BIBE_259631-317515_Final_CD_Specifications_Section_075216_Rev_1_08_18_2025_0004.pdf

Replace the Chisos Mountains Lodge and Lodge Component Rehabilitate the Chisos Basin Water System

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Revision 1 08/18/2025 SBS-MODIFIED BITUMINOUS MEMBRANE ROOFING

SECTION 07 52 16 – SBS-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. Section Includes:

1. Protected, SBS-modified bituminous membrane roofing at roof terraces.

2. Permanently exposed PMMA roofing membrane.

3. Roof insulation.

4. Omitted.

5. Leak detection system.

B. Related Sections:

1. Section 06 10 53 – Miscellaneous Rough Carpentry: Wood nailers, cants, curbs, and blocking.

2. Section 07 60 00 - Flashing and Sheet Metal: Counter flashing.

3. Section 07 61 00 – Sheet Metal Roofing.

4. Section 07 72 00 – Roof Accessories.

5. Section 07 06 00 – Composite Roof Paver Systems.

1.3 LEED REQUIREMENTS

A. Refer to Section 01 81 13 for LEED requirements related to this Section.

1.4 DEFINITIONS

A. Roofing Terminology: Refer to ASTM D1079 and glossary of NRCA's "The NRCA Roofing and Waterproofing Manual" for definition of terms related to roofing work in this Section.

1.5 ACTION SUBMITTALS

A. Product Data: For each type of product indicated.

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

1. Base flashings, cants, and membrane terminations.

2. Tapered insulation, including slopes.

3. Crickets, saddles, and tapered edge strips, including slopes.

4. Insulation fastening patterns.

C. Samples for Verification: For the following products:

1. 12-by-12-inch (300-by-300-mm) square of base-ply sheet, smooth-surfaced roofing membrane sheet, and flashing backer sheet.

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2. 12-by-12-inch (300-by-300-mm) square of smooth-surfaced roofing membrane cap sheet, and flashing sheet, of color specified.

3. 12-by-12-inch (300-by-300-mm) square of vapor retarder.

4. 12-by-12-inch (300-by-300-mm) square of roof insulation.

5. 3 lb (1.5 kg) of aggregate surfacing material.

6. Full-size walkway roof paver in each color and texture required.

7. Six insulation fasteners of each type, length, and finish.

D. LEED Submittals: See Section 01 81 13 requirements. Complete the LEED v4 Materials Reporting Form with all materials provided to the project. A complete submittal includes providing all material costs in the Reporting Form and all of the supporting documentation for the following credits:

1. SSc5, Heat Island Reduction:

a. Product Test Reports and Data for roof materials, indicating that roof materials comply with Solar Reflectance Index (SRI) requirement.

1) Provide drawings of roof highlighting locations of specific roof materials and roof systems.

2) Indicate total area of installed SRI compliant roofing materials.

3) Provide a list of installed roofing materials and their SRI values.

1.6 INFORMATIONAL SUBMITTALS

A. Installer Certificates: Signed by roofing system manufacturer certifying that Installer is approved, authorized, or licensed by manufacturer to install roofing system.

B. Manufacturer Certificates: Signed by roofing manufacturer certifying that roofing system complies with requirements specified in "Performance Requirements" Article.

1. Submit evidence of meeting performance requirements.

C. Cool Roof Certification: Certification of Compliance with Title 24 Part 6 Section 118 California Energy Code. Reflectance; product shall have a minimum initial reflectance of at least 0.70 when tested in accordance with CRRC-1, ASTM E903 and emissivity at least 0.75 when tested in accordance with CRRC-1, ASTM E408.

1. Provide R-value in accordance with Table 143-A of 2005 Energy Commission

Efficiency Standards for Nonresidential Buildings (adopted pursuant to Assembly Bill 970, Statutes of 2000).

D. Qualification Data: For Installer and manufacturer.

E. Product Test Reports: Based on evaluation of comprehensive tests performed by manufacturer and witnessed by a qualified testing agency, for components of roofing system.

F. Research/Evaluation Reports: Meeting current model code organization for components of roofing system.

G. Inspection Report: Copy of roofing system manufacturer's inspection report of completed roofing installation.

H. Warranty: Sample of special warranty.

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1.7 CLOSEOUT SUBMITTALS

A. Maintenance Data: For roofing system to include in maintenance manuals.

B. Warranty: Special warranty specified in this Section.

1.8 QUALITY ASSURANCE

A. Installer Qualifications: A qualified firm that is approved, authorized, or licensed by roofing system manufacturer to install manufacturer's product and that is eligible to receive manufacturer's warranty.

B. Manufacturer Qualifications: A qualified manufacturer that has UL listing and FMG approval for roofing system identical to that used for this Project.

C. Source Limitations: Obtain components for roofing system from roofing system manufacturer.

D. Fire-Test-Response Characteristics: Provide roofing materials with the fire-test-response characteristics indicated as determined by testing identical products per test method below by UL, FMG, or another testing and inspecting agency acceptable to authorities having jurisdiction. Materials shall be identified with appropriate markings of applicable testing and inspecting agency.

1. Exterior Fire-Test Exposure: Class A; ASTM E108, for application and roof slopes indicated.

1.9 PRE-INSTALLATION CONFERENCE

A. Convene a pre-installation conference one week prior to commencing work of this section.

Conduct conference at Project site. Conference shall be attended by Contractor, Contracting Officer, Government's insurer if applicable, testing and inspecting agency representative, roofing Installer and his foreman, roofing system manufacturer's representative, deck Installer and his foreman, and installers whose work interfaces with or affects roofing including installers of roof accessories and roof-mounted equipment.

B. Agenda shall include, but not be limited to the following:

1. Review preparation, methods and procedures related to roofing installation, including manufacturer's written instructions.

2. Review and finalize construction schedule and verify availability of materials, Installer's personnel, equipment, and facilities needed to make progress and avoid delays.

3. Examine deck substrate conditions and finishes for compliance with requirements, including flatness and fastening.

4. Review structural loading limitations of roof deck during and after roofing.

5. Review base flashings, special roofing details, roof drainage, roof penetrations, equipment curbs, and condition of other construction that will affect roofing system.

6. Examine roof and flashing details for conflicts with manufacturer's specifications.

7. Coordinate flashing details at juncture with parapet and adjacent existing roofing for tie-ins.

8. Review code conflicts with UL, FMG, or other requirements.

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9. Review governing regulations and requirements for insurance and certificates if applicable.

10. Establishment of trade related job schedules, including installation of roof mounted equipment.

11. Establishment of schedules and work methods which will prevent roof damage.

12. Coordination of penetrations, curbs and walls on roof to be in place prior to roof installation.

13. Designation of area on job site to be used as work and storage location.

14. Establishment of weather and working conditions to which all parties agree.

15. Establishment of requirements for temporary roofing during installation.

16. Enactment of provisions for monitoring roof installation after completion and prior to acceptance of entire project.

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

18. Other business relating to 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 Contracting Officer.

1.10 DELIVERY, STORAGE, AND HANDLING

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

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

1. Discard and legally dispose of liquid material that cannot be applied within its stated shelf life.

C. Protect roof insulation materials from physical damage and from deterioration by sunlight, moisture, soiling, and other sources. Store in a dry location. Comply with insulation manufacturer's written instructions for handling, storing, and protecting during installation.

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

1.11 SITE CONDITIONS

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

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1.12 WARRANTY

A. Special Manufacturer’s Warranty: Manufacturer's standard form, without monetary limitation, in which manufacturer agrees to repair or replace components of total roofing system that fail in materials, fabrication, or installation within specified warranty period.

Failure includes roof leaks.

1. Special warranty includes roofing membrane, base flashings, roofing membrane accessories, roof insulation, fasteners, cover boards, substrate board, vapor retarder, walkway products, and other components of roofing system.

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

B. Special Installer’s Warranty: Submit roofing Installer's warranty, signed by Installer, covering Work of this Section.

1. Include all components of roofing system such as roofing membrane, base flashing, roof insulation, fasteners, cover boards, and walkway products, and other components of the roofing systems.

2. Warranty Period: 2 years from date of Final Acceptance.

PART 2 - PRODUCTS

2.1 PRODUCTS

A. Basis-of-Design, Terrace Deck Roof Assembly: Siplast Paradiene 20/Teranap 1M roof system.

B. Basis-of-Design, PMMA Roof Assembly: Siplast Parapro/Pro Base SA roof system.

2.2 PERFORMANCE REQUIREMENTS

A. General: Provide installed roofing membrane and base flashings that remain watertight; do not permit the passage of water; and resist specified uplift pressures, thermally induced movement, and exposure to weather without failure.

B. Material Compatibility: Provide roofing materials that are compatible with one another under conditions of service and application required, as demonstrated by roofing manufacturer based on testing and field experience.

C. FM Global Listing: Roofing, base flashings, and component materials shall comply with requirements in FM Global 4450 or FM Global 4470 as part of a roofing system, and shall be listed in FM Global's "RoofNav" for Class 1 or noncombustible construction, as applicable.

Identify materials with FM Global markings.

1. Fire/Windstorm Classification: Class 1A-60.

2. Hail-Resistance Rating: MH.

3. Wind Speed: As indicated on Structural Drawings.

D. Energy Performance: Provide roofing system with initial Solar Reflectance Index not less than 78 when calculated according to ASTM E1980, based on testing identical products by a qualified testing agency.

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E. Energy Performance: Provide roofing system with initial solar reflectance not less than 0.70 and emissivity not less than 0.75 when tested according to CRRC-1.

2.3 SBS-MODIFIED ASPHALT-SHEET MATERIALS

A. Terrace Deck Roof Assembly: A roof membrane assembly consisting of two plies of a prefabricated, reinforced, homogeneous Styrene-Butadiene-Styrene (SBS) block copolymer modified asphalt membrane, applied over a prepared substrate.

1. Basis of Design: Siplast Paradiene 20/Teranap 1M roof system.

2. System Components:

a. Modified Bitumen Base and Stripping Ply: Paradiene 20 TG.

b. Modified Bitumen Finish Ply: Teranap 1M Sand.

c. Vapor Barrier over Plywood: Paradiene SA Vapor Retarder.

d. Reinforcement mats shall be impregnated/saturated and coated each side with

SBS modified bitumen blend and coated one side with a torch grade SBS bitumen blend adhesive layer. The adhesive layer shall be manufactured using a process that embosses the surface with a grooved pattern to provide optimum burn-off of the plastic film and to maximize application rates.

e. The cross-sectional area of the sheet material shall contain no oxidized or non- SBS modified bitumen. The roof system shall pass 500 cycles of ASTM D5849/D5849M Resistance to Cyclic Joint Displacement (fatigue) at 14°F (- 10°C). Passing results shall show no signs of membrane cracking or interply delamination after 500 cycles.

f. The roof system shall pass 200 cycles of ASTM D5849/D5849M after heat conditioning performed in accordance with ASTM D5147/D5147M. The assembly shall possess waterproofing capability, such that a phased roof application, with only the modified bitumen base ply in place, can be achieved for prolonged periods of time without detriment to the watertight integrity of the entire roof system.

B. PMMA Roof Assembly: A roof membrane assembly consisting of one coat or primer and two coats of resin plus polyester fleece fabric, with an applied color finish, applied over a cement board substrate.

1. Basis of Design: Siplast Parapro Roof Membrane fully reinforced with Pro

Fleece.

2. Horizontal (at plane of roof) System Components:

a. Primer: PA-917 Primer.

b. Base sheet: Pro Base SA.

c. Roof Membrane: Parapro Roof Membrane fully reinforced with Pro

Fleece.

d. Color Finish Coat: Pro Color Finish.

3. Vertical (at upturns/penetrations) System Components:

a. Primer: TA-119 Primer.

b. Base sheet: Pro Base SA.

c. Flashing Membrane: Parapro 123 Flashing Membrane fully reinforced with Pro Fleece.

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2.4 SYSTEM COMPONENT PROPERTIES

A. Modified Bitumen Base and Stripping Ply: Paradiene 20 TG (torch grade), table below is replaced:

B. Omitted.

C. Modified Bitumen Finish Ply: Teranap 1M Sand, table below is replaced:

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D. Vapor Barrier: Siplast SA Vapor Retarder, table below is added:

E. Omitted.

F. At Roof Deck Areas with Pedestal & Pavers include 1/4-inch asphaltic protection board and 3/4-inch rubber pad under pedestals that support pavers.

1. Asphalt Protection Board: Premolded semi-rigid protection board consisting of bitumen, mineral core and reinforcement, 1/4-inch thick.

2. Rubber Pad: SBR rubber, high-density polyethylene, or polyurethane paver support pads.

G. At Roof Deck Areas with Pedestal & Pavers include leak detection system.

1. Basis-of-Design: Provide TruGround Primer by Detec Systems or a Detec Systems certified technician. PO Box 31725, Bellingham, WA 98228; telephone: 855-753- 3832; email: info@detecsystems.com; web: http://www.detecsystems.com.

2. Conductive Primer Characteristics:

a. Odor: Odorless

b. Solids by Volume: 23.2%

c. Solids by Weight: 13%

d. Weight per Gallon: 8.2 lb

e. VOC: Less than 100 grams/liter (0.000 lb/gal)

f. Tints (pigments) carbon black

g. Primary Material: water based epoxy resin

3. Conductive Primer Coating for Cover Boards or Insulation:

a. Primer coat shall be applied to properly prepared surface. Minimum coverage of 250 to 350 sq ft per gallon (23 sq m/l to 32 sq m/l) required.

4. Conductive Primer Coating For Plywood, OSB or Other Porous Substrates:

Primer coat shall be applied to properly prepared surface. Minimum coverage of mailto:info@detecsystems.com http://www.detecsystems.com/

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250 to 350 sq ft per gallon (23 sq m/l to 32 sq m/l) required. An additional coat may be required to ensure proper coverage.

H. PA-917 Primer

1. Description: Asphalt/solvent blend designed as a primer prior to the application of SBS roofing and flashing systems.

2. Standards: ASTM D41

3. VOC Content: Less than 350 g/L

I. Pro Base SA:

J. Parapro Roof Membrane:

K. Pro Fleece

1. Description: Non-woven, needle-punched polyester fabric reinforcement compatible with Parapro liquid products.

2. Nominal Thickness: 40 mils

3. Weight: 110 g/m2

4. Water Absorption: Less than 1%

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L. Pro Color Finish

1. Description: Pigmented, multi-component, fast curing PMMA resin.

2. VOC Content: Less than 25 g/L (catalyzed) per EPA test method 24

M. Pro Prep M

1. Description: Clear, blended solvent used to clean and prepare cured liquid-applied membrane systems.

N. TA-119 Primer

1. Description: Single component, water-based resinous primer designed for use with and to facilitate adhesion of self-adhesive roofing and waterproofing membranes.

2. VOC Content: Less than 50 g/L

O. Parapro Flashing Resin

1. Description: Multi-component, fast curing, flexible PMMA resin for use in constructing the Parapro 123 Flashing System.

2. VOC Content: Less than 25 g/L (catalyzed) per EPA test method 24

P. ProPaste Resin

1. Description: A multi-component, fast curing, flexible PMMA paste used for remediation of depressions in substrate surfaces or to remediate surface irregularities prior to application of membrane.

2. VOC Content: Less than 25 g/L.

2.5 AUXILIARY ROOFING MEMBRANE MATERIALS

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

B. Under Roof Insulation/Over Plywood Sheathing: Siplast SA Vapor Retarder.

C. Flashing:

1. Basis of Design: Siplast Parapro 123 PMMA flashing.

2. Description: Layered application consisting of a base and top coat of catalyzed, thixotropic PMMA resin encapsulating a layer of polyester fleece.

3. Locations: Use at all penetrations through the roofing membrane.

D. Omitted.

E. Mastic Sealant: Polyisobutylene, plain or modified bitumen, nonhardening, nonmigrating, nonskinning, and nondrying.

F. Fasteners: Factory-coated steel fasteners and metal or plastic plates meeting corrosion-resistance provisions in FMG 4470, designed for fastening roofing membrane components to substrate, tested by manufacturer for required pullout strength, and acceptable to roofing system manufacturer.

G. Metal Flashing Sheet: See Section 07 60 00.

H. Omitted.

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I. Omitted.

2.6 ROOF INSULATION

A. General: Provide preformed roof insulation boards that comply with requirements and referenced standards, selected from manufacturer's standard sizes and of thicknesses indicated.

B. Cover Board:

1. Basis of Design: DensDeck Prime by Georgia Pacific Corporation.

2. Description: 1/2-inch-thick gypsum cover board.

C. Roof Insulation:

1. Basis of Design: Insulfoam Type XV 60 psi (high compressive strength)

2. Expanded Polystyrene (EPS) Tapered Insulation, thickness as indicated on Drawings.

3. Minimum R-Value: R4.6 per inch.

4. Overall Thickness: As indicated on Drawings.

D. Foam Crickets: Type XV, 60 psi EPS.

1. Provide crickets preformed to 45-degree angle; at roof parapet walls, skylights, and other vertical edges where indicated on Drawings; 4-inch high (5-inch face) minimum.

2. Use 3-inch-high cants only where clearance will not permit a 4-inch cant. Miter corners and tightly butt joints.

E. Tapered Insulation: ASTM C518, Type XV, 60 psi EPS; factory-tapered insulation boards fabricated to slope of 1/4-inch per 12-inches (1:48), unless otherwise indicated.

F. Provide preformed saddles, crickets, tapered edge strips, and other insulation shapes where indicated for sloping to drain. Fabricate to slopes indicated.

G. Perlite Cant Strips: A cant strip composed of expanded volcanic minerals combined with waterproofing binders. The top surface shall be pre-treated with an asphalt-based coating.

The face of the cant shall have a nominal 4-inch dimension.

H. Adhesives:

1. At Cover Board and Insulation, Basis of Design: Parafast adhesive.

2. Omitted.

3. Description (Parafast): Quick curing, two-component, bead-applied polyurethane adhesive.

4. Omitted.

2.7 INSULATION ACCESSORIES

A. General: Roof insulation accessories recommended by insulation manufacturer for intended use and compatible with membrane roofing.

B. Omitted.

C. Provide preformed saddles, crickets, tapered edge strips, and other shapes where indicated for sloping to drain. Fabricate to slopes indicated.

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2.8 ACCESSORIES

A. Miscellaneous Accessories: Provide miscellaneous accessories recommended by roofing system manufacturer.

B. Omitted.

C. Ceramic Granules: No. 11 grade specification ceramic granules of color scheme matching the granule surfacing of the finish ply.

D. Omitted.

E. Omitted.

F. Primers as recommended by the roof membrane manufacturer

G. Aggregate Surfacing: ASTM D1863/D1863M, No. 6 or No. 67, clean, dry, opaque, water-worn gravel or crushed stone, free of sharp edges crushed slag, free of sharp edges.

1. Color: As selected by Contracting Officer.

H. Miscellaneous Accessories: Provide miscellaneous accessories recommended by roofing system manufacturer.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine substrates, areas, and conditions, with Installer present, for compliance with the following requirements and other conditions affecting performance of roofing system:

1. Verify that roof openings and penetrations are in place and set and braced and that roof drains are securely clamped in place.

2. Verify that wood cants, blocking, curbs, and nailers are securely anchored to roof deck at penetrations and terminations and that nailers match thicknesses of insulation.

3. Verify that surface plane flatness and fastening of steel roof deck complies with requirements in Section 05 12 00.

4. Proceed with installation only after unsatisfactory conditions have been corrected.

3.2 PREPARATION

A. Clean substrate of dust, debris, moisture, and other substances detrimental to roofing installation according to roofing system manufacturer’s written instructions. Remove sharp projections.

B. Prevent materials from entering and clogging roof drains and conductors and from spilling or migrating onto surfaces of other construction. Remove roof-drain plugs when no work is taking place or when rain is forecast.

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3.3 VAPOR RETARDER INSTALLATION

A. Adhere the vapor retarder directly to the substrate, free of wrinkles, creases, or fishmouths. Exert sufficient pressure on the roll during application to ensure the prevention of air pockets. Unroll the sheet and set it into place utilizing minimum 3 inch side and end laps. Offset end laps of adjacent sheets a minimum of 3 feet. While maintaining the placement of the material, carefully remove the split propylene release film from the sides, keeping the film low and at an angle to the length of the sheet. Pull the release film free from the underside of the sheet while pressing the material into place with a follow tool as the film is being removed. Using a steel roller, apply pressure to ensure a seal at all side, end, and T-laps.

B. Torch-apply IREX 40 following manufacturer’s written instructions.

3.4 INSULATION INSTALLATION

A. Comply with roofing system manufacturer’s written instructions for installing roof insulation.

B. Insulation: Install insulation panels with end joints offset; edges of the panels shall be in moderate contact without forcing applied in strict accordance with the insulation manufacturer's requirements and the following instructions. Where insulation is installed in two or more layers, stagger joints between layers. Maintain a maximum panel size of 4 feet by 8 feet for expanded polystyrene insulation applied in insulation adhesive. Install only as much insulation as can be made watertight within the same work day.

1. Insulation - multiple layer: Install all layers in an application of the specified insulation adhesive. Follow the requirements and guidelines of the insulation adhesive manufacturer/supplier. Stagger the panel joints between insulation layers.

C. Insulation Cant Strips: Install and secure preformed 45-degree insulation cant strips at junctions of roofing system with vertical surfaces or angle changes greater than 45 degrees.

D. Crickets: Construct crickets of tapered insulation panels in a layout as indicated on the roof plan.

E. Install insulation under area of roofing to conform to slopes indicated.

F. Install insulation with long joints of insulation in a continuous straight line with end joints staggered between rows, abutting edges and ends between boards. Fill gaps exceeding 1/4 inch (6 mm) with insulation.

1. Cut and fit insulation within 1/4 inch (6 mm) of nailers, projections, and penetrations.

G. Install one or more layers of insulation under area of roofing to achieve required thickness.

Where overall insulation thickness is 2 inches (50 mm) or greater, install 2 or more layers with joints of each succeeding layer staggered from joints of previous layer a minimum of 6 inches (150 mm) in each direction.

H. Trim surface of insulation where necessary at roof drains so completed surface is flush and does not restrict flow of water.

I. Install tapered edge strips at perimeter edges of roof that do not terminate at vertical surfaces.

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J. Install cover boards over insulation with long joints in continuous straight lines with end joints staggered between rows. Offset joints of insulation below a minimum of 6 inches in each direction. Loosely butt cover boards together. Tape joints if required by roofing system manufacturer.

1. Adhere cover boards to resist uplift pressure at corners, perimeter, and field of roof.

3.5 CONDUCTIVE PRIMER (FOR ELECTRONIC LEAK DETECTION)

INSTALLATION

A. Surface Preparation:

1. Do not begin primer installation until substrates have been properly prepared.

2. Surface to be clean and dry. Heavy dirt, grease, or other contaminants need to be removed using proper cleaning methods in accordance with conductive primer manufacturer’s installation instructions.

3. During hot temperatures, surfaces can be extremely hot. Special attention is needed. Apply product in small areas to test performance.

4. For previously coated surfaces, certain plastics (i.e. PVC) or glossy surface finishes, reference manufacturer’s written recommendations.

B. Application: Install in accordance with manufacturer’s written installation instructions.

C. Mixing: Open and mix in accordance with manufacturer’s written recommendations.

D. Use boot covers to prevent tracking conductive primer on clean substrate.

E. Continuity Bonding:

1. If joints between sheets are larger than 1/8-inch, apply the conductive primer with a paint brush to the T-joints to ensure continuity from board to board.

2. Continuity bonding is required between previously coated sheets and between horizontal to vertical transitions to maintain electrical continuity.

3. If the sheets are precoated, contact manufacturer.

F. Apply primer to sides of metallic penetrations such as drains, HVAC units, and vents while applying the primer to the main areas of the substrate.

G. If no metallic penetrations are located within the area where conductive primer is being installed, then a grounding object must be installed. Any metallic object can be fastened to the structural deck and connect to the primer by coating the side of the object with the primer. Flash grounding object with roofing membrane in accordance with manufacturer’s written instructions.

H. Drying Time:

1. Drying time depends on temperature and relative humidity (RH). Conductive primer must be completely dry before application of subsequent materials.

3.6 ROOFING MEMBRANE INSTALLATION, GENERAL

A. Membrane Application: Apply roofing in accordance with roofing system manufacturer's instructions and the following requirements. Application of roofing membrane components shall immediately follow application of base sheet and insulation as a continuous operation.

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B. Cooperate with testing and inspecting agencies engaged or required to perform services for installing roofing system.

C. Coordinate installing roofing system so insulation and other components of the roofing membrane system not permanently exposed are not subjected to precipitation or left uncovered at the end of the workday or when rain is forecast.

1. Provide tie-offs at end of each day's work to cover exposed roofing membrane sheets and insulation with a course of coated felt set in roofing cement or hot roofing asphalt with joints and edges sealed.

2. Complete terminations and base flashings and provide temporary seals to prevent water from entering completed sections of roofing system.

3. Remove and discard temporary seals before beginning work on adjoining roofing.

D. Omitted.

3.7 TERRACE DECK SBS-MODIFIED BITUMINOUS MEMBRANE INSTALLATION

A. Install modified bituminous roofing membrane sheet and cap sheet according to roofing manufacturer's written instructions, starting at low point of roofing system. Extend roofing membrane sheets over and terminate beyond cants, installing as follows:

1. Unroll roofing membrane sheets and allow them to relax for minimum time period required by manufacturer.

B. Omitted.

C. Omitted.

D. Omitted.

E. Omitted.

F. Bitumen Consistency: Cutting or alterations of bitumen, primer, and sealants will not be permitted.

G. Roofing Application: Apply all layers of roofing free of wrinkles, creases or fishmouths.

Exert sufficient pressure on the roll during application to ensure prevention of air pockets.

1. Apply all layers of roofing perpendicular to the slope of the deck.

2. Fully bond the base ply to the prepared substrate, utilizing minimum 3 inch side and end laps. Apply each sheet directly behind the asphalt/torch/cold adhesive applicator.

Cut a dog ear angle at the end laps on overlapping selvage edges. Using a clean trowel, apply top pressure to top seal T-laps immediately following sheet application. Stagger end laps a minimum of 3-feet.

3. Fully bond the finish ply to the base ply, utilizing minimum 3-inch side and end laps.

Apply each sheet directly behind the asphalt/torch/cold adhesive applicator. Stagger end laps of the finish ply a minimum 3-feet. Cut a dog ear angle at the end laps on overlapping selvage edges. Using a clean trowel, apply top pressure to top seal T-laps immediately following sheet application. Stagger side laps of the finish ply a minimum 12-inches from side laps in the underlying base ply. Stagger end laps of the finish ply a minimum 3-feet from end laps in the underlying base ply.

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H. Laps: Accurately align roofing membrane sheets, without stretching, and maintain uniform side and end laps. Stagger end laps minimum of 36”. Completely bond and seal laps, leaving no voids.

1. Repair tears and voids in laps and lapped seams not completely sealed.

2. Apply roofing granules to cover exuded bead at laps while bead is hot.

I. Install roofing membrane sheets so side and end laps shed water.

J. Granule Embedment: Broadcast mineral granules over all bitumen overruns on the finish ply surface, while the bitumen is still hot or the adhesive is soft, to ensure a monolithic surface color.

K. Torch-applied Flashing Application (granule-surfaced):

1. Cut the cant backing sheet into 12-inch widths and peel the release film from the back of the sheet. Set the sheet into place over the primed substrate extending 6 inches onto the field of the roof area and 6 inches up the vertical surface utilizing minimum 3-inch laps.

2. Set the non-combustible cant into place dry prior to installation of the roof membrane base ply. Flash walls and curbs using the reinforcing sheet and the granule-surfaced flashing membrane.

3. After the base ply has been applied to the top of the cant, prime the base ply surfaces to receive the reinforcing sheet. Fully adhere the reinforcing sheet, utilizing minimum 3-inch side laps onto the primed base ply surface and up the primed wall or curb to the desired flashing height.

4. After the final roofing ply has been applied to the top of the cant, prepare the surface area that is to receive flashing coverage by torch heating granular surfaces or by application of asphalt primer; allowing primer to dry thoroughly.

5. Torch-apply the granule-surfaced flashing into place using three-foot widths (cut off the end of roll) always lapping the factory selvage edge.

6. Stagger the laps of the flashing layer from lap seams in the reinforcing layer. Extend the flashing sheet a minimum of 4 inches beyond the toe of the cant onto the prepared surface of the finished roof and up the wall or curb to the desired flashing height.

7. Exert pressure on the flashing sheet during application to ensure complete contact with the vertical/horizontal surfaces, preventing air pockets. Check and seal all loose laps and edges.

8. Nail the top edge of the flashing on 9-inch centers. (See manufacturer's schematic for visual interpretation).

L. Water Cut-Off: At end of day's work, or when precipitation is imminent, construct a water cut-off at all open edges. Cut-offs can be built using asphalt or plastic cement and roofing felts, constructed to withstand protracted periods of service. Cut-offs must be completely removed prior to the resumption of roofing.

M. Sealant: Apply a smooth continuous bead of the specified sealant at the exposed finish ply edge transition to metal flashings incorporated into the roof system.

3.8 PMMA ROOF ASSEMBLY INSTALLATION

A. Application of Base Ply: Apply the modified bitumen ply sheet with side laps running perpendicular to the direction of the slope. Exert sufficient pressure on the roll during application to ensure prevention of air pockets, wrinkles, creases or fishmouths. Refer

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to the manufacturer’s guidelines for maximum sheet lengths and special fastening of the head laps where the roof deck slope exceeds 1/2 inch per foot.

B. Application of Bituminous Stripping: Apply the specified base flashing materials in accordance with the manufacturer’s standard details. Notify the design team immediately of any flashing heights below 8 inches. Flash walls and curbs using the reinforcing sheet. Exert pressure on the flashing reinforcing sheet during application to ensure complete contact with the vertical/horizontal surfaces, preventing air pockets.

Check and seal all loose laps and edges. Nail the top edge of the flashing reinforcing on 9 inch centers. Install the specified liquid-applied flashing system in accordance with the membrane system manufacturer’s printed installer’s guidelines and other applicable written recommendations as provided by the manufacturer.

C. Mixing of resin products: Pour the desired quantity of resin into a clean container and using a spiral mixer or mixing paddle, stir the liquid for the time period specified by the resin manufacturer. Calculate the amount of catalyst powder or liquid needed using the manufacturer's guidelines and add the pre-measured catalyst to the resin component. Mix again for the time period specified by the resin manufacturer, ensuring that the product is free from swirls and bubbles. To avoid aeration, do not use a spiral mixer unless the spiral section of the mixer can be fully contained in the liquid during the mixing process. Mix only enough product to ensure that it can be applied before pot life expires.

D. Preparation Paste and Primer Application

1. Primer Application: Apply catalyzed primer resin using a roller or brush at the rate specified by the primer manufacturer over qualified and prepared substrates. Apply primer resin at the increased rate specified by the primer manufacturer over DensDeck Prime or other porous substrates. Do not let resin pool or pond. Do not under-apply or over-apply primers as this may interfere with proper primer catalyzation. Make allowances for waste, including saturation of roller covers and application equipment.

2. Paste Application: Apply catalyzed preparation paste using a trowel over prepared and primed substrates. Before application of any resin product over cured paste, wipe the surface of the paste using the specified cleaner/solvent and allow to dry. Treat the surface again if not followed up by resin application within 60 minutes.

E. Flashing and Field Membrane Application

1. Base Flashing Application:

a. Using masking tape, mask the perimeter of the area to receive the flashing system. Apply resin primer to substrates requiring additional preparation and allow primer to cure.

b. Pre-cut fleece to ensure a proper fit at transitions and corners prior to membrane application.

c. Apply an even, generous base coat of flashing resin to prepared surfaces using a roller at the rate specified by the resin manufacturer. Work the fleece into the wet, catalyzed resin using a brush or roller to fully embed the fleece in the resin and remove trapped air. Lap fleece layers a minimum of 2 inch (5 cm) and apply an additional coat of catalyzed resin between layers of overlapping fleece. Again using a roller, apply an even top coat of catalyzed resin immediately following embedment of the fleece at the rate

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specified by the resin manufacturer, ensuring that the fleece is fully saturated. Ensure that the flashing resin is applied to extend beyond the fleece (maximum ¼-inch (6 mm). Remove the tape before the catalyzed resin cures. Make allowances for waste, including saturation of roller covers and application equipment.

d. Should work be interrupted for more than 12 hours or the surface of the cured resin becomes dirty or contaminated by the elements, wipe the surface to be lapped with new flashing resin using the specified cleaner/solvent. Allow the surface to dry for a minimum 20 minutes and a maximum 60 minutes before continuing work.

2. Field Membrane Application

a. Using the specified cleaner/solvent, wipe flashing membrane surfaces to be lapped with field membrane. Allow the surface to dry for a minimum of 20 minutes before continuing work.

b. Apply an even, generous base coat of field membrane resin to prepared surfaces using a roller at the rate specified by the resin manufacturer.

Work the fleece into the wet, catalyzed resin using a 9-inch roller to fully embed the fleece in the resin and remove trapped air. Lap fleece layers a minimum of 2 inch (5 cm) and apply an additional coat of catalyzed resin between layers of overlapping fleece. Again using a roller, apply an even top coat of catalyzed resin immediately following embedment of the fleece at the rate specified by the resin manufacturer, ensuring that the fleece is fully saturated. Make allowances for waste, including saturation of roller covers and application equipment. Allow 2 hours cure time prior to exposing the membrane to foot traffic.

3. Color Finish Application

a. Ensure that the field and flashing membrane has been in place for a minimum of 2 hours. Using the specified cleaner/solvent, wipe field membrane surfaces to receive the color finish layer. Allow the surface to dry for a minimum of 20 minutes before continuing work.

b. Apply an even top coat of catalyzed color finish resin at the rate specified by the resin manufacturer. Allow 2 hours cure time prior to exposing the membrane to foot traffic.

3.9 FIELD QUALITY CONTROL (Article Renumbered)

A. Testing Agency: Contractor will engage a qualified independent testing and inspecting agency to perform roof tests and inspections and to prepare test reports.

B. Test Cuts: Test specimens will be removed to evaluate problems observed during quality-assurance inspections of roofing membrane as follows:

1. Approximate quantities of components within roofing membrane will be determined according to ASTM D3617.

2. Test specimens will be examined for interply voids according to ASTM D3617 and to comply with criteria established in Appendix 3 of ARMA/NRCA's "Quality Control Guidelines for the Application of Polymer Modified Bitumen Roofing."

C. Adhesion pull-testing of base sheet/vapor barrier as approved by and accepted by manufacturer.

D. Omitted.

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E. Electronic Leak Detection:

1. Perform Electronic Leak Detection test over entire waterproofing/roofing membrane installation. For areas to receive ELD testing, General Contractor’s contracted ELD service company is to provide the following:

a. Prior to installation of waterproofing/roofing membrane, a complete installation and field testing procedure guideline as provided by the ELD system manufacturer is to be provided to the General Contractor, installer, manufacturer, Architect, and Owner.

b. Thoroughly wet waterproofing/roofing membrane in area of test. Wetting can be accomplished by hand or mechanical spray devices. Membrane must be wet during testing procedures. Ponded water is not necessary. Plug drains and provide barriers necessary to contain water. Allow for overflow to protect the building in the event of rain.

c. Visual inspect and perform ELD testing to locate membrane breaches, if any. Document location of breaches found by the ELD test and visual inspections, and provide reports to the General Contractor, installer, manufacturer, Architect and Owner.

d. Repair breaches found per waterproofing/roofing manufacturer’s guidelines.

e. Once membrane ELD testing is concluded and repairs are complete, immediately protect membrane. Prohibit non-waterproofing construction traffic, activity and material storage on tested membrane.

F. Final Roof Inspection: Arrange for roofing system manufacturer's technical personnel to inspect roofing installation on completion and submit report to Contracting Officer.

1. Notify Contracting Officer 48 hours in advance of date and time of inspection.

G. Repair or remove and replace components of roofing system where test results or inspections indicate that they do not comply with specified requirements.

H. Additional testing and inspecting, at Contractor's expense, will be performed to determine compliance of replaced or additional work with specified requirements.

3.10 ADJUSTING (Article Renumbered)

A. Correct deficiencies in or remove roofing system that does not comply with requirements, repair substrates, and repair or reinstall roofing system to a condition free of damage and deterioration at time of Substantial Completion and according to warranty requirements.

3.11 CLEANING (Article Renumbered)

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

B. Construction Waste Management: Manage construction waste in accordance with provisions of Section 01 74 19 Construction Waste Management and Disposal. Submit documentation for Credit MRp2/MRc5 to satisfy the requirements of that Section.

1. Fold up all metal trim scraps, flatten and place is the designated area for recycling.

2. Collect wood packing shims and pallets; place is the designated area for recycling.

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3.12 PROTECTION (Article Renumbered)

A. Protect roofing system from damage and wear during remainder of construction period.

When remaining construction will not affect or endanger roofing, inspect roofing for deterioration and damage, describing its nature and extent in a written report, with copies to Contracting Officer.

B. Correct deficiencies in or remove roofing system that does not comply with requirements, repair substrates, and repair or reinstall roofing system to a condition free of damage and deterioration at time of Substantial Completion and according to warranty requirements.

END OF SECTION 07 52 16