A8 - Asphalt shingles.pdf

01-01-21

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SECTION 07 31 13

ASPHALT SHINGLES

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes: Fiberglass asphalt shingles over underlayment nailed to roof sheathing.

1.2 RELATED WORK

A. Section 07 60 00, FLASHING AND SHEET METAL: Counterflashing and

Flashing of Roof Projections.

1.3 APPLICABLE PUBLICATIONS

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

B. ASTM International (ASTM):

D226/D226M-17...........Asphalt-Saturated Organic Felt Used in Roofing and Waterproofing.

D1970/D1970M-19.........Self-Adhering Polymer Modified Bituminous Sheet

Materials Used as Steep Roofing Underlayment for Ice Dam Protection.

D3018/D3018M-11(2017)...Class A Asphalt Shingles Surfaced with Mineral

Granules.

D3161/D3161M-20.........Wind Resistance of Steep Slope Roofing Products

(Fan-Induced Method).

D3462/D3462M-19.........Asphalt Shingles Made from Glass Felt and

Surfaced with Mineral Granules.

F1667-18a...............Driven Fasteners: Nails, Spikes, and Staples.

C. UL LLC (UL):

790(Edition 8)..........Fire Tests of Roof Coverings.

1.4 SUBMITTALS

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

B. Manufacturer's Literature and Data:

1. Description of each product.

2. Installation instructions.

3. Warranty.

C. Samples: Shingles: Full size each type, color and texture.

D. Sustainable Construction Submittals:

SPEC WRITER NOTE: Retain sustainable construction submittals appropriate to product.

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1. Solar Reflectance Index (SRI) for asphalt shingles.

1.5 DELIVERY

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

B. Mark packaging, legibly. Indicate manufacturer's name or brand, type, color, production run number, manufacture date, and the label of

Underwriters Laboratories.

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

1.6 STORAGE AND HANDLING

A. Store shingles according to manufacturer's instructions. Store roll goods on end in upright position.

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

C. Keep materials dry, covered completely and protected from weather.

1.7 WARRANTY

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

Construction."

B. Manufacturer's Warranty: Warrant asphalt shingles against material and manufacturing defects.

1. Material Warranty Period: 25 years.

2. Wind-Speed Warranty Period: Resist wind speeds up to 90 mph for 15 years.

3. Algae-Resistance Warranty Period: No discoloration for 10 years.

PART 2 - PRODUCTS

2.1 PRODUCTS - GENERAL

A. Basis of Design: Section 09 06 00, SCHEDULE FOR FINISHES.

B. Provide each product from one manufacturer.

1. Provide each product exposed to view from one production run.

C. Sustainable Construction Requirements:

1. Asphalt Shingle Recycled Content: 50 - 100 percent post-consumer recycled content, minimum.

2. Solar Reflectance Index: 29, minimum.

2.2 ASPHALT SHINGLES

A. Asphalt Shingles: Fiberglass reinforced, laminated type, square butt.

1. ASTM D3462/D3462M and ASTM D3018/D3018M, Type I, self-sealing.

2. ASTM D3161/D3161M, Class D or F wind-resistant.

3. UL 790 Class A fire resistance.

4. Minimum Weight: 210 lbs./100 square feet.

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2.3 ROOFING NAILS

A. ASTM F1667, Type I, Style 20, galvanized steel, deformed shanks, heads

3/8 inch to 7/16-inch diameter.

1. Nails for Shingles: 1-1/4 inches long.

2. Nails for Felt: 3/4 inch long.

2.4 ROOFING UNDERLAYMENT

A. Organic Felt: ASTM D226/D226M, Type l.

B. Self-Adhering Modified Bituminous Underlayment: ASTMD1970/D1970M.

2.5 METAL FLASHING

A. Provide metal roof flashings, including apron flashings, step flashings, valley flashings, drip edges, and vent pipe flashings specified in Section 07 60 00, FLASHING AND SHEET METAL.

2.6 RIDGE VENTS

A. Ridge Vents: Manufacturer's standard ridge vent for use under asphalt shingles.

1. Provide ridge vents with internal filters, internal baffles, or external baffles, for weather protection.

2. Free Area: Minimum 12 square inches per foot.

2.7 SNOW GUARDS

A. Snow Guards: Stainless steel or aluminum individual snow guards designed for use with asphalt shingles.

PART 3 - EXECUTION

3.1 PREPARATION

A. Examine and verify substrate suitability for roofing installation.

1. Verify roof substrates are sound, within manufacturer's tolerances, and free from defects which would interfere with roofing installation.

2. Verify roof accessories, vent pipes and other projections through roof are in place and roof flashing is installed, or ready for installation, before installing shingles.

B. Protect existing construction and completed work from damage.

3.2 INSTALLATION - GENERAL

A. Install products according to manufacturer's instructions and approved submittal drawings.

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

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3.3 METAL DRIP EDGE INSTALLATION

A. At eaves and rakes, install stainless steel drip edges specified in

Section 07 60 00, FLASHING AND SHEET METAL.

1. Eaves: Install metal drip edge before underlayment.

2. Rakes: Install metal drip edge after underlayment.

B. Secure metal drip edges with compatible nails spaced maximum 10 inches on center along inner edges.

3.4 FLASHING INSTALLATION

A. Install metal flashings specified in Section 07 60 00, FLASHING AND

SHEET METAL at intersections of roofs, adjoining walls, or projections through deck such as chimneys and vent stacks.

3.5 UNDERLAYMENT INSTALLATION

A. Install self-adhering sheet underlayment, working from low point to high point. Lap sides 3-1/2 inches minimum, and lap ends 6 inches minimum. Install at the following locations:

1. Eaves and Rakes: From edge of eave and rake to 600 mm (24 inches) minimum beyond inside face of exterior wall.

a. Lap underlayment over eave metal drip edge.

2. Valleys, Hips and Roof Slope Transitions: Centered over change in slope and extended 18 inches minimum on both sides.

3. Ridges: Centered on ridge and extended 36 inches minimum on both sides. Do not cover ridge vent opening.

4. Sidewalls and Projections through Roof: Extended 18 inches from projection and extended up projection 4 inches minimum.

5. Firmly roll underlayment to ensure adhesion to roof deck and metal flashings.

B. Install organic felt underlayment on roof deck not covered by self-adhering sheet underlayment, with 4 inches minimum end laps, 2 inches minimum head laps, and 12 inches minimum ridge laps. Nail felt

5 inches on centers along laps.

3.6 ROOF ACCESSORY INSTALLATION

A. Lap underlayment and asphalt shingles over upslope base flanges of roof accessory flashings.

B. Install underlayment and asphalt shingles over side slope base flanges of roof accessory flashings.

C. Install downslope base flanges of roof accessories over asphalt shingles.

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3.7 ASPHALT SHINGLE INSTALLATION

A. Install shingles aligned parallel to roof eave, nailed to roof sheathing.

1. Exposure: 5 inches maximum.

2. Head lap: 2 inches minimum.

B. Install asphalt-shingle starter strip with tabs removed, and overhanging lower edge of roof 1/2 inch.

3.8 RIDGE VENT INSTALLATION

A. Install ridge vents over shingles.

1. Extent: Continuous along ridges extending to within 1 foot of rakes.

3.9 HIP AND RIDGE SHINGLE INSTALLATION

A. Bend each shingle lengthwise down center to provide equal exposure on both sides of hip and ridge.

1. Begin ridge installation at leeward end of ridge. Cover ridge vents with shingles. Do not cover ridge vent openings with ridge shingles.

2. Begin hip installation at eave.

B. Install shingles with maximum 5 inches exposure.

C. Secure each shingle with one nail on both sides of hip and ridge, 8-1/2 inches back from exposed end and one inch up from edge.

3.10 SNOW GUARD INSTALLATION

A. Install snow guards in layout recommended by manufacturer.

1. Fasten snow guards with fasteners concealed by shingles.

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