, dispense ribbons of adhesive in direction perpendicular to the direction of the beads that were dispensed on the underlying layer.

e. Fill voids or open joints in top layer of insulation with spray-foam adhesive to provide monolithic surface to receive new membrane.

f. Adhere partial boards and tapered edge strips with adhesive ribbon positioned in picture-frame fashion along perimeter of board and remaining adhesive ribbons spaced in accordance with location on roof (field, perimeter, corner.

3.6 COVER BOARD INSTALLATION

A. Install cover boards over insulation with long joints in continuous straight lines with staggered end joints.

B. Offset cover board joints from insulation joints 150 mm (6 inches), minimum.

C. Dispense 1/2-inch wide continuous ribbons of adhesive on substrate to adhere insulation board.

D. Place the initial ribbon of adhesive 3-inches inside each edge/side of the insulation board in a picture-frame fashion. Apply additional parallel ribbons of adhesive across the remainder of the board in a serpentine fashion and spaced according to roof membrane manufacturer’s

ASCE 7-10 calculations.

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E. Firmly set insulation boards in the ribbons of foam adhesive following application of the adhesive when adhesive has risen to proper height and walk-in the insulation to spread the adhesive ribbons, ensuring maximum contact. Do not push or slide insulation into position. Set weighted objects on ends, sides, and corners of boards until adhesive has set and insulation is firmly attached.

F. On additional insulation layers, dispense ribbons of adhesive in direction perpendicular to the direction of the beads that were dispensed on the underlying layer.

G. Fill voids or open joints in top layer of insulation with spray-foam adhesive to provide monolithic surface to receive new membrane.

H. Adhere partial boards and tapered edge strips with adhesive ribbon positioned in picture-frame fashion along perimeter of board and remaining adhesive ribbons spaced in accordance with location on roof

(field, perimeter, corner).

I. At end of each work day, provide staggered ends of installed boards so that proper joint stagger can be achieved on following roof installation.

J. Secure cover boards according to Adhered Insulation requirements.

- - E N D - -

B. Maintain on-site equipment and material necessary to apply emergency temporary weather protection to incomplete work in event of sudden or unexpected precipitation.

B. Fire and Wind Uplift Resistance: Provide roof insulation complying with requirements specified in Division 07 roofing section.