SECTION 07514

BUILT-UP ASPHALT ROOFING

PART	GENERAL

SECTION INCLUDES

[Sheathing over metal deck surface.]

[Vapor retarder placed over structural deck surface,] insulation, membrane roofing, [gravel] [protective coating], base flashings, roofing membrane, expansion joints [and cant strips].

PRODUCTS FURNISHED BUT NOT INSTALLED UNDER THIS SECTION

Section [_____-__________]: Placement of [recessed] strip reglet devices.

PRODUCTS INSTALLED BUT NOT FURNISHED UNDER THIS SECTION

Section 05311 - Steel Roof Deck: Supply of acoustical insulation for deck flutes.

Section [______-____________]: [Flashing devices] [Special coated metal counter flashings] [________].

RELATED SECTIONS

Section [______-____________]: Roof deck surface.

Section 06114 - Wood Blocking and Curbing: Wood nailers [and cant strips].

[Section 07565 - Preparation for Re-Roofing.]

Section 07620 - Sheet Metal Flashing and Trim: Counter flashing and [________].

Section 07710 - Prefabricated Roof Specialties: Counter flashings and [________].

Section 07724 - Roof Hatches: Counter flashings and [________].

Section 07810 - Plastic Skylights: Skylight frame, [integral curb,] [counter flashing,] and [________].

Section 08952 - Translucent Panel System: Counter flashings and [________].

Section 08960 - Sloped Glazing: Counter flashings and [________].

Section 15430 - Plumbing Specialties: Roof [drains] [sumps] [hoppers] [________].

Section [______-____________]: Flashing collars.

Section [______-____________]: Prefabricated curb for mechanical equipment.

Section [_____-__________]: Lightning protection.

REFERENCES

ASTM C79 - Test Method for Gypsum Sheathing Board.

ASTM C177 - Test Method for Steady-State Thermal Transmission Properties by Means of the Guarded Hot Plate.

ASTM C208 - Insulating Board (Cellulosic Fiber), Structural and Decorative.

ASTM C552 - Cellular Glass Block and Pipe Thermal Insulation.

ASTM C578 - Preformed, Cellular Polystyrene Thermal Insulation.

ASTM C612 - Mineral Fiber Block and Board Thermal Insulation.

ASTM C726 - Mineral Fiber and Mineral Fiber, Rigid Cellular Polyurethane Composite Roof Insulation Board.

ASTM C728 - Perlite Thermal Insulation Board.

ASTM C984 - Perlite Board, Rigid Cellular Polyurethane Composite Roof Insulation.

ASTM C1013 - Membrane Faced Rigid Cellular Polyurethane Roof Insulation.

ASTM C1050 - Rigid Cellular Polystyrene Cellulosic Fiber Composite Roof Insulation.

ASTM D41 - Asphalt Primer Used in Roofing, Dampproofing, and Waterproofing.

ASTM D226 - Asphalt-Saturated Organic Felt Used in Roofing and Waterproofing.

ASTM D249 - Asphalt Roll Roofing (Organic Felt) Surfaced with Mineral Granules.

ASTM D312 - Asphalt Used in Roofing.

ASTM D549 - Test Methods for Rosin in Paper and Paperboard.

ASTM D1227 - Emulsified Asphalt Used as a Protective Coating for Roofing.

ASTM D1863 - Mineral Aggregate for Use on Built-Up Roofs.

ASTM D2178 - Asphalt Glass Felt Used in Roofing and Waterproofing.

ASTM D2626 - Asphalt-Saturated and Coated Organic Felt Base Sheet Used in Roofing.

ASTM D2822 - Asphalt Roof Cement.

ASTM D3672 - Venting Asphalt-Saturated and Coated Inorganic Felt Base Sheet Used in Roofing.

ASTM D3909 - Asphalt Roll Roofing (Glass Felt) Surfaced with Mineral Granules.

ASTM E96 - Water Vapor Transmission of Materials.

FM (Factory Mutual) - Roof Assembly Classifications.

NRCA (National Roofing Contractors Association) - Roofing and Waterproofing Manual.

UL (Underwriters Laboratories, Inc.) - Fire Hazard Classifications.

SYSTEM DESCRIPTION

Built-up Roofing System: [Three] [Four] ply asphalt membrane system with [vapor retarder,] insulation, and [aggregate surfacing] [aluminized coated] [emulsion coated] finish.

NRCA Specification Plate: [________].

SUBMITTALS

Submit under provisions of Section [01300.] [________.]

Shop Drawings: Indicate [setting plan for tapered insulation,] [mechanical fastener layout,] [joint or termination detail conditions,] [conditions of interface with other materials] [and] [________].

Product Data: Provide data indicating membrane and bitumen materials, base flashing materials, insulation, [vapor retarder,] [, protective covering] [and] [________].

Submit [two] [____] samples [____x____] inches ([____x____] mm) in size illustrating [insulation] [, colored coating] [and] [________].

Submit [two] [____] sample [1] [____] lb ([0.5] [____] kg) containers of roofing aggregate.

Manufacturer's Installation Instructions: Indicate special procedures, perimeter conditions requiring special attention, and [________].

Manufacturer's Certificate: Certify that [Products] [________] meet or exceed [specified requirements] [________].

Manufacturer's Field Reports: Submit under provisions of Section [01400] [________]:

Indicate procedures followed; ambient temperatures, humidity, wind velocity during application, supplementary instructions given, [and] [________].

QUALITY ASSURANCE

Perform Work in accordance with [NRCA Roofing and Waterproofing Manual.] [manufacturer's instructions.]

Maintain [one copy] [[____] copies] of [each] document on site.

QUALIFICATIONS

Manufacturer: Company specializing in manufacturing the Products specified in this section with minimum [five] [_______] years [documented] experience.

Applicator: Company specializing in performing the work of this section [with minimum [three] [____] years [documented] experience] [, approved by manufacturer].

REGULATORY REQUIREMENTS

Conform to [applicable] [__________] code for roof assembly fire hazard requirements.

Fire Resistance Rating: [Roof] [Floor] assembly rating of [________] in accordance with [UL Design No. [____].] [____.]

UL: Class [A] [B] [C] Fire Hazard Classification.

FM: Roof Assembly Classification, wind uplift requirement of [I60] [I90], in accordance with FM Construction Bulletin 1-28.

PRE-INSTALLATION CONFERENCE

Convene [one] [_____] week prior to commencing work of this section, under provisions of Section [01039.] [________.]

Review preparation and installation procedures and coordinating and scheduling required with related work.

DELIVERY, STORAGE, AND HANDLING

Deliver, store, protect and handle products to site under provisions of Section [01600.] [________.]

Deliver products in manufacturer's original containers, dry, undamaged, with seals and labels intact.

Store products in weather protected environment, clear of ground and moisture.

[Protect foam insulation from direct exposure to sunlight.]

ENVIRONMENTAL REQUIREMENTS

Do not apply roofing membrane during unsuitable weather [when ambient temperature is below [40] [____] degrees F ([5] [____] degrees C) or above [____] degrees F ([____] degrees C)].

Do not apply roofing membrane to damp or frozen deck surface or when precipitation is occurring.

Do not expose materials vulnerable to water [or sun damage] in quantities greater than can be weatherproofed the same day.

COORDINATION

Coordinate work under provisions of Section [01039.] [________.]

Coordinate the work with installation of associated counter flashings installed by other sections as the work of this section proceeds.

WARRANTY

Provide [two] [____] year [manufacturer's] warranty under provisions of Section [01700.] [________.]

Warranty: Cover damage [to building] resulting from failure to prevent penetration of water.

PART	PRODUCTS

MANUFACTURERS - SHEET AND BITUMEN MATERIALS

[__________________________________] System [_________].

Other acceptable manufacturers offering equivalent products.

[______________________________] System [_________].

[______________________________] System [_________].

[______________________________] System [_________].

Substitutions: Under provisions of Section [01600.] [________.]

SHEET MATERIALS

Asphalt Saturated Organic Felts: ASTM D226, No. [15] [20] [30]; [unperforated.] [perforated.]

****** [OR] ******

Glass Fiber Felts: ASTM D2178, Type [III.] [IV.] [VI.]

Base Sheet: [ASTM D2626, No. [43] [____], plain] [ASTM D3672, No. [____], vented] asphalt saturated and coated inorganic base sheet.

Mineral Surfaced Felts: [ASTM D249 No. 90] [ASTM D3909]; [white] [black] [________] colored mineral granules.

Dry Sheathing Paper: [Clean, white cellulose] [ASTM D549 red rosin] paper, unsaturated.

BITUMINOUS MATERIALS

Asphalt Bitumen: ASTM D312, Type [I.] [II.] [III.] [IV.]

Asphalt Primer: ASTM D41.

Plastic Cement: ASTM D2822 Type [I] [II], cutback asphalt type.

Asphalt Emulsion: ASTM D1227, Type [I.] [II.]

DECK COVERING MATERIALS

Gypsum Sheathing: [ASTM C79,] Fire rated type, paper face, [5/8] [____] inch ([16] [____] mm) thick.

Fire Resistant Sheet Vapor Retarder: [UL] [FM] requirements; [reinforced asphalt/kraft paper laminate,] [non-bituminous foil and fibrous mesh type,] [plastic sheet,] [with vapor permeability value of [____] perms,] including compatible fire retarder adhesive; [________] manufactured by [____________].

INSULATION

Manufacturers:

[_________________________________] Type [________].

[_________________________________] Type [________].

[_________________________________] Type [________].

Insulation: [ASTM C612,] Glass fiber rigid board; top surface coated with 28 lb/square (137 kg/100 sq m) asphalt and kraft paper, with the following characteristics:

Board Size	[____x____] inch ([____x____] mm)

Board Thickness	[____] inch ([____] mm)

Thermal Conductivity	K factor of [0.27] [____](KSI factor of [0.47] [____])

Board Edges	[Square] [________]

****** [OR] ******

Insulation: [ASTM C1013,] Urethane rigid board, both faces finished with [polyethylene] [glass fiber] treated kraft paper, with the following characteristics:

Board Density	[1.8] [____] lb/cu ft ([29] [____] kg/cu m)

Board Size	[____x____] inch ([____x____] mm)

Board Thickness	[____] inch ([____] mm)

Thermal Conductivity	K factor of [____](KSI factor of [____])

Board Edges	[Square] [Channel vented]

****** [OR] ******

Insulation: [ASTM C728,] Expanded perlite mineral aggregate board; with the following characteristics:

Board Density	[10] [____] lb/cu ft ([160] [____] kg/cu m)

Board Size	[____x____] inch ([____x____] mm)

Board Thickness	[____] inch ([____] mm) [Factory tapered thickness]

Thermal Conductivity	K factor of [0.36] [____](KSI factor of [0.62] [____])

Board Edges	[Square] [________]

****** [OR] ******

Insulation: [ASTM C552,] Cellular glass board; with the following characteristics:

Board Density	[10] [____] lb/cu ft ([160] [____] kg/cu m)

Board Size	[____x____] inch ([____x____] mm)

Board Thickness	[[____] inch ([____] mm).] [As required to achieve a [minimum] [nominal] insulation R value of [____] (RSI value of [____]).]

Thermal Conductivity	K factor of [0.36] [____](KSI factor of [0.62] [____])

Board Edges	[Square] [Factory Tapered Thickness] [________]

****** [OR] ******

Insulation: [ASTM C578 Type VI,] Extruded expanded polystyrene board with natural skin surfaces; [drainage channels one face,] [________] manufactured by [________________], with the following characteristics:

Board Density	[1.9] [____] lb/cu ft ([30][____] kg/cu m)

Board Size	[__ x __] inch ([__ x __] mm)

Board Thickness	[____] inches ([____] mm)

Thermal Conductivity	K factor of [0.20] [____] (KSI factor of [0.35] [____]) as determined by ASTM C177.

Board Edges	square.

****** [OR] ******

Insulation: [ASTM C578 Type [____],] Molded expanded polystyrene board; [drainage channels one face,] [________] manufactured by [________________], with the following characteristics:

Board Density	[1] [1.25] [1.5] [2] [____] lb/cu ft ([16] [20] [24] [32] [____] kg/cu m)

Board Size	[__ x __] inch ([__ x __] mm)

Board Thickness	[____] inches ([____] mm)

Thermal Conductivity	K factor of [0.24] [0.23] [0.22] [0.21] [____] (KSI factor of [0.42] [0.40] [0.38] [0.37] [____]) as determined by ASTM C177.

Board Edges	square.

****** [OR] ******

Insulation: [ASTM C208,] Cellulose fiber board, with the following characteristics:

Board Density	[____] lb/cu ft ([____] kg/cu m)

Board Size	[____x____] inch ([____x____] mm)

Board Thickness	[____] inch ([____] mm)

Thermal Conductivity	K factor of [0.36] [____](KSI factor of [0.62] [____])

Board Edges	[Square] [Ship lapped]

****** [OR] ******

Insulation: [ASTM C726,] [ASTM C984,] [ASTM C1050,] Composite fabrication of [sandwich] [two material lamination] of top [and bottom] layer of [________] and [middle] [bottom] layer of [________] factory bonded; with the following characteristics:

Board Density	[____] lb/cu ft ([____] kg/cu m)

Board Size	[____x____] inch ([____x____] mm)

Board Thickness	[____] inch ([____] mm)

Thermal Conductivity	K factor of [____](KSI factor of [____])

Board Edges	[Square] [Channel vented] [________]

FLASHINGS

Flexible Flashings: [EPDM] [Butyl] [Neoprene] [Modified bitumen, SPS type] [________]; [black] [white] color; [________] manufactured by [________________].

****** [OR] ******

Flexible Flashings: [EPDM] [Butyl] [Neoprene] [Modified bitumen, SPS type] [________]; conforming to the following:

Thickness:	[____] mil ([____] mm).

Maximum Perm Rate:	[____].

Tensile Strength:	[1,200] [____] psi ([8.3] [____] Mpa).

Elasticity:	[50] [____] percent with full recovery without set.

Color:	[black] [white] [________].

Manufactured Roof Specialties: As specified in Section [07710.] [________.]

****** [OR] ******

Prefabricated Control [or Expansion] Joint Flashing: Sheet [butyl] [________] over close cell foam backing seamed to metal flanges; [________] manufactured by [_____________].

****** [OR] ******

Control [or Expansion] Joint Flashing: [Sheet [butyl] [________], metal counter flashings and [wood] [________] materials, as detailed.

****** [OR] ******

Control [or Expansion] Joint Flashing: [Sheet [butyl] [________], metal counter flashings and [wood] [________] materials, in accordance with NRCA Construction Details [____], [____] and [____].

ROOF SURFACING

Aggregate: [ASTM D1863;] sound, hard [washed river gravel] [roofer's pea gravel] [white dolomite chips] [crushed shale] [stone]; [____] inch ([____] mm) minimum to [____] inch ([____] mm) maximum size.

****** [OR] ******

Aluminum Coating: Aluminized liquid; [________] manufactured by [____________].

****** [OR] ******

Emulsion Coating: Fibered, liquid; [________] manufactured by [____________].

Walkway Pads: [Asphalt impregnated mineral boards with granular surfaces] [________], [____] inch ([____] mm) size, [________] finish; [________] manufactured by [____________].

CANTS

Fiber Cant and Tapered Edge Strips: Asphalt impregnated wood fiberboard, preformed to [45 degree angle.] [tapered edge strip.] [configuration as detailed.]

****** [OR] ******

Wood Cant Strip: Specified in Section [06114] [________], [pressure] preservative treated.

ACCESSORIES

Sheathing Adhesive: Non-combustible type, for adhering gypsum sheathing to metal deck.

Sheathing Joint Tape: [Paper] [Heat resistant] [________] type, [____] inch ([____] mm) wide, self adhering.

Insulation Joint Tape: Asphalt treated glass fiber reinforced; [6] [____] inches ([150] [____] mm) wide; self adhering.

Insulation Fasteners: Appropriate for purpose intended and approved by [Factory Mutual and] system manufacturer]; length required for thickness of insulation material and penetration of deck substrate, [with metal washers]; [________] manufactured by [________________].

Roofing Nails: [Galvanized, hot dipped] [Non-ferrous] type, size and configuration as required to suit application.

Roof Insulation Vents: [Aluminum] [Copper] [Plastic] [Galvanized steel], [with perforated inner tube]; protective cap and mounting flange; [________] manufactured by [____________].

PART	EXECUTION

EXAMINATION

Verify that surfaces and site conditions are ready to receive work.

Verify deck is supported and secure.

Verify deck is clean and smooth, flat, free of depressions, waves, or projections, properly sloped to [drains] [valleys,] [or] [eaves], and suitable for installation of roof system.

Verify deck surfaces are dry and free of snow or ice.

Confirm dry deck by moisture meter with [12] [____] percent moisture maximum.

Verify adjacent precast concrete roof members do not vary more than 1/4 inch (6 mm) in height. Verify grout keys are filled flush.

****** [OR] ******

Verify adjacent plywood sheets do not vary more than 1/4 inch (6 mm) in height.

Verify roof openings, curbs, and penetrations through roof are solidly set, and [wood cant strips] [wood nailing strips] [and reglets] are in place.

PREPARATION AND VAPOR RETARDER APPLICATION - WOOD DECK

Verify flatness and tight joints of wood decking. [Seal joints of plywood with tape if a hot bitumen application is to follow.] Fill knot holes with latex filler.

Lay one ply of dry sheathing paper; lap edges 2 inches (50 mm).

Lay asphalt coated base sheet; lap edges 4 inches (100 mm). Nail laps 6 inches (150 mm) oc. Nail the field area at 12 inches (300 mm) oc staggered.

****** [OR] ******

Lay two plies of roof felt; lap plies 19 inches (480 mm) and nail at 12 inches (300 mm) oc along seams.

Mop surface with hot bitumen and embed [two plies] [one ply] of roof felt; lap plies 19 inches (480 mm), full mop each ply. Apply bitumen at [20] [_____] lb/square ([98] [_____] kg/100 sq m).

Extend vapor retardant under cant strips and blocking.

Install flexible flashings from vapor retardant to air seal material of wall construction, lap and seal to provide continuity of the air barrier plane.

Glaze top surface of the vapor retarder if insulation is not placed immediately.

****** [OR] ******

PREPARATION AND VAPOR RETARDER APPLICATION - CONCRETE DECK

Fill surface honeycomb and variations with latex filler.

Apply primer at a rate of [1] [____] gal/square ([4.5] [____] L/10 sq m) and allow to dry.

Mop surface with hot bitumen and embed two plies of roof felt, full mop each ply; lap plies 19 inches (480 mm); apply bitumen at a rate of [20] [_____] lb/square ([98] [_____] kg/100 sq m).

Lap [flexible flashings] over air seal material of wall construction to provide continuity of the air barrier plane.

Glaze top surface of the vapor retarder if insulation is not placed immediately.

****** [OR] ******

PREPARATION AND VAPOR RETARDER APPLICATION - METAL DECK - WITHOUT GYPSUM SHEATHING

[Install preformed sound absorbing glass fiber insulation strips supplied by Section [05311] [________] in acoustic deck flutes. Install in accordance with manufacturer's instructions.]

Apply fire resistant vapor retarder to deck surface with adhesive in accordance with manufacturer's instructions.

****** [OR] ******

[Apply coat of primer by roller on top of flute surfaces. Allow to dry.]

Apply ribbon mop of bitumen to top of flute surfaces; embed one ply of factory coated base sheet; lap plies 4 inches (100 mm); seal joints with bitumen.

Mop glaze coat over coated base sheet at a rate of 10 lb/square (0.5 kg/sq m) and embed one ply of roof felt; lap edges 4 inches (100 mm); seal joints with bitumen.

Apply bitumen to [20] [_____] lb/square ([98] [_____] kg/100 sq m).

Lap [flexible flashings] over air seal material of wall construction to provide continuity of the air barrier plane.

Glaze top surface of the vapor retarder if insulation is not placed immediately.

****** [OR] ******

PREPARATION AND VAPOR RETARDER APPLICATION - METAL DECK - WITH GYPSUM SHEATHING

Install gypsum sheathing on metal deck.

Lay with long side at right angle to flutes; stagger end joints; provide support at ends.

Cut sheathing cleanly and accurately at roof breaks and protrusions to provide smooth surface. Tape joints.

Mechanically fasten sheathing at full roof area using [6] [8] [____] fasteners with washers per sheathing board.

****** [OR] ******

Mechanically fasten sheathing at roof perimeter to a distance of [4] [____] ft ([1.5] [____] m) in from edges using [6] [8] [____] fasteners with washers per board.

****** [OR] ******

Mechanically fasten sheathing to roof deck, in accordance with [Factory Mutual] [manufacturer's instructions] [________].

****** [OR] ******

Fasten sheathing to roof deck with continuous mopping of adhesive on each flute] [________].

Apply fire resistant vapor retardant to deck surface with adhesive in accordance with manufacturer's instructions.

****** [OR] ******

Apply roller coat of primer to top of sheathing surfaces. Allow to dry.

Mop surface with hot bitumen and embed two plies of roof felt; lap plies 19 inches (480 mm); full mop each ply. Apply bitumen at the rate of [20] [_____] lb/square ([98] [_____] kg/100 sq m).

Lap [flexible flashings] over air seal material of wall construction to provide continuity of the air barrier plane.

Glaze top surface of the vapor retarder if insulation is not placed immediately.

INSULATION APPLICATION

[Ensure vapor retardant is clean and dry, continuous, and ready for application of roofing system.]

Mechanically fasten [first layer of] insulation to deck. [Embed a second layer of insulation into flood coat mopping of hot bitumen in accordance with insulation manufacturer's instructions.] [Lay second layer of insulation with joints staggered from first layer.]

****** [OR] ******

Embed [one layer] [two layers] of insulation into flood coat mopping of hot bitumen in accordance with insulation manufacturer's instructions. [Lay second layer of insulation with joints staggered from first layer.]

[Place [the constant thickness first layer and] the tapered thickness insulation [second layer] to the required slope pattern in accordance with manufacturer's instructions.]

Place boards parallel to deck flutes with insulation board edges bearing on deck flutes.

****** [OR] ******

Place boards perpendicular to deck flutes with insulation board ends bearing on deck flutes.

Lay boards with edges in moderate contact without forcing. Cut insulation to fit neatly to perimeter blocking and around penetrations through roof.

[Lay tapered boards] [Cut boards to slope] for a distance of [18] [24] [____] inches ([450] [600] [____] mm) back from roof drains for positive drainage.

Do not apply more insulation than can be covered with membrane in same day.

Tape joints of insulation in accordance with insulation manufacturer's instructions.

****** [OR] ******

INSULATION APPLICATION

[Ensure vapor retarder is clean and dry, continuous, and ready for application of roofing system.]

Mechanically fasten [first layer of] insulation to deck in accordance with insulation manufacturer's instructions.

Place the second layer of insulation with joints staggered [minimum [6] [____] inch ([150] [____] mm)] from joints of first layer.

Mechanically fasten boards [for distance of [____] inch ([____] mm) from roof edge] [over roof surface].

****** [OR] ******

Place [____] fasteners per [insulation board] [[____] sq ft ([____] sq m)].

[Place [the constant thickness first layer and] the tapered thickness insulation [second layer] to the required slope pattern in accordance with manufacturer's instructions.]

Place boards [parallel] [perpendicular] to deck flutes with edges over flute surface for bearing support.

Lay boards with edges in moderate contact without forcing. Cut insulation to fit neatly to perimeter blocking and around penetrations through roof.

[Lay tapered boards] [Cut boards to slope] for a distance of [18] [24] [____] inches ([450] [600] [____] mm) back from roof drains for positive drainage.

Apply no more insulation than can be covered with membrane in same day.

Tape joints of insulation in accordance with insulation manufacturer's instructions.

MEMBRANE APPLICATION

[Lay one ply coated base sheet, coated side down. Lap sides 2 inches (50 mm); lap ends 6 inches (150 mm).]

Equiviscous Temperature (EVT) at Point of Application: In accordance with NRCA.

Apply [3] [4] plies of roof felt [over coated base ply,] weather lap edges and ends, mopped with [20] [____] lb/square ([98] [____] kg/100 sq m) of bitumen per ply. [Apply felt 2 on 2 in [same] [opposite] direction.]

Apply felts smooth, free from air pockets, wrinkles, fishmouths, or tears.

Extend [base ply and] membrane felts up cant strips and minimum of [4] [6] [____] inches ([100] [150] [____] mm) onto vertical surfaces and under gravel stops. Mop on two additional plies of felt and one ply of granular surfaced felt as base flashings over roofing membrane plies. Secure to [nailing strips at [4] [____] inches ([100] [____] mm) oc] [and] [reglets].

Install two plies membrane and bitumen glaze coat for cut-off at end of day's operation. Glaze felts exposed at end of working day. Remove cut-off before resuming roofing.

Mop and seal two additional plies of felt around roof penetrations.

Install traffic pads by setting in [hot asphalt at [20] [____] lb/square ([98] [____] kg/100 sq m).] [cold mastic at 2 gal/sq ft (97 L/sq m).] Set joints [6] [____] inches ([150] [____] mm) apart.

FLASHINGS AND ACCESSORIES

Apply [granular surfaced felt] [flexible] base flashings to seal membrane to vertical elements.

Install one roof vent per [1,000] [1,500] [2,000] [________] sq ft ([93] [140] [186] [____] sq m) or part thereof, of roof area.

Install prefabricated roofing [control] [and] [expansion] joints to isolate roof into areas [as indicated.] [in accordance with manufacturer's instructions.]

***** [OR] *****

Fabricate roofing [control] [and] [expansion] joints to isolate roof into areas as indicated.

Coordinate installation of roof [drains] [sumps] [________] and related flashings to NRCA Drawing [W-1] [____].

Mop in and seal flashings and flanges of items penetrating membrane with two plies of felt.

AGGREGATE SURFACING

Apply uniform flood coat of bitumen at rate of 60 lb/square (293 kg/100 sq m) and while hot, embed a single application of roofing aggregate at rate of [400] [____] lb/square ([1 957] [____] kg/100 sq m).

****** [OR] ******

Apply uniform flood coat of bitumen at rate of 60 lb/square (293 kg/100 sq m) and while hot, embed the first application of roofing aggregate at rate of [300] [____] lb/square ([1 467] [____] kg/100 sq m). Sweep away loose aggregate prior to application of second coat. Apply second flood coat of bitumen at a rate of [40] [____] lb/square ([195] [____] kg/100 sq m) and while hot, embed a second application of roofing aggregate at rate of [300] [____] lb/square ([1 470] [____] kg/100 sq m).

Evenly distribute aggregate and ensure bond with flood coat. Extend aggregate to bottom edge of cant strips.

[Butt aggregate to edge of traffic pads.]

****** [OR] ******

[ALUMINIZED] [EMULSION] SURFACING

Apply surfacing in accordance with manufacturers instructions.

Apply aluminized coating to bitumen top surface at the rate of [1-1/2 to 2] [________] gal/100 sq ft ([0.38 to 0.5] [________] kg/sq m).

****** [OR] ******

Apply emulsion coating to bitumen top surface at the rate of [3] [____] gal/100 sq ft ([0.75] [____] kg/sq m).

FIELD QUALITY CONTROL

Field inspection [and [field [laboratory] testing] will be performed under provisions of Section [01410.] [________.]

Correct identified defects or irregularities.

Require site attendance of roofing [and insulation] material manufacturers [daily] [________] during installation of the Work.

[Field] [Laboratory] Testing: [To ascertain bitumen quantities placed.] [________.]

CLEANING

Remove bituminous markings from finished surfaces.

In areas where finished surfaces are soiled by bitumen or any other source of soiling caused by work of this section, consult manufacturer of surfaces for cleaning advice and conform to their [documented] instructions.

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

PROTECTION OF FINISHED WORK

Where traffic must continue over finished roof membrane, protect surfaces.

END OF SECTION