Contract_Specifications.pdf

USDA FOREST SERVICE PROJECT SPECIFICATIONS

Mobilization 017320 - 1 2016 Modoc Roof Replacement

SECTION 01 73 20

MOBILIZATION

1. PART 1 – GENERAL

1.01 SUMMARY

A. Move personnel, equipment, material, and incidentals to the project, and perform all activities necessary to accomplish work at the project site. Obtain permits, insurance, and bonds.

1.02 MEASUREMENT

A. Method: Measure mobilization by the lump sum.

1.03 PAYMENT

A. The accepted quantity, measured as provided above, will be paid at the contract price per unit of measurement for the pay item listed below that is designated in the

SCHEDULE OF ITEMS.

B. The mobilization lump sum will be paid as follows:

1. If applicable, bond premiums will be reimbursed according to FAR clause

52.232-5, Payment Under Fixed-Price Construction Contracts, after receipt of evidence of payment.

2. Fifty percent of the lump sum, not to exceed 5 percent of the original contract amount, will be paid following completion of 5 percent of the original contract amount, not including mobilization.

3. Payment of the remaining portion of the lump sum, up to 10 percent of the original contract amount, will be paid following completion of 90 percent of the original contract amount, not including mobilization.

4. Any portion of the lump sum in excess of 10 percent of the original contract amount will be paid after final acceptance.

PART 2 PRODUCTS NOT USED

PART 3 EXECUTION NOT USED

END OF SECTION

Asphalt Shingles 073113 - 1

SECTION 07 31 13

ASPHALT SHINGLES

PART 1 - GENERAL

1.1 SECTION REQUIREMENTS

A. Submittals: Submit manufacturer’s technical product data, installation instructions and recommendations for each type of roofing required.

B. Samples: Prior to ordering products, submit Manufacturer’s standard color Samples for Architect’s/Engineer’s selections.

C. Warranties: Manufacturer's standard written warranty, signed by manufacturer agreeing to promptly repair or replace asphalt shingles that fail in materials for a period of at least 40 years, prorated, with first 7 years nonprorated.

PART 2 - PRODUCTS

2.1 PERFORMANCE REQUIREMENTS

A. Exterior Fire-Test Exposure: ASTM E 108 or UL 790, Class A. Identify products with appropriate markings of testing and inspecting agency acceptable to authorities having jurisdiction.

2.2 GLASS-FIBER-REINFORCED ASPHALT SHINGLES

A. Laminated-Strip “Architectural” Asphalt Shingles: ASTM D 3462/D 3462M, laminated, multi-ply overlay construction, mineral-granule surfaced, and self-sealing. Notched cut butt edge.

Acceptable Manufacturer, equivalent or better: GAF®, 1361 Alps Rd. Wayne NJ 07470. Tel: 1-973-628-3000.

2.3 ACCESSORIES

A. Felts: ASTM D 4869, Type II (“30 lb”), asphalt-saturated organic, breathable felt, or alternative if recommended by asphalt shingle manufacturer, with prior approval of engineer/architect.

B. Ridge Vent: Rigid UV-stabilized plastic ridge vent with nonwoven geotextile filter strips and with external deflector baffles; for use under ridge shingles. Alternative may be used

Asphalt Shingles 073113 - 2 if recommended by asphalt shingle manufacturer, with prior approval of engineer/architect.

C. Asphalt Roofing Cement: ASTM D 4586 Type II, asbestos free.

D. Roofing Nails: Aluminum, stainless-steel, or hot-dip galvanized-steel shingle nails, minimum 0.120-inch diameter, of sufficient length to penetrate 3/4 inch into solid wood decking or extend at least 1/8 inch through OSB or plywood sheathing. Where nails are in contact with metal flashing, use nails made from same metal as flashing.

E. Felt-Underlayment Nails: Aluminum, stainless-steel, or hot-dip galvanized-steel wire with low-profile capped heads or disc caps, 1-inch minimum diameter.

F. Sheet Metal Flashing and Trim:

1. Sheet Metal: As recommended by asphalt shingle manufacturer.

2. Drip Edge: Formed sheet metal with at least a 2-inch roof deck flange and a 1-1/2-inch fascia flange with a 3/8-inch drip at lower edge.

3. Open-Valley Flashing: Fabricate with 1-inch-high, inverted-V profile at center of valley and equal flange widths of 12 inches.

PART 3 - EXECUTION

3.1 The following are guide specifications for execution. Comply with the most stringent of the following specifications, the manufacturer’s installation specifications, and local building codes.

3.2 EXAMINATION

Do not begin installation until the roof deck has been properly prepared.

3.3 PREPARATION

A. Remove all existing roofing down to the roof deck.

B. Verify that the deck is dry, sound, clean and smooth. It shall be free of any depressions, waves, and projections. Cover with sheet metal, all holes over 1 inch (25mm) in diameter, cracks over 1/2 inch (12mm) in width, loose knots and excessively resinous areas.

C. Replace damaged deck with new materials.

D. Clean deck surfaces thoroughly prior to installation of eaves protection membrane and underlayment.

3.4 INSTALLATION OF UNDERLAYMENTS

Asphalt Shingles 073113 - 3

A. Eaves and rakes: Apply self-adhering sheet underlayment at eaves and rakes from edges of roof to at least 24 inches inside exterior wall line.

B. Hips and ridges: Install leak barrier along entire lengths of hips and ridges. If ridge vents are to be installed, position the leak barrier so that the ridge slots will not be covered.

C. Valleys: Install eaves protection membrane at least 36 (914mm) inches wide and centered on the valley. Lap ends 6 inches (152mm) and seal.

D. Eave flashing: Install eaves edge metal flashing tight with fascia boards; lap joints 2 inches (51mm) and seal with plastic cement or high quality urethane sealant; nail at the top of the flange.

E. Install felt underlayment on roof deck not covered by self-adhering sheet underlayment.

F. Penetrations:

1. Vent pipes: Install a 24 inch (610 mm) square piece of eaves protection membrane lapping over roof deck underlayment; seal tightly to pipe.

2. Vertical walls: Install eaves protection membrane extending at least 6 inches

(152mm) up the wall and 12 inches (305mm) on to the roof surface. Lap the membrane over the roof deck underlayment.

3. Skylights and roof hatches: Install eaves protection membrane from under the built-in counterflashing and 12 inches (305mm) on to the roof surface lapping over roof deck underlayment.

4. Chimneys: Install eaves protection membrane around entire chimney extending at least 6 inches (152mm) up the wall and 12 inches (305mm) on to the roof surface.

Lap the membrane over the roof deck underlayment.

5. Rake Edges: Install metal edge flashing over eaves protection membrane and roof deck underlayment; set tight to rake boards; lap joints at least 2 inches (51mm) and seal with plastic cement; secure with nails.

3.5 INSTALLATION OF SHINGLES

A. Install starter shingles according to manufacturer’s directions.

B. Minimize breakage of shingles by avoiding dropping bundles on edge, by separating shingles carefully (not by "breaking" over ridge or bundles), and by taking extra precautions in temperatures below 40 degrees F (4 degrees C). Handle carefully in hot weather to avoid scuffing the surfacing, or damaging the shingle edges.

C. Install first and remaining courses of asphalt shingles, stair-stepping diagonally across roof deck with manufacturer's recommended offset pattern at succeeding courses and maintaining uniform exposure.

Asphalt Shingles 073113 - 4

D. Placement and quantity of nails varies based on the type of shingle specified. Consult the application instructions for the specified shingle for details. Nails must be driven flush with the shingle surface. Do not overdrive or under drive the nails

3.6 INSTALLATION OF ATTIC VENTILATION

A. Ventilation must meet or exceed current F.H.A., H.U.D. and local code requirements.

B. Install ridge vent along the entire length of ridges. Cut continuous vent slots through the sheathing, stopping 6 inches (152mm) from each end of the ridge. On roofs without ridge board, make a slot 1 inch (25mm) wide, on either side of the peak (2 inch (51mm) overall). On roofs with ridge board, make two slots 1-3/4 inches (44.5mm) wide, one on each side of the peak (3 ½ inch (89mm) overall).

C. Install ridge vent material along the full length of the ridge, including uncut areas.

D. Butt ends of ridge vent material and join using roofing cement.

E. Install eaves vents in sufficient quantity to equal or exceed the ridge vent area.

3.7 PROTECTION

A. Protect installed products from foot traffic until completion of the project.

B. Any roof areas that are not completed by the end of the workday are to be protected from moisture and contaminants.

2016 Modoc Roof Replacement 074113 - 1

SECTION 07 41 13

PREFORMED METAL ROOF PANELS

1. PART 1 – GENERAL

1.01 SUMMARY

The work includes, but is not necessarily limited to, furnishing and installation of all roofing, soffit, mansard, fascia, and accessories as indicated in the scope of work and specified herein.

1.02 SUBMITTALS

A. PRODUCT DATA

Submit manufacturer’s technical product data, installation instructions and recommendations for each type of roofing required. Include data substantiating that materials comply with requirements. Panel manufacturers without full supporting product literature, Flashing & Details Guides, Guide Specifications, and Technical Support shall not be considered equal to the specified product.

B. SAMPLES

Prior to ordering products, submit Manufacturer’s standard color Samples for Architect’s/Engineer’s selections.

1.03 DELIVERY, STORAGE, AND HANDLING

A. Protect against damage and discoloration.

B. Handle panels with non-marring slings.

C. Do not bend panels.

D. Store panels above ground, with one end elevated for drainage.

E. Protect panels against standing water and condensation between adjacent surfaces.

F. If panels become wet, immediately separate sheets, wipe dry with clean cloth, and allow to air dry.

G. Remove any strippable film coating prior to installation and in any case, do not allow the strippable film coating to remain on the panels in extreme heat, cold or in direct sunlight or other UV source.

1.04 WARRANTY

A. Furnish a written 25-year minimum manufacturer’s warranty on roofing material.

2. PART 2 - PRODUCTS

2.01 ACCEPTABLE MANUFACTURER

A. Equal or better: ASC Building Products Inc., 2110 Enterprise Boulevard, West Sacramento, California 95691-3493, Phone: 916-372-6851, Fax: 916-372-7606.

B. Panel Designation: Equal or better: Skyline Roofing

2016 Modoc Roof Replacement 074113 - 2

2.02 MATERIALS

A. Roofing panels and ridge cap: Provide factory formed, prefinished, concealed fastener, integral standing seam metal roof system that has been certified by the manufacturer to comply with the following requirements:

1. UL Wind Uplift Class 90 rating

2. UL Class A Fire Resistance

3. 0.018 inch aluminum, embossed finish, or 26 gauge steel, baked enamel, embossed finish.

B. Valley flashing, gable and eave trim: 0.018 inch aluminum or 26 gauge steel.

Valley flashing shall be 36 inches wide minimum. Flashing shall be shop fabricated by panel manufacturer from material that is the same finish as the panels to which they will be attached.

C. Vent: Ridge cap shall be installed with integrated vent system as recommended and provided by the manufacturer to provide free air flow but restrict water and insect access. Roof sheathing shall be trimmed if necessary to meet manufacturer’s recommendations.

D. Screws: Select fastener according to manufacturer’s recommendation for attachment material that roofing will be fastened to.

E. Felt: ASTM D226 Type I, 30 pounds/square.

4. PART 3 – EXECUTION

5.

6. 3.01 EXAMINATION

A. EXISTING CONDITIONS

1. Inspect installed work of other trades and verify that such work is complete to a point where this work may continue.

2. Verify that installation may be made in accordance with approved shop drawings and manufacturer’s instructions.

3. Roof system shall NOT be installed over an existing roof. All existing roof materials shall be removed to the deck.

7. 3.02 PREPARATION

A. FIELD MEASUREMENTS

1. Verify prior to fabrication.

2. If field measurements differ from drawing dimensions, notify Architect/Engineer prior to fabrication.

B. PROTECTION

1. Treat, or isolate with protective material, and contacting surfaces of dissimilar materials to prevent electrolytic corrosion.

2. Require workmen who will be walking on Roofing panels to wear clean, soft-soled work shoes that will not pick up stones or other abrasive material which could cause damage or discoloration.

3. Protect Work of other Trades against damage and discoloration.

C. SURFACE PREPARATION

1. Clean and dry surfaces prior to applying sealant

2016 Modoc Roof Replacement 074113 - 3

8. 3.03 INSTALLATION

A. FELT

1. Apply felt in horizontal courses starting at the eaves. Lap edges a minimum of three inches.

2. Scatter nail or staple felt.

B. PANELS

1. Follow roof panel manufacturer’s directions exactly.

2. Install panel seams vertically.

3. Lap panels away from prevailing wind direction.

4. Secure panels without warp or deflection.

5. Fully engage interlocking seams.

6. Extended roof panels to overlap gutter openings 1 inch.

7. Remove strippable protective film, if used, immediately preceding panel installation.

C. ALLOWABLE ERECTION TOLERANCE

1. Maximum Alignment Variation: ¼ inch in 40 feet.

D. FLASHING

1. Follow manufacturer’s directions.

2. Overlap roof panels at least 6 inches.

3. Install flashings to allow for thermal movement.

E. CUTTING AND FITTING

1. Neat, square and true. Torch cutting is prohibited where exposed to final view.

2. Where necessary to saw-cut panels, debur and treat with galvanic paint.

9. 3.04 CLEAN UP AND CLOSE OUT

A. TOUCH-UP

1. Touch-up damaged paint surfaces with air dry touch-up paint provided by manufacturer. Follow directions carefully to minimize color irregularities. Small brush application only. Do not spray touch-up paint.

B. CLEANING AND REPAIRING

1. At completion of each day’s work and at work completion, sweep Panels, Flashings and Gutters clean. Do not allow fasteners, cuttings, filings or scraps to accumulate.

2. Remove debris from Project Site upon work completion or sooner, if directed.

E. Felt: ASTM D226 Type I, 30 pounds/square.