07 31 13.pdf

White City VA Medical Center

White City, OR 97503

Renovate Spaces B217A and B218A for Mental Health Services

Bancroft Architects + Engineers

01-01-21

Contract No. 36C26018D0044

Station Project No. 692-22-105

Bancroft-AE Project No. 22-110 07/24/2025

07 31 13 - 1

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:

Renovate Spaces B217A and B218A for Mental Health Services

Bancroft Architects + Engineers

01-01-21

Contract No. 36C26018D0044

Station Project No. 692-22-105

Bancroft-AE Project No. 22-110 07/24/2025

07 31 13 - 2

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 113 km/h (70 mph) 15 years.

3. Algae-Resistance Warranty Period: No discoloration for 15 years.

PART 2 - PRODUCTS

2.1 PRODUCTS - GENERAL

A. Basis of Design: Verify in field to match existing/adjacent

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: 20 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.

Renovate Spaces B217A and B218A for Mental Health Services

Bancroft Architects + Engineers

01-01-21

Contract No. 36C26018D0044

Station Project No. 692-22-105

Bancroft-AE Project No. 22-110 07/24/2025

07 31 13 - 3

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

3. UL 790 Class A fire resistance.

4. Minimum Weight: 10.3 kg/square meter (210 lbs./100 square feet).

2.3 ROOFING NAILS

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

10 mm to 11 mm (3/8 inch to 7/16 inch) diameter.

1. Nails for Shingles: 32 mm (1-1/4 inches) long.

2. Nails for Felt: 19 mm (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 25400 square mm per m (12 square inches per foot).

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.

Renovate Spaces B217A and B218A for Mental Health Services

Bancroft Architects + Engineers

01-01-21

Contract No. 36C26018D0044

Station Project No. 692-22-105

Bancroft-AE Project No. 22-110 07/24/2025

07 31 13 - 4

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

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 250 mm

(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.

B. Install metal valley flashing shown and as specified under Section

07 60 00, FLASHING AND SHEET METAL.

1. Secure valley flashing according to shingle manufacturer's instructions.

2. Expose flashing in open portion of valley 125 mm (5 inches) minimum, and lap shingles over flashing 125 mm (5 inches) minimum.

3.5 UNDERLAYMENT INSTALLATION

A. Install self-adhering sheet underlayment, working from low point to high point. Lap sides 90 mm (3-1/2 inches) minimum, and lap ends 150 mm

(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 450 mm (18 inches) minimum on both sides.

3. Ridges: Centered on ridge, and extended 900 mm (36 inches) minimum on both sides. Do not cover ridge vent opening.

4. Sidewalls and Projections through Roof: Extended 450 mm (18 inches) from projection, and extended up projection 100 mm (4 inches) minimum.

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

Renovate Spaces B217A and B218A for Mental Health Services

Bancroft Architects + Engineers

01-01-21

Contract No. 36C26018D0044

Station Project No. 692-22-105

Bancroft-AE Project No. 22-110 07/24/2025

07 31 13 - 5

B. Install organic felt underlayment on roof deck not covered by self-adhering sheet underlayment, with 100 mm (4 inches) minimum end laps, 50 mm (2 inches) minimum head laps, and 300 mm (12 inches) minimum ridge laps. Nail felt 125 mm (5 inches) on centers along laps.

3.6 ASPHALT SHINGLE INSTALLATION

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

1. Exposure: 125 mm (5 inches) maximum.

2. Head lap: 50 mm (2 inches) minimum.

B. Install asphalt-shingle starter strip with tabs removed, and overhanging lower edge of roof 13 mm (1/2 inch).

C. Valleys: Open.

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