CITY_HALL_SPEC.pdf

07 52 00 -1

SECTION 07 52 00

MODIFIED BITUMINOUS MEMBRANE ROOFING

City of Chino City Hall Building

PART 1 GENERAL

1.1 SECTION INCLUDES

A. Cold Applied 2-Ply Solvent Free Asphalt Roofing

1.2 SCOPE OF WORK (City Hall)

1. Remove existing roofing system down to decking and dispose of properly.

2. Inspect decking and replace any rotted or damaged decking with like kind.

3. Add crickets to create proper drainage if necessary.

4. Install 1/4” pre-primed gypsum board over wood deck per wind up lift calculations.

5. Install Stressbase 80 plus over base sheet with Green-Lock Membrane adhesive at a rate of 2.0-2.5 gallons per square within field and at all angles and flashings.

6. Install Stressply Plus FR Mineral over ply sheet with Green-Lock Membrane adhesive at a rate of 2.0-2.5 gallons per square.

7. All base flashings and vertical surfaces require use of trowel grade Green-Lock Flashing adhesive.

8. Once roofing system has sufficiently cured, install Pyramic roof coating over cap sheet membrane per manufactures instructions in 2 coats for a total of 2.0 gallons per square.

9. Install Cool-Sil around drains.

10. Install new 22 gauge Kynar coated metal coping and edge metal per manufactures details.

Color TBD by owner.

11. Install Cool-Sil Silicone coating at 3’ width from center of water ways at 3.0 gallons per square.

12. Install new roof jacks around all pipe penetrations.

13. Install Dura-Blok under any conduit.

1.3 REFERENCES

A. ASTM D 6162 Standard Specification for Styrene Butadiene Styrene (SBS) Modified Bituminous Sheet Materials Using a Combination of Polyester and Glass Fiber Reinforcements.

B. ASTM D 6163 Standard Specification for Styrene Butadiene Styrene (SBS) Modified Bituminous Sheet Materials Using Glass Fiber Reinforcements.

C. ASTM D 6757 - Standard Specification for Underlayment Felt Containing Inorganic Fibers Used in Steep-Slope Roofing.

07 52 00 -2

D. ASTM E 108 - Standard Test Methods for Fire Test of Roof Coverings.

E. National Roofing Contractors Association (NRCA): Roofing and Waterproofing Manual.

F. Sheet Metal and Air Conditioning Contractors National Association, Inc. (SMACNA) - Architectural Sheet Metal Manual.

G. Underwriters Laboratories, Inc. (UL): Fire Hazard Classifications.

H. Intertek/Warnock Hersey (WH): Fire Hazard Classifications.

I. ANSI-SPRI ES-1 Wind Design Standard for Edge Systems used with Low Slope Roofing Systems.

J. ASCE 7, Minimum Design Loads for Buildings and Other Structures.

K. California Title 24 Energy Efficient Standards.

1.4 DESIGN / PERFORMANCE REQUIREMENTS

A. Perform work in accordance with all federal, state and local codes.

B. Exterior Fire Test Exposure: Roof system shall achieve WH Class rating for roof slopes indicated on the Drawings as follows:

1. Intertek/Warnock Hersey Class A Rating.

C. Design Requirements:

1. Uniform Wind Uplift Load Capacity

a. Installed roof system shall withstand negative (uplift) design wind loading pressures complying with the following criteria.

1) Design Code: ASCE 7, Method 2 for Components and Cladding.

2) Importance Category:

a) IV

3) Importance Factor of:

a) 1.15

4) Wind Speed: 105 mph

D. Roof system shall have been tested in compliance with the following codes and test requirements:

1. Cool Roof Rating Council:

a. CRRC Directory CRRC

2. International Code Council Evaluation Service (ICC-ES):

a. Membrane Systems:

1) ESR

1.5 SUBMITTALS

A. Product Data: Manufacturer's data sheets on each product to be used, including:

1. Preparation instructions and recommendations.

2. Storage and handling requirements and recommendations.

3. Installation instructions.

B. Design Pressure Calculations: Submit design pressure calculations for the roof area in accordance with ASCE 7 and local Building Code requirements. Include a roof system attachment analysis report, certifying the system's compliance with applicable wind load requirements before Work begins.

C. Warranty Sample: Provide unexecuted copy of 30-Year NDL Warranty.

07 52 00 -3

D. Manufactures Inspections: Provide letter from corporate officer of manufacture stating intent to provide inspections (3) per week, during project as outlined in section 3.8 “Field Quality Control”.

E. Verification Samples: For each modified bituminous membrane ply product specified, two samples, minimum size 6 inches (150 mm) square, representing actual product, color, and patterns.

F. Manufacturer's Certificates: Provide to certify products meet or exceed specified requirements.

G. Test Reports: Submit test reports, prepared by an independent testing agency, for all modified bituminous sheet roofing, indicating compliance with ASTM D5147.

H. Manufacturer's Fire Compliance Certificate: Certify that the roof system furnished is approved by Warnock Hersey (WH) or approved third party testing facility in accordance with ASTM E108, Class A for external fire and meets local or nationally recognized building codes.

I. 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.

1.6 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.

F. Source Limitations: Obtain all components of metal and low slope 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.

1.7 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:

07 52 00 -4

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.

1.8 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 50-degree F (10 degree C) and below 80-degree F (27 degree C). Area of storage shall be constructed for flammable storage.

1.9 COORDINATION

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

1.10 PROJECT CONDITIONS

A. Maintain environmental conditions (temperature, humidity, and ventilation) within limits recommended by manufacturer for optimum results. Do not install products under environmental conditions outside manufacturer's absolute limits.

1.11 WARRANTY

A. Upon completion of the work, provide the Manufacturer's written and signed Warranty, warranting that, if a leak develops in the roof during the term of this warranty, due to defective material or workmanship, 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, in accordance with the terms of the Manufacturer's warranty, warranty requirements and limitations.

B. Warranty Terms

1. Manufacturer’s warranty shall be a total systems warranty including modified cap membrane, modified base sheet, roof coating and sheet metal flashings. The same company shall manufacture/supply/guarantee the roof coating, modified cap membrane, modified base sheet, accessories and sheet metal flashings. This composite warranty shall provide the City with a single source of liability by guaranteeing these components of the waterproofing systems

2. Warranty Period:

07 52 00 -5

a. 30 years from date of acceptance.

C. 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. 5 years from date of acceptance.

PART 2 PRODUCTS

2.1 MANUFACTURERS

A. Acceptable Manufacturer: Garland Company, Inc. (The); 3800 E. 91st St., Cleveland, OH 44105. ASD. Toll Free: 800-321-9336. Phone: 216-641-7500. Fax: 216-641-0633 or equal.

B. Coverboard: Fastened to the prepared deck per wind uplift calculations.

1. Pre-primed gypsum board:

a. Thickness: ¼”

C. Base (Ply) Sheet: One ply bonded to the prepared substrate with Interply Adhesive:

1. StressBase 80 Plus:

D. Modified Cap (Ply) Sheet: One ply bonded to the prepared substrate with interplay adhesive.

1. StressPly Plus FR Mineral:

E. Interply Adhesive: (Layer 1 and 2)

1. Green-Lock Plus Membrane Adhesive:

F. Flashing Base Ply: One ply bonded to the prepared substrate with Interply Adhesive: except torch sheet.

1. StressBase 80 Plus:

G. Flashing Cap (Ply) Sheet: One ply bonded to the prepared substrate with Interply Adhesive:

except torch sheet.

1. StressPly Plus FR Mineral:

H. Flashing Ply Adhesive:

1. Green-Lock Plus Flashing Adhesive:

I. Surfacing: Requires 30-day wait before applying.

1. Surface Coatings:

a. Pyramic:

2.2 ACCESSORIES:

A. Roof Insulation: Provide DenDeck Prime, G-P Gypsum DenDeck DuraGuard, USG Securock with fiberglass facer for proper adhesion of the self-adhered base sheet.

B. Nails and Fasteners: Non-ferrous metal or galvanized steel, except that hard copper nails shall be used with copper; aluminum or stainless-steel nails shall be used with aluminum;

and stainless-steel nails shall be used with stainless steel, Fasteners shall be self-clinching type of penetrating type as recommended by the deck manufacturer. Fasten nails and fasteners flush-driven through flat metal discs not less than 1 inch (25 mm) diameter. Omit metal discs when one-piece composite nails or fasteners with heads not less than 1 inch (25

mm) diameter are used.

C. Walkway Pads - Wise Product Group Walkway Pads: As recommended and furnished by the membrane manufacturer set in approved adhesive to control foot traffic on roof top surface and provide a durable system compliant non-slip walkway.

07 52 00 -6

2.3 EDGE TREATMENT AND ROOF PENETRATION FLASHINGS

A. Vents and Breathers: Heavy gauge aluminum and fully insulated vent that allows moisture and air to escape but not enter the roof system as recommended and furnished by the membrane manufacturer.

B. Drain Flashings should be 4lb (1.8kg) sheet lead formed and rolled.

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

D. Liquid Flashing - Tuff-Flash Plus LO: An asphaltic-polyurethane, low odor, liquid flashing material designed for specialized details unable to be waterproofed with typical modified membrane flashings.

1. Tensile Strength, ASTM D 412: 650 psi.

2. Elongation, ASTM D 412: 325%

3. Density @77 deg. F 8.3 lb/gal typical.

E. Fabricated Flashings:

1. Fabricated flashings and trim shall conform to the detail requirements of SMACNA

"Architectural Sheet Metal Manual" and/or the CDA Copper Development Association "Copper in Architecture - Handbook" as applicable.

F. Manufactured Roof Specialties:

1. Manufactured roof specialties shall conform to the detail requirements of SMACNA

"Architectural Sheet Metal Manual" and/or the NRCA "Roofing and Waterproofing Manual" as applicable.

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.

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. Fill substrate surface voids that are greater than 1/4 inch wide with an acceptable fill material.

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

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

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

6. Fasteners and plates for fastening components mechanically to the substrate shall provide a minimum pull-out capacity of 300 lbs. (136 k) per fastener. Base or ply

07 52 00 -7 sheets attached with cap nails require a minimum pullout capacity of 40 lb. per nail.

7. Prime decks where required, in accordance with requirements and recommendations of the primer and deck manufacturer.

B. Wood Deck:

1. Dimensional wood deck shall be minimum 1 inch (25 mm) thick, knotholes and cracks larger than 1/4 inch shall be covered with sheet metal. All boards shall be appropriately nailed and have adequate end bearing to the centers of beams/rafters.

Lumber shall be kiln dried.

2. Plywood shall be a minimum 15/32 inch (11.9 mm) thick and conform to the standards and installation requirements of the American Plywood Association (APA).

3. If no roof insulation is specified, provide a suitable dry sheathing paper, followed by an approved base sheet nailed appropriately for the specified roof system, with 1 inch (25

mm) diameter caps and annular nails unless otherwise required by the applicable Code or Approval agency.

4. Insulation is to be mechanically attached in accordance with the insulation manufacturer's recommendations unless otherwise required by the applicable Code.

5. In all retrofit roof applications, it is required that deck be inspected for defects. Any defects are to be corrected per the deck manufacturer's recommendations and standards of the APA/Engineered Wood Association prior to new roof application.

6. Light metal wall ties or other structural metal exposed on top of the wood deck shall be covered with one ply of a heavy roofing sheet, such as HPR Glasbase Base Sheet, extending 2 inches to 6 inches (51 mm to 152 mm) beyond the metal in all directions.

Nail in place before applying the base ply.

C. Re-Roofing Applications:

1. Remove existing roof flashings from curbs and parapet walls down to the surface of the roof. Remove existing flashings at roof drains and roof penetrations.

2. Remove all wet, deteriorated, blistered or delaminated roofing membrane or insulation and fill in any low spots occurring as a result of removal work to create a smooth, even surface for application of new roof membranes.

3. Install new wood nailers as necessary to accommodate insulation/recovery board or new nailing patterns.

4. When mechanically attached, the fastening pattern for the insulation/recovery board shall be as recommended by the specific product manufacturer.

5. Existing roof surfaces shall be primed as necessary with asphalt primer meeting ASTM D 41 and allowed to dry prior to installing the roofing system.

D. Insulation:

1. All joints between layers should be staggered when multiple layers of insulation are installed. Insulation greater than 2.5 inches shall be installed in multiple layers.

2. Insulation shall be kept dry at all times. Install only as much insulation as can be covered with completed roofing membrane before the end of the day's work or prior to onset of inclement weather.

3. Edges shall butt tightly and all cuts shall fit neatly against adjoining surfaces to provide a smooth overall surface. Gaps of greater than 1/4 inch width shall be filled with insulation.

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.

07 52 00 -8

B. 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.

C. 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

D. All slopes greater than 2:12 require back-nailing to prevent slippage of the ply sheets. Use ring or spiral-shank 1 inch cap nails, or screws and plates at a rate of 1 fastener per ply (including the membrane) at each insulation stop. Place insulation stops at 16 ft o.c. for slopes less than 3:12 and 4 feet o.c. for slopes greater than 3:12. On non-insulated systems, nail each ply directly into the deck at the rate specified above. When slope exceeds 2:12, install all plies parallel to the slope (strapping) to facilitate backnailing. Install 4 additional fasteners at the upper edge of the membrane when strapping the plies.

3.4 INSTALLATION COLD APPLIED ROOF SYSTEM

A. Base Ply: Cut base ply sheets into 18-foot lengths and allow plies to relax before installing.

Install base sheet in interply adhesive applied at the rate required by the manufacturer.

Shingle base sheets uniformly to achieve one ply throughout over the prepared substrate.

Shingle in proper direction to shed water on each large area of roofing.

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

2. Solidly bond to the substrate and adjacent ply with specified cold adhesive at the rate of 2 to 2-1/2 gallons per 100 square feet.

3. Roll must push a puddle of adhesive in front of it with adhesive slightly visible at all side laps. Use care to eliminate air entrapment under the membrane.

4. Install subsequent rolls of modified across the roof as above with a minimum of 4-inch side laps and 8-inch staggered end laps. Lay modified membrane in the same direction as the underlayers but the laps shall not coincide with the laps of the base layers.

5. Extend plies 2 inches beyond top edges of cants at wall and projection bases.

6. Install base flashing ply to all perimeter and projection details.

7. Allow the one ply of base sheet to cure at least 30 minutes before installing the modified membrane. However, the modified membrane must be installed the same day as the base plies.

B. Modified Cap Ply(s): Cut cap ply sheets into 18-foot lengths and allow plies to relax before installing. Install in interply adhesive applied at the rate required by the manufacturer.

Shingle sheets uniformly over the prepared substrate to achieve the number of plies specified. Shingle in proper direction to shed water on each large area of roofing.

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

2. Solidly bond to the base layers with specified cold adhesive at the rate of 2 to 2-1/2 gallons per 100 square feet.

3. Roll must push a puddle of adhesive in front of it with adhesive slightly visible at all side laps. Care should be taken to eliminate air entrapment under the membrane.

4. Install subsequent rolls of modified across the roof as above with a minimum of 4-inch side laps and 8-inch staggered end laps. Lay modified membrane in the same direction as the underlayers but the laps shall not coincide with the laps of the base

07 52 00 -9 layers.

5. Extend membrane 2 inches beyond top edge of all cants in full mopping's of the cold adhesive as shown on the Drawings.

C. Fibrous Cant Strips: Provide non-combustible 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.

D. Wood Blocking, Nailers and Cant Strips:

1. Provide nailers at all roof perimeters and penetrations for fastening membrane flashings and sheet metal components.

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.

E. Metal Work: Install in accordance with the SMACNA "Architectural Sheet Metal Manual" or the NRCA Roofing Waterproofing manual.

F. Termination Bar: Provide a metal termination bar or approved top edge securement at the terminus of all flashing sheets at walls and curbs. Fasten the bar a minimum of 8 inches (203

mm) o.c. to achieve constant compression. Provide suitable sealant at the top edge if required.

G. Flashing Base Ply: Install flashing sheets by the same application method used for the base ply.

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. Prepare all walls, penetrations, expansion joints and where shown on the Drawings to be flashed with required primer at the rate of 100 square feet per gallon. Allow primer to dry tack free.

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

4. Solidly adhere the entire flashing ply to the substrate.

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

6. Coordinate roof accessories, miscellaneous sheet metal accessory items, including piping vents and other devices with the roofing system work.

7. Secure the top edge of the flashing sheet using a termination bar only when the wall surface above is waterproofed or nailed 4 inches o.c. and covered with an acceptable counter flashing.

H. Flashing Cap Ply:

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. Prepare all walls, penetrations, expansion joints and where shown on the Drawings to be flashed with required primer at the rate of 100 square feet per gallon. Allow primer to dry tack free.

3. Adhere to the underlying base flashing ply with specified flashing ply adhesive unless otherwise specified. Nail off at a minimum of 8 inches (203 mm) o.c. from the finished

07 52 00 -10 roof at all vertical surfaces.

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

5. Coordinate roof accessories, miscellaneous sheet metal accessory items with the roofing system work.

6. All stripping shall be installed prior to flashing cap sheet installation.

7. Heat and scrape granules when welding or adhering at cut areas and seams to granular surfaces at all flashings.

8. Secure the top edge of the flashing sheet using a termination bar only when the wall surface above is waterproofed or nailed 4 inches o.c. and covered with an acceptable counter flashing.

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

I. Surface Coatings: Apply roof coatings in strict conformance with the manufacturer's guidance on cure time and preparation.

J. Roof Walkways: Provide walkways in areas indicated on the Drawings.

3.5 INSTALLATION EDGE TREATMENT AND ROOF PENETRATION FLASHING

A. Metal Edge:

1. Inspect the nailers 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 nailers 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. Do not prime for Green-Lock System lightly sand metal to improve bond.

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 inches (228 mm) on to the field of the roof. Seal outside edge with rubberized cement.

B. Coping Cap:

1. Install in accordance with manufacturer details.

2. Minimum flashing height is 8 inches (203 mm) above finished roof height. Maximum flashing height is 24 inches (609 mm). Prime vertical wall and allow to dry.

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

4. Install base flashing ply covering entire wall and wrapped over top of wall and down face with 6 inches (152 mm) on to the base field ply and set in bitumen or adhesive.

Nail base flashing ply at 8 inches (203 mm) o.c. on the back side of the parapet wall.

5. Then install thermoplastic cap field ply run over the base flashing ply in bitumen or foam adhesive.

6. Install a second ply of thermoplastic flashing cap ply heat welded over the thermoplastic cap field ply, 9 inches (228 mm) onto the field of the roof.

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

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

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

C. 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.

07 52 00 -11

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.

D. Passive Vent/Air Intake:

1. Install in accordance with manufacturer details.

2. Minimum curb height is 8 inches (203 mm) above finished roof height. Prime vertical and allow to dry.

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

4. Install base flashing ply covering wall set in bitumen with 6 inches (152 mm) onto the base field ply and set in bitumen.

5. Then install thermoplastic cap field ply run over the base flashing ply in bitumen or foam adhesive.

6. Install the thermoplastic flashing ply in flashing adhesive over the base flashing ply, 9 inches (228 mm) onto the field of the roof.

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

E. Plumbing Stack:

1. Install in accordance with manufacturer details.

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

3. Run roof base ply over the entire surface of the roof. Seal the base of the stack with elastomeric sealant.

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

5. Install base flashing ply in bitumen or adhesive.

6. Install thermoplastic cap ply in bitumen or foam adhesive.

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

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

F. Curb Detail/Air Handling Station:

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. Apply a three-course application of mastic and mesh at all vertical seams and allow to cure and aluminize.

5. Install pre-manufactured counterflashing with fasteners and neoprene washers or per manufacturer's recommendations.

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

G. Pre-manufactured Curb For Equipment Support:

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. Run all field plies over cant of the pre-manufactured equipment support a minimum of

2 inches.

3. Install base flashing ply covering pre-manufactured curb with 6 inches (152 mm) on to

07 52 00 -12 field of the roof.

4. Install a second ply of modified flashing ply installed over the base flashing ply, 9 inches (228 mm) on to field of the roof. Attach top of membrane to top of wood 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. Set equipment on neoprene pad and fasten as required by equipment manufacturer.

H. Exhaust Fan:

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 plies over cant a minimum of 2 inches (50 mm).

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

4. Install a second ply of modified flashing ply installed over the base flashing ply, 9 inches (228 mm) on to field of the roof. Attach top of membrane to top of wood 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 metal exhaust fan over the wood nailers and flashing to act as counterflashing.

Fasten per manufacturer's recommendation.

I. Roof Drain:

1. Plug drain to prevent debris from entering plumbing.

2. Taper insulation to drain minimum of 24 inches (609 mm) from center of drain.

3. Run roof system plies over drain. Cut out plies inside drain bowl.

4. Set lead/copper flashing (30 inch square minimum) in 1/4 inch bed of mastic. Run lead/copper into drain a minimum of 2 inches (50 mm). Prime lead/copper at a rate of 100 square feet per gallon and allow to dry.

5. Install base flashing ply (40 inch square minimum) in bitumen.

6. Install modified membrane (48 inch square minimum) in bitumen.

7. Install clamping ring and assure that all plies are under the clamping ring.

8. Remove drain plug and install strainer.

J. Heat 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 modified membrane in bitumen.

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

7. Install new collar over cape. Weld collar or install stainless steel draw brand.

K. Reglet Mounted Counterflashing:

1. Install in accordance with manufacturer details.

2. Minimum flashing height is 8 inches (203 mm) above finished roof height. Maximum flashing height is 24 inches. Prime vertical wall and allow to dry.

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

4. Install base flashing ply covering wall set in bitumen or adhesive with 6 inches (152

mm) onto the base field ply.

5. Then install thermoplastic cap field ply run over the base flashing ply in bitumen or foam adhesive.

6. Install the thermoplastic flashing ply in flashing adhesive over the base flashing ply, 9

07 52 00 -13 inches (228 mm) onto the field of the roof.

7. 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.

8. Cut reglet in masonry one joint above flashing.

9. Secure reglet counterflashing with expansion fasteners and caulk reglet opening.

3.6 CLEANING

A. Clean-up and remove daily from the site all wrappings, empty containers, paper, loose particles and other debris resulting from these operations.

B. Remove asphalt markings from finished surfaces.

C. Repair or replace defaced or disfigured finishes caused by Work of this section.

3.7 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.

3.8 FIELD QUALITY CONTROL

A. Inspection: Provide manufacturer's field observations at intervals of at least (3) days per week.

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

2. Field observations shall be performed by a Sales 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 Sales Representative indicating procedures followed, weather conditions and any discrepancies found during inspection.

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

3.9 SCHEDULES

A. Base (Ply) Sheet:

1. StressBase 80 Plus: 80 mil SBS (Styrene-Butadiene-Styrene) rubber modified roofing base sheet reinforced with a fiberglass scrim. ASTM D 6163, Type I.

a. Tensile Strength, ASTM D 6163

1) 0.08 in/min. @ 0 +/-3.6 deg. F MD 140 lbf/in XD 100 lbf/in

2) 2 mm/min. @ -18 +/- -3 deg. C MD 24.5 kN/m XD 17.5 kN/m

b. Tear Strength, ASTM D 6163

1) 0.08 in/min. @ 0 +/- 3.6 deg. F MD 130 lbf XD 100 lbf

2) 2 mm/min. @ -18 +/- 3 deg. C MD 578 N XD 444 N

c. Elongation at Maximum Tensile, ASTM D 6163

1) 0.08 in/min. @ 0 +/- 3.6 deg. F MD 4 % XD 4 %

07 52 00 -14

2) 2 mm/min. @ -18 +/- 3 deg. C MD 4 % XD 4 %

d. Low Temperature Flexibility, ASTM D 6163, Passes -40 deg. F (-40 deg. C)

B. Modified Cap (Ply) Sheet:

1. StressPly Plus FR Mineral: 155 mil SBS (Styrene-Butadiene-Styrene) mineral surfaced, rubber modified roofing membrane reinforced with a fiberglass and polyester composite scrim. ASTM D 6162, Type III Grade G

a. Tensile Strength, ASTM D 5147

1) 2 in/min. @ 73.4 +/- 3.6 deg. F MD 310 lbf/in XD 310 lbf/in

2) 50 mm/min. @ 23 +/- 2 deg. C MD 54.25 kN/m XD 54.25 kN/m

b. Tear Strength, ASTM D 5147

1) 2 in/min. @ 73.4 +/- 3.6 deg. F MD 500 lbf XD 500 lbf

2) 50 mm/min. @ 23 +/- 2 deg. C MD 2224 N XD 2224 N

c. Elongation at Maximum Tensile, ASTM D 5147

1) 2 in/min. @ 73.4 +/- 3.6 deg. F MD 8% XD 8%

2) 50 mm/min. @ 23 +/- 2 deg. C MD 8% XD 8%

d. Low Temperature Flexibility, ASTM D 5147, Passes -30 deg. F ( -34 deg. C)

C. Interply Adhesive:

1. Green-Lock Plus Membrane Adhesive: Cold applied solvent free membrane adhesive:

low V.O.C. compliant performance requirements:

a. Non-Volatile Content ASTM D 4586 100%

b. Density ASTM D 1475 11.4 lbs./gal. (1.47 g/cm3)

c. Viscosity Brookfield Spindle T-E at 5 rpm 124,000 cPs.

d. Flash Point ASTM D 93 375 deg. F min. (232 deg. C)

e. Slope: up to 3:12

D. Flashing Base Ply:

1. StressBase 80 Plus: 80 mil SBS (Styrene-Butadiene-Styrene) rubber modified roofing base sheet reinforced with a fiberglass scrim ASTM D 6163, Type I.

a. Tensile Strength, ASTM D 5147

1) 0.08 in/min. @ 0 +/-3.6 deg. F MD 140 lbf/in XD 100 lbf/in

2) 2 mm/min. @ -18 +/- -3 deg. C MD 24.5 kN/m XD 17.5 kN/m

b. Tear Strength, ASTM D 5147

1) 0.08 in/min. @ 0 +/- 3.6 deg. F MD 130 lbf XD 100 lbf

2) 2 mm/min. @ -18 +/- 3 deg. C MD 578 N XD 444 N

c. Elongation at Maximum Tensile, ASTM D 5147

1) 0.08 in/min. @ 0 +/- 3.6 deg. F MD 4 % XD 4 %

2) 2 mm/min. @ -18 +/- 3 deg. C MD 4 % XD 4 %

d. Low Temperature Flexibility, ASTM D 6163, Passes -40 deg. F (-40 deg. C)

E. Flashing Cap (Ply) Sheet:

1. StressPly Plus FR Mineral: 155 mil SBS (Styrene-Butadiene-Styrene) mineral surfaced, rubber modified roofing membrane reinforced with a fiberglass and polyester composite scrim. ASTM D 6162, Type III Grade G

a. Tensile Strength, ASTM D 5147

1) 2 in/min. @ 73.4 +/- 3.6 deg. F MD 310 lbf/in XD 310 lbf/in

2) 50 mm/min. @ 23 +/- 2 deg. C MD 54.25 kN/m XD 54.25 kN/m

b. Tear Strength, ASTM D 5147

1) 2 in/min. @ 73.4 +/- 3.6 deg. F MD 500 lbf XD 500 lbf

2) 50 mm/min. @ 23 +/- 2 deg. C MD 2224 N XD 2224 N

c. Elongation at Maximum Tensile, ASTM D 5147

1) 2 in/min. @ 73.4 +/- 3.6 deg. F MD 8% XD 8%

2) 50 mm/min. @ 23 +/- 2 deg. C MD 8% XD 8%

d. Low Temperature Flexibility, ASTM D 5147, Passes -30 deg. F (-34 deg. C)

F. Flashing Ply Adhesive:

07 52 00 -15

1. Green-Lock Plus Flashing Adhesive: Cold applied solvent free flashing adhesive: low V.O.C.

a. Non-Volatile Content ASTM D 4586 100%

b. Density ASTM D 1475 11.8 lbs./gal. (1.17 g/cm3)

c. Viscosity Brookfield. 122,500 cPS

d. Flash Point ASTM D 93 375 deg. F min. (191 deg. C)

G. Surfacing:

1. Surface Coatings:

a. Surfacing:

1) Pyramic: White elastomeric, acrylic roof coating:

a) Weight/Gallon 11.7 lbs./gal. (1.40 g/cm3)

b) Non-Volatile % (ASTM D 1644) 63% min

c) Reflectance 83%

END OF SECTION