14-Scope of Work.pdf

6829 W. Corrine Dr. 623-878-7117 Peoria, AZ 85381

Roof Construction Requirements

1. Roof deck must be cleared of all debris.

2. All roof slopes must be properly sloped to the drains. All drains and scuppers must be a minimum

1-1/2” below roof surface. Overflows shall be 2” above primary drain.

3. All drains must be sumped and made of steel.

4. All drains must be blocked to prevent debris from entering the drains. The drain blocks must be removed at the end of each workday.

5. All curbs must be built to meet the minimum height of 8” above the finished roof surface. (Roof surface includes the crickets)

6. All penetrations must be a minimum height of 8” above finished roof surface.

7. All curbs and penetrations must have a minimum 18” separation between each other, walls and cricket valleys.

8. No PVC jacks will be permitted.

9. No wood is permitted to be used as supports for units or pipes and conduits.

10. No unistruts permitted.

11. All flashing jacks must have a minimum 4” base flange on all sides.

12. Core samples may be taken and the roofing contractor will be responsible for making all repairs at no additional charge.

13. The roofing will be watertight at the end of each day.

14. An area free of obstruction and debris will be made available for the staging of materials and equipment.

15. Roofing debris will be gathered and secured in trash bags daily and removed from the roof in a timely manner.

16. Manufacturer shall provide a list to the consultant of personnel on the job that have completed the minimum 4 hour manufacturer accreditation.

17. Roofing contractor will be required to complete a daily work report detailing the work completed along with weather conditions and area of the roof work. That report shall be turned into the consultant daily.

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SCOPE OF WORK

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PROJECT IDENTIFICATION

PROJECT NAME: MCCCD

PROJECT: MCC Bldg. 50

SITE ADDRESS: 1833 W. Southern Ave.

Mesa AZ 85202 City State ZIP Code

SCOPE OF WORK

Roof Section 1 & 10

1. Tear off the existing R-Mer-Lite roof system and insulation down to the concrete substrate.

2. One split system and one cooler to be removed and disposed of properly. Infill substrate above duct with 1/4" steel that is pinned to the substrate.

3. Remove all wall counter flashings and set to the side for reinstall.

4. Wall flashings around mechanical room (roof 10) will have to be replaced with new metal flashings.

5. Raise all penetrations, protrusions, curbs to a minimum 8” above the finished roof surface.

6. Replace existing turtle roof vents with new 12”x12” box vents that are 8” above the finished roof surface.

7. Electrical penetrations to be set and fastened per code requirements.

8. Clean and prime concrete substrate per the manufacturer’s requirements.

9. Install a self-adhered primeless non permeable air and vapor barrier.

10. Install a 2”x6” wood nailer at the roof transition edge from roof one to roof two.

11. Adhere one layer of 1.5” polyisocyanurate insulation boards with manufacturer approved insulation adhesive per wind uplift requirements.

12. Enhance crickets leading to the drains to achieve a 2:1 length to width ratio. Crickets shall be installed out of board stock taper insulation.

13. Crickets shall be built on the high side of curbs that are greater than 24” in width. Crickets shall be built at a 1:1 length to width ratio.

14. Adhere 5/8” fibered gypsum cover board cover with manufacturer approved insulation adhesive per wind uplift requirements.

15. Install two ply self-adhered SBS base sheet in a “shingle” fashion. Install a one ply SBS self-adhered granulated cap.

16. Base flashings to be fastened with termination bar at all vertical surfaces and be installed with a minimum height of 8”.

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17. Seal all penetrations, protrusions, corners and drains with polyester fabric and acrylic coatings.

Once cured, bleed blocker to be applied per manufacturers application instructions.

18. Reinstall previously removed metal parapet wall counter flashing.

19. Coating newly installed three-ply roof system with acrylic coatings to achieve a minimum 39 mils DFT.

20. Coatings to be applied to the highest line of site to achieve a minimum 39 mils DFT. Coatings will be applied up the parapet walls and terminated just shy of exterior edge.

21. Install safety walk grip safety pads at all roof access locations and the service sides of HVAC units.

22. Replace all conduit and condensate wood blocking with pre-manufactured pipe supports.

Roof Section 2

1. Tear off the existing R-Mer-Lite roof system and insulation down to the metal substrate.

2. Remove west side gutter and downspout and dispose.

3. Install a 2”x6” wood nailer around the perimeter of the roof section.

4. Insall new 5”x5” K-Style 24-GA Kynar gutter and downspouts to replace previously removed.

5. Mechanically fasten one layer of 1.5” polyisocyanurate insulation boards per wind uplift requirements.

6. Adhere 5/8” fibered gypsum cover board cover with manufacturer approved insulation adhesive per wind uplift requirements.

7. Install a 24-Gauge 90-degree drip edge. Drip edge shall counter flash existing gutter by a minimum 2”.

8. Install two ply self-adhered SBS base sheet in a “shingle” fashion. Install a one ply SBS self-adhered granulated cap.

9. Coating newly installed three-ply roof system with acrylic coatings to achieve a minimum 36 mils DFT.

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Roof Sections 3-5, 8 & 9

1. Remove all existing wall expansion joint sealants and replace with new backer ant Tan wall compound sealant that is installed at a 2:1 depth to width ratio.

2. Power wash existing granulated roof system with a bio degradable cleaning solution.

3. Remove all dirt and debris from inside the gutters and dispose of properly.

4. Seal all penetrations, protrusions, corners and drains with polyester fabric and acrylic coatings.

Once cured, bleed blocker to be applied per manufacturers application instructions.

5. Seal all wall penetrations with a one-part urethane Tan sealant.

6. Apply an acrylic coating at an application rate to achieve a minimum 39 mils DFT. Coatings to be applied just under existing wall flashings.

Photo # 1 Description: Building IdentificationWRECORP

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Photo # 2 Description: Existing roof consists of R-Mer-Lite installed over 1/2" EPS and Fiberboard Insulation over a concrete substrate.

Photo # 3 Description: 1/2" EPS insulation over concrete.WRECORP

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Photo # 4

Description: View of roof core. Crickets consist of R-Mer-Lite over fiberboard over LWIC.

Photo # 5 Description: Existing slope is 1/8” per foot.

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Photo # 6 Description: Coatings will be applied to the highest line of site.

Photo # 7 Description: Crickets shall be installed on all curbs that are greater than 24” in width and shall be constructed out of board stock at a 2:1 length to width ratio. WRECORP

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Photo # 8

Description: Crickets to be built out of board stock.

Photo # 9 Description: HVAC Stands shall be se on protect pads to prevent damage to the newly instated roof system.

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Photo # 10

Description: Uni-Strut supports for the mechanical penetrations shall be properly supported and set using pre-manufactured blocking.

Photo # 11 Description: Drains shall be sumped a minimum one inch below the finished roof surface. Crickets shall be running directly into the sump drains. Drains shall be sealed with liquid flashings.

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Photo # 12 Description: Drain components including cinch rings will have to be installed, along with 2 lb. lead when being sealed with liquid flashings.

Photo # 13 Description: Wall penetrations at the masonry walls shall be sealed with a one-part urethane sealant prior to acrylic coatings. WRECORP

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Photo # 14

Description: Low height roof vents shall be replaced with new box 12”x12” box vents that are set a minimum 8” above the finished roof surface.

Photo # 15 Description: Wall penetrations to remain with no removal.

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Photo # 16 Description: All penetrations to be sealed with liquid flashings.

Photo # 17 Description: Seal holes in masonry walls with backer and a one-part urethane sealant. WRECORP

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Photo # 18 Description: View of roof transition between roof 1 and roof 10. Wood nailer to be installed at the edge of roof 1.

Photo # 19 Description: View of roof section 10WRECORP

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Photo # 20 Description: Existing wall flashing around the mechanical room shall be removed and new flashings installed after the roof installation.

Photo # 21 Description: View of roof section 2. WRECORP

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Photo # 22 Description: Gutter on roof 2 to be replaced.

Photo # 23 Description: Size of existing gutter on roof section 2. WRECORP

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Photo # 24 Description: Roofs 3-5, 8 & 9 shall be cleaned, and repaired prior to the coating restoration.

Photo # 25 Description: Roofs 3-5, 8 & 9 - All wall expansion joints shall be removed and new backer and wall compound sealant applied. WRECORP

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Photo # 26 Description: Roofs 3-5, 8 & 9 -Existing wall penetration sealant shall be removed and new TAN urethane sealant applied.

Photo # 27 Description: Roofs 3-5, 8 & 9 -All roof penetrations to be sealed with a three-course application using polyester fabric and liquid flashings. Bleed blocker / primer to be applied to the three courses prior to coatings.

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SELF-ADHERING MODIFIED BITUMINOUS MEMBRANE ROOFING 075219 - 1

SECTION 075219 - SELF-ADHERING MODIFIED BITUMINOUS MEMBRANE ROOFING

PART 1 - GENERAL

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. This Section includes the following:

1. Bid will consist of the following system application:

a. Air and Vapor Barrier

b. Polyisocyanurate Insulation

c. Cover board.

d. Two-layer self-adhered base sheets.

e. One-layer self-adhered granulated membrane.

1.3 DEFINITIONS

A. Roofing Terminology: Definitions in ASTM D 1079 and glossary in NRCA's "The NRCA Roofing and Waterproofing Manual" apply to work of this Section.

1.4 PERFORMANCE REQUIREMENTS

A. Install substrate boards, insulation with tapered crickets, cover boards and self-adhering modified bituminous membrane roofing and flashing system with compatible components that will not permit passage of liquid and will withstand wind loads, flotation loads, thermally induced movement, and exposure to weather without failure.

B. Material Compatibility: Provide polyurethane foam, elastomeric coatings, and miscellaneous roofing materials that are compatible with one another and able to bond to substrate under conditions of service and application required, as demonstrated by coated foamed roofing manufacturer based on testing and field experience.

C. The roofing assembly, from the steel decking up through the insulation boards and their securement, are to be FM Approved Assemblies for New Construction, Built-Up Roof assemblies. The spray-on foam and coating are to be FM Approved for “Recover” listed assemblies.

D. FM Global (FMG) Listing: Provide roofing system and component materials that Class 1. Identify materials with FMG markings.

1. Fire/Windstorm Classification: Class 1A- 90 for the field of the roof. The perimeters and corners are to have increased wind uplift resistance as required by FM Global Data Sheet 1-28

2. Hail-Resistance Classification: MH.

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E. Roofing System Design: Tested by a qualified testing agency to resist the following uplift pressures set by local codes:

1. Field Zone 1 62.40 pounds per square foot

2. Perimeter Zone 2 82.40 pounds per square foot

3. Corners Zone 3 108.20 pounds per square foot

F. Perimeter System Design: Tested by a qualified testing agency to resist the following uplift pressures set by local codes:

1. Perimeter Zone 4 39.40 pounds per square foot

2. Corner Zone 5 48.60 pounds per square foot

G. Gutter System Design: Tested by a qualified testing agency to resist the following uplift pressures set by local codes:

1. Perimeter Zone 4 39.40 pounds per square foot

2. Corner Zone 5 48.60 pounds per square foot

3. Perimeter Zone 2 70.80 pounds per square foot

4. Corner Zone 5 98.40 pounds per square foot

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H. FM Global (FMG) Listing: Provide roofing system and component materials that Class 1. Identify materials with FMG markings.

I. Local Codes: Designers shall have verified that the roofing system with the use of Densdeck or Iso Board, comply with local Codes and FM testing criteria.

1.5 SUBMITTALS

A. Product Data: For each type of roofing product used within the system.

B. Shop Drawings: For roofing system. Include plans, elevations, sections, details, and attachments to other work, including:

1. Construction details.

2. Base flashings and membrane terminations.

3. Insulation fastening patterns for corner, perimeter, and field-of-roof locations.

C. Fastening pattern layout for insulation / taper system that meet local wind up-lift ratings. (adhesive and fastener patterns)

D. Installer Certificates: Signed by manufacturers certifying that installers comply with manufacturer’s requirements.

E. Qualification Data: For Installer and manufacturer.

F. Manufacturer Letter: Signed by roofing manufacturer certifying that roofing system complies with requirements specified.

G. Inspection Report for Information: Copy of roofing system manufacturer's inspection report of completed roofing membrane.

H. MSDS: For each product being used in the roofing system. (Owner Only)

I. Warranty: Sample warranty in compliance with specification. (Manufacturer & Contractor)

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1.6 QUALITY ASSURANCE

A. Installer Qualifications: An employer of workers trained and approved by manufacturer, with a minimum of 10-years experience as a licensed contractor in the State of Arizona.

1. Manufacturer must provide a minimum of 4-hours certification class for each of the contractor’s employees that will be working on the project, prior to commencement of the project.

2. No personnel will be allowed to work on the project without the certification identification from the manufacturer.

3. Roofing contractor’s qualified employees must carry a photo ID card with the certification from the manufacturer on the backside of the photo ID.

B. Manufacturer Qualifications: Manufacturer must provide a minimum 4-hour accreditation program that is based on the manufacturer / industry published guidelines for adhered single ply roofing system.

Manufacturer will provide certificates of completion along with photo ID cards with the name of the person passing the course along with the contractor’s name, and date of completion.

C. Source Limitations: Obtain roofing system materials through one source from a single manufacturer.

D. All construction details shall be in accordance with the NRCA, Manufacturer, and SMACNA construction details as they apply to single ply roof systems, and be approved by the manufacturer prior to application.

E. Pre-installation Conference: Conduct conference at Project site to comply with requirements in Division 01 Section "Project Management and Coordination." Review methods and procedures related to roofing system including, but not limited to, the following:

1. Review structural load limitations of roof deck during and after roofing.

2. Review flashing, special roofing details, roof drainage, roof penetrations, equipment curbs, and condition of other construction that will affect roofing.

3. Review regulations and requirements of authorities having jurisdiction for insurance, certifications, and inspection and testing, if applicable.

4. Review temporary protection requirements for roofing system during and after installation.

5. Review roof observation and repair procedures after roofing installation.

1.7 DELIVERY, STORAGE, AND HANDLING

A. Deliver materials to Project site in original containers with seals unbroken, labeled with manufacturer's name, product brand name and type, date of manufacture, and directions for storing and mixing with other components.

1. Handle and store roofing materials and place equipment in a manner to avoid significant or permanent damage to deck or structural supporting members.

B. Protect roofing materials from damage and from deterioration by sunlight, moisture, soiling, and other sources. Store in a dry cool location.

C. Handle and store roofing materials, and place equipment in a manner to avoid permanent deflection of deck.

1.8 PROJECT CONDITIONS

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A. Environmental Limitations: Apply roofing within the range of ambient and substrate temperatures recommended by roofing system manufacturer. Do not apply roofing to a damp or wet substrate.

1. Do not apply roofing in snow, rain, fog, mist or when conditions are within 5F of dew point.

1.9 WARRANTY

A. Special Warranty: Manufacturer agrees to repair or replace components of roofing system that fail in materials or workmanship within specified warranty period. Special warranty includes roofing, base flashings, roof insulation, fasteners, cover boards, roofing accessories, and other components of roofing system.

1. Perform as manufactured and installed.

1. Perform as manufactured and installed.

2. Remain watertight.

3. Remain free of manufacturer or installation defects.

Coating System Warranty: Coating manufacturer agrees to repair or replace coating system that does not comply with the following requirements.

1. Perform as manufactured and installed.

2. Remain free of manufacturer or installation defects.

3. Coating shall not blister, scale, peel or crack.

B. Warranty Period: 30 years from date of Substantial Completion.

C. Contractor’s warranty will provide for all content as required by the Arizona Registrar of Contractors.

1. Provide 5-year warranty.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

1. Manufacturers: Subject to compliance with requirements, foam and coatings must be provided by the source of the warranty:

a. Polyglass (RoofNav Assembly 547589-547139-0)

b. Or equal with FMG RoofNav Number

2.2 ROOFING MEMBRANE

A. Base Ply Membrane: Self-Adhering SBS Modified Bituminous Roofing Membrane with fiberglass reinforcement. (2 layers)

1. Acceptable Products;

a. Polyglass – Elastoflex SA V

b. Or equal

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B. Surface Membrane: Self-adhering granulated, fiberglass or polyester reinforced, SBS modified bitumen membrane.

1. Polyglass – Polyfresko G SBS SA FR

2. Or equal

C. Base Flashings – Parapet Walls: Self-adhering SBS modified bitumen membrane.

1. Acceptable Products

2. Polyglass – Polyfresko G SBS SA FR over Elastoflex SA V

a. Or equal

D. Base Flashings – Non Parapet Walls:

1. Acceptable Products

2. Polyglass – Polyfresko G SBS SA FR over Elastoflex SA V

a. Or equal

2.3 VAPOR BARRIER

A. Air & Vapor Barrier

1. Polyglass VertiWrap NPS (Roofs 1 & 10 Only)

2. Or equal

2.4 INSULATION BOARDS: Polyisocyanurate board stock insulation.

A. Manufacturers

1. Polyglass Polytherm G

2. Or equal, as listed in the FM Assembly details.

B. Thickness

1. One layer of 1.5” insulation to achieve an average R-8.6 value.

2.5 COVER BOARD

A. Gypsum Fiber Board

1. Securock Gypsum Fibered Roof Board

2. Or equal

B. Thickness: 5/8 inch maximum to achieve an average R-.56 value.

2.6 COATINGS

A. Energy Star certified white acrylic roof coating.

B. Approved manufacturers:

1. Polyglass – PG 700

2. Or equal

C. Coating minimum requirements: ASTM D 6083

a. Emissivity – 90%

b. Reflectivity – 80%

c. Solids by Volume – 55% +/- 5%

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d. Minimum Thickness – 26 mils DFT

2.7 AUXILIARY MATERIALS

A. General: Furnish auxiliary materials recommended by roofing system manufacturer for intended use and compatible with roofing.

1. Furnish liquid-type auxiliary materials that meet VOC limits of authorities having jurisdiction.

B. Low VOC solvent based adhesive primer for concrete substrates for application of self-adhered air and vapor barrier.

1. Polyglass Mapeprime S710

2. Or equal

C. Bleed Blocker: Polyglass PB 745 Bleed Blocker at an application rate of 1/4 gallon per square feet.

D. Mastic and Sealant: SBS mastic and sealant recommended by manufacturer.

E. Adhesives: Two-part low-rise foam insulation adhesive designed to adhere insulation using the manufacturers recommended application rates.

F. Metal Termination Bars: Manufacturer's standard predrilled stainless steel or aluminum termination bars, approximately 1 by 1/8 inch thick, with anchors.

G. Flashings: 24 gauge minimum. Perimeter, curb and wall flashings (type SM).

H. Liquid Flashings: One part urethane bituminous flashing system with polyester fabric.

I. Fabric Mat: Stitchbond polyester fabric mat; of type and weight recommended by roofing manufacturer for application.

J. Pre-manufactured Pipe Stands; Designed specifically for pipes and conduits.

1. Dura-Blok

2. Miro

3. True Power True Support

K. Expansion Joint Sealant

1. Approved Manufacturers

a. Chem Link DuraLink 50 / HBR-Rod

b. Or equal

PART 3 - EXECUTION

3.1 TEAR OFF /EXAMINATION

A. Tear off the existing roof system down to the substrate. Examine substrates, areas, and conditions under which coated foamed roofing will be applied, with Installer present, for compliance with requirements.

Begin installation only after unsatisfactory conditions have been corrected and substrates are dry.

1. All roof decks must be properly sloped to provide for positive drainage to the drains or scuppers.

2. Drains must be sumped a minimum of 1.5 inches below the finished roof surface.

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3. All curbs, pipes and penetrations shall be built to allow for a minimum base flashing height of 8-inches above the finished foam roof surface including the cricket.

4. All curbs, pipes and penetrations shall have a minimum 18 inches separation between each other, walls, and valleys.

5. All crickets shall have a minimum 2:1 length to width ratio and shall have a slope equal to or greater that the slope of the roof.

6. Crickets on the high side of curbs greater than 24” in width shall be a minimum1:1 length to width ratio.

B. Proceed with installation only after unsatisfactory conditions have been corrected and substrates are dry.

3.2 PREPARATION

A. Clean and prepare substrate according to roofing manufacturers written instructions. Provide clean, dust-free, dew-free, and dry substrate for coated foamed roofing application.

B. Remove grease, oil, form-release agents, curing compounds, and other contaminants from substrate.

C. Cover and mask adjoining surfaces not receiving primer and coatings to prevent overspray or spillage affecting other construction. Close off roof drains, removing roof-drain plugs when no work is being done or when rain is forecast.

1. Remove masking after polyurethane foam application and remask adjoining substrates before coating.

D. Fill, cover, or tape joints and cracks in substrate that exceed a width of 1/4 inch. Remove dust and dirt from joints and cracks before applying polyurethane foam.

3.3 ROOFING INSTALLATION, GENERAL

A. Install roofing system according to roofing system manufacturer's written instructions.

B. Complete terminations and base flashings and provide temporary seals to prevent water from entering completed sections of roofing system at the end of the workday or when rain is forecast. Remove and discard temporary seals before beginning work on adjoining roofing.

C. Install roofing and auxiliary materials to tie in to existing roofing to maintain weather tightness of transition and to not void warranty for existing roofing system.

3.4 AIR AND VAPOR BARRIER

A. Apply primer to concrete substrate per the roofing system manufacturers written installation instructions.

B. Install air and vapor barrier according to roofing system manufacturer's written installation instructions.

C. Complete terminations and base flashings and provide temporary seals to prevent water from entering completed sections of roofing system at the end of the workday or when rain is forecast. Remove and discard temporary seals before beginning work on adjoining roofing.

D. Install roofing and auxiliary materials to tie in to existing roofing to maintain weather tightness of transition and to not void warranty for existing roofing system.

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3.5 INSULATION OR TAPER SYSTEM:

A. Fire/Windstorm Classification: Class 1A- 90 for the field of the roof. The perimeters and corners are to have increased wind uplift resistance as required by FM Global Data Sheet 1-28

B. Insulation is to be adhered to the substrate with a two-part insulation adhesive on roof sections one and ten. Insulation is to be fastened to the substrate with a insulation plates and fasteners on roof section two

C. Taper insulation boards to be adhered over the stock boards with a wo-part insulation foam adhesive.

D. Tapered crickets - Install one or more layers of insulation to achieve required thickness. Cut and fit to within 1/2 inch of projections and penetrations.

E. Crickets shall be created with insulation / taper board.

F. Ensure that there are no gaps greater than ¼ inch. Fasten the insulation with mechanical fasteners over lightweight or with adhesives over the concrete decks.

G. Where overall insulation thickness is 2 inches or more, install required thickness in 2 or more layers with joints of each succeeding layer staggered over joints of previous layer a minimum of 6 inches in each direction.

3.6 COVERBOARD INSTALLATION

A. Cover board shall be off set and staggered over joints of previously laid insulation boards by a minimum 12 inches in each direction. Fastened with 2-part insulation adhesives.

3.7 SELF ADHERED MEMBRANE INSTALLATION

A. Install roofing membrane according to roofing membrane manufacturer's written instructions.

B. Install self-adhering modified bituminous membrane roofing.

1. When ambient and substrate temperatures are 40 degrees F and rising or greater as required by the manufacturer.

C. Base Application: Apply the base plies to the cover board. The base sheets are to be applied in shingle fashion and set as so the laps do not line up with the laps of the granulated membrane. Maintain uniform 6-inch- wide end laps. Overlap and roll seams and stagger end laps.

D. Granulated Membrane: Apply membrane from low point to high point of roof deck to ensure that side laps shed water.

E. Repair tears, voids, and lapped seams in roofing not complying with requirements. Slit and flatten fishmouths and blisters. Patch with roofing membrane extending 6 inches beyond repaired areas in all directions.

F. Correct deficiencies in or remove roofing membrane that does not comply with requirements, repair substrates, reapply roofing membrane, and repair flashing sheets.

G. There shall be no exposed asphalt-based mastics on membrane that is to be coated.

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3.8 FLASHING INSTALLATION

A. Install base flashing membrane and extend up walls or parapets a minimum of 8 inches above insulation.

B. Install termination bars and mechanically fasten to top of all base flashings at terminations, curbs, parapets and perimeter of roofing. Seal top of flashing with SBS modified mastic or approved sealant.

Counter flash with 2-piece metal flashings or liquid flashing as described by designer.

C. All roof pipe, equipment and curb penetrations shall be a minimum 8 inches above the finished roof and shall be flashed with lead and or 2-part urethane flashing materials. All horizontal pipes and conduits are to be set and secured a minimum 12” from base flashings and walls.

D. There shall be no exposed asphalt-based mastics on membrane that is to be coated.

3.9 COATING APPLICATION

A. Coatings are to be applied at a rate to achieve a final dry film thickness (DFT).

1. Primer coat may be required by manufacturer and can be included in the 26 mils DFT minimum requirement.

2. First coat is to be applied at a rate to achieve a minimum 13 mils DFT. The first coat is to be sprayed and back rolled into the granule surface.

3. The second coat is to be sprayed applied perpendicular to first application, at a rate to achieve a minimum 13 mils DFT.

4. Total coating thickness shall be minimum 39 mils DFT as measured with an optical comparator.

3.10 FIELD QUALITY CONTROL

A. Authorized representative of the owner – will perform quality assurance monitoring and testing of samples from the roof on the project as authorized by the owner.

B. Authorized technical representative of the manufacturer supplying roofing system shall perform in-progress inspections.

1. Minimum one in progress inspection per roof section.

C. Final Roof Inspection: Arrange for roofing system manufacturer's technical personnel to inspect roofing installation on completion of roofing membrane and flashing.

1. Notify consultant and Owner 48 hours in advance of date and time of inspection.

2. Manufacturer’s personnel shall provide inspection report on any deficiencies or variations.

D. Contractor shall repair all test areas and correct deficiencies in or remove roofing that does not comply with requirements, repair substrates, reapply roofing, and repair flashing. All test areas and deficiency corrections shall be made by the contractor at no additional cost to owner.

3.11 PROTECTING AND CLEANING

A. Protect roofing according to manufacturers written recommendations to prevent damage and wear during application and remainder of construction period.

WRECORP BID PACKET: MCCCD / MCC - Bldg. 50 (Roof Replacement) Page 103 of 131

SELF-ADHERING MODIFIED BITUMINOUS MEMBRANE ROOFING 075219 - 11

B. Protect installed insulation from damage due to UV-light exposure, physical abuse, and other causes.

Provide temporary coverings where insulation will be subject to abuse and cannot be concealed and protected by permanent construction immediately after installation.

C. Clean spillage and soiling from adjacent construction using cleaning agents and procedures recommended by manufacturer of affected construction.

END OF SECTION 075219

WRECORP BID PACKET: MCCCD / MCC - Bldg. 50 (Roof Replacement) Page 104 of 131

COATED ROOFING 075703 - 1

SECTION 075703 – COATED RESTORATION SYSTEM

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Elastomeric roof coatings.

1.2 PERFORMANCE REQUIREMENTS

A. Watertightness: Provide coated roofing that is watertight and will not permit the passage of water.

B. Material Compatibility: Provide elastomeric coatings, and miscellaneous roofing materials that are compatible with one another and able to bond to substrate under conditions of service and application required, as demonstrated by coated roofing manufacturer based on testing and field experience.

1.3 SUBMITTALS

A. Product Data: For each type of product indicated. Include manufacturer's written instructions for evaluating, preparing, and treating substrate; technical data; and tested physical and performance properties.

B. Samples for Initial Selection: For roof coating colors.

C. Maintenance Data: For coated roofing to include in maintenance manuals.

D. Warranty: Sample of special warranty complying with section 1.7.

1.4 QUALITY ASSURANCE

A. Installer Qualifications: A licensed contractor that holds a minimum C-42 and or CR-42 license in the

State of Arizona for a minimum 10 years. A qualified contractor who is authorized by roof coating manufacturer for installation of manufacturer's product over existing roof systems and has a minimum

500,000 sq. ft. of manufacturer’s product applied in Arizona.

1. Engage an installer who participates in and who has fulfilled requirements of a minimum four-hour manufacturer accreditation for all personnel assigned to work on Project.

B. Manufacturer Assurance: A manufacturer’s representative shall visit the project a minimum of once a week and shall submit a report to the consultant each week detailing contractor’s compliance with specification and manufacturer’s requirements.

C. Source Limitations: Obtain coating products from single coating manufacturer.

D. Pre-installation Conference: Conduct conference at Project site.

COATED ROOFING 075703 - 2

1. Review methods and procedures related to coated roofing including, but not limited to, the following:

a. Construction schedule. Verify availability of materials, Installer's personnel, equipment, and facilities needed to make progress and avoid delays.

b. Certifying procedures.

c. Surface preparations.

d. Minimum curing period.

e. Forecasted weather conditions.

f. Application procedures.

g. Testing and inspection procedures.

h. Protection and repairs.

1.5 DELIVERY, STORAGE, AND HANDLING

A. Deliver materials to Project site in original containers with seals unbroken, labeled with manufacturer's name, product brand name and type, date of manufacture, shelf life, and directions for storing and mixing with other components.

B. Store materials in their original undamaged containers in a clean, dry, protected location and within the temperature range required by manufacturer. Protect stored materials from direct sunlight.

C. Remove and replace material that cannot be applied within its stated shelf life.

1.6 PROJECT CONDITIONS

A. Weather Limitations: Proceed with installation only when existing and forecasted weather conditions permit roofing work to be performed according to coated roofing manufacturer's written instructions and warranty requirements.

1. Apply materials within the range of ambient and substrate temperatures recommended by roofing material manufacturers, but not below 50 deg F.

2. Apply materials within range of relative humidity recommended by manufacturer of each component, but not when relative humidity exceeds 85 percent, nor when temperatures are less than 5 deg F above dew point.

3. Do not apply materials to damp or wet surfaces.

4. Do not apply coatings in snow, rain, fog, or mist, or when such weather conditions are imminent during the application and curing period.

5. Do not apply coatings when wind conditions prevent uniform coating application or containment of overspray.

1.7 WARRANTY

A. Special Warranty: Coated roofing manufacturer's special form in which manufacturer agrees to repair or replace coated roofing that does not comply with requirements.

1. Requirements:

a. Coating system shall be installed and remain free of air voids in the system.

b. Shall not scale, peel, crack, fracture or blister.

c. Coating shall maintain a minimum 20 mils DFT above the polyester fabric for the life of the warranty.

COATED ROOFING 075703 - 3

d. System shall not leak.

2. Warranty Period: 20 years from date of Substantial Completion.

PART 2 - PRODUCTS

2.1 ACRYLIC COATINGS

A. Acrylic Coatings: Liquid acrylic elastomeric emulsion coating system, complying with ASTM D 6083 and specifically formulated for coating roofing.

1. Manufacturers: Subject to compliance with requirements, provide products by one of the following:

a. Polyglass Coatings

b. General Coatings

c. Protech

2. Topcoat Color: White.

3. Solids by Volume: 53% or greater

4. Elongation at Break: 260% or greater

5. Tensile Strength: 260 psi or greater

2.2 AUXILIARY MATERIALS

A. General: Furnish auxiliary materials recommended by roofing system manufacturer for intended use and compatible with roofing.

1. Furnish liquid-type auxiliary materials that meet VOC limits of authorities having jurisdiction.

B. Cleaning Concentrate: Cleaner that is formulated to clean existing smooth and granulated surfaced modified, and built-up roof systems that is 100% biodegradable.

C. Liquid Flashings: One part urethane bituminous flashing system with polyester fabric.

D. Fabric mats, sometimes called "protection mats" or "filter fabrics," are placed under aggregate ballast to limit ballast movement and control insulation flotation in protected membrane roofing systems.

E. Fabric Mat: Stitch bond polyester fabric mat; of type and weight recommended by roofing manufacturer for application.

F. Bleed Blocker: Polyglass PB 745 Bleed Blocker at an application rate of 1/4 gallon per square feet.

G. Expansion Joint Sealant

1. Approved Manufacturers

a. Chem Link DuraLink 50 / HBR-Rod

b. Or equal

PART 3 - EXECUTION

COATED ROOFING 075703 - 4

3.1 EXAMINATION

A. Examine existing roof areas and conditions under which coatings will be applied, with Installer and

Manufacturer present, for compliance with requirements. Begin installation only after unsatisfactory conditions have been corrected and substrates are dry.

3.2 SURFACE PREPARATION

A. Clean and prepare substrate by power washing with a biodegradable cleaning solution approved by the coating manufacturer. Provide clean, dust-free, dew-free, and dry substrate for coating application.

B. Remove grease, oil, asphalt-based sealants, and other contaminants from substrate.

C. Cover and mask adjoining surfaces not receiving coating system to prevent overspray or spillage affecting other construction. Close off roof drains, removing roof-drain plugs when no work is being done or when rain is forecast.

1. Remove masking after coatings have been applied.

D. Repair cracks in substrate and walls that exceed a width of 1/8 inch. Remove dust and dirt from joints and cracks before applying coatings.

E. Test substrates for moisture prior to application of coatings.

3.3 COATING APPLICATION

A. Apply coating system to existing roof system, in three or more coats and according to roof coating manufacturer's written instructions, by spray applied method.

B. Apply minimum three coats to obtain a uniform, seamless membrane free of blisters and pinholes. Apply each coat at right angles to preceding coat, using contrasting colors for successive coats.

1. Spray-apply and back roll base coat at the rate to achieve 13 mils DFT.

2. Allow adequate time for curing and then spray-apply the second coat in a white color at the rate to achieve 13 mils DFT.

3. Allow adequate time for curing and then spray-apply the second coat in a white color at the rate to achieve 13 mils DFT.

4. Final thickness of coatings shall be a minimum of 39 mils DFT.

C. Apply coating system at wall terminations and vertical surfaces to achieve 25 mils DFT.

D. Apply coatings to the roof top equipment at the rate to achieve 20 mils DFT.

E. Coat the walls with white acrylic coatings to achieve 25 mils DFT.

3.8 FIELD QUALITY CONTROL

F. An independent third-party inspector (consultant) shall perform quality assurance monitoring and testing of the roof system a minimum of twice a week, from the roof on the project as contracted by the owner.

1. The inspector shall have a minimum RRO (Registered Roof Observer) certification from IIBEC

(International Institute of Building Enclosure Consultants)

COATED ROOFING 075703 - 5

2. Consultants shall photograph work being performed and reports shall be issued to the manufacturer, owner and contractor within 24 hours of the inspection.

G. Authorized technical representative of the manufacturer supplying roofing system shall perform in-progress inspections.

1. Minimum one in progress inspection per roof section and/or one inspection per week.

H. The manufacturer and consultant will be required to randomly sample the coating application during application and after final coat has been installed and cured. The samples will be slit samples and will be checked for DFT requirements.

I. Contractor will repair all sample areas immediately after they are taken and there will be no additional charge from the contractor.

J. Contractor will be required to correct any deficiencies.

K. Final Roof Inspection: Arrange for roofing system manufacturer's technical personnel to inspect roofing installation on completion of roofing membrane and flashing.

1. Notify consultant and Owner 48 hours in advance of date and time of inspection.

2. Manufacturer’s personnel shall provide inspection report on any deficiencies or variations.

L. Contractor shall repair all test areas and correct deficiencies in or remove roofing that does not comply with requirements, repair substrates, reapply roofing, and repair flashing. All test areas and deficiency corrections shall be made by the contractor at no additional cost to owner.

3.4 CURING, PROTECTING, AND CLEANING

A. Cure coatings according to coating manufacturer's written instructions, taking care to prevent contamination and damage during application stages and curing. Do not permit traffic on uncured coatings.

B. Clean overspray and spillage from adjacent construction using cleaning agents and procedures recommended by manufacturer of affected construction.

END OF SECTION 075703

The NRCA Roofing and Waterproofing Manual—Fifth Edition

EQUIPMENT SUPPORT STAND

MB-10

NOT DRAWN TO SCALE2001

THIS DETAIL MAY BE PREFERABLE TO DETAIL MB-9 WHEN THE CONCENTRATED LOADS CAN BE LOCATED DIRECTLY OVER1.

COLUMNS OR HEAVY GIRDERS IN THE STRUCTURE OF THE BUILDING. THIS DETAIL CAN BE ADAPTED FOR OTHER USES, SUCH AS SIGN SUPPORTS.

ROUND PIPE COLUMN

OF SUPPORT LEGS

MB-11 FOR FLASHING

SEE DETAIL

STRUCTURAL FRAME

WIDTH - S

EE TA

BLE

SEE TABLE

HEIGHT-

REFER TO THE INTRODUCTION FOR ADDITIONAL INFORMATION.2.

NOTES :

WIDTH OF EQUIPMENT

UP TO 24'' [UP TO 600 mm]

48'' AND WIDER [1.2 m AND WIDER]

24'' TO 48'' [600 mm TO 1.2 m]

24'' [600 mm]

HEIGHT OF LEGS

48'' [1.2 m]

36'' [900 mm]

WRECORP BID PACKET: MCCCD / MCC - Bldg. 50 (Roof Replacement) Page 110 of 131

MB-12

NOT DRAWN TO SCALE2001

LOCATION FOR

CONDITIONS

HEAVY WEIGHT

LOADING

ROOF DECK

MULTIPLE-PLY MODIFIED

BITUMEN ROOF MEMBRANE

COVERBOARD INSULATION

THERMAL INSULATION

CURB BEARING

ALTERNATE

FASTENERS APPROX. 8''

[200 mm] O.C.

OPTIONAL: EXTENDED FIELD

PLIES ABOVE HEAD OF CANT

MULTIPLE-PLY MEMBRANE

BASE FLASHING (8''

MINIMUM TWO FASTENERS

REMOVABLE SHEET

METAL COUNTERFLASHING

RAISED CURB SEALING MATERIAL

WOOD NAILER

[200 mm] MIN. HEIGHT)

1'' [25 mm] MINIMUM

BELOW TOP OF CURB

RAISED CURB

BE CONTINUOUS ON TOP

SEALING MATERIAL - MUST

[13 mm] MINIMUM BEYOND

BASE OF UNIT EXTENDS 1/2''

MECHANICAL UNIT, HOOD, ETC.

OF THE CURB

BASE FLASHING

COUNTERFLASHING

FASTENERS

TOP OF CURB

FLASHING RECEIVER

WOOD NAILER

INSULATION

FEATHERED AT FIELD OF

ROOF (FOR ROOF

WOOD NAILER

GASKETED FASTENERS

PER SIDE

APPROX. 4''

[100 mm]

AND GRANULE-SURFACED

SHEET)

SYSTEMS WITH FACTORY-

APPLIED GRANULE

SURFACING, THE MULTI-

PLY MEMBRANE BASE

FLASHING CAN BE INSTALLED

BETWEEN THE BASE PLY

RAISED CURB DETAIL FOR ROOFTOP AIR

HANDLING UNITS AND DUCTS

(PREFABRICATED METAL CURB)

OPTIONAL

1.

NOTES

THE CURBS, TOP WOOD NAILER, AND SEAL STRIP ARE TO

BE SUPPLIED BY THE CURB MANUFACTURER.

WHEN POSSIBLE, THE MECHANICAL UNITS SHOULD NOT

2.

3.

BE SET UNTIL THE ROOF MEMBRANE AND FLASHING

HAVE BEEN INSTALLED.

REFER TO THE INTRODUCTION FOR ADDITIONAL

INFORMATION.

4. REFER TO THE SHEET METAL SECTION OF THE METAL

ROOFING MANUAL FOR JOINERY AND SECUREMENT

OPTIONS FOR SHEET METAL.WRECORP

WRECORP BID PACKET: MCCCD / MCC - Bldg. 50 (Roof Replacement) Page 111 of 131

MB-20A

NOT DRAWN TO SCALE

ROOF DRAIN - ALTERNATE FLASHING

PLIES, METAL FLASHING,

EXTEND UNDER CLAMPING

AND STRIPPING PLY ALL

RING

DECK CLAMP

CLAMPING RING

MEMBRANE FIELD

DRAIN BOWL

ROOF DECK

30'' [750 mm] SQUARE MINIMUM, 2 1/2 LB. TO 4 LB. [12 TO 20 kg/m ]

FLASHING SET IN COMPATIBLE ROOF

CEMENT PRIME TOP SURFACE BEFORE

STRIPPING

TAPERED

MODIFIED BITUMEN MEMBRANE

DRAIN STRAINER

COMPATIBLE ROOF CEMENT

MODIFIED BITUMEN ROOF MEMBRANE BASE PLY

THERMAL INSULATION

COVERBOARD INSULATION

INSULATION

STRIPPING PLY

LEAD OR 16 OZ. [5 kg/m ] SOFT COPPER2

MODIFIED BITUMEN ROOF

MEMBRANE CAP SHEET

THE USE OF A METAL DECK SUMP PAN IS NOT RECOMMENDED. HOWEVER,

NOTES

1.

DRAIN RECEIVER/BEARING PLATES ARE APPLICABLE WITH SOME PROJECTS.

2.

3.

THE DESIGNER SHOULD CONSIDER INSULATING THE DRAIN COMPONENTS BELOW THE DECK TO PREVENT

POTENTIAL CONDENSATION.

MEMBRANE SEAMS SHOULD NOT INTERSECT DRAIN CLAMPING RING.

4. REFER TO THE INTRODUCTION FOR ADDITIONAL INFORMATION.WRECORP

WRECORP BID PACKET: MCCCD / MCC - Bldg. 50 (Roof Replacement) Page 112 of 131

3.

NOTES:

2.

1. THIS DETAIL SHOULD BE USED ONLY WHEN THE ROOF DECK IS SUPPORTED BY THE WALL.

REFER TO THE ARCHITECTURAL SHEET METAL SECTION OF THE NRCA ROOFING AND WATERPROOFING MANUAL FOR JOINERY AND

SECUREMENT OPTIONS FOR SHEET METAL.

REFER TO THE BUR/MB INTRODUCTION FOR ADDITIONAL INFORMATION.

CANT

ROOF DECK

COVER-BOARD INSULATION

THERMAL INSULATION

MOP- OR COLD-APPLIED BASE FLASHING AT THROUGH-WALL SCUPPER

NOT DRAWN TO SCALE2007 MB-24

SHEET METAL SCUPPER,

SOLDERED/WELDED --

SECURED TO WALL AND DECK

OR OPTIONAL WOOD

BLOCKING

OPTIONAL: L-SHAPED

GRAVEL GUARD SECURED TO

THE SCUPPER FLANGE,

NOTCHED TO PERMIT

DRAINAGE

4" MIN.

4" MIN.

4" MIN.

CONDUCTOR HEAD TO BE 1 INCH MINIMUM BELOW BOTTOM OF THROUGH-WALL SCUPPER.

4.

OPTIONAL: WOOD BLOCKING

TERMINATION OF MEMBRANE

FLASHING WILL VARY

PRIME SURFACE AS

REQUIRED

MEMBRANE FLASHING

SHEET ADHERED TO

BACKER, MOP- OR

COLD-APPLIED-. (FOR ROOF

SYSTEMS WITH FACTORY-

APPLIED GRANULE

SURFACING, THE MULTIPLE-

PLY MEMBRANE FLASHING

CAN BE INSTALLED BETWEEN

THE BASE PLY AND

GRANULE-SURFACED SHEET)

MULTIPLE-PLY MODIFIED

BITUMEN ROOF MEMBRANE

BACKER

WRECORP BID PACKET: MCCCD / MCC - Bldg. 50 (Roof Replacement) Page 113 of 131

CANT

ROOF DECK COVER-BOARD INSULATION

THERMAL INSULATION

TERMINATION OF

MEMBRANE FLASHING

WILL VARY

MOP- OR COLD-APPLIED BASE FLASHING AT OVERFLOW SCUPPER

NOT DRAWN TO SCALE2007 MB-25

SHEET-METAL

SCUPPER SOLDERED/

WELDED -- SECURED

TO WALL

BACKER

4" MIN.

4" MIN.

4" MIN.

REFER TO THE ARCHITECTURAL SHEET METAL SECTION OF THE NRCA ROOFING AND WATERPROOFING MANUAL FOR JOINERY AND

SECUREMENT OPTIONS FOR SHEET METAL.

THIS DETAIL SHOULD BE USED ONLY WHEN THE ROOF DECK IS SUPPORTED BY THE WALL.

REFER TO THE BUR/MB INTRODUCTION FOR ADDITIONAL INFORMATION.

1.

2.

3.

NOTES:

MULTIPLE-PLY MODIFIED

BITUMEN ROOF MEMBRANE

MEMBRANE FLASHING SHEET

ADHERED TO BACKER, MOP-

OR COLD-APPLIED (FOR ROOF

SYSTEMS WITH

FACTORY-APPLIED GRANULE

SURFACING, THE MULTIPLE-

PLY MEMBRANE FLASHING

CAN BE INSTALLED BETWEEN

THE BASE PLY AND

GRANULE-SURFACED SHEET)

PRIME SURFACE

AS REQUIRED

WRECORP BID PACKET: MCCCD / MCC - Bldg. 50 (Roof Replacement) Page 114 of 131

P-1 Penetrations - Liquid Flashings

Coatings Extended Beyond Liquid Flashings

Liquid Flashing System Wrapped Around Pipe with 3"

Min. Overlap

Liquid Flashing System Secondary Corner Flashing

Three-Coursing

Insulation

WRECORP BID PACKET: MCCCD / MCC - Bldg. 50 (Roof Replacement) Page 115 of 131

Roof 10 Base Plies

Roof 10 Granulated Cap Flashing

Roof 1 Vapor Barrier

Temination Bar Drip Edge

Roof 1 Base Plies

Roof 1 Granulated Cap

Cant

1.5" Insulation

Roof 10 Vapor Barrier Roof 10 Roof System

Roof section Wall Transition

Cover Board

WRECORP BID PACKET: MCCCD / MCC - Bldg. 50 (Roof Replacement) Page 116 of 131

Concrete Substrate

Vapor & Air Barrier

Adhered 1.5" Insulation

Adhered 5/8" Gypsum Board Two Ply SA Base

SA Granualted Cap

Specified Roof System

WRECORP BID PACKET: MCCCD / MCC - Bldg. 50 (Roof Replacement) Page 117 of 131

N

E

E

E

E E

E E

E

EE

V

V

V

V

V

V V

-O -O-O

-O

-O

-O -O -O

-O-O

New Gutter

Install Wood Nailer

Install Wood Nailer

Repair & Restoration (R/R)

Replacement

Replacement

Enhance All Crickets

Enhance All Crickets

Enhance All Crickets

Replace W/ Box Vent

Eliminate Mechanical

Walk Pad Under Antennas / SatellitesR/R

R/RR/R

R/R

Replace W/ Box Vent

Roof Replacement (Roofs 1, 2 & 10) - 74,514 SqFt

Roof Restoration (Roofs 3,4,5,8 & 9) - 7,200 SqFt

All Wall Expansion Joints To Be ReplacedWRECORP

WRECORP BID PACKET: MCCCD / MCC - Bldg. 50 (Roof Replacement) Page 118 of 131