Attachment_1_Specs.pdf

Project Specifications

For

SAN BERNARDINO NATIONAL FOREST HEADQUARTERS ROOF

REHABILITATION

San Bernardino, CA

May 29, 2015

SAN BERNARDINO NF HEADQUARTERS ROOF REHABILITATION

Table of Contents

Section Specification Page

01010 Summary of Work 3

01060 Applicable Codes and Standards 5

01400 Quality Control and Quantity Measurement 6

01502 Mobilization 7

01524 Construction Waste Management 9

01600 Use of Government Facilities 14

01700 Project Cleanup 16

07570 Fluid Applied Reinforced Roof System 17

07620 Flashing and Sheet Metal 23

07920 Joint Sealants 25

SECTION 0l0l0

SUMMARY OF THE WORK

PART 1 - GENERAL

1.1- DESCRIPTION OF WORK

A. This project requires the Contractor to be responsible for supplying all labor, materials, equipment, freight and delivery, and all necessary, valid licenses and permits required for the work described below.

B. This work consists of rehabilitation of the existing built-up roof on the San Bernardino National

Forest Headquarters Office. Rehabilitation includes: repair and preparation of the existing cap sheet, resealing of penetrations, flashing, and drains, installation of asphalt emulsion membrane, and installation of 2-ply polyester reinforced- embeded reflective acrylic surface. All work shall be in conformance with the contract drawings, specifications, and coating manufacturer recommendations.

1.2 – PROJECT LOCATION

The project site is located in the City of San Bernardino. The site address is: 602 South Tippecanoe

Avenue, San Bernardino, CA, 92408. The site is located a few miles north of interstate 10 on

Tippecanoe Avenue.

1.3 - SPECIFICATIONS AND DRAWINGS

A. The specifications establish the construction procedures and materials to be employed throughout. All work shall be completed in accordance with these specifications and project drawings.

B. Submit shop drawings for approval for all components that are in variance from that specified or shown on the drawings or that vary in dimension, slope, configuration, etc. The Government retains the right to reject any component or system that in its opinion is not fully comparable to that specified herein.

1.3 – SITE USE AND CONDITIONS

A. Refer to section 1600- Use of Government Facilities

1.4 - CONSTRUCTION SEQUENCE

A. The Contractor shall submit a proposed work schedule for approval prior to commencement of work.

PART 2 – PRODUCTS

NOT USED

PART 3 – EXECUTION

NOT USED

END OF SECTION

SECTION 01060

APPLICABLE CODES AND STANDARDS

PART 1 - GENERAL

1.01 SCOPE: This section describes the codes and standards which apply to the work in this contract.

Additional codes and standard may be cited in sections to which they apply.

1.02 CODES AND STANDARDS

A The following codes and standards shall apply to the work in this contract:

1. International Building Code (IBC), 2012 Edition

2. California Building Code, Title 24, 2013 Edition

3. National Roofing Contractors Association. (NRCA)

4. American with Disabilities Act and Architectural Barriers Act Accessibility Guidelines

(ADAABAG), July 23, 2004 Edition (available by calling United States Access Board at

800-872-2253).

5. International Conference of Building Officials (ICBO).

6. Underwriter's Laboratories, (UL).

7. Occupational Safety and Health Administration (OSHA).

B Unless otherwise specified in this contract, reference to a specific standard or specification shall mean the latest edition or amendment in affect on the date of the invitation to bid.

1.03 DEFINITIONS: Administrative Authority or Building Official, as used in the Codes and

Standards, shall be the Contracting Officer.

SECTION 01400

QUALITY CONTROL AND QUANTITY MEASUREMENT

1.01 SCOPE: This work shall consist of providing quality control in conformance with the inspection of construction provisions, of this contract to ensure compliance with the specifications and provision of the Contract. The Contractor shall provide all personnel, equipment, tests and reports necessary to meet the requirements of this specification.

1.02 COORDINATION: Where specifications, require the Contracting Officer to be present during the sampling or testing procedure to obtain approval, the Contractor shall be subject to the following conditions:

A. The Contractor shall provide 72 hours prior notice for an inspection requiring government observation for approval.

B. The Contractor shall provide 24 hours notice for cancellation.

PART 2 - EXECUTION

2.01 QUALITY CONTROL AND MEASUREMENT SYSTEMS:

A. The Contractor shall provide and maintain a quality control system that will ensure that all services, supplies and construction required under this contract conform to the contract requirements.

B. The Contractor shall also perform, or cause to be performed, all measurements of quantities of materials incorporated under the provisions of the contract.

SECTION 01502

MOBILIZATION

PART 1- GENERAL

1.1 SUMMARY OF WORK

A. The work consists of the mobilization and demobilization of the contractor's forces and equipment necessary for performing the work required under the contract. It does not include mobilization and demobilization for specific items of work for which payment is provided elsewhere in the contract. Mobilization will not be considered as work in fulfilling the contract requirements for commencement of work.

1. Mobilization shall include all activities and associated costs for transportation of contractor's personnel, equipment, and operating supplies to the site; establishment of offices, buildings, and other necessary general facilities for the contractor's operations at the site; premiums paid for performance and payment bonds including coinsurance and reinsurance agreements as applicable; and other items specified in section 4 of this specification.

2. Demobilization shall include all activities and costs for transportation of personnel, equipment, and supplies not required or included in the contract from the site. This includes the disassembly; removal; and site cleanup of offices, buildings, and other facilities assembled on the site specifically for this contract.

3. This work includes mobilization and demobilization required by the contract at the time of award. If additional mobilization and demobilization activities and costs are required during the performance of the contract as a result of changed, deleted, or added items of work for which the contractor is entitled to an adjustment in contract price, compensation for such costs will be included in the price adjustment for the item or items of work changed or added.

UNIT PRICES

A. Measurement for mobilization is on a lump sum basis.

B. Mobilization payments will be included in progress payment estimates upon written application by Contractor subject to the following provisions:

1. Authorization for payment of 50 percent of the contract price for mobilization after mobilization has taken place.

2. Authorization for payment of the remaining 50 percent of the Contract Price for mobilization will be made upon completion of Work amounting to 5 percent of the

Contract Price less the mobilization unit price.

PART 2 - PRODUCTS (not used)

PART 3 - EXECUTION (not used)

END OF SECTION 01502

SECTION 01524

CONSTRUCTION WASTE MANAGEMENT

PART 1 - GENERAL

1.1 SUMMARY

A. Section includes:

1. Special requirements for waste management during renovation construction operations.

a. Protect the environment, both on-site and off-site, during renovation and construction operations.

b. Prevent environmental pollution and damage.

c. Maximize source reduction, reuse and recycling of solid waste.

B. Related Sections:

1. 01732- Selective Site Demolition.

1.2 DEFINITIONS

A. Definitions pertaining to sustainable development: As defined in ASTM E2114.

1.3 QUALITY ASSURANCE

A. Maximize use of source reduction and recycling procedures outlined in ASTM D5834.

B. Diversion Goals: A minimum 25 percent by weight of total project solid waste to be diverted from landfill.

1.4 PRECONSTRUCTION MEETING

A. After award of Contract and prior to the commencement of the Work, schedule and conduct meeting with the Contractor and the Contracting Officer to discuss the proposed Waste

Management Plan and to develop mutual understanding relative to details of environmental protection.

1.5 SUBMITTALS

A. Solid Waste Management Plan: Not less than 10 days before the Pre-construction meeting, prepare and submit a Solid Waste Management Plan including, but not limited to, the following:

1. List of the recycling facilities, reuse facilities, municipal solid waste landfills and other disposal area(s) to be used. Include:

a. Name, location, and phone number.

b. Copy of permit or license for each facility.

2. Identify materials that cannot be recycled or reused. Provide explanation or justification.

3. Revise and resubmit Plan as required by The Contracting Officer.

a. Approval of Contractor's Plan will not relieve the Contractor of responsibility for compliance with applicable environmental regulations.

B. Progress Documentation: Document solid waste disposal and diversion. Include the quantity by weight of waste generated; waste diverted through sale, reuse, or recycling; and waste disposed by landfill or incineration. Identify landfills, recycling centers, waste processors, and other organizations that process or receive the solid waste.

1. Document on form in Appendix A of this Section, or similar form as approved by The

Contractor.

2. With each request for Payment, submit updated Documentation for solid waste disposal and diversion.

3. With each request for Payment, submit manifests, weight tickets, receipts, and invoices specifically identifying the Project and waste material.

PART 2 - PRODUCTS

PART 3 - EXECUTION

3.1 SOLID WASTE MANAGEMENT

A. Develop and implement a waste management program in accordance with ASTM E1609 and as specified herein.

B. Collection: Implement a recycling/reuse program that includes separate collection of waste materials of the following types as appropriate to the project waste and to the available recycling and reuse programs in the project area:

1. Land clearing debris.

2. Asphalt.

3. Concrete and Masonry.

4. Metal.

a. Ferrous.

b. Non-ferrous.

5. Wood, nails and staples allowed.

6. Debris.

7. Glass, colored glass allowed.

8. Paper.

a. Bond.

b. Newsprint.

c. Cardboard and paper packaging materials.

9. Plastic.

10. Gypsum.

11. Non-hazardous paint and paint cans.

12. Carpet.

13. Insulation.

14. Others as appropriate.

C. Recycling/Reuse: Maximize recycling and reuse of materials.

1. Recycling/Reuse on project site: Coordinate with The Contracting Officer.

2. Recycling/Reuse off project site: The following is a partial list for Contractor's information only. For more information, contact the State Department of Environmental

Quality and the local Integrated Solid Waste Management Office.

Habitat for Humanity, a non-profit housing organization that rehabilitates and builds housing for low-income families. Sites requiring donated materials vary. Contact the national hotline (800) HABITAT.

California Materials Exchange (CAL-MAX) Program sponsored by the California

Integrated Waste Management Board; (916) 255-2369.

D. Handling:

1. Clean materials that are contaminated prior to placing in collection containers. Deliver materials in accordance with recycling or reuse facility requirements (e.g., free of dirt, adhesives, solvents, petroleum contamination, and other substances deleterious to recycling process).

2. Arrange for collection by or delivery to the appropriate recycling or reuse facility.

Appendix A

SUMMARY OF SOLID WASTE DISPOSAL AND DIVERSION

Project Name: Project Number:

Contractor Name: License Number:

Contractor Address:

Solid Waste

Material

Date Material

Disposed/

Diverted

Amount

Disposed/

Diverted (ton or cubic yard)

Municipal Solid

Waste Facility

(name, address, & phone number

Recycling/ Reuse

Facility (name, address, & phone number

Comments (if disposed, state why not diverted)

Appliances

Asphalt

Cardboard

Concrete

Gypsum Drywall

Land Clearing/

Soil

Masonry

Metals: Ferrous

Metals: Non-ferrous

Mixed/ Co-mingled Waste

Plastic

Roofing: Asphalt-based

Salvaged/

Surplus

Materials for

Reuse

Wood:

Landclearing

Debris

Wood: Scrap

Lumber

Other

Signature: Date:

SECTION 01600

USE OF GOVERNMENT FACILITIES

PART 1 - GENERAL

1.01 SCOPE: This work consists of the use, by the Contractor, of areas and facilities owned by the

Government during the construction of this project.

PART 2 – STORAGE FACILITIES

2.01 Upon written request by the Contractor, existing fenced areas for equipment, materials storage or other needs may be desi g nated and defined on the ground. Any areas so designated may be additionally fenced by the Contractor.

2.02 The Contractor shall return the area designated for equipment and materials storage to its original condition at the completion of the project.

PART 3 – UTILITIES

3.01 The Government will make available to the Contractor, at no expense, limited use of the existing electrical and water utilities at the site. Contractor's use of this utility shall not be so high or damaging as to limit utilities for Government administrative use at the site. The Government does not ensure the adequacy of these utilities. Any delay in the Contractor's operation resulting from the interruption of these utilities, for any reason, shall not result in an expense to the Government. The Contractor is responsible for investigating site utilities, if listed as available, for use compatibility. Any extension of the utilities to the project shall be provided by the Contractor from locations approved by the Contracting

Officer.

3.02 Contractor shall provide their own telephone services.

3.03 Contractor is permitted to use existing sanitation facilities within the facility.

PART 4 – SAFETY

4.01 The contractor shall be responsible for providing for the safety and security of their employees, equipment and materials at the project site.

4.02 The Contractor shall take all reasonable precautions to ensure a safe construction area.

PART 5 - EXECUTION

5.01 All the sites are accessible by paved roads. Existing road and parking areas shall be kept open to all traffic and maintained by the Contractor in such condition that traffic will be adequately accommodated. The Contractor's operations shall at no time interfere with emergency vehicle traffic.

5.02 The Contractor shall return the area designated for equipment and materials storage to the original state at the completion of the project.

5.03 The Contractor's days of operation shall be limited to Monday through Friday. Building access will be permitted outside of normal business hours of 8:30am-4:30pm.

SECTION 01700

PROJECT CLEANUP

PART 1 - GENERAL

1.01 SCOPE: This work consists of the cleanup required during construction and the final cleanup at each jobsite. The Contractor shall, at all times during the progress of the work, keep the building and work site clear of all rubbish, material scraps, and construction debris.

PART 2 - PRODUCTS

2.01 All cleaning materials and equipment used shall be selected and employed with care to avoid scratching, marring, defacing, staining or discoloring the surfaces cleaned.

PART 3 - EXECUTION

3.01 CLEANUP DURING CONSTRUCTION

A. Cleanup shall be performed by the Contractor as required, to prevent accidents to personnel and to protect all work in-place. Construction cleanup shall consist of the removal of all dirt, trash, scrap, debris, and excess materials from any floor space or walking surface that may cause the tripping or sliding of workers, ladders, or equipment. Cleanup shall be daily.

B. All debris and unused material shall be removed from the site. All debris shall be disposed of off National Forest land in accordance with local regulations. Site shall be restored to as near its original condition as possible.

C. Burning of material is not allowed.

3.02 QUALITY OF CLEANUP: In addition to the normal "broom clean" requirements, the exposed surfaces of the following materials shall be cleaned as listed below:

A. Painted Surfaces: Remove marks, stains, fingerprints and dirt.

B. Roof. Remove dirt and debris.

C. Hardware: Clean.

SECTION 07561

FLUID APPLIED REINFORCED ROOF SYSTEM

PART 1 — GENERAL

1.01 SUMMARY

A. Provide labor, materials, equipment and supervision necessary to for the complete installation of a 2-ply polyester reinforced spray applied asphalt emulsion and elastomeric acrylic coating system as outlined in this specification to create a seamless, fully-reinforced, fully-adhered waterproof membrane over the entire existing built-up roof system.

B. The manufacturer's application instructions for each product used are considered part of these specifications and should be followed at all times.

1.02 RELATED WORK SPECIFIED ELSEWHERE

A. Flashing and Sheet Metal Section 07620 B. Joint Sealants Section 07920

1.03 QUALITY ASSURANCE

A. Contractor Qualifications: The contractor shall provide information concerning projects similar in nature to the one proposed including location and person to be contacted. Some manufacturers of fluid applied reinforced roof systems have approval programs and/or licensing methods that could be required.

B. Manufacturer Qualifications: Protective coating manufacturers shall show evidence of sufficient financial resources and manufacturing facilities to furnish materials on this project. References shall be required, sufficient project lists, warranties and code approvals shall be submitted for verification.

C. Inspections: Applicator Qualifications: The applicator shall be approved by the coating manufacturer to apply the system. Manufacturer's written verification of applicator approval is required

1.04 SUBMITTALS

A. The contractor shall provide manufacturers published data sheets or letter of certification that their products comply with the materials specified. This shall include primers and protective coatings.

B. Shop drawings on sheet metal, accessories, or other fabricated items.

C. Manufacturer’s application or installation instructions.

D. Contractor/applicator certification from protective coatings manufacturers and evidence of contractor/applicator qualification and experience. SEE SECTION 1.03A

E. A specimen copy of the applicable warranty for the project. SEE SECTION 1.03B

F. Approval and information guides for applicable local, or national codes and/or insurance acceptability, if required.

G. Safety and handling instructions for storage, handling and use of the materials to include appropriate

Materials Safety Data Sheets (MSDS).

H. Field Quality Control Procedures to be utilized by the contractor/applicator to insure proper preparation and installation of protective coatings, detail work and follow-up inspection.

1.05 MATERIALS, DELIVERY AND STORAGE

A. Materials shall be delivered in the manufacturer’s original, tightly sealed containers or unopened packages, all clearly labeled with the manufacturer’s name, product identification, safety information, and batch or lot numbers where appropriate. Where materials are covered by a referenced specification, the labels shall bear the specification number, type and class, as applicable.

B. Containers shall be stored out of the weather and direct sunshine where the temperatures are within the limits specified by the manufacturer.

C. All materials shall be stored in compliance with local fire and safety requirements.

1.06 ENVIRONMENTAL CONDITIONS

A. The fluid applied reinforced roof system should be applied when weather conditions permit proper application and drying. Application will not be permitted during inclement weather (wet, rain, snow, freeze). The temperature during application shall be a minimum of 55 degrees Fahrenheit (F) and rising. Do not attempt application when rain, inclement weather or temperatures below 40 degrees F are expected within 48 hours after application.

B. Do not apply protective coatings when there is ice, frost, surface moisture or visible dampness present on the surface to be coated. Apply protective coatings in accordance with the coatings manufacturer's application instructions.

C. Wind barriers may be used if wind conditions could affect the quality of the protective coating installation.

1.07 SEQUENCING AND SCHEDULING

There shall not be any other trades-people working on the roof when the protective coating is being installed.

1.08 WARRANTY

The contractor shall provide a manufacturer’s warranty for a minimum of ten (10) years and a five (5) year warranty on labor.

1.09 SAFETY REQUIREMENTS

A. Refer to appropriate Materials Safety Data Sheets (MSDS) for additional safety information.

B. Before starting application of protective coating, any potential sources of air entry into the building must be sealed off. These units and any other potential sources of air entry into the building must be sealed.

C. Contractor shall take proper precautions to protect owners property against damage and overspray. The use of shield boards, maskings and protective coverings shall be used as necessary.

1.10 MEASUREMENT AND PAYMENT

A. Measurement and payment will be in accordance with the contract pay item in the schedule of items and shall include all existing roof preparation, application of the new coating system, disposal of removed materials, and cleanup as required in this specification and other sections.

PART 2 — PRODUCTS

2.01 ACCEPTABLE MANUFACTURERS

A. Manufacturers: Western Colloid (phone: 800-464-8292) 2 ply polyester reinforced – embedded acrylic surface, specification SM-2P-XE, or approved equal.

2.02 MATERIALS

A. The asphalt emulsion shall be a water -based asphaltic bentonite clay emulsion for use as a water proofing compound and surface coating and shall meet the following standards:

1. ASTM D1227 - Standard Specification for Emulsified Asphalt Used as a Protective

Coating for Roofing, Type III

2. ASTM D1187 - Standard Specification for Asphalt-Base Emulsions for Use as Protective Coatings for Metal

B. Physical Properties: The asphalt emulsion shall possess the following physical characteristics

Total Solids ......................................................................... 45-50% Weight/gal. ........................................................................... 8.2-8.7 Consistency ............................................................ Brush or Spray Weatherability .................................................................... Superior Flammability ........................................... Wet film non-combustible Flame Spread ......................................... Dry film self extinguishing Flexibility @ 32º F ........................................ No cracking or flaking Heat Resist @ 212º F ......................... No sag, blistering or slipping Permeability ....................................(varies with thickness) 0.0 – 2.0 Application Temperature ......................................... Minimum 50º F Drying Time - (70ºF @ 50% relative humidity).... 12 hours firm set

2.02 ELASTOMERIC COATING

A. The elastomeric coating shall be a 100% acrylic of premium quality and high durability.

B. The elastomeric coating shall meet ASTM D6083-97a and possess the following performance characteristics:

Base ................................................100% Acrylic Color....................................... ……………White Solar Reflectivity..............................(Initial) 84% ASTM C1549 Thermal Emittance...........................(Initial) 89% ASTM C1371 SRI (Solar Reflectance Index) 106 ASTM E1980-01 SRI (Solar Reflectance Index) Aged 93 ASTM E1980-01 Flammability ......................Wet: Non-flammable Dry: Class A U.L. 790 Dry: Class A ASTM E108 Elongation .................................. (initial) >250% ASTM D2370 (after weathering) >175% ASTM D2370 Tensile Strength................................... >250 psi ASTM D2370 1000 hr Xenon Arc UV Exposure ..............Pass ASTM D4798 Permeance....................................................<15 ASTM D1653 Wet Adhesion (pli) (Emulsi n)...................>10 ASTM D903 Dry Adhesion (pli) (Emulsion) ...................>17 ASTM D903

Tear Resistance .................................. >100 lbf/in ASTM D624 Low Temperature Flexibility ........... Pass 15ºF ½” ASTM D522 Solids ......................................... 53% by volume ASTM D2697 Solids .......................................... 66% by weight ASTM D1644 Water Swelling ........................................... <20% ASTM D471 Fungi Resistance ..................................no growth ASTM G21

Dirt Pick-Up Resistance ............................................ Very Good

Weight Per Gallon ...........................Approximately 11.5 - 12 lbs.

Consistency....Heavy paint, for heavy duty spray, brush or roller

Viscosity ............................................ 100-110 (KU) ASTM D562

Application Temperature......Min. 50º F Max. 100 ºF (ambient)

Drying Time ............(70ºF @ 50% r.h.) @100 sq.ft./gal. = 1 hour

2.03 ACCESSORIES AND MISCELLANEOUS MATERIALS

A. Flashings and waterproof coverings for expansion joints shall be compatible with specified polyurethane foam and elastomeric coating system and shall be as recommended by the manufacturers of the systems specified.

B. Miscellaneous materials such as adhesives, elastic cement, elastomeric caulking compounds, metal, vents and drains shall be a composite part of the roof system and shall be those recommended by the systems manufacturer.

C. Polyester Fabric: Shall be the weight and type specified by the coating manufacturer.

D. Granules: Shall be of the size and type and applied in the topcoat as recommended by the coating manufacturer.

E. Walkway coating: Shall be as specified by the coating manufacturer.

F. Board stock: If required over metal decks, fasten to achieve necessary wind uplift requirements.

PART 3 — EXECUTION

3.01 GENERAL

A. Guidelines as outlined by the manufacturer issuing the warranty shall be the final specification authority.

B. Protect surfaces near roofing operations from spray or roofing materials.

3.02 PREPARATION:

A. Roof membrane shall be repaired and made sound and watertight prior to application of the fluid applied reinforced roofing membrane using one or more of the following steps.

B. Remove all loose gravel, dirt, dust and foreign debris by vacuum, washing, sweeping or power blower. The entire surface shall be properly cleaned so as to receive proper attachment of the new fluid applied membrane.

Areas of light dirt and dust may require only sweeping or power blowing. Areas of heavier dirt, dried mud or contamination may require washing. Use strongest cleaning method necessary to achieve best results.

C. Valleys and ponding areas shall be washed and may require priming so as to receive a positive attachment of the system. If priming is necessary to any area, use asphalt emulsion diluted 20 to 30 percent with water as primer. Apply vigorously with brush and allow to dry. Valley and ponding areas shall receive an extra ply of polyester set in asphalt emulsion prior to the application of the membrane.

D. All blisters are to be repaired using the “floating patch” (or other approved) method with asphalt flashing compound and modified cap sheet. Remove blisters with flat shovel, scraper or knife. Embed modified cap sheet in application of asphalt flashing compound. Apply pressure to smooth and achieve complete contact of sheet and flashing compound. Edges of sheet shall extend at least 6 inches beyond widest point of blister being repaired.

E. Large splits are to be repaired using asphalt flashing compound and modified cap sheet. Embed modified cap sheet in application of asphalt flashing compound Apply pressure to smooth and achieve complete contact of sheet and flashing compound. Edges of sheet shall extend at least 6 inches beyond widest point of split being repaired. Peel & Stick modified cap or APP torch applied may also be used for repairs.

F. Repair and dress roof area as needed with special attention to penetrations, pipes, terminations and flashings.

G. Small splits and irregularities are to be repaired using a three course method with Elastic Cement. To the area needing repair apply cement at a rate of 5 gallons per 100 sq. ft.(aprox. 1/8 in. thick). Into the wet cement embed 1 ply of polyester fabric. Brush the fabric into the cement to insure full saturation having no wrinkles or voids. Over the fabric apply another coat of cement at a rate of 4 gal. per 100 sq.ft.. Allow to dry.

3.03 APPLICATION

A. Base and Wall Flashings: Prior to the application of the membrane, install the base and wall flashings. First install the base flashing over the cant strip using one ply of 6” (or wider if needed) Polyester Fabric set into a coat of 5 gallons per 100 sq.ft. of Asphalt Emulsion achieving full embedment, terminating at least 2” above the cant and extending onto the deck at least 2”. Next install the wall flashing using one full ply of Polyester Fabric set into a coat of 5 gallons per 100 sq.ft. of Asphalt Emulsion achieving full embedment and continuing up the wall to terminate as necessary under counter flashing, reglet or wall cap flashing per coating manufacturer details. Wall flashing shall extend out onto the deck at least 3” beyond the termination of the base flashing.

B. Edge Flashings: Remove and replace gravel stops and metal edge where necessary. Where gravel stop is replaced, replace with low or no rise metal edge. Metal edge shall be nailed at 4" O.C.. Strip-in the metal with polyester fabric and Elastic Cement making sure to cover all nails. Where edge flashing is left in place, cut back roofing 2 inches from rise and strip-in with polyester fabric and Elastic Cement to provide for a positive attachment of the metal edge to the new membrane per coating manufacturer details.

C. Vent and Pipe Flashings: If flange is removed and replaced or new flange is installed, set flange of metal "jack" in a bed of All Weather Elastic Cement and attach with nails. Strip-in the metal with polyester fabric and Elastic Cement making sure to cover all nails. See subsection G. for sealing of the cone and pipe after installation of the membrane.

The new membrane shall terminate at base of the cone.

D. Roof Drains (clamping type): Prior to the application of the roofing membrane, remove clamping ring and clean as necessary. Clean all existing build-up of mastics and repair compounds from around the drain and sump. Three course using Elastic Cement or All Weather Elastic Cement the entire drain sump area and extend into the drain bowl and extending a minimum of 18" from center of drain onto the deck (or as necessary to extend beyond drain sump). Allow to dry. Replace clamping ring. The roofing membrane system shall be applied overlapping onto the reinforced Elastic Cement at least 3”. The drain area will also receive an application of polyester reinforced elastomeric coating per subsection H.

E. Misc. Flashings: Where sign anchors, equipment supports or other projections penetrate the roof membrane, seal with Elastic Cement creating a "cone" shaped seal. Where large voids must be bridged use 1 ply of polyester fabric in the elastic cement. Misc. flashings to be Elastic Cement and Polyester Fabric and to be constructed in a manner acceptable to the membrane manufacturer as necessary to meet the needs of each flashing detail.

F. Membrane: Over the properly prepared surface, apply a coat of Asphalt Emulsion at a rate of 6 gallons per 100 sq.ft.. Immediately following and starting at the low edge of the roof, embed a 1/2 width of polyester felt continuing up the roof with full width sheets. Over the first ply of polyester felt apply a second coat of Asphalt Emulsion at the rate of 6 gallons per 100 sq.ft.. Immediately following and starting at the low edge of the roof, embed a full width second ply of polyester felt. Lightly broom each ply of polyester felt to achieve full saturation having no wrinkles or voids. Polyester shall terminate 2 inches above cant. Do Not walk on the polyester during application while emulsion is still wet causing displacement of the Asphalt Emulsion. Do not apply a top coat of Asphalt Emulsion to the polyester. Allow to cure.

G. Pipe Flashings & Penetrations – Surface Treatment: After the application of the membrane and before the reflective coating, apply Elastic Cement and Polyester Fabric in a three course method to all pipe flashings, cones, exposed metal joints and flanges. Also apply Elastic Cement to all corners at curbs and skylight flashings or any area that has been previously repaired with roofing mastic.

H. Drains & Special Areas of Ponding: Areas around drains and scuppers shall receive an extra ply of polyester fabric set in elastomeric coating. In addition valleys, waterways and any locations where water ponds for more than 48 hours shall receive an extra ply of polyester fabric set in elastomeric coating. The extra ply is to extend 12 inches beyond the ponding area or as needed to extend beyond the drain sump. To this area set 1 ply of polyester into a 3 gallon per 100 sq. ft. application of elastomeric coating and broom lightly to achieve full saturation having no wrinkles or voids. This application shall be applied after the roof membrane and prior to the final coatings of elastomeric coating.

I. Reflective Coating: After roof has been properly prepared apply reflective elastomeric coating. To prevent damage to the membrane, the reflective coating should be applied early in the day prior to the heating and softening of the emulsion surface. If surface becomes soft and sticks to equipment or feet, discontinue application. Wash roof surface to remove any asphaltic residue that may cause lack of adhesion or “tobacco staining”. Apply over the entire roof surface, a first coat of reflective elastomeric roof coating at a rate of 1½ gallons per 100 sq. ft. and allow to dry for

24 hours. Over the first coat apply a second (final) coat of reflective elastomeric coating at a rate of 1½ gallons per

100 sq. ft.. This shall be done in a "cross hatch" manner (each coat shall be at a right angle to the previous). Before application, mix well and strain if spray applying. Do not thin or dilute.

J. Seamless Walkway Coating: Apply Seamless Walkway Coating on all existing walk pads. Using short nap or smooth roller, apply to the properly prepared surface at the rate of 2 gallons per 100 sq. ft.. After first coat has dried

(at least 24 hrs.) apply a second coat and the rate of 2 gallons per 100 sq. Ft.. It may be desirable to apply at a right angle to the first application to achieve a more desirable surface pattern. Apply a reinforcing layer of polyester fabric in the wet coating in all areas where increased resistance to puncture and membrane damage such as roof doors and hatches and equipment service doors. Apply the reinforced layer prior to the application of the finish coat described above.

K. Roof Surface Mounted Conduits: Install new redwood locking with SBS mineral surfaced padding five feet on center after installing new elastomeric coating.

L. Cleanup: Each day, remove from the job site, debris, scraps, containers and any rubbish resulting from the installation of the roofing system.

END OF SECTION 07561

SECTION 07620

FLASHING AND SHEET METAL

1.01 SCOPE: This work consists of furnishing and installing flashing and sheet metal to replace any necessary edge and roof-penetration flashing sheet metal and accessories necessary to ensure a sound roof system.

1.02 SUBMITTALS: Submit shop drawings of sheet metals flashings and trims and color chart for selection.

PART 2 - PRODUCTS

2.01 SHEET METAL FLASHING AND TRIM MATERIALS: Zinc-Coated Sheet Steel shall be

0.0359-inch thick (20 gage) except as otherwise indicated, commercial quality with 0.20 percent copper conforming to ASTM A 526 and ASTM A 527 for lock-forming. The sheet metal shall be hot-dip galvanized in accordance with G90 and mill phosphatized where indicated for painting;.

2.02 MISCELLANEOUS MATERIALS AND ACCESSORIES:

A. Solder: For use with steel or copper, provide 50 - 50 tin/lead solder (ASTM B 32), with rosin flux.

B. Fasteners: Same metal as flashing/sheet metal or other non-corrosive metal as recommended by sheet manufacturer. Match finish of exposed heads with material being fastened.

C. Elastomeric Sealant: Generic type recommended by manufacturer of metal and fabricator of components being sealed and complying with requirements for joint sealants as specified in

Division 7 Section "Joint Sealers."

D. Adhesives: Type recommended by flashing sheet manufacturer for waterproof/weather-resistant seaming and adhesive application of flashing sheet.

E. Paper Slip Sheet: 5-lb. rosin-sized building paper.

F. Metal Accessories: Provide sheet metal clips, straps, anchoring devices, and similar accessory units as required for installation of work, matching or compatible with material being installed, noncorrosive, size and gage required for performance.

G. Elastic Flashing Filler: Closed-cell polyethylene or other soft closed-cell material recommended by elastic flashing manufacturer as filler under flashing loops to ensure movement with minimum stress on flashing sheet.

PART 3 - EXECUTION

3.01 INSTALLATION REQUIREMENTS

A. General: Except as otherwise indicated, comply with manufacturer's installation instructions and recommendations and with SMACNA "Architectural Sheet Metal Manual." Anchor units of work securely in place by methods indicated, providing for thermal expansion of metal units; conceal fasteners where possible, and set units true to line and level as indicated.

Install work with laps, joints, and seams that will be permanently watertight and weatherproof.

B. Bed flanges of work in a thick coat of bituminous roofing cement where required for waterproof performance.

3.02 CLEANING AND PROTECTION: Clean exposed metal surfaces, removing substances that might cause corrosion of metal or deterioration of finishes.

SECTION 07920

JOINT SEALANTS

1.01 SUMMARY: This Section includes joint sealants for flashing and sheet metal for re-roofing.

1.02 PERFORMANCE REQUIREMENTS: Provide elastomeric joint sealants that establish and maintain watertight and airtight continuous joint seals without staining or deteriorating joint substrates.

1.03 SUBMITTALS: Submit copies of product data and all manufacturers' instructions for the particular materials to be used for approval prior to installation.

1.04 PROJECT CONDITIONS: Do not proceed with installation of joint sealants under the following conditions:

A. When ambient and substrate temperature conditions are outside limits permitted by joint-sealant manufacturer.

B. When joint substrates are wet.

C. Where joint widths are less than those allowed by joint-sealant manufacturer for applications indicated.

D. Contaminants capable of interfering with adhesion have not yet been removed from joint substrates.

PART 2 – PRODUCTS

2.02 ELASTOMERIC JOINT SEALANTS: Elastomeric joint sealants shall comply with ASTM C

920 and other requirements indicated for each liquid-applied chemically curing sealant specified, including those referencing ASTM C 920 classifications for type, grade, class, and uses related to exposure and joint substrates.

PART 3 – EXECUTION

3.01 EXAMINATION:

A. Examine joints indicated to receive joint sealants for compliance with requirements for joint configuration, installation tolerances, and other conditions affecting joint-sealant performance.

B. Proceed with installation only after unsatisfactory conditions have been corrected.

3.02 PREPARATION: Clean out joints immediately before installing joint sealants to comply with joint-sealant manufacturer's written instructions and remove all foreign material from joint substrates that could interfere with adhesion of joint sealant.

3.03 INSTALLATION OF JOINT SEALANTS:

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

B. Sealant Installation Standard: Comply with recommendations in ASTM C 1193 for use of joint sealants as applicable to materials, applications, and conditions indicated.

3.04 CLEANING: Clean off excess sealant or sealant smears adjacent to joints as the Work progresses by methods and with cleaning materials approved in writing by manufacturers of joint sealants and of products in which joints occur.

3.05 PROTECTION: Protect joint sealants during and after curing period from contact with contaminating substances and from damage resulting from construction operations or other causes so sealants are without deterioration or damage at time of Substantial Completion. If, despite such protection, damage or deterioration occurs, cut out and remove damaged or deteriorated joint sealants immediately so installations with repaired areas are indistinguishable from original work.