CRD Roofs Project Specifications.pdf

US Department of Agriculture (USDA)

Cordova Roof Restorations Project Specifications

SPECIFICATIONS INDEX

SECTION TITLE

013300 Submittal Procedures 061000 Rough Carpentry 075700 Roof Coating Systems 077100 Roof Specialties 077253 Snow Guards 079200 Joint Sealants

03/2023

SUBMITTAL PROCEDURES 013300 - 1

SUBMITTAL PROCEDURES

SECTION 013300

PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes administrative and procedural requirements for submitting Shop Drawings, Product Data, Samples, and other miscellaneous submittals.

1.2 DEFINITIONS

A. Informational Submittals: Written information that does not require CO's approval.

Submittals may be rejected for not complying with requirements.

1.3 SUBMITTAL PROCEDURES

A. Coordination: Coordinate preparation and processing of submittals with performance of construction activities.

1. Coordinate transmittal of different types of submittals for related parts of the Work so processing will not be delayed because of need to review submittals concurrently for coordination.

a. CO reserves the right to withhold action on a submittal requiring coordination with other submittals until related submittals are received.

B. Processing Time: Allow enough time for submittal review, including time for resubmittals follows. Time for review shall commence on CO's receipt of submittal.

1. Initial Review: Allow 10 workdays for initial review of each submittal. Allow additional time if processing must be delayed to permit coordination with subsequent submittals. CO will advise Contractor when a submittal being processed must be delayed for coordination.

2. If intermediate submittal is necessary, process it in same manner as initial submittal.

3. Allow 10 workdays for processing each resubmittal.

4. No extension of the Contract Time will be authorized because of failure to transmit submittals enough in advance of the Work to permit processing.

C. Identification: Place title block on each submittal for identification.

1. Include the following information on label for processing and recording action taken:

a. Project name.

b. Date.

c. Name and address of Contractor.

d. Name of manufacturer.

e. Unique identifier, including revision number.

f. Number and title of appropriate Specification Section.

SUBMITTAL PROCEDURES 013300 - 2

g. Drawing number and detail references, as appropriate.

h. Other necessary identification.

D. Deviations: Highlight, encircle, or otherwise identify deviations from the Contract Documents on submittals.

E. Use for Construction: Use only final submittals with mark indicating action taken by CO in connection with construction.

PART 2 - PRODUCTS

2.1 ACTION SUBMITTALS

A. General: Prepare and submit Action Submittals required by individual Specification Sections.

1. Number of Copies: Submit electronically in .pdf format to the CO and COR, unless requested in a different format by the CO or COR. Provide hard copies as requested.

B. Product Data: Collect information into a single submittal for each element of construction and type of product or equipment.

1. If information must be specially prepared for submittal because standard printed data are not suitable for use, submit as Shop Drawings, not as Product Data.

2. Mark each copy of each submittal to show which products and options are applicable.

3. Include the following information, as applicable:

a. Manufacturer's written recommendations.

b. Manufacturer's product specifications.

c. Manufacturer's installation instructions.

d. Manufacturer's catalog cuts.

e. Compliance with recognized trade association standards.

f. Compliance with recognized testing agency standards.

C. Shop Drawings: Prepare Project-specific information, drawn accurately to scale. Do not base

Shop Drawings on reproductions of the Contract Documents or standard printed data.

1. Preparation: Include the following information, as applicable:

a. Dimensions.

b. Identification of products.

c. Fabrication and installation drawings.

d. Notation of dimensions established by field measurement.

SUBMITTAL PROCEDURES 013300 - 3

D. Samples: Prepare physical units of materials or products, including the following:

1. Samples for Initial Selection: Submit manufacturer's color charts consisting of units or sections of units showing the full range of colors available.

2.2 INFORMATIONAL SUBMITTALS

A. General: Prepare and submit Informational Submittals required by other Specification Sections.

1. Submit electronically in .pdf format to the CO and COR, unless requested in a different format by the CO or COR. Provide hard copies as requested.

2. Certificates and Certifications: Provide a notarized statement that includes signature of entity responsible for preparing certification. Certificates and certifications shall be signed by an officer or other individual authorized to sign documents on behalf of that entity.

B. Manufacturer's Instructions: Prepare written or published information that documents manufacturer's recommendations, guidelines, and procedures for installing or operating a product or equipment. Include name of product and name, address, and tele- phone number of manufacturer.

PART 3 - EXECUTION

3.1 GENERAL

A. Review each submittal and check for compliance with the Contract Documents. Note corrections and field dimensions. Mark with approval stamp before submitting to CO.

B. Submittals not required by the Contract Documents will not be reviewed and may be discarded.

END OF SECTION 01330

ROUGH CARPENTRY 061000 - 1

ROUGH CARPENTRY

SECTION 061000

PART 1 - GENERAL

1.1 SUMMARY

A. Provide wood sheathing, nails, bolts, screws, framing anchors and other rough hardware, and other items as needed for a complete and proper installation.

1.2 SUBMITTALS

A. Product Data: Submit manufacturer's product data and installation instructions for each material and product used.

1.3 QUALITY ASSURANCE

A. Comply with governing codes and regulations. Provide products of acceptable manufacturers, which have been in satisfactory use in similar service for three years. Use experienced installers.

Deliver, handle, and store materials in accordance with manufacturer's instructions.

B. Construction Panel Standards: DOC PS 1, U.S. Product Standard for Construction and Industrial Plywood; APA PRP-108.

C. Preservative Treatment: AWPA C2 for lumber and AWPA C9 for plywood; waterborne pressure treatment. Provide for wood in contact with soil, concrete, masonry, roofing, flashing, dampproofing and waterproofing.

D. Fire-Retardant Treatment: AWPA C20 for lumber and AWPA C27 for plywood; noncorrosive type. Provide at building interior where required by code.

PART 2 - PRODUCTS

2.1 MATERIALS

A. Roof Sheathing & Repairs: ¾” Plywood Roof Sheathing: Exterior, Structural I Sheathing.

Thickness shall match existing.

B. Face Grade: Decorative: Sound knots and natural characteristics are allowed, including chipped edge knots, short end splits, seasoning checks, and some pin holes. Face knot holes, stains, end slits, skips, roller splits, and planer burns are not allowed.

C. Moisture Content: Provide wood roof decking with 15 percent maximum moisture content at time of dressing.

D. Laminating Adhesive: Wet-use type complying with ASTM D2559.

E. Fascia wood must be a minimum of 1” thick, with dimensions matching those of the adjacent fascia.

ROUGH CARPENTRY 061000 - 2

2.2 ACCESSORY MATERIALS

A. Fastener Material: Hot-dip galvanized steel.

B. Sealants: Silicone, complying with applicable requirements in Section 079200 "Joint Sealants" and recommended by sealant manufacturer and manufacturer of substrates for intended application. If not covered in 079200, defer to manufacturer’s recommended sealants.

C. Paint: 1 coat primer, 2 coats paint. Acrylic latex formulated specifically for exterior wood application.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Install laminated wood roof decking to comply with manufacturer's written instructions.

B. Securely attach rough carpentry work to substrate by anchoring and fastening as indicated.

C. Plywood: Comply with applicable recommendations contained in APA Form No. E30K, "APA Design/Construction Guide: Residential & Commercial"

D. Provide nailers, blocking and grounds where required. Set work plumb, level and accurately cut.

E. Install materials and systems in accordance with manufacturer's instructions and approved submittals. Install materials and systems in proper relation with adjacent construction.

Coordinate with other work.

F. Place plywood with face grain perpendicular to support and continuously over at least two supports, except where otherwise shown on the drawings.

G. Center joints accurately over supports, unless otherwise shown on the drawings.

H. Comply with manufacturer's requirements for cutting, handling, fastening and working with treated materials.

I. Restore damaged components. Protect work from damage.

J. Apply paint in accordance with manufacturer’s instructions, including surface preparation and handling. Apply to entire length of visible fascia, not only the repaired portion. Color shall match existing fascia.

K. Apply joint sealant to seal roof decking at exterior walls at the following locations:

1. Between roof decking and supports located at exterior walls.

2. Between roof decking and exterior walls that butt against underside of roof decking.

3. Between tongues and grooves of roof decking over exterior walls and supports at exterior walls.

ROUGH CARPENTRY 061000 - 3

3.2 FASTENING

A. Use only common wire nails or spikes, except where otherwise specifically noted on the drawings.

B. For conditions not covered provide penetration into the piece receiving the point of not less than ½ the length of the nail or spike, provided, however, that 16d nails may be used to connect two pieces of 2” (nominal) thickness.

C. Nail without splitting wood. Predrill as required.

D. Remove split members and replace with members complying with the specified requirements.

3.3 PROTECTION

A. Provide water-resistive barrier over roof decking as the Work progresses to protect roof decking until roofing is applied.

END OF SECTION 061000

ROOF COATING SYSTEMS 075700 - 1

ROOF COATING SYSTEMS

SECTION 075700

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Polyurethane Coating System

1.2 DEFINITIONS

A. Applicator: A qualified person employed to apply polyurethane roof coatings.

B. Installer: A qualified firm contracted to install polyurethane roof coatings.

1.3 ACTION SUBMITTALS

A. Product Data: For each type of product.

B. Samples: For each exposed product and for each color and texture specified, if requested.

1.4 INFORMATIONAL SUBMITTALS

A. Product certificates.

B. Sample warranty.

C. Applicator qualifications.

D. Substrate conditions:

1. Applicator to present to the CO a completed inspection report verifying substrate condition and any noted defects not specifically addressed in regard to the installation of the coating.

2. Surface shall be free from loose dirt, stone, debris, moisture, and shall be in stable condition. Any work on the area to receive this application shall be completed prior to the installation of the coating.

3. Applicator shall complete a substrate inspection prior to the start of the installation of the coating. The CO and Applicator shall accept the substrate.

1.5 QUALITY ASSURANCE

A. Applicator Qualifications:

1. Submit current Letter of Good Standing from the specified waterproofing manufacturer.

Applicator must be approved by the manufacturer to supply fully warranted coating system.

2. Applicators shall have a minimum of five (5) years’ experience in the application of waterproofing materials of the type specified.

ROOF COATING SYSTEMS 075700 - 2

1.6 WARRANTY

A. Manufacturer warrants that the material supplied will meet or exceed physical properties as published. The Applicator guarantees that workmanship will be free of defects in coating application.

B. A twenty (20) year labor and material warranty must be obtained through the manufacturer.

1.7 DELIVERY, STORAGE, AND HANDLING

A. The Government shall reject damaged or non-conforming materials. Rejected materials must be removed immediately from the job site.

B. Store the coating materials as recommended by the manufacturer and conforming to applicable safety regulatory agencies: town or city, state, and federal. Refer to all applicable data including, but not limited to: Safety Data Sheets, Product Data Sheets, product labels, and specific instructions for personal protection.

C. Provide adequate ventilation, protection from hazardous fumes, and overspray potential to workers and associated trades in close proximity of the site application.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. Primary waterproofing materials shall be the products of a single manufacturer. Secondary materials shall be recommended by the primary manufacturer. The manufacturer shall have a minimum of ten (10) years’ experience in the manufacture of materials of this type.

B. An example of an acceptable manufacturer is Gaco, or a similarly qualified manufacturer whose products can meet these specifications.

2.2 POLYURETHANE COATING SYSTEMS

A. Polyurethane Coating System: Fast Set Polyurea Hybrid with a low viscosity, fast curing, two-component, 100% solids, fire retarded waterproofing elastomer with a two-component aliphatic polyurethane topcoat.

1. Base coat: Fast set polyurea hybrid.

2. Topcoat: Two-component aliphatic polyurethane.

a. Color: To be selected from full palate of manufacturer’s options.

3. Tensile Strength: 2200 psi base coat, 3000 psi topcoat, min according to ASTM D412, or 435 psi according to ASTM D2370.

4. Elongation: 225% base coat, 180% topcoat, min according to ASTM D412 after 1000 hours accelerated weathering according to ASTM D4798/D4798M.

5. Water Absorption: 2.5% maximum by weight according to ASTM D471.

6. Tear Resistance: 200 pli base coat, 480 pli topcoat, min according to ASTM D624.

7. Vapor Permeance: Minimum .02 perm inches, according to ASTM E96/E96M, Procedure B.

ROOF COATING SYSTEMS 075700 - 3

8. An example of an acceptable system is the GacoFlex U8782 base coat and UA60 Aliphatic Polyurethane coating. Other manufacturers may be acceptable if they meet the requirements above – contactor may submit other equal products for CO approval.

2.3 AUXILIARY MATERIALS

A. General: Auxiliary materials recommended in writing by roofing manufacturer for intended use.

B. Primer: Polyurethane manufacturer's standard factory-formulated primer.

C. Mineral Granules: Ceramic-coated roofing granules, No. 11 screen size with 100 percent passing No. 8 (2.36-mm) sieve and 98 percent of mass retained by No. 40 (0.42-mm) sieve.

1. Color: Gray.

D. Reinforcement: Flexible polyester or fiberglass mat of weight, type, and composition recommended in writing by coating manufacturer for embedment in liquid coating. May be required at flashing or curb intersections – follow manufacturer’s requirements to obtain system warranty.

E. Sealant: ASTM C920, Class 50, Use NT, Grade NS, or as recommended in writing by coating manufacturer for substrate and joint conditions and for compatibility with roofing materials. See Specifications Section 079200 Joint Sealants, for additional requirements.

F. Sheet Flashing and Accessories: Types recommended in writing by coating manufacturer, provided at locations indicated and as recommended. See Specifications Section 077100 Roof Specialties, for additional requirements.

G. Metal Roof Panels: Any replacement panels required prior to coating application must match the adjacent panels in material, thickness, color, and rib pattern. Handling, storage, and installation of the replacement material must be done in strict accordance with the manufacturer’s instructions.

H. Roof Penetration Flashing: All penetration boots and flashing shown on the drawings must be replaced prior to coating. New boots shall be EPDM, aluminum, or other approved material.

Product must be manufactured for use on sloped metal roofs and installed in strict accordance with the manufacturer’s recommendations. Material selection must be compatible with the polyurethane coating system and approved by the coating manufacturer.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Metal panels must be structurally sound and securely fastened. Severe oxidation may render some panels unsuitable to serve as a proper substrate for the coating and should be replaced as needed. While this is not anticipated to be an issue on this project, the Applicator must inspect and agree prior to beginning coating application.

B. Verify that substrate is ready to receive work; surface is clean, dry and free of substances that could affect bond.

ROOF COATING SYSTEMS 075700 - 4

C. Verify that all other work involved with this area, done under other sections, has been completed.

3.2 SURFACE PREPARATION

NOTE: IT IS EXTREMELY IMPORTANT FOR THE ROOF TO BE CLEAN AND DRY.

A. Remove heavy deposits of dirt, leaves and other debris from the roof using a stiff broom.

Inspect metal fasteners and retighten where possible. Where fasteners are missing, corroded, or neoprene grommets are deteriorated, replace with oversize screws. Inspect horizontal and vertical seams, panel end laps, and tension bars/straps. Where necessary, remove fasteners to separate the panels, remove existing sealant, add new butyl caulk, and re-secure with new fasteners to create a water-tight compression seal.

B. Pressure wash the roof with water and allow to dry completely. After the roof is dry from initial cleaning, apply a manufacturer applied surface cleaner according to label instructions with sprayer of choice, using a 3-4 ft (0.91-1.22 m) arc pattern. A Hudson-type agricultural sprayer, conventional pressure sprayer or airless sprayer is recommended. Allow solution to stand for 10-15 minutes, adding a light mist of water to prevent drying. While it sets, lightly agitate any heavily soiled areas with a broom or brush. Do not allow dirt to settle in low areas. Use a commercial power washer >3,000 psi (20.69 MPa) to remove debris and continue rinsing until all suds are gone. Start at the lowest point of the roof and work towards the highest point. For low-sloped roofs, work away from and then back towards drainage devices. It is important to keep the surface wet until all of the cleaners and other residue has been completely rinsed off and the surface is clean.

C. BIOLOGICAL CONTROL: Areas of algae, mildew or fungus on the roof should be treated with a solution of one part bleach to three parts water followed by a power washer rinse using clear water.

D. DRYING: Allow surfaces to dry thoroughly. Examine the roof, paying particular attention to areas of physical damage or previous repairs to determine that residual water has in fact dried before continuing application. NOTE: Drying time depends on weather conditions such as temperature, humidity, and air movement. The above drying time assumes good weather (70°F daytime temperature) and no rain. Lower temperatures or overcast conditions will extend dry times.

E. Structurally sound metal panels with moderate to extensive oxidation should be cleaned and/or lightly abraded to remove loose surface rust and treated with a rust-inhibiting primer to help prevent corrosion from spreading.

F. Substrate Condition: Loose paint, powdery or friable rust and scale must be completely removed by power brushing to provide a sound, tight surface. Soft asphalt, and/or bitumastics and silicone caulking shall be completely removed.

3.3 COATING APPLICATION

A. Apply coating system to metal roofing by spray, roller, or other suitable application method according to coating manufacturer's written instructions.

ROOF COATING SYSTEMS 075700 - 5

B. Apply base coat(s) and topcoat(s) to obtain a uniform, seamless membrane free of blisters and pinholes. Apply each coat at right angles to preceding coat, using contrasting color tints for successive coats.

1. Urethane Coating System: Apply coating system as follows:

a. Primer:

1) No rust: Apply 1 coat of primer at a rate of one gallon per 300 sq. ft.

2) Minimal rust: Apply 2 coats of primer at a rate one gallon per 300 sq. ft per pass, resulting in a total of one gallon per 150 sq. ft. of finished primer.

3) Pronounced rusting: Apply 2 coats of primer at one gallon per 150 sq. ft. per pass, resulting in one gallon per 75 sq. ft. of finished product.

4) Allow drying to the touch, but no more than 72 hours prior to coating. If more than 72 hours pass, mechanically abrade surface, and recoat with primer at one gallon per 300 sq ft.

b. Flashing & Seams: Apply fast set polyurea hybrid with plural component airless equipment. Seams and flashing must have a minimum of 64 mils of total film thickness which should be applied in a single pass while spraying into the seam.

Note: Allow to dry, inspect seams. Where seams show openings, choose one:

1. Apply an additional pass of polyurea hybrid.

2. Seal with a single-component polyurethane sealant.

Note: All seams and penetration flashing must be fully encapsulated before proceeding to the next step.

c. Base Coat: Fast set polyurea hybrid, 32 mils DFT

NOTE: Coating must cover all surfaces completely at a minimum of 32 mils.

Extra coating material is required at all edges and penetrations. Contractor should figure 10% losses due to overspray, texture, and wind.

d. Topcoats: Aliphatic polyurethane, 16 mils WFT / 11 mils DFT each

C. Height at Terminations: Apply coating system at wall terminations and other vertical surfaces to extend vertically beyond the metal flashing by a minimum of 6 inches.

D. Drip Edge and Metal Fascia: Apply the coating system to all metal drip edges and matching fascia/flashing (not the fascia matching the siding). Prepare the surface similar to the main roof area and utilize masking to protect the adjacent fascia and siding.

E. Mineral Granules: Apply mineral granules over wet topcoat, using pressure equipment at the rate of 0.5 lb/sf. Remove excess granules after topcoat has cured. Then apply the second topcoat to seal in granules. Consult coating manufacturer for additional application requirements.

F. Sealant: Apply sealant to perimeter and other terminations as required by the manufacturer to obtain the 20-year system warranty.

ROOF COATING SYSTEMS 075700 - 6

G. Cure coatings according to manufacturer's written instructions, taking care to prevent contamination and damage during application stages and curing. Do not permit traffic on uncured coatings.

H. Defects: There shall be no blisters, pinholes, voids or membrane defects of any kind.

Appearance shall be smooth and uniform, as observed from the ground.

I. Overspray: Any instances of overspray or damage to adjacent items will be solely the contractor’s responsibility to fix at no additional cost to the Government.

END OF SECTION 075700

ROOF SPECIALTIES 077100 - 1

ROOF SPECIALTIES

SECTION 077100

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Roof-edge specialties.

2. Roof-edge drainage systems (gutters).

1.2 ACTION SUBMITTALS

A. Product Data: For each type of product.

B. Shop Drawings: For roof specialties.

1. Include plans, elevations, expansion-joint locations, keyed details, and attachments to other work, if requested by CO. Distinguish between plant- and field-assembled work.

C. Samples: For each type of roof specialty and for each color and texture specified, if requested by CO.

1.3 QUALITY ASSURANCE

A. Comply with governing codes and regulations. Provide products of acceptable manufacturers, which are designed for and have been in-use satisfactory for similar service in the project area.

Use experienced installers. Deliver, handle, and store materials in accordance with manufacturer's instructions.

1.4 WARRANTY

A. Special Warranty on Painted Finishes: Manufacturer agrees to repair finish or replace roof specialties that show evidence of deterioration of factory-applied finishes within specified warranty period.

1. Fluoropolymer Finish: Deterioration includes, but is not limited to, the following:

a. Color fading more than 5 Delta E units when tested according to ASTM D2244.

b. Chalking in excess of a No. 8 rating when tested according to ASTM D4214.

c. Cracking, checking, peeling, or failure of paint to adhere to bare metal.

2. Finish Warranty Period: 20 years from date of acceptance.

ROOF SPECIALTIES 077100 - 2

2.1 PERFORMANCE REQUIREMENTS

A. FM Approvals' Listing: Manufacture and install roof-edge specialties that are listed in FM Approvals' "RoofNav" and approved for windstorm classification, Class 1-120. Identify materials with FM Approvals' markings. Alternatively, the manufacturer or contractor can provide evidence of satisfying ASCE 7 wind speed requirements in lieu of FM certification.

For Cordova, ASCE 7 Vmph = 158 mph. This equates to 54 psf perimeter, and 67 psf corners.

B. Thermal Movements: Allow for thermal movements from ambient and surface temperature changes to prevent buckling, opening of joints, hole elongation, overstressing of components, failure of joint sealants, failure of connections, and other detrimental effects. Provide clips that resist rotation and avoid shear stress as a result of thermal movements. Base calculations on surface temperatures of materials due to both solar heat gain and nighttime-sky heat loss.

1. Temperature Change (Range): 120 deg F (67 deg C), ambient;, material surfaces.

2.2 ROOF-EDGE SPECIALTIES

A. Roof-Edge Fascia (canted or standard): Manufactured, two-piece, roof-edge fascia consisting of snap-on or compression-clamped metal fascia cover in section lengths not exceeding 12 feet (3.6 m) and a continuous formed galvanized-steel sheet cant (if applicable), 0.034 inch thick, minimum, with extended vertical leg terminating in a drip-edge cleat. Provide matching corner units.

1. Metallic-Coated Steel Sheet Fascia Covers: Zinc-coated (galvanized) steel, nominal thickness as required to meet performance requirements.

a. Surface: Smooth, flat

b. Finish: Three-coat fluoropolymer, AAMA 621.

c. Color: Match adjacent materials.

2. Formed Aluminum Sheet Fascia Covers: Aluminum sheet, 20 ga. minimum thickness or as required to meet performance requirements.

a. Surface: Smooth, flat finish.

b. Finish: Three-coat fluoropolymer, AAMA 2605.

c. Color: Match adjacent materials.

3. Corners: Factory mitered continuously welded or soldered.

4. Splice Plates: Concealed, of same material, finish, and shape as fascia cover.

2.3 ROOF-EDGE DRAINAGE SYSTEMS

A. Gutters: Manufactured and installed continuous style with matching corner units, ends, outlet tubes, and other accessories. Elevate back edge at least 1 inch (25 mm) above front edge.

Furnish flat-stock gutter straps, gutter brackets, expansion joints, and expansion-joint covers fabricated from same metal as gutters.

1. Zinc-Coated Steel: Nominal 0.018-inch (0.45-mm) minimum thickness.

ROOF SPECIALTIES 077100 - 3

2. Aluminum Sheet: 0.032 inch (0.81 mm) minimum thick.

3. Gutter Profile: Style K or half-round according to SMACNA's "Architectural Sheet Metal

Manual."

4. Corners: Factory mitered and continuously welded or mechanically clinched and sealed watertight.

5. Gutter Supports: Heavy duty Gutter brackets, minimum thickness of .060” aluminum, with finish matching the gutters.

6. Gutter Accessories: Continuous screened leaf guard with sheet metal frame designed for high flow applications. Screen must be approved by the manufacturer for use in 3.49 in/hr 15 min duration, and 1.59 in/hr for 60 min. Material shall match the gutters in appearance and be a minimum of .024” thickness for aluminum.

B. Downspouts: Plain rectangular or corrugated rectangular complete with machine-crimped, mitered, or smooth-curve elbows, manufactured from the following exposed metal. Furnish with metal hangers, from same material as downspouts, and anchors.

1. Zinc-Coated Steel: Nominal 0.018-inch (0.45-mm) minimum thickness.

2. Formed Aluminum: 0.019 inch (0.81 mm) minimum thick.

C. Zinc-Coated Steel and/or aluminum Finish: Three-coat fluoropolymer.

1. Color: As selected by the Government from manufacturer's full range.

2.4 MATERIALS

A. Zinc-Coated (Galvanized) Steel Sheet: ASTM A653/A653M, G90 (Z275) coating designation.

B. Aluminum Sheet: ASTM B209 (ASTM B209M), alloy as standard with manufacturer for finish required, with temper to suit forming operations and performance required.

C. Stainless Steel Sheet: ASTM A240/A240M or ASTM A666, Type 304.

2.5 UNDERLAYMENT MATERIALS

A. Self-Adhering, High-Temperature Sheet: Minimum 30 to 40 mils (0.76 to 1.0 mm) thick, consisting of slip-resisting polyethylene-film top surface laminated to layer of butyl or SBS-modified asphalt adhesive, with release-paper backing; cold applied. Provide primer when recommended by underlayment manufacturer.

1. Thermal Stability: ASTM D1970/D1970M; stable after testing at 240 deg F (116 deg C).

2. Low-Temperature Flexibility: ASTM D1970/D1970M; passes after testing at minus 20 deg F (29 deg C).

2.6 MISCELLANEOUS MATERIALS

A. Fasteners: Manufacturer's recommended fasteners, suitable for application and designed to meet performance requirements. Furnish the following unless otherwise indicated:

1. Exposed Penetrating Fasteners: Gasketed screws with hex washer heads matching color of sheet metal.

ROOF SPECIALTIES 077100 - 4

2. Fasteners for Copper Sheet: Copper, hardware bronze, or passivated Series 300 stainless steel.

3. Fasteners for Aluminum: Aluminum or Series 300 stainless steel.

4. Fasteners for Stainless Steel Sheet: Series 300 stainless steel.

5. Fasteners for Zinc-Coated (Galvanized) Steel Sheet: Series 300 stainless steel or hot-dip zinc-coated steel according to ASTM A153/A153M or ASTM F2329.

B. Elastomeric Sealant: ASTM C920, elastomeric silicone polymer sealant of type, grade, class, and use classifications required by roofing-specialty manufacturer for each application.

C. Butyl Sealant: ASTM C1311, single-component, solvent-release butyl rubber sealant;

polyisobutylene plasticized; heavy bodied for hooked-type joints with limited movement.

D. Bituminous Coating: Cold-applied asphalt emulsion complying with ASTM D1187/D1187M.

E. Asphalt Roofing Cement: ASTM D4586, asbestos free, of consistency required for application.

F. Solder for Copper: ASTM B32, lead-free solder.

2.7 FINISHES

A. Coil-Coated Galvanized-Steel Sheet Finishes:

1. High-Performance Organic Finish: Prepare, pretreat, and apply coating to exposed metal surfaces to comply with ASTM A755/A755M and coating and resin manufacturers' written instructions.

a. Three-Coat Fluoropolymer: AAMA 621. Fluoropolymer finish containing not less than 70 percent polyvinylidene fluoride (PVDF) resin by weight in both color coat and clear topcoat.

B. Coil-Coated Aluminum Sheet Finishes:

1. High-Performance Organic Finish: Prepare, pretreat, and apply coating to exposed metal surfaces to comply with coating and resin manufacturers' written instructions.

a. Three-Coat Fluoropolymer: AAMA 2605. Fluoropolymer finish containing not less than 70 percent polyvinylidene fluoride (PVDF) resin by weight in both color coat and clear topcoat.

PART 3 - EXECUTION

3.1 INSTALLATION OF UNDERLAYMENT

A. Self-Adhering Sheet Underlayment: Apply primer if required by manufacturer. Comply with temperature restrictions of underlayment manufacturer for installation. Apply wrinkle free, in shingle fashion to shed water, and with end laps of not less than 6 inches (152 mm) staggered 24 inches (610 mm) between courses. Overlap side edges not less than 3-1/2 inches (90 mm).

Roll laps with roller. Cover underlayment within 14 days.

1. Apply continuously under roof-edge specialties.

ROOF SPECIALTIES 077100 - 5

2. Coordinate application of self-adhering sheet underlayment under roof specialties with requirements for continuity with adjacent air barrier materials.

3.2 INSTALLATION, GENERAL

A. Install roof specialties according to manufacturer's written instructions. Anchor roof specialties securely in place, with provisions for thermal and structural movement. Use fasteners, solder, protective coatings, separators, underlayments, sealants, and other miscellaneous items as required to complete roof-specialty systems.

1. Install roof specialties level, plumb, true to line and elevation; with limited oil-canning and without warping, jogs in alignment, buckling, or tool marks.

2. Provide uniform, neat seams with minimum exposure of solder and sealant.

3. Install roof specialties to fit substrates and to result in weathertight performance. Verify shapes and dimensions of surfaces to be covered before manufacture.

4. Torch cutting of roof specialties is not permitted.

5. Do not use graphite pencils to mark metal surfaces.

B. Metal Protection: Protect metals against galvanic action by separating dissimilar metals from contact with each other or with corrosive substrates by painting contact surfaces with bituminous coating or by other permanent separation as recommended by manufacturer.

1. Coat concealed side of uncoated aluminum and stainless steel roof specialties with bituminous coating where in contact with wood, ferrous metal, or cementitious construction.

2. Bed flanges in thick coat of asphalt roofing cement where required by manufacturers of roof specialties for waterproof performance.

C. Expansion Provisions: Allow for thermal expansion of exposed roof specialties.

1. Space movement joints at a maximum of 12 feet (3.6 m) with no joints within 18 inches (450 mm) of corners or intersections unless otherwise indicated on Drawings.

2. When ambient temperature at time of installation is between 40 and 70 deg F (4 and 21 deg C), set joint members for 50 percent movement each way. Adjust setting proportionately for installation at higher ambient temperatures.

D. Fastener Sizes: Use fasteners of sizes that penetrate wood blocking or sheathing not less than 1- 1/4 inches (32 mm) for nails and not less than 3/4 inch (19 mm) for wood screws unless otherwise specified by fastener manufacturer to achieve maximum pull-out resistance.

E. Seal concealed joints with butyl sealant as required by roofing-specialty manufacturer.

F. Seal joints as required for weathertight construction. Place sealant to be completely concealed in joint. Do not install sealants at temperatures below 40 deg F (4 deg C).

G. Soldered Joints: Clean surfaces to be soldered, removing oils and foreign matter. Pre-tin edges of sheets to be soldered to a width of 1-1/2 inches (38 mm); however, reduce pre-tinning where pre-tinned surface would show in completed Work. Tin edges of uncoated copper sheets using solder for copper. Do not use torches for soldering. Heat surfaces to receive solder and flow solder into joint. Fill joint completely. Completely remove flux and spatter from exposed surfaces.

ROOF SPECIALTIES 077100 - 6

3.3 INSTALLATION OF ROOF-EDGE SPECIALITIES

A. Install cleats, cants, and other anchoring and attachment accessories and devices with concealed fasteners.

B. Anchor roof edgings with manufacturer's required devices, fasteners, and fastener spacing to meet performance requirements.

3.4 INSTALLATION OF ROOF-EDGE DRAINAGE-SYSTEM

A. Install components to produce a complete roof-edge drainage system according to manufacturer's written instructions. Coordinate installation of roof perimeter flashing with installation of roof-edge drainage system.

B. Gutters: Join and seal gutter lengths. Allow for thermal expansion. Attach gutters to firmly anchored gutter supports spaced not more than 18 inches apart. Attach ends with rivets and seal with sealant to make watertight. Slope to downspouts.

1. Install continuous leaf guards on gutters with noncorrosive fasteners, removable or hinged to swing open for cleaning gutters.

2. Slope gutters 1” every 40’ unless otherwise recommended by the manufacturer for high volume applications.

C. Downspouts: Join sections with manufacturer's standard telescoping joints. Provide hangers with fasteners designed to hold downspouts securely to walls and 1 inch (25 mm) away from walls; locate fasteners at top and bottom and at approximately 60 inches (1500 mm) o.c.

1. Provide elbows at base of downspouts at grade to direct water away from building.

3.5 CLEANING AND PROTECTION

A. Clean exposed metal surfaces of substances that interfere with uniform oxidation and weathering.

B. Clean and neutralize flux materials. Clean off excess solder and sealants.

C. Remove temporary protective coverings and strippable films as roof specialties are installed.

END OF SECTION 077100

SNOW GUARDS 077253 - 1

SNOW GUARDS

SECTION 077253

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Snow guards for metal roofs.

2. Non-penetrating attachment system

1.2 REFERENCES

A. Aluminum Association (AA) (www.aluminum.org) - Aluminum Standards and Data, 2003 Edition.

B. ASTM International (ASTM) (www.astm.org):

1. A484/A484M-16 – Standard Specifications for General Requirements for Stainless Steel Bars, Billets, and Forgings

2. A554-16 – Standard Specification for Welded Stainless Steel Mechanical Tubing

3. A555/A555M-16 – Standard Specification for General Requirements for Stainless Steel Wire and Wire Rods

4. B85-03 - Standard Specification for Aluminum-Alloy Die Castings

5. B221-04a - Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes

6. F836M-02 (2015) – Standard Specification for Style 1 Stainless Steel Metric Nuts (Metric).

7. F880-12 – Standard Specification for Stainless Steel Socket, Square Head, and Slotted

Headless-Set Screws

1.3 SUBMITTALS

A. Action Submittal:

1. Shop Drawings: Include roof plans showing locations of snow guards on roof and attachment details and spacing, reviewed and recommended by the manufacturer.

2. Product Data:

a. Product description.

b. Construction details.

c. Material descriptions.

d. Individual component dimensions.

e. Finishes.

f. Installation instructions.

B. Informational Submittals:

1. Include calculation of number and location of snow guards based on designed roof snow load, roof slope, roof type, components, spacings and finish.

2. Test results: Results of product tensile load testing, issued by a recognized independent testing laboratory, showing ultimate load-to-failure value of attachment.

http://www.aluminum.org/ http://www.astm.org/

SNOW GUARDS 077253 - 2

C. Closeout Submittals:

1. Certification: Installer's certification that snow guard system was installed in accordance with manufacturer's instructions and approved Shop Drawings.

1.4 QUALITY ASSURANCE

A. Manufacturer Qualifications: Manufacturer to specialize in production of Snow Guard Products of the type specified with a minimum of 20 years documented experience.

B. Installer Qualifications: Installer to specialize in metal roof installation and installation of Snow

Guard Products with a minimum of 5 years documented experience.

1.5 DELIVERY, STORGE AND HANDLING

A. Deliver components to jobsite properly packaged to provide protection during transport, delivery and handling.

B. Store products in manufacturer’s original labeled and unopened packaging in a clean and dry location, protected from potential damage, until ready for application.

2.1 SYSTEM DESCRIPTION

A. Attachment system to provide attachment to standing seam metal roofs:

1. With only minor dimpling of panel seams.

2. Without penetrations through roof seams or panels.

3. Without use of sealers or adhesives.

4. Without voiding roof warranty.

B. Attachment system to provide attachment to corrugated metal roofs:

1. Bottom-Fixed, Low-Profile Metal Roof Bracket for Corrugated Roofing: Stainless-steel clamps and set screws with factory-applied, butyl sealant already in the base.

C. Performance Requirements: Provide snow guards to withstand exposure to the weather and environmental elements, and resist design forces without failure due to defective manufacture.

1. Loading: Design snow guard system to resist minimum in-service vector load as determined by the manufacturer and/or professional engineer.

2. Source Limitation: Provide snow guard system as designed and tested by the manufacturer as a complete system. Install components by the same manufacturer.

2.2 MANUFACTURER

A. Acceptable Manufacturer: S-5! Metal Roof Innovations, Ltd., 8655 Table Butte Road, Colorado Springs, CO. 80908; Tel: 888-825-3432; Fax: 719-495-0045; Email: support@s-5.com; Web:

www.s-5.com (www.S-5.com) mailto:support@s-5.com http://www.s-5.com/

SNOW GUARDS 077253 - 3

B. Substitutions: Permitted with CO approval – must meet all requirements described in these specifications.

2.3 PIPE-TYPE SNOW RETENTION SYSTEMS FOR STANDING SEAM METAL ROOFS

A. Basis of Design: DualGard, manufactured by S-5! Metal Roof Innovations, Ltd.

Manufacturers of equal quality and comparable product specifications are permitted with approval by the CO.

B. Components:

1. Seam Clamps

a. Manufactured from 6061-T6 aluminum extrusions conforming to ASTM B221 or aluminum castings conforming to ASTM B85 and to AA Aluminum Standards and Data.

b. Set screws: 300 Series stainless steel, 18-8 alloy, 3/8 inch (9.525 mm) diameter, with round nose point.

c. Attachment bolts: 300 Series stainless steel, 18-8 alloy, 8 mm diameter, hex flange bolt.

2. Corrugated Metal Roof Clamps

a. Manufactured from similar quality materials as the seam clamps and approved for use with the dual pipe snow system.

3. Pipe Brackets:

a. Manufactured from 5000 Series alloy and temper aluminum conforming to ASTM B221 and AA Aluminum Standards and Data.

4. Pipe Couplings (Splices):

a. Manufactured from 6005a-T61 Series alloy and temper aluminum extrusions conforming to ASTM B221 and AA Aluminum Standards and Data.

5. Pipes (Cross Members):

a. Manufactured 6005a-T61 Series alloy and temper aluminum extrusions conforming to ASTM B221 and AA Aluminum Standards and Data.

1) Model: DualPipe (or approved equal)

6. Pipe Collar:

a. Manufactured from 6005a-T61 Series alloy and temper aluminum extrusions conforming to ASTM b221 and AA Aluminum Standards and data, with ¼-20 x 3/8 inch (9.525 mm) stainless steel set screw.

1) Model: DualCollar (or approved equal)

7. Snow and Ice Clips:

a. Aluminum, with rubber foot, minimum 3 inches (76.2 mm) wide.

1) Model: DualClip II for standing seam heights 1 inch (25.4 mm) to 1.5 inch (38.1 mm), or approved equal.

2) Model: DualClip III for standing seam heights 1.75 inch (44.45 mm) to 3.25 inch (82.55 mm), or approved equal.

8. End Caps:

a. Rubber or metal, black or color-matched.

SNOW GUARDS 077253 - 4

PART 3- EXECUTION

3.1 EXAMINATION

A. Prior to beginning installation, verify that:

1. Panel seaming is complete.

2. Panel attachment is sufficient to withstand loads applied by snow guard system.

3. Installation will not impede roof drainage.

3.2 PREPARATION

A. Clean areas to receive attachments; remove loose and foreign matter that could interfere with installation or performance.

3.3 INSTALLATION

A. Install system in accordance with manufacturer's instructions and approved Shop Drawings.

B. Snow Retention System:

1. Pre-assemble one clamp to each pipe bracket assuring the set screws are facing the correct side of the standing seam they will be applied to. Attach clamps to pipe brackets on what will become the upslope side of the assembly. Hand tighten M8 bolt fastening clamp to pipe bracket. Pre-load set screws into clamps.

2. Insert pipes into pre-assembled upslope pipe bracket and clamp assemblies. Insert a pipe collar inside last bracket of either end of the run as pipe is inserted into brackets.

3. Place downslope clamps on standing seams at maximum 48 inches (1219 mm) on center or as required by in-service loads.

4. Place downslope clamps in straight, aligned rows using a string line.

5. Some clamps are directional. Reference installation instructions for the specific clamp used to assure they are oriented correctly.

6. Tighten downslope clamp set screws to manufacturers recommended torque. Test set screw torque using calibrated torque wrench.

7. Attach pre-assembled upslope row of clamps with attached pipe brackets and pipes aligning with downslope clamps. Tighten M8 bolt to fasten pre-assembly on downslope clamps to recommended torque of 156 inch pounds (13 foot pounds) (17.63 Newton meters).

8. Tighten upslope clamp set screws to standing seams to manufacturers recommended torque.

Test set screw torque using calibrated torque wrench. Then, tighten M8 bolt on upslope clamps to recommended torque of 156 inch pounds (13 foot pounds) (17.63 Newton meters).

9. Install pipe coupling at adjoining pipe end joints. Insert coupling halfway into pipe that will be joined to next pipe in the run.

SNOW GUARDS 077253 - 5

10. Cut extended end of pipe at end of run. Do not cantilever pipes more than 4 inches (101.6

mm) beyond last clamp and bracket at ends.

11. Apply end cap to each pipe.

12. Install one clip per panel between panel seams, if recommended by the manufacturer.

a. Secure clip to back side of cross member using stainless steel #10 x ½ inch (12.7 mm) screw.

END OF SECTION 077253

JOINT SEALANTS 079200 - 1

JOINT SEALANTS

SECTION 079200

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Silicone joint sealants.

2. Polyurethane joint sealants.

1.2 ACTION SUBMITTALS

A. Product Data: For each joint-sealant product.

1.3 PRECONSTRUCTION TESTING

A. Preconstruction Field-Adhesion Testing: Before installing sealants, field test their adhesion to project joint substrates. Test joint sealants according to Method A, Field-Applied Sealant Joint Hand Pull Tab, in Appendix XI ASTM C1193 or Method A, Tail Procedure, in ASTM C1521.

1.4 WARRANTY

A. Special Installer's Warranty: Installer agrees to repair or replace joint sealants that do not comply with performance and other requirements specified in this Section within specified warranty period.

1. Warranty Period: Two years from Final Inspection.

PART 2 - PRODUCTS

2.1 JOINT SEALANTS, GENERAL

A. Colors of Exposed Joint Sealants: To be selected at time of product submission.

2.2 SILICONE JOINT SEALANTS

A. Silicone, S, NS, 50, NT: Single-component, nonsag, plus 50 percent and minus 50 percent movement capability, nontraffic-use, neutral-curing silicone joint sealant; ASTM C920, Type S, Grade NS, Class 50, Use NT.

1. Density: 1.14 kg/l

2. Tensile Strength: 200 psi, ASTM D412

3. Elongation at break: 700%, ASTM D412

JOINT SEALANTS 079200 - 2

4. Tear propagation resistance: 30 pli, CQP045-1/ISO 34

5. Service temperature: -40 to 302 F

B. Example of an acceptable joint sealant is the Sikasil WS-395, or an approved equal that meets these specifications.

2.3 POLYURETHANE JOINT SEALANTS

A. Polyurethane, S, NS, 100/50, NT: Single-component, nonsag, plus 100% and minus 50% movement capability, nontraffic-use, neutral-curing silicone joint sealant; ASTM C920, Type S, Grade NS, Class 100/50, Use NT.

1. Tensile Strength: 50 psi, ASTM D412

2. Elongation at break: 700%, ASTM D412

3. Service temperature: -40 to 170 F

B. Example of an acceptable joint sealant is the Sikasil -15 LM, or an approved equal that meets these specifications.

2.4 MISCELLANEOUS MATERIALS

A. Primer: Material recommended by joint-sealant manufacturer where required for adhesion of sealant to joint substrates indicated, as determined from preconstruction joint-sealant-substrate tests and field tests.

B. Cleaners for Nonporous Surfaces: Chemical cleaners acceptable to manufacturers of sealants and sealant backing materials.

C. Masking Tape: Nonstaining, nonabsorbent material compatible with joint sealants and surfaces adjacent to joints.

PART 3 - EXECUTION

3.1 PREPARATION

A. Surface Cleaning of Joints: Clean out joints immediately before installing joint sealants to comply with joint-sealant manufacturer's written instructions and the following requirements:

1. Remove laitance and form-release agents from concrete.

2. Clean nonporous joint substrate surfaces with chemical cleaners or other means that do not stain, harm substrates, or leave residues capable of interfering with adhesion.

B. Joint Priming: Prime joint substrates where recommended by joint-sealant manufacturer or as indicated by preconstruction joint-sealant-substrate tests or prior experience.

JOINT SEALANTS 079200 - 3

C. Masking Tape: Use masking tape where required to prevent contact of sealant or primer with adjoining surfaces.

3.2 INSTALLATION OF JOINT SEALANTS

A. General: Comply with ASTM C1193 and joint-sealant manufacturer's written installation instructions for products and applications indicated, unless more stringent requirements apply.

B. Install sealant backings of kind indicated to support sealants during application and at position required to produce cross-sectional shapes and depths of installed sealants relative to joint widths that allow optimum sealant movement capability.

C. Install bond-breaker tape behind sealants where sealant backings are not used between sealants and backs of joints.

D. Install sealants using proven techniques that comply with the following and at the same time backings are installed:

1. Place sealants so they directly contact and fully wet joint substrates.

2. Completely fill recesses in each joint configuration.

3. Produce uniform, cross-sectional shapes and depths relative to joint widths that allow optimum sealant movement capability.

E. Tooling of Nonsag Sealants: Immediately after sealant application and before skinning or curing begins, tool sealants to form smooth, uniform beads of configuration indicated. Use tooling agents that are approved in writing by sealant manufacturer and that do not discolor sealants or adjacent surfaces.

1. Provide concave joint profile per Figure 8A in ASTM C1193 unless otherwise indicated.

3.3 FIELD QUALITY CONTROL

A. Field-Adhesion Testing: Field test joint-sealant adhesion to joint substrates as follows:

1. Extent of Testing: Test completed and cured sealant joints as follows:

a. Perform 5 tests for the first 1000 feet of joint length for each kind of sealant and joint substrate.

b. Perform one test for each 1000 feet of joint length thereafter or one test per each floor per elevation.

2. Test Method: Test joint sealants according to Method A, Field-Applied Sealant Joint Hand Pull Tab, in Appendix X1 in ASTM C1193 or Method A, Tail Procedure, in

ASTM C1521.

B. Evaluation of Field-Adhesion-Test Results: Sealants not evidencing adhesive failure from testing or noncompliance with other indicated requirements will be considered satisfactory.

Remove sealants that fail to adhere to joint substrates during testing or to comply with other

JOINT SEALANTS 079200 - 4

requirements. Retest failed applications until test results prove sealants comply with indicated…