Project Specifications Roof Repair Maint Bldg May 26-2020.pdf

July 24, PROJECT MANUAL

Urgent Roof Repair Of Maintenance

Building

Hopewell Furnace National Historic Site

HOFU PMIS No. -

CONSTRUCTION DOCUMENT

SUBMISSION SPECIFICATIONS

NATIONAL PARK SERVICE

Prepared by NER/PFCA/HACE:

Historic Architecture, Conservation, and Planning

May 26, 2020

Mailing Address:

Hopewell Furnace National Historic Site

2 Mark Bird Lane Elverson, PA 19520

To review general information about

Hopewell Furnace National Historic Site

Telephone: 610-582-8773

Please visit website:

www.nps.gov/hofu/index.htm http://www.nps.gov/hofu/index.htm

TABLE OF CONTENTS

DIVISION 1- GENERAL REQUIREMENTS

011110 Summary of Work

DIVISION 2 – SITE WORK

024119 Selective Demolition

DIVISION 6 – WOOD & PLASTICS

061000 Rough Carpentry

DIVISION 7- THERMAL & MOISTURE PROTECTION

075423 Membrane Roofing System - TPO 076000 Flashing and Sheet Metal

LIST OF DRAWINGS

All Drawings listed are part of the Project Manual and shall not be issued separately. It is the responsibility of the Offeror to verify that the Project Manual is complete as listed.

A1 – Partial Roof Plan A2 – Sections and Notes A3 - Details

REFERENCES

Submittals of Roofing System Project of 2014 - Attachments Letter of Roof Assembly, dated: September 23, 2014 Contractor: Ocean Construction LLC; Contract No: P14PY00002 Sub-Contractor/Supplier: Boardwalk Construction Roof Type: TPO Back Fleece Single Membrane Adhered Roofing System Compliance shall be met with current roofing warranty: 30-year warranty roofing system

Manufacturer: Versico, a division of Carlisle Construction Materials Incorporated

Letter of Warranty, date of installation completed: 12/2/2014

Transmittal from contractor, dated: 5/8/2015

For Reference & Information only:

As-built Drawings, dated: 8/1957; HOFU_376_3023 As Built.pdf NOTE: Contractor shall verify existing conditions e

HOFU-FY20 4

SECTION 011110 - SUMMARY OF WORK

PART 1: GENERAL

1.1 DESCRIPTION

A. The work of this contract consists of the removal and disposal of existing single membrane roofing system and related components in the selected areas of roof of Maintenance building located at Hopewell Furnace National Historic Site in Elverson, PA. Work involves installation of new single TPO Versa Fleece membrane roofing system of 30-year warranty to match and align with existing roofing system in kind. New roof shall be watertight and jointly sealed to existing roofing system. Components of new TPO membrane roofing system shall conform as specified in existing TPO Versa Fleece roofing system with 30 year warranty. The work includes, but it is not limited to all materials, labor, equipment, tools, supervision and accidentals necessary to complete the work of this contract.

B. All work shall be performed under a single contract

C. The Work shall be carried out as specified herein and as required by field conditions and applicable regulatory requirements. In general the Work consists of, but may not be limited to, the following:

1. Prior to commencement of verify existing conditions and coordinate with CO methods of construction procedures regarding this project.

2. Prior to commencement of removal work: replace existing shoring with proper shoring and temporary supports of existing roof and structures to secure existing roof system and allow construction work. Remove shoring and temporary supports after completion of project.

3. Provide temporary protection at boundary of work area to separate from adjacent areas.

Remove upon completion of project

D. DEMOLITION: Removal and disposal of roofing and related materials in selected areas.

a) Remove existing wood deck and related roofing materials where indicated in drawings.

b) Remove existing affected fascia, flashing, ridge cap, and related components.

c) Remove and salvage existing gutter and downspout for re-installation.

d) Remove and salvage from ceiling all existing light fixtures, conduits, utilities, door openers, related accessories, etc. affected by construction work. Re-install salvaged items and ensure items function properly. Coordinate with CO.

e) Relocate existing items causing obstruction in work area to allow roof work. Re-install moved items to existing location.

E. The repair work of this project consists to provide and install new VersiFleece TPO adhered single membrane roofing system to match and align with existing roofing system of 30 year warranty, including, but not limited to the following:

a) Where indicated in drawings, install new roofing single membrane VersiFleece TPO roofing system, adhered, tapered insulation, and related components in conformance to 30 year warranty. Refer to attached warranty of existing roofing system.

b) Install exterior plywood over new wood deck, match and align in kind with existing. New wood deck to match original historic wood deck. Ensure that new single membrane roofing is installed over sound plywood and wood deck subs structure

HOFU-FY20 5

c) Install and provide sealed watertight tie-in of new and existing TPO roofing membrane systems.

d) Re-install salvaged gutter, downspout and related accessories in good condition in existing location. Align with adjacent gutter and downspout to slope properly for water drainage.

e) Maintain clean interior areas affected from debris from ceiling due to roof work of this project.

f) Contractor shall coordinate with CO the work schedule pertaining to this project.

F. Special Pre-Bid Requirements: It is strongly recommended that each bidder visits the site and fully acquaints himself/herself with the problems and conditions he/she will encounter if he/she becomes the successful bidder. Since absence from visiting the project will not be considered as an excuse for misunderstanding of the requirement of the contract, bidders are STRONGLY encouraged to visit the park.

G. Permits: The contractor shall give all requisite notices, obtain and pay for all permits. He shall pay all deposits and fees for the installation of the work specified herein, and contained in the drawings if they are necessary.

1 .2 WORK LOCATION AND DURATION:

A. Location: the location of this work is at the Hopewell Furnace National Historic Site:

Maintenance Building; 2 Mark Bird Lane; Elverson, PA 19520

B. Construction Duration: The Contractor shall commence this contract within (10) ten days after the receipt of notification to proceed. Contractor shall provide (90) ninety calendar days for completion of construction. He shall prosecute the work with faithfulness and energy and in a neat and orderly manner so as to complete the work under this contract within (90) ninety calendar days after the date of receipt of notification to proceed after design. The above interval of (90 ninety calendar days is hereby agreed upon as the time necessary for completion of the entire project under this contract.

C. Pre-Construction Conference: Before work begins, the Contracting Officer will arrange for a meeting with the Contractor to discuss the work in general including administrative matters, National Park Service, questions the Contractor may have, and points that need to be resolved before the work commences.

D. Contractor will be permitted to work Monday through Friday, 7:30 A.M. to 4:00 P.M. No holiday, weekend or hourly work will be permitted without prior approval of the Contracting Officer. Contractor shall notify the Contracting Officer-CO of any changes of work schedule. Contractor will notify the Contracting Officer prior to beginning work the first day.

E. Entry to park during winter: during winter season the park is closed to the public. The contractor shall enter the site through an alternate gate as indicated by CO.

1 .3 PARK RULES AND REGULATIONS:

A. At all times the contractor shall conduct his/her operation in conformance with the rules and regulations of the National Park Service and with such appropriate regulations as the Park Superintendent may prescribe.

HOFU-FY20 6

B. Safety: The building is in the public area. Consequently great care must be taken during removal of roof materials to protect staff and visitors from injury, or nuisance of falling debris.

All debris shall be removed from area periodically and at the end of each day.

C. Protecting Historical Building and materials from Elements: Work shall be scheduled so the building, its contents and surrounding areas suffer no damage as result of action of the elements. At the end of each workday, all exposed items of area being worked on are to be sealed and the building to be water tight. Contractor will be held liable for any damage to the building due to inadequate protection.

D. Historic Nature of the Items in Storage Area of the Building: The contractor shall take precaution and protect items in the storage area to protect from any damages prior to asbestos remediation, demolition and construction work. Coordinate with CO for all work inside storage area.

E. Preservation of Natural Features: Confine all operations to work limits of the project.

Prevent damage to natural surroundings. Restore damaged areas, materials, repairing or replacing damaged trees and plants, at no additional expense to the Government.

1. Do not remove, injure, or destroy trees or other plants without prior approval. Consult with Contracting Officer and remove agreed-on branches that interfere with construction.

2. Do not fasten ropes, cables, or guys to existing trees.

3. Contractor shall be responsible for locating and preventing damage to existing utilities. If damage occurs, repair utility at no additional expense to the Government.

F. Hauling Restrictions: Comply with all legal load restrictions in the hauling of materials. Load restrictions on park roads are identical to the state load restrictions with such additional regulations as may be imposed by the Park Superintendent. Information regarding rules and regulations for vehicular traffic on park roads may be obtained from the CO. A special permit will not relieve Contractor of liability for damage, which may result from moving of equipment.

G. Storage and Protection: Store materials in accordance with manufacturer's instructions.

1 .4 SPECIAL CONSTRUCTION REQUIREMENTS:

A. Notify the Contracting Officer promptly of any conditions which need repairs by other trades.

B. Layout of the work: Locations and dimensions are subject to final field verification by the Contractor prior to commencement of this project. The Contractor shall immediately notify the CO of apparent errors discovered in the initial layout. If changes are required, the Contractor shall cooperate with the CO in the prompt establishment of the filed control for the altered or adjusted work. All work improperly done due to the Contractor’s errors shall be corrected by him/her at no additional expense to the Government.

C. Warranty: Contractor shall install new roofing system in conformance with

HOFU-FY20 7

manufacturer’s requirements of existing roofing system 30-year warranty.

D. Contractor’s Liability: Damage to existing facilities, material and equipment caused by the contractor shall be reported to the CO without delay. The contractor shall be responsible for the repairs all damages of the building, equipment, and grounds. All repairs shall be accomplished to the satisfaction of the CO.

1 .5 FIELD VERIFICATION:

A. Field verify all new and existing dimensions affecting the work of this contract before ordering products.

1 .6 CONTRACTOR-FURNISHED ITEMS:

A. All labor, equipment, tools and supervision shall be furnished by contractor.

END OF SECTION 011110

HOFU-FY20 8

SECTION 024119 - SELECTIVE DEMOLITION

PART 1 GENERAL

1 .1 DESCRIPTION

A. The work of this section consists of selective demolition in selected area of structure roof failure. Remove and dispose roofing membrane, structure materials and related components for the repair and installation of new roofing to match and align with existing roofing system.

1 .2 RELATED WORK

A. Section 01110 – Summary of Work B. Section 061000 - Rough Carpentry C. Section 075423 - Membrane Roofing System - TPO

1 .3 SUBMITTALS

A. As specified in Section 013323.

B. Submit schedule showing sequence of work and methods of demolition. As a precaution coordinate with park of the need to the shutting off and utilities and re-establishing utility/wiring services.

1 .4 QUALITY ASSURANCE

A. Comply with safety requirements for demolition, ANSI A10.

1 .5 PROJECT CONDITIONS

A. Keep dust and dirt pollution to a minimum.

B. Ensure safety of persons in demolition area. Provide temporary barriers as required.

C. Provide adequate fire protection. Keep area clear of hazardous substances and debris.

E. Separate demolition area from portions of building to remain with temporary dustproof partitions.

F. Provide temporary weather protection to prevent damage to structure and interior area.

1 .6 SCHEDULING: Complete demolition that might damage new construction before starting new work.

HOFU-FY20 9

PART 2 PRODUCTS NOT USED.

PART 3 EXECUTION

3 .1 PREPARATION

A. Provide temporary supports and protection for portion of structure to remain.

Protect fixtures and equipment to remain. Protect adjacent structures and materials to remain.

B. Cap or disconnect utilities. Provide bypass connections as necessary to maintain utility service to occupied areas of building.

3 .2 DEMOLITION

A. Work systematically from top downward.

B. Partial roofing demolition. Remove and dispose, where indicated in drawings existing

TPO roofing and related materials in small sections.

C. Avoid excessive loads on supporting framing by careful location of equipment and prompt removal of demolished materials.

3 .3 SALVAGE

A. Remove, salvage and re-install: gutter and downspouts. Re-install gutter and downspout that are in good condition. Replace damaged gutter and downspout.

Align and match with existing.

B. Carefully clean and store items to be salvaged or reused.

3 .4 RESTORATION AND CLEAN-UP

A. Repair and clean adjacent surfaces damaged or soiled by demolition work.

B. Restore utility services to normal operation.

C. Remove all affected fixtures, conduits, utilities, door openers, etc. from the ceiling to be reinstalled to its existing location upon completion of roof work, as approved by

CO.

D. Remove equipment, temporary protection and barriers, and debris.

Dispose of unsalvageable material as approved by CO.

END OF SECTION 024119

HOFU-FY20 061000

ROUGH CARPENTRY

SECTION 06 10 00 - ROUGH CARPENTRY

PART 1 - GENERAL

1.01 IN GENERAL

A. The General Conditions, and all parts of the Bid and Contract Documents are made part of this Section as if fully repeated herein.

1.02 RELATED WORK SPECIFIED ELSEWHERE:

A. 075423 Membrane Roofing System – TPO - Section 075423 B. 076000 Flashing and Sheet Metal – Section 07600

1.03 SCOPE OF WORK

In general, the Contractor shall supply all labor, materials, equipment, temporary protection, tools and appliances necessary for the proper completion of the work in this Section, as required in the Specifications and in accordance with good construction practice. The work under this Section generally includes the following:

A. Install new wood blocking at selected area perimeters, and as required to properly terminate the new roofing and existing roofing, fascia and flashing systems.

B. Provide new wood roof plywood substrate, and framing, wood deck including, but not limited to blocking and nailers to align and match adjacent with existing roofing structure.

C. Clean and restore all areas affected by the work.

1.04 JOB CONDITIONS

A. All surfaces to receive the new wood blocking shall be thoroughly dry. Should surface moisture such as dew exist, the General Contractor shall provide the necessary equipment to dry the surface prior to application. Do not dry with open flames.

B. Coordinate this work with the work described in other Sections of this Specification.

C. Do not leave any newly installed wood systems exposed to the environment. Cover and protect all newly installed wood daily.

D. Protect all existing and new wood stored on site to prevent moisture absorption. Use tarps over the wood pile (top, sides and bottom) elevated on pallets (one side lower to shed water).

E. If delays in the project exceeding one (1) week are anticipated due to inclement weather

(or due to any other condition), all wood shall be stored in weatherproof box trailers or storage sheds in locations to be designated by the Government.

F.

1.05 SUBMITTALS: Coordinate with CO for Submittals and shop drawings.

PART 2 - MATERIALS

2.01 DIMENSIONAL LUMBER

A. All dimensional lumber shall be construction grade Douglas Fir, Hem-Fir or Southern Yellow Pine, formed to the dimensions shown on the Contract Drawings and as required for proper installation of the new work. All new exterior perimeter woodwork, nailers and wood blocking used on the building shall be minimum 6" wide, except where otherwise detailed.

B. Maximum moisture content of 19% by weight on a dry weight basis. Kiln drying may be required to conform to maximum 19% moisture content. Pressure treated wood blocking will not be permitted.

2.02 PRESERVATIVE TREATED

A. Where lumber or plywood is indicated as preservative-treated or is specified to be treated, comply with applicable requirements of AWPA Standards C2 (Lumber) and AWPA C9 (Plywood), except that lumber not in contact with ground and continuously-protected from liquid water may be treated to AWPA C31 with inorganic boron (SBX).

B. Mark each treated item with Quality Mark Requirements of inspection agency approved by ALSC’s Board of Review.

C. If cut after treatment, coat cut surfaces to comply with AWPA M4.

D. Inspect each piece of lumber or plywood after drying and discard damaged or defective pieces.

2.03 PLYWOOD

A. Plywood roof decking shall be Structural Grade Fir, CDX, match existing thickness.

Pressure treated plywood will not be permitted.

2.04 FASTENERS AND ANCHORS:

A. In general, all fasteners, anchors, nails, straps and other accessories shall be of stainless steel. Electro-galvanized items shall not be used.

B. Acceptable fasteners for securing wood blocking to wood blocking shall be galvanized annular threaded ring shank nails. Fasteners shall be of sufficient length to penetrate the receiving member 1-1/4" minimum, except full depth into plywood.

C. Plywood decking shall be fastened to supporting wood structure with 8d galvanized annular threaded ring shank nails.

D. Fasteners and anchors shall be of sufficient length to penetrate the receiving substrate 1-1/2" minimum. Fasteners shall be as manufactured by Powers Fasteners or approved equal.

PART 3 - EXECUTION

3.01 GENERAL

A. Do not deliver to the site or install any material or system that has not been approved.

Items installed without approval may be required to be removed.

B. Prepared surfaces must be clean and dry. Fill, chip or grind as required to provide a smooth, uniform surface.

C. Wood deck: to match and align existing profile, type and dimensions of original wood deck.

D. All butt joints in woodwork shall be flush to provide a smooth, uniform line with no irregularities. Built-up blocking shall have butt joints staggered 4' minimum layer to layer. The minimum length of any individual piece of woodwork shall be 2'. All lengths of woodwork shall have a minimum of 2 fasteners. Layers of wood blocking at corners shall be interlocked to provide additional stability.

E. During removal and replacement of woodwork, the Contractor shall report to the CO any existing wood blocking designated to remain, or structural supports which are deteriorated or unsuitable. Do not cover unacceptable areas until reviewed by the CO but provide temporary protection to the area in question.

F. The perimeter wood blocking shall be installed at a consistent, even height throughout that roof area to provide a flush transition from insulation to blocking and provide an even and continuous line for metal fascia installation.

3.02 REMOVAL OF EXISTING WOOD BLOCKING, DECKING AND FRAMING

A. Remove and dispose of all deteriorated wood blocking, decking and framing and replace in accordance with the Contract Drawings and this Specification.

B. Upon removal of all existing framing, coordinate with Section 04920 for all masonry repairs and rebuilding to provide an adequate substrate for the installation of new framing elements.

C. Contractor is responsible for all temporary shoring as required to perform structural repairs and install new framing and decking components. Refer to the Temporary Shoring Section in this Specification for additional information.

3.03 TEMPORARY SHORING

A. It is the responsibility of the Contractor to design, erect and maintain all necessary shoring procedures sufficient to comply with applicable regulations, securely support all masonry or other elements left unsupported by the required removals, and permit the work of other trades to proceed.

1. Notify the Government 48 hours in advance of installation of shoring.

2. The maximum spacing of temporary shoring vertical supports shall be twelve

(12”) inches on center.

3. The addition of temporary lateral bracing or blocking between vertical shoring elements is required.

4. Submit the means and methods of temporary protection to interior components.

5. Submit the means and methods of temporary covering or masking of wall and roof penetrations, grills, vents and mechanical units.

6. All temporary shoring of components to remain will be the sole responsibility of the Contractor. The Contractor must supply, install and maintain all temporary shoring for the duration of the project.

7. Completely remove shoring system when no longer needed. Patch any damaged surfaces to restore to original condition.

3.04 SHEATHING INSTALLATION

A. Lay panels with joints staggered, with edge and ends 1/8 inch apart and nailed over bearings as specified. Align finished surfaces to vary not more than 1/16 inch from plane of surfaces of adjacent units.

B. Place panels with long dimension perpendicular to support.

C. Set nails not less than 3/8 inch from edges.

3.05 FASTENING OF WOODWORK

D. Wood blocking to wood blocking connections shall be made using the specified nails spaced 12” on center maximum and staggered off the centerline of the woodwork being secured. Nails shall be of sufficient length to penetrate the receiving member 1-1/4” minimum.

E. Wood blocking shall be fastened directly to the roof deck with the specified fasteners spaced 24” on center maximum, staggered off the centerline of the woodwork being secured. Predrilling of fastener holes shall be completed prior to installing fasteners.

F. Plywood decking shall be fastened to supporting wood structure spaced at 12” on center at intermediate supports and 6” on center at supported edges. Minimum depth of penetration into support shall be 2 inches.

G. Wood ledgers and rafters shall be fastened to the brick masonry with the specified fasteners spaced 16” on center maximum, staggered off the centerline of the woodwork being secured. Minimum depth of embedment shall be 6 inches. Follow manufacturer’s instructions for installation of fasteners.

H. Wood rafters shall be fastened to ledgers at the head with the specified joist hanger.

Follow manufacturer’s instructions for joist hanger fastening pattern.

I. Wood rafters shall be secured at the tail using the specified hurricane tie. Follow the manufacturer’s instructions for hurricane tie fastening pattern.

END OF SECTION 061000

HOFU-FY20

SECTION 07 54 23 MEMBRANE ROOFING SYSTEM - TPO

The project consists to repair selected area of damaged wood deck failure at Hopewell Furnace National Historic Site in Maintenance building located in Elverson, PA. Work includes to match and align new single membrane roofing system with existing roofing system of 30-year warranty roof of thermoplastic polyolefin -TPO back fleece adhered attached single membrane roofing system and related components.

1.1 SUMMARY

A. Furnish and install single sheet roofing system to match and align with existing roofing system, including:

1. Material and installation of new roofing shall be in compliance with 30-year warranty requirements of existing roofing system. Verify existing roofing membrane system to match in kind existing roofing membrane components.

2. Shore existing structure to allow construction work. Remove shoring after completion of project, as approved by CO.

3. Install new roofing system over sound wood deck.

4. Provide and install roofing plywood, blocking and nailers as required for new roofing.

5. Tapered insulation to match existing.

6. Thermoplastic polyolefin -TPO back fleeced adhered single membrane roofing system

7. Metal fascia

8. Flashings

9. Ridge

10. Lap joint watertight connection between new and existing roofing

B. Disposal of demolition debris and construction waste is the responsibility of Contractor. Perform disposal in manner complying with all applicable federal, state, and local regulations.

C. Comply with the recommendations and instructions of the roofing membrane manufacturer. The entire system components shall be from the same manufacturer.

D. Commencement of work by the Contractor shall constitute acknowledgement that the specification, herewith, can be satisfactorily executed, with all necessary prerequisites per warranty requirements.

1.2 RELATED REQUIREMENTS

A. Section 06 10 00 - Rough Carpentry: Wood deck, nailers and related accessories associated with roofing and roof insulation.

1.3 REFERENCES

A. Referenced Standards: These standards form part of this specification only to the extent they are referenced as specification requirements.

1. ASTM C177 - Standard Test Method for Steady-State Heat Flux

Measurements and Thermal Transmission Properties by Means of the Guarded-Hot-Plate Apparatus; 2010.

2. ASTM C209 - Standard Test Methods for Cellulosic Fiber Insulating Board;

2012.

3. ASTM C518 - Standard Test Method for Steady-State Thermal

Transmission Properties by Means of the Heat Flow Meter Apparatus;

2010.

4. ASTM C1289 - Standard Specification for Faced Rigid Cellular Polyisocyanurate Thermal Insulation Board; 2013.

5. ASTM C1549 - Standard Test Method for Determination of Solar Reflectance Near Ambient Temperature Using a Portable Solar Reflectometer; 2009.

6. ASTM D638 - Standard Test Method for Tensile Properties of Plastics; 2010.

7. ASTM D1004 - Standard Test Method for Tear Resistance (Graves Tear) of Plastic Film and Sheeting; 2009.

8. ASTM D1079 - Standard Terminology Relating to Roofing and Waterproofing;

2013.

9. ASTM D1621 - Standard Test Method for Compressive Properties of Rigid

Cellular Plastics; 2010.

10. ASTM D1622 - Standard Test Method for Apparent Density of Rigid Cellular Plastics; 2008.

11. ASTM D3273 - Standard Test Method for Resistance to Growth of Mold on the Surface of Interior Coatings in an Environmental Chamber; 2012.

12. ASTM D6878/D6878M - Standard Specification for Thermoplastic Polyolefin Based Sheet Roofing; 2011a.

13. CAN-ULC-S770 - Standard Test Method Determination of L-Term Thermal Resistance of Closed-Cell Thermal Insulating Foams; 2009.

14. FM DS 1-28 - Wind Design; Factory Mutual System; 2007.

15. FM DS 1-29 - Roof Deck Securement and Above-Deck Roof Components;

Factory Mutual System; 2006.

16. PS 1 - Structural Plywood; Latest edition

17. PS 20 - American Softwood Lumber Standard; 2010.

18. SPRI ES-1 - Wind Design Standard for Edge Systems Used with Low Slope Roofing Systems; 2003. (ANSI/SPRI ES-1)

1.4 SUBMITTALS

A. Product Data:

1. Provide membrane manufacturer's printed data sufficient to show that all components of roofing system, including insulation and fasteners, comply with the specified requirements and with the membrane manufacturer's requirements and recommendations for the system type specified; include data for each product used in conjunction with roofing membrane.

2. Where UL or FM requirements are specified, provide documentation that shows that the roofing system to be installed is UL-Classified or FM-approved, as applicable; include data itemizing the components of the classified or approved system.

3. Installation Instructions: Provide manufacturer's instructions to installer, marked up to show exactly how all components will be installed; where instructions allow installation options, clearly indicate which option will be used.

B. Shop Drawings: Provide:

1. The roof membrane manufacturer's standard details customized for this project for all relevant conditions, including flashings, base tie-ins, parapet roof, terminations, penetrations, and suppers.

2. For tapered insulation to fit existing curved roof structure, provide project-specific layout and dimensions for each board.

C. Pre-Installation Notice: Copy to show that manufacturer's required Pre- Installation Notice (PIN) has been accepted and approved by the manufacturer.

D. Executed Warranty.

1.5 QUALITY ASSURANCE

A. Applicator Qualifications: Roofing installer shall have the following:

1. Current manufacturer Master Contractor status for TPO roof with 30 year warranty.

2. At least five years’ experience in installing specified system.

3. Capability to provide payment and performance bond to building owner.

B. Pre-Installation Conference: Before start of roofing work, Contractor shall hold a meeting to discuss the proper installation of materials and requirements to achieve the warranty.

1. Require attendance with all parties directly influencing the quality of roofing work or affected by the performance of roofing work.

2. Notify CO well in advance of meeting.

1.6 DELIVERY, STORAGE AND HANDLING

A. Deliver products in manufacturer's original containers, dry and undamaged, with seals and labels intact and legible.

B. Store materials clear of ground and moisture with weather protective covering.

C. Keep combustible materials away from ignition sources.

1.7 WARRANTY

A. Comply with all warranty procedures required by manufacturer, including notifications, scheduling, and inspections.

B. Warranty: 30-year Platinum covering membrane, roof insulation, and membrane accessories.

C. Systems specified with a wind speed coverage above 55 mph require additional attachment and detail considerations. Consult the manufacturer’s design guidelines for further information.

1. Limit of Liability: No dollar limitation.

2. Scope of Coverage: Repair leaks in the roofing system caused by:

a. Ordinary wear and tear of the elements.

b. Manufacturing defect in brand materials.

c. Defective workmanship used to install these materials.

d. Damage due to winds up to 55 mph.

3. Not Covered:

a. Damage due to winds in excess of 55 mph.

b. Damage due to hurricanes or tornadoes.

c. Hail.

d. Intentional damage.

e. Unintentional damage due to normal rooftop inspections, maintenance, or service.

PART 2 PRODUCTS

2.1 MANUFACTURER

A. Acceptable Manufacturer: in compliance to warranty of existing roofing system.

Manufacturer: Versico, a division of Carlisle Construction Materials Incorporated.

1. ISO 9002 certified.

2. Able to provide polyisocyanurate insulation that is produced in own facilities.

B. Manufacturer of Insulation and Cover Boards: Same manufacturer as roof membrane.

C. Manufacturer of Metal Roof Edging: Same manufacturer as roof membrane.

1. Metal roof edging products by other manufacturers are not acceptable.

2. .050 metal gage thickness for edge metal, scuppers and downspouts. Color to match existing.

3. Field- or shop-fabricated metal roof edgings are not acceptable.

D. Substitution Procedures: See Instructions to Bidders.

1. Submit evidence that the proposed substitution complies with the specified requirements.

2.2 ROOFING SYSTEM DESCRIPTION

A. Roofing System: 30-year Warranty

1. Membrane: Thermoplastic Polyolefin (TPO) back fleece single-ply membrane.

2. Thickness: 80 mils

3. Membrane Attachment: Fully adhered.

4. Tapered insulation to align and match existing: Deck is sloped applicable for dome roof type

5. Comply with applicable local building code requirements.

6. Provide assembly having Underwriters Laboratories, Inc. (UL) Class A Fire Hazard

Classification.

B. Insulation: verify the following components, including existing insulation to match thickness, R value and slope.

1. Total System R Value

2. Board Thickness: use as many layers as necessary; stagger joints.

3. Base Layer: Polyisocyanurate foam board, non-composite.

a. Attachment: Mechanical fastening.

4. Top Layer: Polyisocyanurate foam board, non-composite.

a. Attachment: Mechanical fastening.

2.3 TPO MEMBRANE MATERIALS

A. Roofing Membrane: Match existing membrane. Components to meet a 30-year warranty, and the following additional characteristics. Verify existing TPO back fleece membrane materials to match existing:

1. Thickness

2. Puncture Resistance

3. Solar Reflectance

4. Color: match existing

5. Acceptable Product: High quality TPO

B. Membrane Fasteners: Type and size as required by roof membrane manufacturer for roofing system and warranty to be provided; use only fasteners furnished by roof membrane manufacturer. Stainless steel.

C. Formable Flashing: Verify existing to match existing components.

a. Thickness

b. Tensile Strength

c. Elongation at Break

d. Tearing Strength

e. Color: match existing

f. Acceptable Product: TPO Flashing for 30-year warranty.

g. Tape Flashing

h. Seam Plates

i. Termination Bars

j. Cut Edge Sealant

k. General Purpose Sealant

2.4 Molded Flashing Accessories

2.5 ROOF INSULATION

A. Polyisocyanurate Board Insulation: Closed cell polyisocyanurate foam with black glass reinforced mat laminated to faces, complying with ASTM C 1289 Type II Class 1, with the following additional characteristics:

1. Thickness: minimum thickness as recommended by roofing membrane manufacturer acceptable for 30 year warranty

2. Size: 48 inches by 48 inches, nominal.

a. Exception: Insulation to be attached using adhesive or asphalt may be no larger than 48 inches by 48 inches, nominal.

3. R-Value (LTTR): minimum thickness of insulation for selected roofing membrane type.

4. Compressive Strength: 20 psi when tested in accordance with ASTM C 1289.

5. Ozone Depletion Potential: Zero; made without CFC or HCFC blowing agents.

6. Recycled Content: 19 percent post-consumer and 15 percent post-industrial, average.

7. Acceptable Product: Flat and/or Tapered ISO 95+ polyiso board insulation by Firestone B. Insulation Fasteners: Type and size as required by roof membrane manufacturer for roofing system and warranty to be provided; use only fasteners furnished by roof membrane manufacturer.

2.6 METAL ACCESSORIES

A. Coping to match existing B. Reglet: to match existing C. Counter flashing: watertight with no exposed fasteners.

1. Coping Face Height: to match existing.

2. Edge Member Height Above Nailer: 1-1/4 inches.

3. Length: 144 inches.

4. Functional Characteristics: Fascia retainer supports while allowing for free thermal cycling of fascia.

5. Aluminum Bar: Continuous 6063-T6 alloy aluminum extrusion with pre-punched slotted holes; miters welded; injection molded EPDM splices to allow thermal expansion.

6. Anchor Bar Cleat: 20 gage, 0.036 inch G90 coated commercial type galvanized steel with pre-punched holes.

7. Fasteners: Factory-provided corrosion resistant fasteners, with drivers; no exposed fasteners permitted.

8. Accessories: Provide downspout and other special fabrications to match existing.

2.7 ACCESSORY MATERIALS

A. Wood Nailers: PS 20 dimension lumber, Structural Grade No. 2 or better

Southern Pine, Douglas Fir; or PS 1, APA Exterior Grade plywood; pressure preservative treated.

1. Width: 3-1/2 inches (90 mm), nominal minimum, or as wide as the nailing flange of the roof accessory to be attached to it.

2. Thickness: Same as thickness of roof insulation.

PART 3 INSTALLATION

3.1 GENERAL

A. Install roofing, insulation, flashings, and accessories in accordance with roofing manufacturer's published instructions and recommendations for the specified roofing system. Where manufacturer provides no instructions or recommendations, follow good roofing practices and industry standards.

Comply with federal, state, and local regulations.

B. Obtain all relevant instructions and maintain copies at project site for duration of installation period.

C. Do not start work until Pre-Installation Notice has been submitted to manufacturer as notification that this project requires a manufacturer's warranty.

D. Perform work using competent and properly equipped personnel.

E. Temporary closures, which ensure that moisture does not damage any completed section of the new roofing system, are the responsibility of the applicator. Completion of flashings, terminations, and temporary closures shall be completed as required to provide a watertight condition.

F. Install roofing membrane only when surfaces are clean, dry, smooth and free of snow or ice; do not apply roofing membrane during inclement weather or when ambient conditions will not allow proper application; consult manufacturer for recommended procedures during cold weather. Do not work with sealants and adhesives when material temperature is outside the range of 60 to 80 degrees F (15 to 25 degrees C).

G. Protect adjacent construction, property, vehicles, and persons from damage related to roofing work; repair or restore damage caused by roofing work.

1. Protect from spills and overspray from bitumen, adhesives, sealants and coatings.

2. Particularly protect metal, glass, plastic, and painted surfaces from bitumen, adhesives, and sealants within the range of wind-borne overspray.

3. Protect finished areas of the roofing system from roofing related work traffic and traffic by other trades.

H. Until ready for use, keep materials in their original containers as labeled by the manufacturer.

I. Consult membrane manufacturer's instructions, container labels, and Safety Data Sheets (SDS) for specific safety instructions. Keep all adhesives, sealants, primers and cleaning materials away from all sources of ignition.

3.2 EXAMINATION

A. Examine roof deck to determine that it is sufficiently rigid to support installers and their mechanical equipment.

B. Verify that surfaces and site conditions are ready to receive work. Correct defects in the substrate before commencing with roofing work.

C. Examine roof substrate to verify that it is properly sloped to drains.

D. Verify that the specifications and drawing details are workable and not in conflict with the roofing manufacturer's recommendations and instructions; start of work constitutes acceptable of project conditions and requirements.

3.3 PREPARATION

A. Prior to proceeding, prepare roof surface so that it is clean, dry, and smooth, and free of sharp edges, fins, roughened surfaces, loose or foreign materials, oil, grease and other materials that may damage the membrane.

B. Fill all surface voids in the immediate substrate that are greater than 1/4 inch (6 mm) wide with fill material acceptable insulation to membrane manufacturer.

C. Seal, grout, or tape deck joints, where needed, to prevent seepage of foreign materials into building.

D. Remove existing ceiling appurtenances and ceiling to allow construction work. Re-install upon completion of work. Replace with new damaged materials.

3.4 DECK INFILL

A. New deck shall match existing original tongue and groove wood deck to align and match existing in kind.

3.5 INSULATION INSTALLATION

A. Install insulation in configuration and with attachment method(s) specified in

Part 2, under Roofing System.

B. Install only as much insulation as can be covered with the completed roofing system before the end of the day's work or before the onset of inclement weather.

C. Lay roof insulation in courses parallel to roof edges.

D. Neatly and tightly fit insulation to all penetrations, projections, and nailers, with gaps not greater than 1/4 inch. Fill gaps greater than 1/4 inch with acceptable insulation. Do not leave the roofing membrane unsupported over a space greater than 1/4 inch. .

E. Mechanical Fastening: Using specified fasteners and insulation plates engage fasteners through insulation into deck to depth and in pattern required by Factory Mutual for FM Class specified in PART 2 and membrane manufacturer, whichever is more stringent.

3.6 SINGLE-PLY MEMBRANE REPAIR & INSTALLATION

A. Follow roofing manufacturer instructions for roofing repairs and installation of new single membrane roofing to align and match existing.

B. Beginning at low point of roof, place membrane without stretching over substrate and allow to relax at least 30 minutes before attachment or splicing;

in colder weather allow for longer relax time.

C. Lay out the membrane pieces so that field and flashing splices are installed to shed water.

D. Install membrane without wrinkles and without gaps or fish mouths in seams;

bond and test seams and laps in accordance with membrane manufacturer's instructions and details.

E. Install membrane mechanically attached to the substrate using seam battens, fasteners, and edge securement as specified and as required by membrane manufacturers.

F. Mechanical Attachment: Install fasteners in the seams, covered by membrane.

1. Lay out fasteners in compliance with FM Class specified in PART 2, as recommended by membrane manufacturer, and as indicated, whichever is most stringent.

2. Properly engage fasteners in the deck with head flush with the countersunk portion of seam plate.

G. Edge Securement: Secure membrane at all locations where membrane terminates or goes through an angle change greater than 2 in 12 inches using mechanically fastened reinforced perimeter fastening strips, plates, or metal edging as indicated or as recommended by roofing manufacturer.

1. Exceptions: Round pipe penetrations less than 18 inches in diameter and square penetrations less than 4 inches square.

H. Metal edging is not merely decorative; ensure anchorage of membrane as intended by roofing manufacturer.

3.7 FLASHING AND ACCESSORIES INSTALLATION

A. Install flashings, including laps, splices, joints, bonding, adhesion, and attachment, as required by membrane manufacturer's recommendations and details.

B. Metal Accessories: Install metal edgings, gravel stops, and copings in locations indicated on the drawings, with horizontal leg of edge member over membrane and flashing over metal onto membrane.

1. Follow roofing manufacturer's instructions.

2. Remove protective plastic surface film immediately before installation.

3. Install water block sealant under the membrane anchorage leg.

4. Flash with manufacturer's recommended flashing sheet unless otherwise indicated.

5. Where single application of flashing will not completely cover the metal flange, install additional piece of flashing to cover the metal edge.

6. If the roof edge includes a gravel stop and sealant is not applied between the laps in the metal edging, install an additional piece of self-adhesive flashing membrane over the metal lap to the top of the gravel stop; apply seam edge treatment at the intersections of the two flashing sections.

7. When the roof slope is greater than 1:12, apply seam edge treatment along the back edge of the flashing.

3.8 FIELD QUALITY CONTROL

A. Inspection by Manufacturer: Provide final inspection of the roofing system by a Technical Representative employed by roofing system manufacturer specifically to inspect installation for warranty purposes. Perform all corrections necessary for issuance of warranty.

3.9 CLEANING

A. Clean all contaminants generated by roofing work from building and surrounding areas, including bitumen, adhesives, sealants, and coatings.

B. Repair or replace building components and finished surfaces damaged or defaced due to the work of this section; comply with recommendations of manufacturers of components and surfaces.

C. Remove leftover materials, trash, debris, equipment from project site and surrounding areas.

3.10 PROTECTION

A. Where construction traffic must continue over finished new roof membrane, provide durable protection and replace or repair damaged roofing to original condition.

END OF SECTION 075423

SECTION 076000 - FLASHING AND SHEET METAL

1.1 DESCRIPTION

A. The work of this section consists of furnishing and installing fascia, flashing, overhang soffit and sheet metal.

1.2 SUBMITTALS

A. Coordinate with CO for submittals and shop Drawings to match existing materials and roofing system.

B. Samples: Two 12-inch by 12-inch samples of each sheet metal material. Show pattern, finish, color, and thickness.

C. Manufacturer's Literature: Sheet metal manufacturer's welding instructions, printed instructions, and recommendations for installation.

PART 2 PRODUCTS

2.1 SHEET METAL

A. Material components to match existing, B. Compatible for new TPO roofing system applicable for 30 year roofing warranty.

C. Match metal flashing compatible to adjacent metals. Install similar metal flashing and fasteners to prevent corrosion from galvanic action from dissimilar metals. Coordinate with CO.

2.2 FASTENERS

A. All fasteners, nails, screws, rivets, bolts, nuts, shall be of similar metal for roofing construction. Stainless steel.

2.3 EXPANSION ANCHORS

A. FS FF-B-588C.

2.4 SEALANT

A. FS TT-S-227E, Type II, Class A, or FS TT-S-230A, Type II, or manufacturer's standard, one part polysulfide, silicone, or polyurethane type.

EDIS-FY 28

2.5 Products as recommended by roofing manufacturer for TPO 30 year warranty roofing system:

A. Bituminous plastic cement

B. Primer coating

C. Asphaltic coating compound

PART 3 EXECUTION

3.1 INSPECTION

A. Determine that surfaces are smooth and clean to the extent required for sheet metal work. Correct defective surfaces or report them to the Contracting Officer.

Verify that reglets, nails, cants, and blocking to receive sheet metal are installed and free of soil.

B. Before commencing work, verify existing profiler, size and dimensions of existing flashing conditions. Do not begin work until coordinating with CO.

3.2 INSTALLATION

A. Perform all work of new metal flashings according to roofing single membrane manufacturer.

B. General: Install work watertight, without waves, warps, buckles, fastening stresses, or distortion. Allow for expansion and contraction. Angle bottom edges of exposed vertical surfaces to form drips. Hem exposed edges.

C. Reglet: Install at chimney at same existing location, straight, in-line, and with leak-proof joints.

D. Sealant Installation: Apply 1/4-inch diameter bead, centered on full length of joint.

E. Bituminous Plastic Cement: Trowel 1/8-inch thick.

F. Equipment Support Flashing: Fully cap support. Seal around penetration through flashing. Install per roofing manufacturer instructions.

3.3 CLEANING

A. As work progresses, clean thoroughly. Leave work clean and free of stains and debris.

END OF SECTION 07600