Attachment_5_-_SOW_Appendix_A_3.pdf

BUILT-UP ROOF MEMBRANE REPAIR PROCEDURES BUR1

Cutting and Patching a BUR System The following procedure is used in repair situations that require cutting a BUR system and installing a patch to return the membrane to a watertight condition.

TOOLS AND SUPPLIES:

o Hot-work gloves o Solvent-resistant gloves o Eye or full-face protection o Powered saw o Utility knife o Insulation knife o Measuring tape o Compatible roof insulation board o Insulation fasteners o Stiff-bristle broom o Spud bar o Shovel o Asphalt primer o Asphalt roof cement or cold-applied adhesive and reinforcement o Polymer-modified bitumen sheet o Detailing torch or hot-air gun o Trowel o Compatible surfacing (e.g., aggregate, granules, coating)

1 Determine whether water is present in the roof system. Visually examine the space under the defect for water. Feel for wetness and damp materials.

Visually examine the deck and space under the reported leak area. Note the general condition of the deck; where deteriorated, exercise caution traffick-ing the area. Note location of penetrations near ac-tive leak(s) to find the correct area once on the roof.

From penetration locations noted underneath the deck, step off the approximate leak location and look for obvious cuts and punctures. Check for debris penetrating the membrane; remove if present.

2 Where no water penetration is found, follow BUR 2—Patching a BUR Membrane instructions to return the membrane to a watertight condition.

Where water entry has damaged the roof system, the membrane will need to be cut, wet or damaged insu-lation replaced and deck inspected for damage.

Note the observed damage in the service call report and document it with photos. Forward this docu-mentation to your supervisor.

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YDP YAO - ATTACHMENT C

Alexander Silva Rectangle

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3 To promote complete adhesion of a patch, it is necessary to prepare the surface where the patch will tie into the existing membrane. Remove rough spots, debris, contaminants, aggregate or loose surfacing.

• Where it is necessary to cut out a large aggregate-surfaced membrane section larger than about two feet across, spud an approximately 10- to 12-inch-wide perimeter around the section to be removed. Prepare exposed flood coat for patch application—apply heat with a detailing torch or hot-air gun; smooth out irregularities; and allow it to cool.

• Degranulate granule-surfaced cap sheets—apply heat and press granule surfacing into the mem-brane bitumen.

• For membranes surfaced with aluminum coatings, use a stiff-bristle broom to release and sweep away loose coating. Use a hot-air gun or— where use of open flames is permitted—detailing torch flame to heat the patch area only until the surface turns black.

• For membranes coated with elastomeric coating, use a hot-air gun or—where use of open flames is permitted—roofing torch flame to heat the surface sufficiently to scrape the coating off.

4 Cut open the membrane and remove wet or damaged insulation. Note observed damage in the service call report and document it with photos.

Where deck damage is found, further evaluation beyond the scope of this manual may be necessary.

5 Size and cut compatible replacement board insulation to obtain a close fit consistent with the thickness of the existing insulation. Attach the re-placement insulation.

6 Where BUR flood coat has been exposed and use of open flames is permitted, use detailing torch flame to eliminate surface dust in preparation for priming.

7 Lightly prime the surface of the membrane (asphalt BUR only; coal tar BUR typically does not require priming) with asphalt primer and allow it to dry. Primer contains solvents and is used to enhance adhesion; however, overuse of primer can harm the membrane and inhibit adhesion of newly applied material.

8 Where patch application will not use hot work, as an option, seal the cut perimeter with compatible roof cement.

Where plies are removed from the membrane, in-stall the same number of plies of reinforcing mate-rial in cold-applied adhesive or hot bitumen. Extend the bottom ply at least 6 inches beyond the area to be repaired and each succeeding ply at least 3 inches beyond the previous ply. When using hot bitumen as the method of application, take care to maintain the bitumen at equiviscous temperaturwe.

As an alternative, on asphalt BUR membranes only, a minimum of one ply of smooth-surfaced polymer-modified bitumen sheet may be installed in com-patible cold-applied adhesive, by torch application or in hot asphalt— whichever is appropriate for the modified sheet being used. Where torch application is used over combustible roof decks, first apply a self-adhering sheet backer over the cut section. Where a heat-welded patch of polymer-modified bitumen sheet was installed, check patch edges for voids by probing with a trowel. Where voids are found, use the trowel to lift the unbonded edge, apply heat to the underside and press the trowel down over the area until bleed-out is visible.

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When using hot asphalt as the method of applica-tion, use Type IV asphalt and ensure it is hot enough to promote thorough adhesion of the patch; this usually requires asphalt be applied at a temperature greater than EVT. Asphalt should not be heated above 550 F or 25 degrees Fahrenheit below its flash-point temperature—whichever is lower.

9 As an option for aggregate-surfaced BUR, three-course the patch perimeter using compatible roof cement and reinforcement.

10 Reapply the surfacing as required:

• Install a granule-surfaced cap sheet in compati-ble cold-applied adhesive, hot asphalt or by torch application as appropriate. Extend the cap sheet a minimum of 6 inches beyond the repaired area.

• In exposed flood coat areas of aggregate-surfaced membranes, embed aggregate in compatible asphalt roof cement, cold-applied adhesive or hot bitumen.

• Apply a surface coating compatible with the ex-isting surfacing. Liquid-applied coatings should be installed per the manufacturer’s instructions, which may include a waiting period. For small repair areas, it is a common practice to apply the coating immediately after the membrane repair is made. 9

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BUILT-UP ROOF MEMBRANE REPAIR PROCEDURES BUR2

Patching a BUR Membrane The following procedure is used in repair situations that require installing a patch to return the membrane to a watertight condition.

TOOLS AND SUPPLIES:

o Hot-work gloves o Solvent-resistant gloves o Eye or full-face protection o Utility knife o Measuring tape o Stiff-bristle broom o Spud bar o Shovel o Asphalt primer o Polymer-modified bitumen sheet o Asphalt roof cement or cold-applied adhesive and reinforcement o Detailing torch or hot-air gun o Trowel o Compatible surfacing (e.g., aggregate, granules, coating)

1 Remove rough spots, debris, contaminants and loose surfacing from the membrane or flashing sur-face to be repaired. Prepare a work area that extends a minimum of 18 inches beyond the perimeter of the defect.

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2 To promote complete adhesion of a patch, it is necessary to prepare the surface where the patch will tie into the existing membrane.

• Spud aggregate surfacing to expose asphalt flood coat. Prepare exposed flood coat for patch appli-cation: Apply heat with a roofing torch (torch-prime) or hot-air gun; smooth out irregularities;

and allow it to cool.

• Degranulate granule-surfaced cap sheets— apply heat and press granule surfacing into the bitumen.

• For membranes surfaced with aluminum coat-ings, use a stiff-bristle broom to release and sweep away loose coating. Use a hot-air gun or— where use of open flames is permitted—roofing torch flame to heat the patch area only until the surface turns black.

• For membranes coated with elastomeric coating, use a hot-air gun or—where use of open flames is permitted—roofing torch flame to heat the surface sufficiently to scrape the coating off.

3 Lightly prime the surface of the membrane (asphalt BUR only; coal tar BUR typically does not require priming) with asphalt primer and allow it to dry. Primer contains solvents and is used to enhance adhesion; however, overuse of primer can harm the membrane and inhibit adhesion of newly applied material. 3

4 Where existing plies were not removed, it is acceptable to apply a three-coursed patch: base application of asphalt cement, reinforcing scrim and second application of asphalt cement.

Where plies are removed from the membrane, install the same number of plies of reinforcing material in cold-applied adhesive or hot bitumen.

Extend the bottom ply at least 6 inches beyond the area to be repaired and each succeeding ply at least 3 inches beyond the previous ply. When using hot bitumen as the method of application, take care to maintain the bitumen at EVT.

As an alternative, on asphalt BUR membranes only, a minimum of one ply of smooth-surfaced polymer-modified bitumen sheet may be installed in com-patible cold-applied adhesive, by torch application or in hot asphalt, whichever is appropriate for the modified sheet being used. Where a heat-welded patch of polymer-modified bitumen sheet was in-stalled, check patch edges for voids by probing with a trowel. Where voids are found, use the trowel to lift the unbonded edge, apply heat to the underside and press the trowel down over the area until bleed-out is visible.

When using hot asphalt as the method of applica-tion, use Type IV asphalt and ensure it is hot enough to promote thorough adhesion of the patch; this usually requires that asphalt be applied at a tem-perature greater than EVT. Asphalt should not be heated above 550 F or 25 degrees Fahrenheit below its flash-point temperature—whichever is lower.

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5 Reapply the surfacing as required:

• For aggregate-surfaced membranes, embed aggregate in compatible roof cement, cold-applied adhesive or hot bitumen.

• Install a granule-surfaced cap sheet in compati-ble cold-applied adhesive, hot asphalt or by torch application as appropriate. Extend the cap sheet a minimum of 6 inches (150 mm) beyond the repaired area.

• Apply a surface coating compatible with the exist-ing surfacing. Liquid-applied coatings should be installed per the manufacturer’s instructions, which may include a waiting period. For small repair areas, it is a common practice to apply the coating immediately after the membrane repair is made.

BUILT-UP ROOF MEMBRANE REPAIR PROCEDURES BUR10

Loose or Displaced Wall and Base Flashings The following procedure is used to correct problems with attachment of wall and base flashings:

TOOLS AND SUPPLIES:

o Hot-work gloves o Solvent-resistant gloves o Eye or full-face protection o Utility knife o Measuring tape o Trowel o Push broom, brush or leaf blower o Lumber crayon o Detailing torch or hot-air gun o Asphalt primer o Compatible polymer-modified bitumen sheet(s) o Compatible flashing-grade cold-applied adhesive or roof cement and reinforcing scrim o Compatible surfacing (e.g., bulk granules, other aggregate, coating) o Fasteners and plates suitable for flashing substrate

1 Determine whether water infiltrated the flashing.

Cut open the flashing. Visually examine the under-lying materials and space behind the flashing. Feel for wetness and damp materials. Check for debris;

remove where present.

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2 Where permanent damage to the substrate re-sulting from water infiltration is found, further eval-uation beyond the scope of this manual is necessary.

Note observed substrate damage in the service call report and document it with photos.

3 Cut out and remove flashing materials that are unadhered, wrinkled or displaced until reaching adhered material. Alternatively, trim excess material and adhere loose flashing using a detailing torch or compatible flashing grade adhesive as appropriate.

4 Remove rough spots, debris, contaminants, loose aggregate or surfacing from the surface of the membrane or flashing to be repaired. The area to be prepared should extend a minimum of 18 inches be-yond the perimeter of the defect to provide an ample clean work area on which to install the patch and tie it into the existing membrane and flashing material.

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5 To promote complete adhesion of a patch, it is necessary to prepare the surface where the patch will tie into the existing membrane.

• Spud aggregate surfacing to expose asphalt flood coat. Prepare exposed flood coat for patch appli-cation: Apply heat with a roofing torch (torch-prime) or hot-air gun; smooth out irregularities;

and allow it to cool.

• Degranulate granule-surfaced sheets—apply heat and press granule surfacing into the bitumen. Alternatively, where a patch will be installed in cold-applied adhesive, prime the surface of the membrane with asphalt primer and allow it to dry.

• For membranes surfaced with aluminum coat-ings, use a stiff-bristle broom to release and sweep away loose coating. Use a hot-air gun or— where use of open flames is permitted—roofing torch flame to heat the patch area only until the surface turns black. Alternatively, where a patch will be installed in cold-applied adhesive, prime the surface of the membrane with asphalt primer and allow it to dry.

• For membranes coated with elastomeric coating, use a hot-air gun or—where use of open flames is permitted—roofing torch flame to heat the surface sufficiently to scrape the coating off.

• For foil-surfaced flashings, remove the foil sur-facing from the area where the patch will tie into the existing flashing. See MB 7—Delamination of Foil Surfacing for instructions.

6 Where the area to be patched was not degran-ulated or heated, such as when installing a patch in cold-applied adhesive, lightly prime the surface (asphalt BUR only; coal tar BUR typically does not require priming) with asphalt primer and allow it to dry. Primer contains solvents and is used to enhance adhesion; however, overuse of primer can harm the membrane.

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7 Install a minimum of one ply of smooth-surfaced polymer-modified bitumen sheet in compatible cold-applied adhesive, by torch application or in hot asphalt—whichever is appropriate for the modified sheet being used. When using hot asphalt as the method of application, use Type IV asphalt and en-sure it is hot enough to promote thorough adhesion of the patch; this usually requires that asphalt be applied at a temperature greater than EVT. Asphalt should not be heated above 550 F or 25 degrees Fahrenheit below its flash-point temperature— whichever is lower.

Caution: Do not use the torch application method where wood fiber cants are installed.

8 Where a heat-welded patch of polymer-modified bitumen sheet was installed, check patch edges for voids by probing with a trowel. Where voids are found, use the trowel to lift the unbonded edge, ap-ply heat to the underside and press the trowel down over the area until bleed-out is visible.

9 Fasten the top of the base flashing to the wall or curb approximately 8 inches on center using fasten-ers suitable for the substrate. Termination bar and fasteners also may be used to secure the top of the base flashing. Fastener length should be sufficient to achieve a minimum of ¾-of-an-inch penetration into the substrate.

10 With patches adhered in cold-applied adhe-sive, three-course the top of the repaired area with vertical grade plastic cement and embed one ply of glass reinforcing fabric and a feathered topping of plastic cement.

11 Apply surfacing as required:

• Embed aggregate in compatible cold-applied adhesive or hot bitumen.

• Install a cap sheet with suitable surfacing in compatible cold-applied adhesive, hot asphalt or by torch application as appropriate. Extend the cap sheet a minimum of 6 inches beyond the repaired area.

• Apply a surface coating compatible with the ex-isting surfacing. Liquid-applied coatings should be installed per the manufacturer’s instructions, which may include a waiting period. For small repair areas, it is a common practice to apply the coating immediately after the membrane repair is made.

12 Reinstall existing serviceable counterflashing or add a new counterflashing as required for a per-manent repair. See MF-2—Metal Counterflashing for instructions.

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MECHANICALLY ATTACHED METAL FLASHING

REPAIR PROCEDURES MF3

Premanufactured Expansion Joint Cover

TOOLS AND SUPPLIES:

o Eye protection o Solvent-resistant gloves o Utility knife o Plastic scraper o Residue-free cleaner, water, scrubbing pad or brush o Rags or towels o Rounded-tip probe o Hand roller o Caulking gun o Power drill, suitable drill bit(s) and driver or nut setter o Compatible fasteners (gasketed crews, roofing nails) o EPDM primer, applicator pad or brush o Uncured self-adhering EPDM flashing sheet o EPDM lap sealant

1 Remove loose fasteners and refasten loose expan-sion joint cover as necessary using gasketed screws compatible with the joint cover metal, appropriate for the substrate and either of a larger diameter or fastened in an adjacent location (new hole). Fastener length should be sufficient to achieve a minimum ¾-of-an-inch penetration into the substrate. Seal any exposed holes with a compatible gun-grade elastomeric sealant.

NOTE: Expansion joint replacement is outside the scope of this guide. Refer to The NRCA Roofing Manual:

Membrane Roof Systems for expansion joint details.

2 Where an expansion joint cover is damaged or splice is split or detached, pull it back and remove completely or pull it back until a strong bond is reached and cut off the loose material. Check for debris; remove where present.

3 Scrub the repair area (bellows and sheet metal) with a residue-free cleaner and water. Dirt must be removed from the area to be patched. Ensure the cleaned area extends a minimum of 6 inches beyond the existing splice or damaged area.

Rinse thoroughly with clean water and allow the joint cover to dry. Absorbent, lint-free cloths may be used to facilitate drying.

4 Thoroughly stir EPDM membrane primer and apply the primer to the joint cover repair area (bellows and sheet metal) with a brush, scrubbing pad or lint-free rag. Prime an area that extends approximately 4 inches to either side of a cut or split. Allow the primer to dry as recommended by the manufacturer.

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5 Cut a patch from self-adhering uncured EPDM flashing sheet. Size the patch to extend 3 inches beyond the cut or split or existing splice material.

Round the corners with scissors to prevent peeling of square corners.

6 Peel back the release paper on the back of the patch. Adhere it to primed metal on one side of the bellows. Carefully work the patch into the metal-to-bellows transition: push down on bellows material and press down on the patch to force it to follow the contours of the transition; use a plastic scraper to work the patch into tight spaces. Repeat on the opposite side. Smooth the patch into place as it is applied, taking care to avoid wrinkles.

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7 Roll the patch in all directions with a hand roller to ensure proper adhesion. Pay close attention to rolling the transition between metal and bellows section.

8 Apply EPDM lap sealant around the perimeter of the patch.

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Project Name Project Address Project City, State ZIP Project Description (If Needed)

BUR_####_075113_Steel/Concrete/Wood (Rev. MONTH-2021)

The information provided here is subject to the disclaimer on the first page of this specification. Page 075113-1 of 19

Johns Manville is providing this draft specification to the user as a courtesy to consider in their determination of the optimal system specification for their project's specific needs. By receiving and considering the general information provided herein, the user agrees Johns Manville makes no warranty or representation regarding its contents, and it will not be relied upon as a substitute for professional engineering, design and/or documentation required by building code, contract, or applicable law. The general information in this draft specification must be reviewed/approved by a project designer before finalization and use. The user/recipient of this general information assumes sole responsibility for its use. Additional information, such as Data Sheets, SDS, Application Guides and other literature on the Johns Manville products identified in this draft specification, can be found at https://www.jm.com/en/commercial-roofing/.

This master specifications should be tailored for specific projects. Removing unneeded sections based on project type, deck type, warranty requirements, included components, application methods and other project requirements should be carefully considered. For further help, please contact JM Roofing Specifier Services.

SECTION 075113

BUILT-UP ASPHALT ROOFING (BUR)

PART 1 - GENERAL

1.1 SECTION INCLUDES

A. Built-up asphalt roofing system.

B. Cover board.

C. Roof insulation.

D. Vapor retarder.

E. Base sheet.

F. Sheathing paper.

G. Substrate board.

1.2 RELATED SECTIONS

A. Division 03 Section “Concrete” for concrete.

B. Division 05 Section "Steel Decking" for steel roof deck.

C. Division 06 Section "Miscellaneous Rough Carpentry" for wood nailers, cants, curbs, and blocking [and for wood-based, structural-use roof deck panels].

https://www.jm.com/en/commercial-roofing/

Project City, State ZIP Project Description (If Needed)

The information provided here is subject to the disclaimer on the first page of this specification. Page 075113-2 of 19

D. Division 07 Section "Sheet Metal Flashing and Trim" for flashings and counter flashings.

E. Division 22 Section "Storm Drainage Piping Specialties" for roof drains.

1.3 REFERENCES

A. Roofing Terminology: Refer to the following publications for definitions of roofing work related terms in this Section:

1. ASTM D 1079 “Standard Terminology Relating to Roofing and Waterproofing.”

2. Glossary of NRCA’s “The NRCA Roofing and Waterproofing Manual.”

3. Roof Consultants Institute “Glossary of Building Envelope Terms.”

B. Sheet Metal Terminology and Techniques: SMACNA “Architectural Sheet Metal Manual.”

1.4 DESIGN CRITERIA

A. General: Installed roofing membrane system shall remain watertight; and resist specified wind uplift pressures, thermally induced movement, and exposure to weather without failure.

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

C. Installer shall comply with current code requirements based on authority having jurisdiction.

D. Wind Uplift Performance: Roofing system shall meet the intent of systems that have been successfully tested by a qualified testing and inspecting agency to resist wind uplift pressure calculated in accordance with ASCE 7.

E. 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 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] [B] [C]; UL 790, for application and roof slopes indicated.

1.5 SUBMITTALS

A. Product Data: Manufacturer’s data sheets for each product to be provided.

B. Detail Drawings: Provide roofing system details and details of attachment to other work, including:

1. Base flashings and membrane terminations.

2. Tapered insulation, including slopes.

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

4. Insulation fastening and adhesive patterns.

Project City, State ZIP Project Description (If Needed)

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C. Verification Samples: Provide for each product specified.

D. Installer Certificates: Confirmation that Installer is approved, authorized, or licensed by manufacturer to install roofing system.

E. Maintenance Data: Refer to Johns Manville’s latest published documents on www.JM.com.

F. Guarantees: Provide manufacturer’s current guarantee specimen.

G. Prior to roofing system installation, roofing sub-contractor shall provide a copy of the Guarantee Application Confirmation document issued by Johns Manville Roofing Systems indicating that the project has been reviewed for eligibility to receive the specified guarantee and registered.

1.6 QUALITY ASSURANCE

A. Installer Qualifications: Qualified firm that is approved, authorized, or licensed by roofing system manufacturer to install manufacturer's product who is eligible to receive the specified manufacturer's guarantee.

A. Manufacturer Qualifications: Qualified domestic U.S. owned and based manufacturer that has [UL listing] or accredited testing agency listing for roofing system identical to that used for this Project.

B. Testing Agency Qualifications: An independent testing agency with the experience and capability to conduct the testing indicated, as documented according to ASTM E 329.

C. Test Reports:

1. Roof drain and leader test or submit plumber’s verification.

2. Core cut, if required.

3. Roof deck fastener pullout test, if required.

D. Moisture Survey, if required:

1. Submit prior to installation, results of a non-destructive moisture test of roof system completed by approved third party. Utilize one of the approved methods:

a. Infrared Thermography

b. Nuclear Backscatter

E. Source Limitations: Obtain all components from the single source roofing manufacturer guaranteeing the roofing system. All products used in the system shall be labeled by the single source roofing manufacturer issuing the guarantee.

F. Provide evidence of CERTA training for any installer of torch-applied modified bitumen membrane. Copies of certifications are required prior to award and shall be maintained on the jobsite for inspection at any time.

Project City, State ZIP Project Description (If Needed)

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1.7 DELIVERY, STORAGE, AND HANDLING

A. Deliver roofing materials 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.

C. Protect roof insulation materials from physical damage and from deterioration by sunlight, moisture, soiling, and other sources. 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.

1.8 PROJECT CONDITIONS

A. Weather Limitations: Proceed with installation only when current and forecasted weather conditions permit roofing system to be installed in accordance with manufacturer's written instructions and guarantee requirements.

1.9 GUARANTEE

A. Provide manufacturer's system guarantee equal to Johns Manville's Peak Advantage No Dollar Limit Roofing System Guarantee.

1. Single-source special guarantee includes roofing plies, base flashings, liquid applied flashing, roofing membrane accessories, [roofing membrane], [roof insulation], [fasteners], [adhesives], [cover board], [substrate board], [vapor retarder], [base sheet] [walkway products], [manufacturer’s expansion joints], [manufacturer’s edge metal products], and other approved single-source components of roofing system marketed by the manufacturer.

2. Guarantee Period: [10] [15] [20] years from date of Substantial Completion.

3. Contractor is required to list “INSERT FIRM NAME” as the Specifier/Consultant of record in the appropriate fields (“Specifier Account”) when applying for the manufacturer’s warranty.

B. Installer’s Guarantee: Submit roofing Installer's guarantee, signed by Installer, covering work of this Section, including all components of roofing system, for the following guarantee period:

1. Guarantee Period: [Two] [Five] years from date of Substantial Completion.

C. Existing Guarantees: Guarantees on existing building elements should not be affected by scope of work.

1. Installer is responsible for coordinating with building owner’s representative to verify compliance.

Project City, State ZIP Project Description (If Needed)

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PART 2 - PRODUCTS

2.1 ROOFING MEMBRANE FELTS

A. Glass-Fiber Base Sheet: [ASTM D 4897, Type II, asphalt coated, fiberglass venting base sheet] [ASTM D 4601, Type II, asphalt coated, fiberglass base felt]. Basis of design: [Ventsulation Felt] [PermaPly 28] [GlasBase Plus] [GlasTite Flexible]

B. Glass-Fiber Felts: ASTM D 2178, Type [IV] [VI], asphalt-impregnated, glass-fiber felt. Basis of design:

[GlasPly IV] [GlasPly Premier]

2.2 ROOFING MEMBRANE CAPSHEET

A. Cap Sheet: ASTM D 3909, asphalt-impregnated and -coated, glass-fiber cap sheet, with white [reflective] coarse mineral-granule top surfacing and fine mineral surfacing on bottom surface. Basis of design:

[GlasKap] [GlasKap Plus] [GlasKap CR G]

2.3 FLASHING MATERIALS

A. Backer Sheet: ASTM D 2178, Type [IV] [VI], asphalt-impregnated, glass-fiber felt. Basis of design:

[GlasPly IV] [GlasPly Premier]

B. Backer Sheet: ASTM D 4601, Type II, asphalt-impregnated and -coated, glass-fiber sheet, dusted with fine mineral surfacing on both sides. Basis of design: [PermaPly 28] [GlasBase Plus]

C. Backer Sheet: ASTM D 4601, Type II, asphalt-impregnated and -coated composite sheet; smooth surfaced and reinforced with a composite polyester and glass-fiber core. Basis of design: GlasTite Flexible

D. Backer Sheet: [ASTM D 6164, Grade S, Type I, polyester-reinforced] [ASTM D 6163, Grade S, Type I, glass-fiber-reinforced] [ASTM D 6162, Grade S, Type II, composite polyester- and glass-fiber-reinforced], SBS-modified asphalt sheet; smooth surfaced; suitable for application method specified. Basis of design:

[DynaLastic 180 S] [DynaBase] [DynaPly T1]

E. Flashing Sheet: [ASTM D 6164, Grade G, Type II, polyester-reinforced] [ASTM D 6163, Grade G, Type I, glass-fiber-reinforced] [ASTM D 6221, Grade G, Type I, composite polyester- and glass-fiber-reinforced] [ASTM D 6298, embossed aluminum foil surfaced, glass-fiber-reinforce], SBS-modified asphalt sheet;

granular surfaced; suitable for application method specified. Basis of design: [DynaLastic 250 FR] [DynaLastic 250 FR CR G] [DynaFlex] [DynaFlex CR G] [DynaClad] [DynaKap]

F. Liquid Applied Flashing: A liquid and fabric reinforced flashing system created with a stitch bonded polyester scrim and a two-component, moisture cured, elastomeric, liquid applied flashing material, consisting of an asphalt extended urethane base material and an activator. Basis of design: PermaFlash

System

G. High Wall Sheet Flashing Membrane: Basis of Design:

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1. JM PVC: 60 mils, nominal; internally or scrim reinforced

2. JM TPO: 60 mils, internally or scrim reinforced

3. JM EPDM: 60 mils, [non-reinforced] [internally or scrim reinforced]

4. Adhesive Basis of Design: [JM Membrane Bonding Adhesive (TPO & EPDM)] [JM PVC

Membrane Adhesive Low VOC] [All Season Sprayable Bonding Adhesive (TPO & EPDM)]

2.4 AUXILIARY ROOFING MEMBRANE MATERIALS

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

B. Roofing Asphalt: ASTM D 312-15, Type IV.

C. Asphalt Primer: ASTM D 41. Basis of design: JM Asphalt Primer

D. Asphalt Roofing Cement: ASTM D 4586, asbestos free, general purpose mastic as required by roofing system manufacturer for application. Basis of design: MBR Utility Cement

E. Cold-Applied Flashing Adhesive: Roofing system manufacturer's asphalt-based, one-part, trowel-grade mastic, cold-applied adhesive specially formulated for compatibility and use with flashing applications.

Basis of design: MBR Utility Cement

F. Cold-Applied Flashing Adhesive: Roofing system manufacturer's asphalt-based, two-part, elastomeric, liquid-applied, cold-applied adhesive specially formulated for compatibility and use with flashing applications. Basis of design: MBR Flashing Cement

G. Mastic Sealant: As required by Johns Manville.

H. Roofing Granules: Ceramic-coated roofing granules matching specified cap sheet, provided by roofing system manufacturer. [Roofing Granules] [CR Roofing Granules]

I. Aggregate Surfacing: ASTM D 1863, No. 6 or No. 67, clean, dry, opaque, [water-worn gravel or crushed stone, free of sharp edges] [crushed slag, free of sharp edges].

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

2.5 REFLECTIVE AND PROTECTIVE COATING

A. Elastomeric Coating: ASTM D 6083. A multipurpose, acrylic elastomeric coating for use over a variety of substrates. Basis of design: [TopGard 4000] [TopGard 5000]

B. Base Coat: One-part acrylic elastomeric, with bleed-blocking properties for coating over asphalt surfaces.

Basis of design: TopGard Base Coat

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2.6 WALKWAYS

A. Walkway Pads: Mineral-granule-surfaced, reinforced modified asphalt composition, slip-resisting pads, manufactured as a traffic pad for foot traffic provided by roofing system manufacturer, with a pad size of 32-inch x 32 inch. Basis of design: [DynaTred Walkway]

2.7 COVER BOARD

A. Perlite Board: ASTM C 728, Type [1] [2] [3]; composed of expanded perlite, cellulosic fibers, binders and waterproofing agents with top surface seal-coated. Basis of design: [1/2” Retro-Fit Board] [3/4” Fesco Board] [1” Fesco Board] [RetroPlus Roof Board]

B. Gypsum Board: ASTM C 1177, Heavy duty coated glass-mat facer [with Eonic primed face], water-resistant gypsum substrate for adhered roof applications, [1/4 inch (6 mm)] [1/2 inch (13 mm)] [5/8 inch (16 mm)] thick. Basis of design: [DEXcell FA Glass Mat Roof Board] [Dens Deck Prime Roof Board]

C. Gypsum Fiber Board: ASTM C 1278, non-faced, gypsum and cellulose fiber substrate, [1/4 inch (6 mm)] [3/8 inch (9.5 mm)] [1/2 inch (13 mm)] [5/8 inch (16 mm)] thick. Basis of design: Securock Gypsum- Fiber Roof Board

2.8 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. Polyisocyanurate Board Insulation: ASTM C 1289, Type II, Class [1] [2], Grade [2 (20 psi)] [3 (25 psi)], Basis of design: [ENRGY 3] [ENRGY 3 25 PSI] [ENRGY 3 CGF] [ENRGY 3 25 PSI CGF]

1. Provide insulation package with minimum R Value: [insert R Value] [minimum required by applicable code].

2. Provide insulation package with minimum thickness: [insert thickness].

3. Provide insulation package in multiple layers.

4. Minimum Long-Term Thermal Resistance (LTTR): 5.7 per inch.

a. Determined in accordance with CAN/ULC S770 at 75ºF (24ºC)

2.9 TAPERED INSULATION

A. Tapered Insulation: ASTM C 1289, Type II, Class [1] [2] [3], Grade [2 (20 psi)] [3 (25 psi)], provide factory-tapered insulation boards fabricated to slope of [1/4 inch per 12 inches (1:48)], unless otherwise indicated. Basis of design: [Tapered ENRGY 3] [Tapered ENRGY 3 25 PSI] [Tapered ENRGY 3 CGF] [Tapered ENRGY 3 25 PSI CGF]

2.10 INSULATION ACCESSORIES

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

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B. Provide saddles, crickets, tapered edge strips, and other insulation shapes, where indicated for sloping to drain. Fabricate to slopes indicated. Basis of design: Tapered Fesco Edge Strip

C. Fasteners: Factory-coated steel fasteners and metal plates meeting corrosion-resistance provisions in FMG 4470, designed for fastening roof insulation to substrate, and furnished by roofing system manufacturer. Basis of design: [UltraFast Fasteners and UltraFast Plates] [All Purpose Fasteners and UltraFast Plates] [Lite-Deck Fasteners and Plates]

D. Polymer Fasteners: Glass-reinforced nylon fasteners with ¼" square drive and 1” head with Galvalume®*-coated 3” metal stress plates, designed to lock into the fastener head. Fasteners designed for fastening roof insulation to substrate and furnished by roofing system manufacturer. Basis of design: Polymer Auger Fasteners and Plates

E. Urethane Adhesive: Manufacturer’s two component polyurethane adhesive formulated to adhere insulation to substrate. Basis of design: [JM Two-Part Urethane Insulation Adhesive (UIA)] [JM One- Step Foamable Adhesive] [Roofing Systems Urethane Adhesive (RSUA)] [JM Two-Part Urethane Insulation Adhesive Canister]

F. Insulation Cant Strips: ASTM C 728, perlite insulation board. Basis of design: FesCant Plus

G. Wood Nailer Strips: Comply with requirements in Division 06 Section "Miscellaneous Rough Carpentry."

2.11 VAPOR RETARDER

A. Glass-Fiber Felts: ASTM D 2178, Type IV, asphalt-impregnated, glass-fiber felt. Basis of design: GlasPly

IV.

B. Torch Applied SBS Vapor Retarder: [ASTM D 6163, Grade S, Type I, glass-fiber-reinforced] [ASTM D 6164, Grade S, Type I, polyester-reinforced], SBS-modified asphalt sheet; smooth surfaced;

suitable for application method specified. Basis of design: [DynaWeld Base] [DynaBase HW] [DynaWeld 180 S].

C. Self-Adhered SBS Vapor Retarder: [ASTM D 4601, glass-fiber-reinforced], SBS-modified asphalt sheet;

sand surfaced; suitable for application method specified. Basis of design: DynaGrip Base SD/SA.

D. Asphalt Primer: ASTM D 41. Basis of design: JM Asphalt Primer

E. Self-Adhered SBS Vapor Retarder: Tri-laminate woven polyethylene, nonslip UV protected top surface;

suitable for application method specified. Basis of design: [JM Vapor Barrier SAR].

F. Self-Adhered Primer: [One-part] [low VOC aerosol] penetrating primer solution to enhance the adhesion of self-adhering membranes. [SA Primer] [SA Primer Low VOC] [JM All Season Sprayable Bonding Adhesive].

G. Polyethylene Vapor Retarder: ASTM D 4397, [6 mils (0.15 mm)] [10 mils (0.25 mm)] thick, minimum, with maximum permeance rating of 0.13 perm (7.5 ng/Pa x s x sq. m).

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2.12 BASE-SHEET MATERIALS

A. Base Sheet: ASTM D 4601, Type II non-perforated, asphalt-impregnated and -coated, glass-fiber sheet, dusted with fine mineral surfacing on both sides. Basis of design: [PermaPly 28] [GlasBase Plus]

B. Base Sheet: ASTM D 4897, Type II, venting, non-perforated, heavyweight, asphalt-impregnated and -coated, glass-fiber base sheet with coarse granular surfacing or embossed venting channels on bottom surface. Basis of design: Ventsulation Felt

C. Composite Base Sheet: Roofing system manufacturer's asphalt-impregnated and -coated composite sheet; smooth surfaced and reinforced with a composite polyester and glass-fiber core. Basis of design:

GlasTite Flexible

D. Base-Sheet Fasteners: Twin legged, factory-coated steel fasteners and Galvalume metal plates meeting corrosion-resistance provisions in FMG 4470, designed for fastening base-sheet to substrate, tested by manufacturer for required pullout strength, and provided by the roofing system manufacturer. Product:

Lightweight Concrete (LWC) Base Sheet Fasteners

E. Base-Sheet Fasteners: Tube, disk and locking staple design, factory-coated steel fasteners and Galvalume metal battens meeting corrosion-resistance provisions in FMG 4470, designed for fastening base-sheet to substrate, tested by manufacturer for required pullout strength, and provided by the roofing system manufacturer. Product: UltraLok Locking Impact Fastener

F. Base Sheet Fasteners: 32 gauge, 1-5/8” diameter tin caps with 11-gauge annular ring shank nails.

2.13 SUBSTRATE BOARD

A. Gypsum Board: ASTM C 1177, coated glass-mat facer, water-resistant gypsum substrate for mechanically attached roof applications, [1/4 inch (6 mm)] [1/2 inch (13 mm)] [5/8 inch (16 mm)] thick.

Basis of design: [Securock Ultralight Glass-Mat Roof Board] [DEXcell Glass Mat Roof Board] [Dens Deck Roof Board]

B. Gypsum Board: ASTM C 1177, Heavy duty coated glass-mat facer, water-resistant gypsum substrate for adhered roof applications, [1/4 inch (6 mm)] [1/2 inch (13 mm)] [5/8 inch (16 mm)] thick. Basis of design: [DEXcell FA Glass Mat Roof Board] [Dens Deck Prime Roof Board]

C. Gypsum Fiber Board: ASTM C 1278, non-faced, gypsum and cellulose fiber substrate, [1/4 inch (6 mm)] [3/8 inch (9.5 mm)] [1/2 inch (13 mm)] [5/8 inch (16 mm)] thick. Basis of design: Securock Gypsum- Fiber Roof Board

D. High-Density Polyisocyanurate: ASTM C 1289, Type II, Class 4, Grade 1, High-density Polyisocyanurate technology bonded in-line to inorganic coated glass facers with greater than 80 lbs of compressive strength. Basis of design: ProtectoR HD

1. Thickness: 1/2 inch (13 mm)

2. R-value: 2.5

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2.14 SHEATHING PAPER

A. Sheathing Paper: Red-rosin type, minimum 3 lb/100 sq. ft. (0.16 kg/sq. m).

2.15 EDGE METAL COMPONENTS

A. Expansion Joints: Provide factory fabricated weatherproof, exterior covers for expansion joint openings consisting of flexible rubber membrane, supported by a closed cell foam to form flexible bellows, with two metal flanges, adhesively and mechanically combined to the bellows by a bifurcation process. Provide product from single-source roofing system supplier that is included in the No Dollar Limit guarantee. Basis of design: [Expand-O-Flash] [Expand-O-Gard]

B. Coping System: Manufacturer’s factory fabricated coping consisting of a base piece and a snap-on cap.

Provide product from single-source roofing system supplier that is included in the No Dollar Limit guarantee. Basis of design: [Presto-Lock Coping] [Presto-Lock Gold Coping]

C. Fascia System: Manufacturer’s factory fabricated fascia consisting of a base piece and a snap-on cover.

Provide product from single-source roofing system supplier that is included in the No Dollar Limit guarantee. Basis of design: [Presto-Tite Fascia]

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine substrates, areas, and conditions for compliance with the requirements affecting performance of roofing system.

1. General:

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

b. 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.

2. Steel Decks:

a. Verify that surface plane flatness and fastening of steel roof deck complies with requirements in Division 05 Section "Steel Decking."

b. Verify that decking is visibly dry and free of moisture.

c. Verify that the decking is smooth and free of large cracks, holes or sharp changes in elevation of the surface.

d. When applicable perform pull test with the specific fastener being used on the project to confirm the fastener resistance meets the requirements for that particular system.

3. Concrete Decks:

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a. Verify that concrete curing compounds that will impair adhesion of roofing components to roof deck have been removed.

b. Verify that concrete substrate is visibly dry and free of moisture.

4. Wood Decks:

a. Verify that wood decking is visibly dry and free of moisture.

b. Verify that wood has ability to provide minimum fastener pull-out resistance.

5. Cementitious Wood Fiber Decks (Tectum):

a. Verify that cementitious wood fiber substrate is visibly dry and free of moisture.

b. Verify that cementitious wood fiber has ability to provide minimum base sheet fastener pull-out resistance.

c. Provide documentation of adhesion resistance values in accordance with ANSI/SPRI

1A-1 2015.

6. Lightweight Insulating Concrete:

a. Verify that lightweight insulating concrete substrate is visibly dry and free of moisture according to the lightweight insulating concrete manufacturer’s approved method.

b. Verify that lightweight insulating concrete has ability to provide minimum base sheet fastener pull-out resistance.

c. Provide documentation of adhesion resistance values in accordance with ANSI/SPRI 1A-1 2015.

7. Gypsum Deck:

a. Verify that gypsum is visibly dry, free of moisture, and that there are no signs of staining.

b. Inspect deck for cracking and deflection of bulb tees.

c. Verify that gypsum has ability to provide minimum fastener pull-out resistance.

8. Ensure general rigidity and proper slope for drainage.

9. Verify that deck is securely fastened with no projecting fasteners and with no adjacent units more than 1/16 inch (1.6 mm) out of plane relative to adjoining deck.

B. Unacceptable panels should be brought to the attention of the General Contractor and Project Owner’s Representative and shall be corrected prior to installation of roofing system.

3.2 PREPARATION

A. Clean and remove from substrate sharp projections, dust, debris, moisture, and other substances detrimental to roofing installation in accordance with roofing system manufacturer's written instructions.

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B. Prevent materials from entering and clogging roof drains and conductors and from spilling or migrating onto surfaces of other construction.

C. If applicable, prime surface of deck with primer at a rate recommended by roofing manufacturer and allow primer to dry.

D. Proceed with each step of installation only after unsatisfactory conditions have been corrected.

3.3 RE-ROOF PREPARATION

A. Remove all roofing membrane, surfacing, coverboards, insulation, fasteners, asphalt, pitch, adhesives, etc.

1. Remove an area no larger than can be re-roofed in one day.

B. Tear out all base flashings, counterflashings, pitch pans, pipe flashings, vents, sumps and like components necessary for application of new membrane.

C. Remove abandoned equipment curbs, skylights, smoke hatches, and penetrations.

1. Install decking to match existing as directed by Owner's Representative.

D. Raise (disconnect by licensed craftsmen, if necessary) all HVAC units and other equipment supported by curbs to conform with the following:

1. Modify curbs as required to provide a minimum 8" base flashing height measured from the surface of the new membrane to the top of the flashing membrane.

2. Secure of flashing and install new metal counterflashing prior to re-installation of unit.

3. Perimeter nailers shall be elevated to match elevation of new roof insulation.

E. Immediately remove all debris from roof surface. Demolished roof system may not be stored on the roof surface.

3.4 RE-COVER PREPARATION

A. Prepare existing roof according to roofing system manufacturer's written instructions, applicable recommendations of the roofing manufacturer, and requirements in this Section.

B. Tear out all base flashings, counterflashings, pitch pans, pipe flashings, vents, sumps and like components necessary for application of new membrane.

C. Disable existing roof membrane per manufacturer’s written instruction.

D. Remove existing membrane per manufacturer’s written instructions.

E. Remove and replace wet, deteriorated or damaged roof insulation and decking as identified in moisture survey.

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F. Remove abandoned equipment curbs, skylights, smoke hatches, and penetrations. Install decking to match existing as directed by Owner's Representative.

G. Raise, (disconnect by licensed craftsmen, if necessary) all HVAC units and other equipment supported by curbs to conform with the following:

1. Modify curbs as required to provide a minimum 8-inch base flashing height measured from the surface of the new membrane to the top of the flashing membrane.

2. Secure top of flashing and install new metal counterflashing prior to re-installation of unit.

3.…