5201-2015344-14_Roof_Replacement_SOW_ _Specs_40_yr.pdf

5201 ROOF SCOPE OF WORK:

1. THIS PROJECT INVOLVES THE ROOF REPLACEMENT OF AN APPROX. 17,950

+/- SF MULTI-LEVEL ROOF AND INCLUDES ALL RELATED ROOF BUILDING

AND SYSTEM COMPONENTS INSTALLED AS DRAWN, DETAILED AND NOTED

ON DRAWINGS AND SPECIFICATIONS.

2. DPW DRAWING SHOW ITEMS TO BE REMOVED OR MODIFIED ON ROOF.

3. ACTUAL ROOF REPLACEMENT AND METAL ARE COVERED IN GARLAND

ROOF DRAWINGS AND SPECS.

3.1. THIS PROJECT INVOLVES THE TWO PLY MODIFIED BITUMIN ROOF

RECOVER SYSTEM INSTALLED OVER THE EXISTING GRAVEL BUR ROOF

AT BUILDING 5201. WET AREAS ARE TO BE TORN OUT AND BUILT UP TO

ROOF LEVEL WITH ISO AND SECUROCK. ALL FLASHINGS AND GRAVEL IS

TO BE REMOVED PRIOR TO ADHERING THE ½” SECUROCK RECOVERY

BOARD TO EXISTING ROOF WITH HIGH RISE INSULATION ADHESIVE.

TWO PLY MODIFIED BITUMIN MEMBRANE ROOF SYSTEM IS TO BE

INSTALLED IN HOT ASPHALT. EAST ROOF GETS ¼” TAPERD ISO WITH

MINIMUM ½” START WITH WATER DRAINING TO SCUPPERS. INSTALL

NEW PREMANUFACTURED COPING, EDGE METAL,

GUTTERS/DOWNSPOUTS, AND SPECIFIED WALL PANELS (SOUTHEAST

ROOF ONLY).

GENERAL NOTES:

1. CONTRACTOR SHALL VERIFY ALL CONDITIONS AND DIMENSIONS PRIOR TO

ORDERING ANY MATERIALS OR BEGINNING ANY DEMOLITION OR

INSTALLATION. ANY DISCREPANCIES SHALL PROMPTLY BE BROUGHT TO

THE ATTENTION OF THE CONTRACTING OFFICER'S REPRESENTATIVE.

2. CONTRACTOR SHALL COMPLY WITH ALL APPLICABLE CODES, LAWS,

STANDARDS, AND REGULATIONS AND FOLLOW ALL MANUFACTURER'S

INSTRUCTIONS FOR THE PROPER TRANSPORTATION, STORAGE AND

INSTALLATION OF ALL MATERIALS.

3. CONTRACTOR SHALL REPAIR ALL DAMAGE TO ADJACENT EXISTING

CONSTRUCTION RESULTING FROM THE PERFORMANCE OF THIS WORK.

REPAIRS SHALL MATCH EXISTING IN TYPE AND QUALITY.

4. CONTRACTOR SHALL SMOOTH, FERTILIZE, AND SOD TO MATCH EXISTING

GRASS AREAS DAMAGED FROM THE PERFORMANCE OF THIS WORK.

CONTRACTOR SHALL GUARANTEE GROWTH AND DEVELOPMENT FOR ONE

YEAR.

5. CONTRACTOR SHALL ARRANGE PROJECT SCHEDULE AND DAILY WORK

HOURS IN CONSULATION WITH THE COR AND ARSENAL SECURITY

PERSONNEL. NO BUILDING, VEHICLE, OR EQUIPMENT SHALL REMAIN

UNSECURED AFTER WORKING HOURS.

6. CONTRACTOR SHALL PROVIDE A SAFE AND CLEAN WORKING

ENVIRONMENT, SHALL REMOVE AND DISPOSE OF ALL DEBRIS TO

APPROPRIATE LOCATIONS AND SHALL PROVIDE FOR CONTINUAL

VEHICULAR ACCESS TO ADJACENT PARKING AREAS EXCEPT FOR BRIEF

PREANNOUNCED PERIODS.

7. CONTRACTOR SHALL PROVIDE FOR THE PROMPT DAILY REMOVAL AND

DISPOSAL OF CONSTRUCTION DEBRIS TO APPROPRIATE LOCATIONS AND

SHALL PROVIDE FOR A SAFE AND CLEAN WORKING ENVIRONMENT.

8. A MANUFACTURER'S STANDARD WARRANTY FOR THE ROOFING SYSTEM

INCLUDING WEATHER-TIGHTNESS, STRUCTURAL INTEGRITY, AND FINISH

INCLUDING MATERIAL AND LABOR, SHALL BE PROVIDED FOR NOT LESS

THAN 40 YEARS AS APPLICABLE FOR SYSTEM FROM THE DATE OF FINAL

ACCEPTANCE BY THE GOVERNMENT. SEE ROOF REPAIR & COATING

SPECIFICATIONS FOR DETAILS.

US ARMY GARRISON – DEPARTMENT OF PUBLIC WORKS – BUILDING 5201

SCOPE OF WORK:

1. A moisture survey was performed. Wet areas to be torn out and built up to roof level with polyisocyanurate.

2. Vacuum up all loose gravel from existing BUR roof, remove blisters, ridges, buckles and other substrate irregularities that would inhibit new recover boards from conforming to substrate.

3. Apply an universal insulation primer to the surface at a rate of ¼ - ½ gallon per square.

4. Install ½” Securock cover board with insulation adhesive.

5. Install ½” per foot perlite or HD wood fiberboard insulation crickets between each scupper, between scupper and wall, and the high side of all curbs with Type IV asphalt.

6. Install 80 mil SBS base sheet over Securock with Type IV asphalt as per specifications.

7. Install 145 mil SBS urethane modified cap sheet over 80 mil SBS base sheet with hot bitumen as per specifications.

8. Install 80 mil SBS base flashing and 145 mil cap flashing as per specifications. Seal all vertical laps of flashing ply with a three-course application of trowel-grade mastic and fiberglass mesh.

9. Remove any obsolete rooftop equipment no longer in service as identified by owner.

10. Demo all old plumbing stacks and install new ones. Should be 4lb sheet lead formed and rolled.

11. Provide walkway pads as shown on drawings spaced 18” apart. Adhere pads with structural adhesive.

12. Install overflow scuppers of same number and size a minimum of 2” of above the primary scuppers on applicable roof sections.

13. All rooftop equipment and ladders shall be scraped and sanded to remove any loose or flaking paint and rust. Apply a direct to metal rust inhibitive primer and then paint with two coats of exterior oil based bronze paint. Ladder shall be painted to match exterior building.

14. Install new premanufactured edge metal, coping, gutters, downspouts, and counterflashing.

East Roof

1. Adhere ¼” tapered polyisocyanurate insulation with insulation adhesive with ½” start.

2. Install ½” Securock cover board with Type IV hot asphalt.

3. Install ½” crickets to divert water to drains.

4. Install base and cap sheet as specified above. Coat with aluminum coating.

SouthEast Roof

1. Install Imetco PermWall 1.5 Series wall panels on specified area.

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PROJECT SPECIFICATION FOR:

US ARMY GARRISON / DEPARTMENT OF PUBLIC WORKS / 5201 ROOF RECOVER

MODIFIED BITUMINOUS MEMBRANE ROOFING

PART 1 GENERAL

1.1 SECTION INCLUDES

A. Hot Applied 2-Ply Asphalt Roofing

B. Edge Treatment and Roof Penetration Flashings

1.2 DESIGN / PERFORMANCE REQUIREMENTS

A. Perform work in accordance with all federal, state and local codes. It is the intent of this specification to install a long-term, quality modified bitumen roofing system that meets or exceeds all current NRCA guidelines as stated in the most recent edition of the NRCA Roofing and Waterproofing Manual.

1.3 SUBMITTALS

A. Product Data: Provide manufacturer's technical product data for each roofing product specified. Include data substantiating that materials comply with specified requirements.

B. Unexecuted Manufacturer's warranty.

C. Closeout Submittals: Provide manufacturer's maintenance instructions that include recommendations for periodic inspection and maintenance of all completed roofing work.

Provide product warranty executed by the manufacturer. Assist Owner in preparation and submittal of roof installation acceptance certification as may be necessary in connection with fire and extended coverage insurance on roofing and associated work.

D. Any material submitted as an equal to specified material must also be accompanied by a report signed and sealed by a professional engineer licensed in the state in which the installation is to take place. This report shall show that the submitted equal meets the Design and Performance criteria in this specification. Substitution requests submitted without licensed engineer approval will be rejected for non-conformance.

1.4 QUALITY ASSURANCE

A. Perform Work in accordance with NRCA Roofing and Waterproofing Manual.

B. Manufacturer Qualifications: Company specializing in manufacturing products specified with documented ISO 9001 certification and minimum of twelve years of documented experience and must not have been in Chapter 11 bankruptcy during the last five years.

C. Installer Qualifications: Company specializing in performing Work of this section with minimum five years documented experience and a certified Pre-Approved Garland Contractor.

D. Installer's Field Supervision: Maintain a full-time Supervisor/Foreman on job site during all phases of roofing work while roofing work is in progress.

E. Product Certification: Provide manufacturer's certification that materials are manufactured in the United States and conform to requirements specified herein, are chemically and physically compatible with each other, and are suitable for inclusion within the total roof system specified herein.

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F. Source Limitations: Obtain all components of roof system from a single manufacturer.

Secondary products that are required shall be recommended and approved in writing by the roofing system Manufacturer. Upon request of the Architect or Owner, submit Manufacturer's written approval of secondary components in list form, signed by an authorized agent of the Manufacturer.

1.5 PRE-INSTALLATION MEETINGS

A. Convene minimum two weeks prior to commencing Work of this section.

B. Review installation procedures and coordination required with related Work.

C. Inspect and make notes of job conditions prior to installation:

1. Record minutes of the conference and provide copies to all parties present.

2. Identify all outstanding issues in writing designating the responsible party for follow-up action and the timetable for completion.

3. Installation of roofing system shall not begin until all outstanding issues are resolved to the satisfaction of the Architect.

1.6 DELIVERY, STORAGE, AND HANDLING

A. Deliver and store products in manufacturer's unopened packaging with labels intact until ready for installation.

B. Store all roofing materials in a dry place, on pallets or raised platforms, out of direct exposure to the elements until time of application. Store materials at least 4 inches above ground level and covered with "breathable" tarpaulins.

C. Stored in accordance with the instructions of the manufacturer prior to their application or installation. Store roll goods on end on a clean flat surface. No wet or damaged materials will be used in the application.

D. Store at room temperature wherever possible, until immediately prior to installing the roll.

During winter, store materials in a heated location with a 50 degree F (10 degree C) minimum temperature, removed only as needed for immediate use. Keep materials away from open flame or welding sparks.

E. Avoid stockpiling of materials on roofs without first obtaining acceptance from the Architect/Engineer.

F. Adhesive storage shall be between the range of above 40 degree F (4 degree C) and below 80 degree F (27 degree C). Area of storage shall be constructed for flammable storage.

1.7 COORDINATION

A. Coordinate Work with installing associated metal flashings as work of this section proceeds.

1.8 PROJECT CONDITIONS

A. Owner will occupy portions of the building immediately below re-roofing area. Conduct re-roofing so Owner’s operations will not be disrupted. Provide Owner will no less than 72 hours’ notice of activities that may affect Owners’ operations.

B. Coordinate work activities daily with Owner so Owner can implement protective dust or water leakage covers over sensitive equipment or furnishings, shut down HVAC and fire-alarm or detection equipment if needed, and evacuate occupants from below the work area.

C. Protect building to be re-roofed, adjacent buildings, walkways, site improvements, exterior

07550-3 plantings, and landscaping from damage or soiling from re-roofing operations.

D. Maintain access to existing walkways, corridors, and other adjacent occupied or used facilities.

E. Weather Condition Limitations: Do not apply roofing membrane during inclement weather or when inclement weather is expected.

F. Proceed with roofing work only when existing and forecasted weather conditions will permit unit of work to be installed in accordance with manufacturer’s recommendations and warranty requirements.

1.9 MANUFACTURER’S INSPECTIONS

A. When the project is in progress, a full time employee of the roofing system manufacturer will provide the following:

1. Keep the Design Professional informed as to the progress and quality of the work as observed.

2. Provide job site inspections a minimum of three days a week.

3. Report to the Design Professional in writing any failure or refusal of the Contractor to correct unacceptable practices called to the Contractor's attention.

4. Confirm after completion that manufacturer has observed no applications procedures in conflict with the specifications other than those that may have been previously reported and corrected.

1.10 WARRANTY

A. Upon completion of the work, provide the Manufacturer's written and signed Edge to Edge NDL System Warranty, warranting that, if a leak develops in the roof during the term of this warranty, due either to defective material or defective workmanship by the installer, the manufacturer shall provide the Owner, at the Manufacturer's expense, with the labor and material necessary to return the defective area to a watertight condition including Garland Metal Components.

1. Warranty Period:

a. 40 years from date of acceptance with a mid period inspection required from the manufacturer.

B. Installer is to guarantee all work against defects in materials and workmanship for a period indicated following final acceptance of the Work.

1. Warranty Period:

a. One (1) years from date of acceptance.

1.11 PRODUCT OPTIONS AND SUBSTITUTIONS

A. Any material submitted as an equal to specified material must also be accompanied by a report signed and sealed by a professional engineer licensed in the state in which the installation is to take place. This report shall show that the submitted equal meets the Design and Performance criteria in this specification. Substitution requests submitted without licensed engineer approval will be rejected for non-conformance.

B. Any deficiencies in performance, warranty terms or improper submittal procedure will constitute grounds for immediate rejection of substitution.

PART 2 PRODUCTS

2.1 PRODUCTS, GENERAL

A. Basis of Design: Materials, manufacturer’s product designations, and/or manufacturer’s

07550-4 names specified herein shall be regarded as the minimum standard or quality required for work of this Section. Comply with all manufacturer and contractor/fabricator quality and performance criteria.

2.2 ACCEPTABLE MANUFACTURERS

A. Acceptable Manufacturer: Garland Company, Inc. (The), which is located at: 3800 E. 91st St.; Cleveland, OH 44105; Toll Free Tel: 800-321-9336; Tel: 216-641-7500; Fax: 216-641- 0633; Web:www.garlandco.com

B. Any item or materials submitted as a substitution to the manufacturer specified must comply in all respects as to the quality and performance of the brand name specified. The Architect/Owner shall be the sole judge as to whether or not an item submitted as a substitute is truly equal. Should the Contractor choose to submit a substitute product, he shall assume all monetary or other risk involved, should the Architect/Owner find the substitution unacceptable.

2.3 HOT APPLIED 2-PLY ASPHALT ROOFING

A. Primer: Universal insulation primer applied to existing BUR roof

B. Insulation: ¼” tapered ISO (ONLY on East Roof Section)

C. Insulation Adhesive: High rise roof insulation adhesive to adhere ISO and cover board

D. Cover Board: ½” Securock bonded to existing BUR with Insulation Adhesive

E. Base (Ply) Sheet: One ply bonded to the cover board substrate with Hot Asphalt

F. Urethane Modified Cap (Ply) Sheet: One ply bonded to the base sheet with Hot Asphalt

G. Interply Adhesive (1 & 2): Generic Type IV Asphalt:

H. Flashing Base & Cap Sheet: One ply base and one ply cap bonded to the prepared substrate with Hot Bitumin

2.4 ROOFING MATERIALS PERFORMANCE REQUIREMENTS

A. Primer:

1. Non-fibered, quick drying, asphalt based roof primer. It re-saturates existing roofs to form a tough, elastic bonding surface.

a. Meets ASTM D 41

b. Flash Point ASTM D 93 100 deg. F

c. Non-Volatile ASTM D 2369 47.6%

B. Insulation Adhesive

1. Highly elastomeric, one step, VOC compliant, high rise roof insulation adhesive that contains no solvents and sets in minutes.

C. Base (Ply) Sheet / Flashing Base (Ply) Sheet:

1. 80 mil SBS (Styrene-Butadiene-Styrene) rubber modified roofing base sheet reinforced with a dual fiberglass reinforced scrim, performance requirements according to ASTM D 5147.

a. Tensile Strength, ASTM D 5147

1) 2 in/min. @ 73.4 +/- 3.6 deg. F MD 225 lbf/in XD 225 lbf/in

2) 50 mm/min. @ 23 +/- 2 deg. C MD 39.0 kN/m XD 39.0 kN/m

b. Tear Strength, ASTM D 5147

1) 2 in/min. @ 73.4 +/- 3.6 deg. F MD 300 lbf XD 300 lbf

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2) 50 mm/min. @ 23 +/- 2 deg. C MD 1335 N XD 1335 N

c. Elongation at Maximum Tensile, ASTM D5147

1) 2 in/min. @ 73.4 +/- 3.6 deg. F MD 4% XD 4%

2) 50 mm/min. @ 23 +/- 2 deg. C MD 4% XD 4%

d. Low Temperature Flexibility, ASTM D 5147, Passes -30 deg. F (-34.4 deg. C)

D. Thermoplastic Modified Cap (Ply) Sheet / Flashing Cap (Ply) Sheet:

1. 145 mil mineral surfaced, polyurethane modified roofing membrane with fire retardant characteristics, and dual fiberglass reinforced scrim. ASTM D 6163, Type III Grade G

a. Tensile Strength, ASTM D 5147

1) 2 in/min. @ 73.4 +/- 3.6 deg. F MD 205 lbf/in XD 215 lbf/in

2) 50 mm/min. @ 23 +/- 2 deg. C MD 36.0 kN/m XD 38 kN/m

b. Tear Strength, ASTM D 5147

1) 2 in/min. @ 73.4 +/- 3.6 deg. F MD 300 lbf XD 300 lbf

2) 50 mm/min. @ 23 +/- 2 deg. C MD 1334 N XD 1334 N

c. Elongation at Maximum Tensile, ASTM D 5147

1) 2 in/min. @ 73.4 +/- 3.6 deg. F MD 4.7% XD 5.0%

2) 50 mm/min. @ 23 +/- 2 deg. C MD 4.7% XD 5.0%

d. Low Temperature Flexibility, ASTM D 5147, Passes 0 deg. F (-18 deg. C)

E. Interply Adhesive:

1. Generic Type IV Asphalt: Hot Bitumen, ASTM D 312, Type IV special steep asphalt having the following characteristics:

a. Softening Point 210 deg. F - 225 deg. F

b. Flash Point 500 deg. F

c. Penetration @ 77 deg. F 15-25 units

d. Ductility @ 77 deg. F 1.5 cm

F. Sealants:

1. Moisture-curing, single-component non-sag polyurethane sealant for use in expansion and control joints, reglets, precast panels, tiltup walls, metal curtain walls, copings, window and door perimeters, panel bedding and glazing details.

a. Tensile Strength, ASTM D 412 175 psi

b. Elongation, ASTM D 412 550%

c. 100% Modulus, ASTM C 719 65 psi

d. Adhesion-in-Peel, ASTM C 920 20 pli

G. Non-Shrink Grout: All weather fast setting chemical action concrete material to fill pitch pans.

1. Flexural Strength, ASTM C 78: (modified) 7 days 1100psi

2. High Strength, ASTM C 109: (modified) 24 days 8400lbs (3810kg)

H. Pitch Pocket Sealer: Two part, 100% solids, self-leveling, polyurethane sealant for filling pitch pans as recommended and furnished by the membrane manufacturer.

1. Durometer, ASTM D 2240: 40-50 Shore

2. Elongation, ASTM D 412: 250%

3. Tensile Strength, ASTM D 412: 200 @ 100 mil

PART 3 EXECUTION

3.1 EXAMINATION

A. Do not begin installation until substrates have been properly prepared.

B. Inspect and approve the deck condition, slopes and fastener backing if applicable, parapet walls, expansion joints, roof drains, stack vents, vent outlets, nailers and surfaces and elements. Verify that all welds are good, that deck is in plane and that it is free from damage and deflection.

07550-6

C. Verify that work penetrating the roof deck, or which may otherwise affect the roofing, has been properly completed.

D. If substrate preparation and other conditions are the responsibility of another installer, notify Architect of unsatisfactory preparation before proceeding.

3.2 PREPARATION

A. General: Clean surfaces thoroughly prior to installation.

1. Prepare surfaces using the methods recommended by the manufacturer for achieving the best result for the substrate under the project conditions.

2. Roof surface to receive roofing system shall be smooth, clean, free from loose gravel, dirt and debris, dry and structurally sound.

3. Wherever necessary, all surfaces to receive roofing materials shall be power broom and vacuumed to remove debris and loose matter prior to starting work.

4. Do not apply roofing during inclement weather. Do not apply roofing membrane to damp, frozen, dirty, or dusty surfaces.

3.3 INSTALLATION – GENERAL

A. Install modified bitumen membranes and flashings in accordance with manufacturer's instructions and with the recommendations provided by the National Roofing Contractors Association's Roofing & Waterproofing Manual, the Asphalt Roofing Manufacturers Association, and applicable codes.

B. Insurance/Code Compliance: Where required by code, install and test the roofing system to comply with governing regulation and specified insurance requirements.

C. General: Avoid installation of modified bitumen membranes at temperatures lower than 40- 45 degrees F. When work at such temperatures unavoidable use the following precautions:

1. Take extra care during cold weather installation and when ambient temperatures are affected by wind or humidity, to ensure adequate bonding is achieved between the surfaces to be joined. Use extra care at material seam welds and where adhesion of the applied product to the appropriately prepared substrate as the substrate can be affected by such temperature constraints as well.

2. Unrolling of cold materials, under low ambient conditions must be avoided to prevent the likelihood of unnecessary stress cracking. Rolls must be at least 40 degrees F at the time of application. If the membrane roll becomes stiff or difficult to install, it must be replaced with roll from a heated storage area.

D. Coordinate installation of roofing system components so that insulation and roofing plies are not exposed to precipitation or left exposed overnight. Provide cut-offs at end of each day’s work to cover exposed ply sheets and insulation with two (2) plies of #15 organic roofing felt set in full moppings of bitumen and with joints and edges sealed with roofing cement.

Remove cut-offs immediately before resuming work.

E. Asphalt Bitumin Heating: Heat and apply bitumen in accordance with the Equiviscous Temperature (EVT) Method as recommended by National Roofing Contractors Association (NRCA). Do not raise temperature above minimum normal fluid-holding temperature necessary to obtain EVT (plus 5 at point of application) more than one (1) hour prior to time of application. Determine flash point, finished blowing temperature, EVT, and fire-safe handling temperature of bitumen either from information by manufacturer or suitable test. Do not exceed recommended temperature limits during bitumen heating. Do not heat to a temperature higher than twenty five degrees (25) below flash point. Discard bitumen that has been held at temperature exceeding Finished Blowing Temperature (FBT) for more than three (3) hours. Keep kettle lid closed except when adding bitumen.

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F. Asphalt Bitumin Mopping Rate:

1. Interply Mopping: Apply bitumen at the rate of approximately twenty five (25) lb.(11.3kg) of bitumen per roof square.

2. Modified Membrane Mopping: Apply bitumen at the rate of approximately thirty (30) lb.(13.6kg) of bitumen per roof square.

G. Substrate Joint Penetrations: Prevent bitumen from penetrating substrate joints, entering building, or damaging roofing system components or adjacent building construction.

H. Apply roofing materials as specified by manufacturer’s instructions

1. Keep roofing materials dry before and during application.

2. Do not permit phased construction.

3. Complete application of roofing plies, modified sheet and flashing in a continuous operation.

4. Begin and apply only as much roofing in one day as can be completed that same day.

I. Commence installation of the roofing system at the lowest point of the roof (or roof area), working up the slope toward the highest point. Lap sheets shingle fashion so as to constantly shed water

3.4 ROOFING DEMOLITON / REPAIR OF WET AREAS

A. A moisture survey was performed. Wet areas to be torn out and built up to roof level with polyisocyanurate.

B. Tear off all flashings and dispose off site, and install new as per specification.

3.5 ROOF RECOVER PREPARATION

A. Verify that existing substrate is dry before proceeding with installation of cover board.

1. Existing gravel surfaced roof will be wet vacuumed. Any large asphalt accumulations must be spudded and removed to provide a smooth surface for application of recovery board.

2. Remove blisters, ridges, buckles and other substrate irregularities from existing roofing membrane that inhibit new recover boards from conforming to substrate.

B. After all gravel has been removed from the existing BUR and the surface has been properly cleaned apply a universal asphalt primer to the surface at a rate of ¼ - ½ gallon per square.

C. Properly adhere ½” Securock cover board with insulation adhesive.

D. East Roof Section Only: Install ¼” per foot tapered polyisocyanurate adhered with insulation adhesive with ½” start. Install ½” Securock cover board with Type IV asphalt.

Then install ½” per foot perlite or HD wood fiberboard insulation crickets between perimeter scuppers and between scuppers and walls with Type IV asphalt .

3.6 INSTALLATION HOT APPLIED ROOF SYSTEM

A. Base Sheet Installation:

1. Install base sheet in twenty five (25) lbs. per square of type IV hot asphalt shingled uniformly to achieve one or more plies over the entire prepared substrate. Shingle in direction of slope of roof to shed water on each area of roof. Do not step on base rolls until asphalt has cooled, fish mouths should be cut and patched.

2. Lap ply sheet ends 8 inches. Stagger end laps 12 inches minimum.

3. Once the roll is down, it must be in good contact with the cover board by lightly brooming to assure complete adhesion. It is important not to trap air under the membrane and to work out all air that may be trapped.

4. Extend plies 2 inches beyond top edges of cants at wall and roof projection and

07550-8 equipment bases.

5. Install base flashing ply to all perimeter and projection details after membrane application. Base flashings are to be constructed as one ply of modified base sheet and one ply of modified cap sheet.

B. Modified Cap Sheet Installation:

1. Solidly bond the 145 mil urethane modified membrane to the base sheet with specified material at the rate of twenty five (25) to thirty (30) lbs. (11-13kg) per 100 square feet.

2. Roll must push a puddle of hot material in front of it with material slightly visible at all side laps. Exercise care during application to eliminate air entrapment under the membrane.

3. Apply pressure to all seams to ensure that the laps are solidly bonded to substrate.

4. Install subsequent rolls of modified membrane as above with a minimum of 4 inch

(101 mm) side laps and 8 inch (203 mm) end laps. Stagger the end laps. Apply membrane in the same direction as the previous layers but stagger the laps so they do not coincide with the laps of the base layers.

5. Apply hot bitumin no more than 5 feet (1.5 m) ahead of each roll being embedded.

6. Extend membrane 2 inches (50 mm) beyond top edge of all cants in full moppings of the specified hot bitumin.

7. Loose roofing granules should be immediately broadcast into the asphalt bleed-out.

C. Flashing Membrane Installation:

1. Seal curb, wall and parapet flashings with an application of mastic and mesh on a daily basis. Do not permit conditions to exist that will allow moisture to enter behind, around or under the roof or flashing membrane.

2. Adhere to the underlying base flashing base ply with specified hot bitumin. Nail off at a minimum of 8 inches (203 mm) o.c. from the finished roof at all vertical surfaces.

3. Solidly adhere the entire flashing base ply to the substrate.

4. Seal all vertical laps of flashing ply with a three-course application of trowel-grade mastic and fiberglass mesh.

5. Coordinate counter flashing, cap flashings, expansion joints, and similar work with modified bitumen roofing work.

D. Application of Surfacing (Reflective Coating): ALTERNATE

1. Prior to installation of coating, obtain approval from manufacturer as to work completed. On average, at least 3-5 days are required prior to final surfacing.

2. Paint all exposed membrane with manufacturer’s non-fibrated aluminum paint installed at a rate of 0.75 gallon per square per coat. This shall be a two-coat application with the finished stroke in one direction. In colder weather wait 24 hours before applying the second coat.

E. Fibrous Cant Strips: Provide non-combustible 5” perlite or glass fiber cant strips at all wall/curb detail treatments where angle changes are greater than 45 degrees. Cant may be set in approved cold adhesives, hot asphalt or mechanically attached with approved plates and fasteners.

F. Wood Blocking and Nailers:

1. Replace deteriorated wood blocking as necessary and install additional wood blocking to perimeter as called out in details.

2. Wood nailers should match the height of any insulation, providing a smooth and even transition between flashing and insulation areas.

3. Nailer lengths should be spaced with a minimum 1/8 inch gap for expansion and contraction between each length or change of direction.

4. Nailers and flashings should be fastened in accordance with Factory Mutual "Loss

Prevention Data Sheet 1- 49, Perimeter Flashing" and be designed to be capable of resisting a minimum force of 200 lbs/lineal foot in any direction.

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G. Remove any obsolete rooftop equipment no longer in service as identified by owner.

H. Roof Walkway Pads: Provide walkway pads as shown on drawings spaced 18” apart.

Adhere pads with structural adhesive.

1. Trafgard Walkway Pads: 2’ x 6’ x ½”

I. All rooftop equipment including attached ladder shall be scraped and sanded to remove any loose or flaking paint and rust. Apply a direct to metal rust inhibitive primer and then paint with two coats of exterior oil based bronze paint. Ladder shall be painted to match exterior building.

J. Projections may need to be raised to the approved 8” minimum height. Contractor to verify prior to bidding on project. All items will be measured upon final completion.

K. Install overflow scuppers of same number and size a minimum of 2” of above the primary scuppers on applicable roof sections.

L. When possible use the Versa Line Flashing Detail in lieu of all pitch pans. This shall be determined during the pre-bid meeting.

M. Pitch pans, Rain Collar 24 gauge stainless or 20oz (567gram) copper. All joints should be welded/soldered watertight. Only if Versa Line Flashing Detail can’t be used.

N. Plumbing stacks should be 4lb (1.8kg) sheet lead formed and rolled.

3.7 INSTALLATION EDGE TREATMENT AND ROOF PENETRATION FLASHINGS

A. Roof Edge With Gutter:

1. Inspect the nailer to assure proper attachment and configuration. Increase slope at metal edge by additional degree of slope in first board.

2. Run one ply over the edge. Assure coverage of all wood nailers. Fasten plies with ring shank nails at 8 inches (203 mm) o.c.

3. Install gutter and strapping.

4. Install continuous cleat and fasten at 6 inches (152 mm) o.c.

5. Prime top and bottom metal edge at a rate of 100 square feet per gallon and allow to dry.

6. Install new metal edge hooked to continuous cleat and set in bed of roof cement.

Fasten flange to wood nailer every 3 inches (76 mm) o.c. staggered.

7. Strip in flange with base flashing ply covering entire flange in bitumen with 6 inches

(152 mm) onto the field of the roof. Assure ply laps do not coincide with metal laps.

8. Install a second ply of modified flashing ply in bitumen over the base flashing ply, 9 inches (228 mm) on to the field of the roof.

9. Install a bead polyurethane sealant along the mod-bit to metal edge to provide an extra layer of waterproofing.

10. No ponding water will be allowed along the roof edge with gutters.

B. Raised Metal Edge:

1. Inspect the nailer to assure proper attachment and configuration.

2. Run one ply over the edge. Assure coverage of all wood nailers. Fasten plies with ring shank nails at 8 inches (203 mm) o.c.

3. Install continuous cleat and fasten at 6 inches (152 mm) o.c.

4. Install new metal edge hooked to continuous cleat and set in bed of roof cement.

Fasten flange to wood nailer every 3 inches (76 mm) o.c. staggered.

5. Prime metal edge at a rate of 100 square feet per gallon and allow to dry.

6. Strip in flange with base flashing ply covering entire flange in bitumen with 6 inches

(152 mm) on to the field of roof. Assure ply laps do not coincide with metal laps.

7. Install a second ply of modified flashing ply in bitumen over the base flashing ply, 9

07550-10 inches (228 mm) on to the field of the roof.

C. Raised Metal Edge Cap:

1. Inspect the nailer to assure proper attachment and configuration.

2. Run one ply over the edge. Assure coverage of all wood nailers. Fasten plies with ring shank nails at 8 inches (203 mm) o.c.

3. Install continuous cleat and fasten at 6 inches (152 mm) o.c.

4. Strip in cant dam with base flashing ply covering entire vertical area in bitumen with 6 inches (152 mm) on to the field of the roof. Assure ply laps do not coincide with metal laps.

5. Install a second ply of modified flashing ply in bitumen over the base flashing ply, 9 inches (228 mm) on to the field of the roof.

6. Install new metal edge hooked to continuous cleat and set in bed of roof cement.

7. Attach metal edge with approved fasteners and neoprene washers at 8 inches (203

mm) o.c.

D. Equipment Support / Curb Detail-Air Handling Station / Exhaust Fan / Are Intake:

1. Minimum curb height is 8 inches (203 mm) above finished roof height. Prime vertical at a rate of 100 square feet per gallon and allow to dry.

2. Set cant in bitumen. Run all field plies over cant a minimum of 2 inches (50 mm).

3. Install base flashing ply covering curb set in bitumen with 6 inches (152 mm) on to field of the roof.

4. Install a second ply of modified flashing ply in bitumen over the base flashing ply, 9 inches (228 mm) on to the field of the roof. Attach top of membrane to top of curb and nail at 8 inches (203 mm) o.c. Apply a three-course application of mastic and mesh at all vertical seams and allow to cure and aluminize.

5. Install pre-manufactured cover. Fasten sides at 24 inches (609 mm) o.c. with fasteners and neoprene washers. Furnish all joint cover laps with butyl tape between metal covers.

6. Or Set equipment on neoprene pad and fasten as required by equipment manufacturer.

7. Or Install metal exhaust fan over the wood nailers and flashing to act as counterflashing. Fasten per manufacturer's recommendation.

8. Or install passive vent/air intake over the wood nailers and flashing to act as counterflashing. Fasten per manufacturer's recommendations.

E. Plumbing Stack:

1. Minimum stack height is 12 inches (609 mm).

2. Run roof system over the entire surface of the roof. Seal the base of the stack with elastomeric sealant.

3. Prime flange of new sleeve. Install properly sized sleeves set in 1/4 inch (6 mm) bed of roof cement.

4. Install base flashing ply in bitumen.

5. Install membrane in bitumen.

6. Caulk the intersection of the membrane with elastomeric sealant.

7. Turn sleeve a minimum of 1 inch (25 mm) down inside of stack.

F. Reglet Mounted Counterflashing:

1. Minimum flashing height is 8 inches (203 mm) above finished roof height. Maximum flashing height is 24 inches. Prime vertical wall at a rate of 100 square feet per gallon and allow to dry.

2. Set cant in bitumen. Run all field plies over cant a minimum of 2 inches (50 mm).

3. Install base flashing ply covering wall set in bitumen with 6 inches (152 mm) on to field of the roof.

4. Install a second ply of modified flashing ply in bitumen over the base flashing ply, 9 inches (228 mm) on to the field of the roof. Apply a three-course application of mastic

07550-11 and mesh at all vertical seams and allow to cure and aluminize.

5. Apply butyl tape to wall behind flashing. Secure termination bar through flashing, butyl tape and into wall. Alternatively use caulk to replace the butyl tape.

6. Cut reglet in masonry one joint above flashing.

7. Secure reglet counterflashing with expansion fasteners and caulk reglet opening with a polyurethane sealant.

G. Scupper Through Wall:

1. Inspect the nailer to assure proper attachment and configuration.

2. Run one ply over nailer, into scupper hole and up flashing as in typical wall flashing detail. Assure coverage of all wood nailers.

3. Install a scupper box in a 1/4 inch (6 mm) bed of mastic. Assure all box seams are soldered and have a minimum 4 inch (101 mm) flange. Make sure all corners are closed and soldered. Prime scupper at a rate of 100 square feet per gallon and allow to dry.

4. Fasten flange of scupper box every 3 inches (76 mm) o.c. staggered.

5. Strip in flange of scupper box with base flashing ply covering entire area with 6 inch

(152 mm) overlap on to the field of the roof and wall flashing.

6. Install a second ply of modified flashing ply in bitumen over the base flashing ply, 9 inches (228 mm) on to the field of the roof. Apply a three-course application of mastic and mesh at all seams.

H. Scupper Through Wall (Overflow):

1. Inspect the nailer to assure proper attachment and configuration.

2. Run one ply over nailer up the overflow, into the scupper hole and up flashing as in typical wall flashing detail. Assure coverage of all wood nailers.

3. Install scupper box in a 1/4 inch (6 mm) bed of mastic. Assure all box seams are soldered and have a minimum 4 inch (101 mm) flange. Make sure all corners are closed and soldered. Prime scupper at a rate of 100 square feet per gallon and allow to dry.

4. Fasten flange of scupper box every 3 inches (76 mm) o.c. staggered.

5. Strip in flange scupper box with base flashing ply covering entire area with 6 inch (152

mm) overlap on to the field of the roof and wall flashing.

6. Install a second ply of modified flashing ply in bitumen over the base flashing ply, 9 inches (228 mm) on to the field of the roof. Apply a three-course application of mastic and mesh at all seams.

I. Coping Cap:

1. Minimum flashing height is 8 inches (203 mm) above finished roof height. Maximum flashing height is 24 inches (609 mm). Prime vertical wall at a rate of 100 square feet per gallon and allow to dry.

2. Set cant in bitumen. Run all field plies over cant a minimum of 2 inches (50 mm).

3. Attach tapered board to top of wall.

4. Install base flashing ply covering entire wall and wrapped over top of wall and down face with 6 inches (152 mm) on to field of roof and set in cold asphalt. Nail membrane at 8 inches (203 mm) o.c.

5. Install a second ply of modified flashing ply in bitumen over the base flashing ply, 9 inches (228 mm) on to the field of the roof. Apply a three-course application of mastic and mesh at all seams and allow to cure and aluminize.

6. Install continuous cleat and fasten at 6 inches (152 mm) o.c. to outside wall.

7. Install new metal coping cap hooked to continuous cleat.

8. Fasten inside cap 24 inches (609 mm) o.c. with approved fasteners and neoprene washers through slotted holes, which allow for expansion and contraction.

J. Plumbing Stack:

1. Minimum stack height is 12 inches (609 mm).

07550-12

2. Run roof system over the entire surface of the roof. Seal the base of the stack with elastomeric sealant.

3. Prime flange of new sleeve. Install properly sized sleeves set in 1/4 inch (6 mm) bed of roof cement.

4. Install base flashing ply in bitumen.

5. Install membrane in bitumen.

6. Caulk the intersection of the membrane with elastomeric sealant.

7. Turn sleeve a minimum of 1 inch (25 mm) down inside of stack.

K. Versa Line Flashing:

1. Run all plies up to the penetration.

2. Place the Versa Line Flashing over the penetration and run cable or wire through

Flashing and prime all flanges.

3. Strip in flanges with one ply of base flashing ply. Extend 6 inches (152 mm) onto field of roof.

4. Install second layer of modified membrane extending 9 inches (228 mm) onto field of the roof.

5. Caulk joint between roof system and Versa Line Flashing with roof cement.

6. Insert foam plug into the opening (top / face) of the flashing with cable run through the split in the center of the foam plug.

7. Apply urethane sealant to secure the foam plug.

L. Pitch Pocket Umbrella: (only when Versa Line Flashing can’t be used):

1. Run all plies up to the penetration.

2. Place the pitch pocket over the penetration and prime all flanges.

3. Strip in flange of pitch pocket with one ply of base flashing ply. Extend 6 inches (152

mm) onto field of roof.

4. Install second layer of modified membrane extending 9 inches (228 mm) onto field of the roof.

5. Fill pitch pocket half full with non-shrink grout. Let this cure and top off with pourable sealant.

6. Caulk joint between roof system and pitch pocket with an elastomeric, asphaltic mastic.

7. Place a watershedding type bonnet over the top of the pitch pocket and clamp the top with a drawband collar. Caulk the upper edge of the band with a polyurethane elastomeric sealant.

8. All new pitch pans shall be no less than two (2") inches wider than any detail through them. Minimum height shall be three (3") inches.

M. Manufactured Wall Panel W/Modified Roof/Flashing (Slip Flashing):

1. Minimum flashing height is 8 inches (203 mm) above finished roof height. Prime vertical wall at a rate of 100 square feet per gallon and allow to dry.

2. Set cant in bitumen. Run all plies over cant a minimum of 2 inches (50 mm).

3. Install base flashing ply covering wall with 6 inches (152 mm) on to field of the roof.

4. Install a second ply of modified flashing ply in bitumen over the base flashing ply, 9 inches (228 mm) on to the field of the roof. Apply a three-course application of mastic and mesh at all vertical seams and allow to cure and aluminize.

5. Install manufacturer's standard hat channel into the top of the modified membrane to act as a termination bar.

6. Install hat channels at 24 inches (609 mm) o.c. vertically spaced up the wall.

7. Install the uppermost hat channel at the bottom edge of the coping cap. Insert rigid insulation between the hat channels. Place manufacturer's standard seam tape on top of all hat channels.

8. Fasten the first manufactured wall panel vertically plumb and fasten every ) inches (152 mm) o.c.

9. Install adjoining panels by engaging the opposing interlocking seam and fastening as

07550-13 described above.

10. Complete inside and outside corners by installing pre-fabricated corners or job site braking a full width panel to accommodate the corner, so that the sides engage the lock of the panels to the corner areas.

11. Trim excess seam tape and seam raw edges with manufacturer's recommended sealant.

12. Fasten slip flashing to existing coping cap with a waterproof rivet every 24 inches (609

mm) o.c. to act as a counterflashing over the manufactured wall panel.

3.8 SHEET METAL FLASHING AND TRIM

A. Metal Work:

1. Install new 24 ga. kynar coated metal counter flashings and trim work and install in accordance with the SMACNA "Architectural Sheet Metal Manual" or the NRCA Roofing Waterproofing manual.

2. Install new premanufactured 24 ga. kynar coated metal coping cap, metal edge, gutters and downspouts matching existing profile per shop drawings and install in accordance with the SMACNA "Architectural Sheet Metal Manual" or the NRCA Roofing Waterproofing manual.

3.9 PROTECTION

A. Provide traffic ways, erect barriers, fences, guards, rails, enclosures, chutes and the like to protect personnel, roofs and structures, vehicles and utilities.

B. Protect exposed surfaces of finished walls with tarps to prevent damage.

C. Plywood for traffic ways required for material movement over existing roofs shall be not less than 5/8 inch (16 mm) thick.

D. In addition to the plywood listed above, an underlayment of minimum 1/2 inch (13 mm) recover board is required on new roofing.

E. Special permission shall be obtained from the Manufacturer before any traffic shall be permitted over new roofing.

3.10 FIELD QUALITY CONTROL

A. Inspection: Provide manufacturer's field observations at start-up and at intervals of approximately 30 percent, 60 percent and 90 percent completion. Provide a final inspection upon completion of the Work.

1. Warranty shall be issued upon manufacturer's acceptance of the installation.

2. Field observations shall be performed by a Technical Representative employed full-time by the manufacturer and whose primary job description is to assist, inspect and approve membrane installations for the manufacturer.

3. Provide observation reports from the Technical Representative indicating procedures followed, weather conditions and any discrepancies found during inspection.

4. Provide a final report from the Technical Representative, certifying that the roofing system has been satisfactorily installed according to the project specifications, approved details and good general roofing practice.

3.11 CLEANING

A. Remove bitumen drippings from walls, windows, floors, ladders, and finished surfaces.

B. Repair or replace defaced or disfigured finishes caused by work of this section.

3.12 CONSTRUCTION WASTE MANAGEMENT

07550-14

A. Remove and dispose of waste products generated during roofing procedures. Comply with requirements of authorities having jurisdiction.

3.13 FINAL INSPECTION

A. At completion of installation and associated work, meet with Contractor, Architect, installer, installer of associated work, Owner, roofing system manufacturer’s representative, and other representatives directly concerned with performance of roofing system.

B. Inspect work and flashing of roof penetrations, walls, curbs and other equipment. List all items requiring correction or completion and furnish a copy of list to each party in attendance.

C. Repair or replace deteriorated or defective work found at time above inspection as required to a produce an installation which is free of damage and deterioration at time of Substantial Completion and according to warranty requirements.

D. Notify the Owner upon completion of corrections.

E. Following the final inspection, provide written notice of acceptance of the installation from the roofing system manufacturer.

F. Immediately correct roof leakage during construction. If the Contractor does not respond within twenty-four (24) hours, the Owner will exercise rights to correct the Work under the terms of the Conditions of the Contract.

3.14 DEMONSTRATION AND TRAINING

A. At a time and date agreed to by the Owner, instruct the Owner’s facility manager, or other representative designated by the Owner, on the following procedures:

1. Troubleshooting procedures.

2. Notification procedures for reporting leaks or other apparent roofing problems.

3. Maintenance.

4. The Owner’s obligations for maintaining the warranty in effect and force.

5. The Manufacturer’s obligations for maintaining the warranty in effect and force.

END OF SECTION

PermWall 1.0 Redstone Arsenal – Building 7290 Date

METAL WALL PANELS 074113 - 1

SECTION 074213 – METAL WALL PANELS

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.

1.2 SUMMARY.

A. Work described in this section includes concealed clip, lap-seam pre-formed metal wall panel system complete with clips, perimeter and penetration flashing and closures. Section also contains information on required hat channels.

1.3 DEFINITIONS

A. American Architectural Manufacturer Association (AAMA):

1. AAMA 621-96: Voluntary/Standard Specifications for High Performance Organic Coatings on Coil Coated Architectural Hot Dipped Galvanized (HDG) & Zinc-Aluminum Coated Steel Substrates

B. American Iron and Steel Institute (AISI):

1. S100-07: 2007 Edition of the North American Specification for the Design of Cold-Formed Steel Structural Members.

C. American Society for Testing and Materials (ASTM):

1. A653-03: Specification for Steel Sheet, Zinc-coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process.

2. A755–03: Standard Specification for Steel Sheet, Metallic Coated by the Hot-Dip Process and Prepainted by the Coil-Coating Process for Exterior Exposed Building Products.

3. A792-03: Specification for Steel Sheet, 55% Aluminum-Zinc Alloy-Coated by the Hot-Dip Process.

4. B209-02a: Specification for Aluminum and Aluminum-Alloy Sheet and Plate.

5. E283-04: Standard Test Method for Determining Rate of Air Leakage Through Exterior Windows, Curtain Walls, and Doors Under Specified Pressure Differences Across the Specimen.

6. E331-00(2009): Standard Test Method for Water Penetration of Exterior Windows, Curtain Walls, and Doors by Uniform Static Air Pressure Difference.

D. Sheet Metal and Air Conditioning Contractors National Association (SMACNA):

1. Architectural Sheet Metal Manual, 6th edition.

E. National Association of Architectural Metal Manufacturers (NAAMM)

1. Metal Finishes Manual for Architectural and Metal Products

METAL WALL PANELS 074113 - 2

1.4 DESIGN AND PERFORMANCE CRITERIA.

A. General Performance: Metal wall panel assemblies shall comply with performance requirements without failure due to defective manufacture, fabrication, installation, or other defects in construction.

B. Thermal Expansion and Contraction.

1. Completed metal wall panel and flashing system shall be capable of withstanding expansion and contraction of components caused by changes in temperature without buckling, or reducing performance ability.

2. The design temperature differential shall be not less than 220 degrees Fahrenheit.

3. Interface between panel and clip shall provide for unlimited thermal movement in each direction along the longitudinal direction.

C. Air Infiltration: Air leakage through assembly of not more than 0.06 cfm/sq. ft. (0.3 L/s per sq. m) of wall area when tested according to ASTM E 283 at the following test-pressure difference:

1. Test-Pressure Difference: 6.24 lbf/sq. ft. (300 Pa).

D. Water Penetration under Static Pressure: No water penetration when tested according to ASTM E 331 at the following test-pressure difference:

1. Test-Pressure with no leakage: 5 Gal/Hr per S.F. and Static Air Pressure of 20.0 psf (575 Pa) for 15 min.

1.5 SUBMITTALS.

A. Shop drawings: Show wall panel system with flashings and accessories in elevation, sections, and details. Include metal thicknesses and finishes, panel lengths, joining details, anchorage details, flashings and special fabrication provisions for termination and penetrations. Indicate relationships with adjacent and interfacing work. Shop drawings to be prepared by metal wall panel manufacturer.

B. Financial Certification: Provide the building owner with a signed and notarized (sealed) affidavit by an officer of the panel system manufacturer which confirms a current minimum corporate asset-to-liability ratio of not less than 3:1 for the panel manufacturer, or its parent corporation. Financial support information and affidavit must be dated within 30 days prior to the product submittal.

C. Design Test Reports.

1. Submit copies of design test reports for each of the performance testing standards listed in specification article 1.4.

2. Test reports shall be performed by independent, accredited testing laboratories, and shall…