Attachment 8 -Specs 07536 Roofing EPDM 20100105.pdf

Reroof Ballasted EPDM Specification 07536

Part 1- GENERAL

A. SPECIAL SITE INFORMAITON:

1. The replacement shall consist of removing the existing built-up roof and replacing with similar or better materials.

2. The purpose of the repair is to extend the useful life of the existing building.

3. The roof consists of four basic sections with a total area of approximately 18522 sf.; as shown on the attached historical drawings for reference only. Drawing work notes are for the historical project and only provided for information only.

a. North section is approx. 63’ x 61’ (3843 sf.)

b. East section is approx. 100’ x 63’ (6300 sf.)

c. South section is approx. 63’ x 61’ (3843 sf.)

d. Central High section is approx. 72’ x 63’ (4536 sf.)

B. QUALITY ASSURANCE:

1. Contractor’s Qualifications:

Roofing and Related Work: A firm regularly doing business of this type with not less than three years of successful experience in removal and reroofing structures similar in size, materials and complexity to those of this project.

C. PROTECTION:

1. The Contractor shall provide all necessary signs, warning lights, barricades, and take all necessary precautionary measures to protect his/her workers, the Government’s personnel, the public, and all other persons from harm during the course of construction. The Contractor shall also protect the building, the contents of the building, the site, and adjacent sites from damage during the course of this contract.

2. The building shall be kept locked at all times when Government personnel are not on the site and only authorized personnel, as approved by the COR shall be allowed to enter the building.

3. During the course of construction, the Contractor shall provide all necessary temporary coverings, and take all steps necessary to prevent water, construction and roofing materials, debris from removal of existing roof, and weather related elements from entering the building. The Contractor shall provide all necessary temporary coverings, and take all steps necessary to prevent damage to Government and personal properties from the sandblasting and painting operations.

4. The Contractor shall provide the necessary signs, perimeter barriers, warning lights, and all other necessary precautions to protect his/her vehicles, government owned vehicles and equipment, and all public vehicles from overspray and any excess application or the removal of existing roofing materials. The Contractor shall also protect the building, the site, and any adjacent buildings and sites from overspray and excess application of any materials used in removal and reroofing the building.

D. SUPERVISION:

1. During the entire course of construction, the Contractor shall have at the work site a full time Superintendent, fully qualified to supervise the work. All members of the crew shall be fully trained and experienced in this type of construction.

2. A complete set of specifications and drawings shall be retained at the site at all times for reference to the requirements for this project.

E. EGRESS:

The Contractor shall coordinate with the COR prior to commencement of work and shall agree on an area for storage of materials and access to the site. Contractor shall prevent as far as possible any damage to lawns, shrubbery, trees, walks, drives, etc., adjacent to the building, limiting vehicle traffic to the minimum. Cracked or broken concrete walks, drives, etc. damaged during the course of construction shall be repaired to original condition at no cost to the Government. The Contractor shall not block Government personnel and emergency vehicles access to the Government buildings or roadway.

F. DELIVERY AND STORAGE:

1. Deliver materials to the job site in original, new and unopened packages and containers bearing manufacturer’s name and label, and the following information:

Name or Title of Material Federal Spec. Number (if applicable) Manufacturer’s Stock number; Date of Manufacturer Manufacturer’s Name Contents by Volume for Major Pigment and Vehicle Constituents Thinning Instructions Application Instructions Color Name and Number

2. Materials shall be stored in a neat, safe manner so as not to exceed allowable live load of the storage area and out of the weather and protect from freezing in a clean dry area. If there are no available storage areas or sites on Government property, it shall be the Contractor’s responsibilities to provide his/her own storage off site.

a. Do not install materials that have become wet or contaminated with dirt, chemicals, frost or other weather elements.

b. Keep storage area neat and orderly. Remove oily rags and waste daily. Take all precautions to ensure that workers and work areas are adequately protected from fire hazards and health hazards resulting from handling, mixing, and application of all roofing and insulation materials.

G. JOB CONDITIONS:

Follow Roofing Material Manufacturer’s instructions concerning allowable temperature conditions, humidity levels, and application requirements, unless indicated otherwise in these specifications.

PART 2- REMOVAL OF EXISTING ROOFING

A. GENERAL:

1. Remove the existing roofing and insulation to the top of the existing roof deck.

2. No more of the existing roof shall be removed in one day than can be completely covered with weatherproof membrane on the same day. Provide temporary protection at exposed edges to maintain dry conditions.

3. Remove all existing flashings for soil and vent pipes, roof curbs, etc. All flashings shall be replaced with new.

4. Clean Up: After the removal of existing roofing materials, the pavement, interior building area, and surrounding area shall be cleaned of debris and roofing material.

PART 3- INSULATION

1. Furnish and install insulation of the types and sizes indicated.

2. Submit shop drawings, including manufacturer’s data, sizes, thicknesses and quantities.

3. Submit material safety data sheets for all insulation materials.

B. PRODUCTS:

General: Perform preparation and installation in accordance with insulation manufacturer’s instructions and as herein specified.

Roof insulation: Expanded polystyrene insulation, conforming to Federal Specification HH-I-524C and ASTM C578-83. Provide 1½” minimum edge thickness, ¼”:12” slope unless otherwise noted. Roof insulation system shall be approved by membrane roofing manufacturer for compatibility with membrane roof system.

C. EXECUTION:

1. Installer must examine areas and conditions under which insulation work is to be applied and notify COR in writing of conditions detrimental to proper and timely completion of the work. Do not proceed with the work until unsatisfactory conditions have been corrected in a manner acceptable to Installer.

2. Work will be construed as Contractor’s acceptance of conditions within any particular area.

PART 4- MEMBRANE ROOFING

1. Work shall include, but not necessarily be limited to, furnishing and installing single ply roofing system.

2. Roofing Contractor shall be currently approved by manufacturer or selected roofing system. Roofing contractor shall submit certification from roofing manufacturer showing approval and intent to warranty the contractor’s work.

3. Installation of roofing shall be by competent and skilled roofer, completely familiar with products and manufacturer’s currently recommended methods of installation.

4. The Contractor shall submit to the owner for approval a plan drawing showing the configuration of the membrane layout, seam locations, and a statement regarding the phasing of the work. No work shall commence until approval of this information has been received. In addition, the Owner shall be notified at least 48 hours in advance of the commencement of the work.

5. Unless otherwise detailed in the accompanying drawings, the General Tire ACR standard details will serve as the approved details for this project. Approved alternative systems may have different details required by the manufacturer for warranty. Such alternative details must be approved by the Owner.

6. All roofing shall carry a 20-year manufacturer’s materials and installation guarantee.

Guarantees issued by the contractors, marketing companies, or any other party than the manufacturer will not be accepted. Manufacturers without substantial assets to back up the guarantee will likewise not be considered. The Owner reserves the right to review all guarantees and to be furnished with the pertinent financial information by the manufacturer. Only assets located in the United States will be considered meaningful to the guarantee. Any foreign manufacturer must be licensed to do business in Kansas.

7. Submit material safety data sheets for all roofing products and accessories.

1. Furnish and install single-ply membrane roofing system as manufactured by GTR Building products Division of the General Tire and Rubber Company or an approved equal.

2. The single-ply roofing system shall be the Genflex ACR Ballasted Roof System or an approved equal.

3. The following manufacturers have similar single-ply roofing systems that may be submitted for consideration as approved equal:

a. Carlisle Tire and Rubber Co.

b. Goodyear Tire and Robber Co.

c. Johns-Manville Corporation

4. The roof covering assembly shall meet the following requirements:

a. Class A or B, when tested in accordance with UBC Standard No. 32-7.

b. UBS Standard No. 17-4.

5. All details relating to the installation of the roof system shall be approved by the roofing contractor and the manufacturer and installed in such a manner that the manufacturer will furnish its 20-year warranty for the installation.

6. Membrane shall be no less than 0.45” thick EPDM (ethylene propylene diene monomer) compounded elastomer.

7. Membrane sheet size shall be 40’ x 100’ or the largest sheet possible as determined by job condition.

8. All accessories shall be as furnished by the manufacturer.

9. Existing ballast shall be saved and reused, with additional quantities added if needed.

Existing ballast meets the following specifications: smooth ¾” minimum to 1 ½” well rounded washed river gravel at the minimum rate of 1000 lbs/100 square feet.

1. Refer to installation of insulation system.

2. Do not use oil base or plastic roof cement in conjunction with single-ply materials.

3. Splicing and bonding surfaces must be dry.

4. Once during installation and once upon completion of the installation, an inspection shall be made by a representative of the GTR Building Products Division of the General Tire and Rubber Company to ascertain that the roofing system has been installed according to the manufacturer’s published specifications and details. Inspector shall be an employee of the manufacturer and not of the contractor, distributor, or manufacturer’s agent.

5. Roofing system shall be applied by a roofing contractor approved by the manufacturer.

After inspection and acceptance, the 20-year warranty will be issued by the manufacturer.

PART 5- FLASHING AND SHEET METAL

1. The types of work specified in this section include the following:

a. Metal wall flashing and expansion joints.

b. Gutters and downspouts.

c. Miscellaneous sheet metal accessories including flashing for ductwork and ductwork supports, edge flashing, overflow trench flashing, curb flashing, roof scuttle flashing, and plumbing vents.

2. Submittals:

a. Product data: Submit manufacturer’s product specifications, installation instructions and general recommendations for each specified sheet material and fabricated product.

b. Samples: Submit two 8” square samples of specified sheet materials to be exposed as finished surfaces. Submit two 12” long, completely finished units of specified factory-fabricated products exposed as finished work. Color to be approved by Owner.

3. Shop Drawings: Submit shop drawings showing layout, joining, profiles and anchorages of fabricated work including major counter flashings, trim/fascia units, gutters, downspouts, scuppers and expansion joint systems; layouts at 1/8” scale, details at 3” scale.

4. Coordinate work of this section with interfacing and adjoining work for proper sequencing of each installation. Insure best possible weather resistance and durability of the work and protection of materials and finishes.

1. Fascia closure and reglets: Prefinished 0.032” (min.) rigid aluminum coated with Kynar 500 finish to match existing fascia, shapes shown in the drawings.

a. Shop-fabricate work to the greatest extent possible. Comply with details shown, and with applicable portions of SMACNA “Architectural Sheet Metal Manual”.

Fabricate for waterproof and weather-resistant performance; with expansion provisions for running work, sufficient to permanently prevent leakage, damage or deterioration of the work. Form work to fit substrates. Comply with material manufacturer instructions and recommendations. Form exposed sheet metal and tool marks, true to line and levels as indicated, with exposed edges folded back to form hems.

b. Separations: Provide for separating of metal from noncompatible metal or corrosive substrates by coating concealed surfaces at locations of contact, with bituminous coating or other permanent separation as recommended by manufacturer/fabricator.

2. Expansion joint system shall be MM Systems Series RX-W 1-1 or approved equal.

Frames to be extruded aluminum 6063-T5 alloy; covers 6063-T5 or formed aluminum of 5052-H32 alloy. Finish shall be standard mill. All transitions to be shop fabricated in compatible alloys and finishes. MM Systems Corporation (tel. 866-506-6929; fax 706- 824-7501).

3. Miscellaneous Materials and Accessories:

a. Fasteners: Same metal as flashing/sheet metal or other noncorrosive metal as recommended by sheet manufacturer. Match finish of exposed heads with material being fastened.

b. Mastic Sealant: Polyisobutylene; non-hardening, nonskinning, nondrying, nonmigrating sealant such as Vulkem, Tremproof or equivalent.

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

d. Paper Slip Sheet: 5 pound rosin sized building paper.

e. Polyethylene Underlayment: 6-mil carbonated polyethylene film; FS L-P-512.

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 ebing 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.

h. Roofing Cement: ASTM D2822, asphaltic.

1. Installation Requirement:

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, 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 which will be permanently watertight and weatherproof.

b. Underlayment: Where stainless steel or aluminum is to be installed directly on cementitious or wood substrates, install a course of paper slip sheet and a course of polyethylene underlayment.

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

2. Cleaning and Protection:

a. Clean exposed metal surfaces, removing substances which might cause corrosion of metal or deterioration of finishes.

b. Protection: Installer shall advise Contractor of required procedures for surveillance and protection of flashings and sheet metal work during construction, to ensure that work will be without damage or deterioration, other than natural weathering, at time of substantial completion.

PART 6- ROOF SCUTTLE

Existing roof scuttle shall be used and new roof materials shall be finished up to the existing scuttle with all-weather, water-proof seals.

PART 7- ROOF DRAINS

Contractor shall inspect existing roof drain domes and replace any damaged or broken domes with new compatible dome. Plastic domes will not be allowed.