SECTION 07536

MODIFIED BITUMEN ROOFING - CONVENTIONAL APPLICATION

PART 1 GENERAL

SECTION INCLUDES

[Sheathing over deck surface] [and vapor retardant].

Insulation, membrane roofing and base flashings.

PRODUCTS INSTALLED BUT NOT FURNISHED IN THIS SECTION

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

RELATED SECTIONS

Section [______-____________]:	Roof deck surface substrate.

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

[Section 07565 - Preparation for Re-Roofing.]

Section 07620 - Sheet Metal Flashing and Trim: Weather protection to base flashings.

Section 07710 - Prefabricated Roof Specialties.

Section 07724 - Roof Hatches.

Section 07810 - Plastic Skylights: Skylight frame [and integral curb].

Section [08952 - Translucent Panel System] [08960 - Sloped Glazing]: Base counter flashing and [________].

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

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

Section [_____-__________]: Lightning protection.

REFERENCES

ANSI/ASTM C707 - Gypsum Board Substrate for Floor or Roof Assemblies.

ANSI/ASTM D41 - Asphalt Primer Used in Roofing, Damproofing, and Waterproofing.

ANSI/ASTM D312 - Asphalt Used in Roofing.

ANSI/ASTM D2178 - Asphalt Impregnated Glass (Felt) Mat Used in Roofing and Waterproofing.

Factory Mutual (FM) Engineering Corporation - Roof Assembly Classifications.

FS HH-I-526 - Insulation Board, Thermal (Mineral Fiber).

FS HH-I-529 - Insulation Board, Thermal (Mineral Aggregate).

FS HH-I-530 - Insulation Board, Thermal (Urethane).

FS HH-I-551 - Insulation Block and Boards, Thermal (Cellular Glass).

FS LLL-I-535 - Insulation Board, Thermal (Cellulosic Fiber).

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

Underwriters Laboratories (UL) - Fire Hazard Classifications.

SYSTEM DESCRIPTION

Modified Bitumen Conventional Roofing System: [One] [Two] ply membrane system with [vapor retardant] [insulation] [and] [aggregate surface] [mineral surface cap sheet] [aluminum coated] finish.

NRCA Specification Plate: [________________].

SUBMITTALS

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

Shop Drawings:	Indicate setting plan for tapered insulation.

Product Data: Provide membrane and bitumen materials, base flashing materials, insulation, vapor retardants, [aluminized coating,] and [________].

Samples:	Submit [two] [_______] samples, [____x____] inch ([____x____] mm) in size illustrating [insulation] [and] [________].

Samples:	Submit [two] [____] sample one lb (0.5 Kg) containers of roofing aggregate.

Manufacturer's Installation Instructions: Indicate special precautions required for seaming the membrane.

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

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

Reports:	Indicate procedures followed, ambient temperatures and wind velocity during application, [and] [________________].

QUALIFICATIONS

Manufacturer: Company specializing in manufacturing the products specified in this Section with [three] [_______] years [documented] experience.

Applicator: Company specializing in performing the work of this Section [with [____] years [documented] experience] [and] [approved by system manufacturer].

Work of this Section to conform to [NRCA Roofing and Waterproofing Manual] [manufacturer's instructions] [________].

REGULATORY REQUIREMENTS

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

Underwriters Laboratories, Inc. (UL): Class [A] [____] Fire Hazard Classification.

Factory Mutual Engineering Corporation (FM):	Roof Assembly Classification, of Class [1] [____] Construction, wind uplift requirement of [I60] [I90], in accordance with FM Construction Bulletin 1-28.

MOCKUP

Provide mockup of roof membrane system and associated components and accessories under provisions of Section [01400] [________].

Mockup Size:	[10 x 10] [________] feet ([3 x 3] [________] m), including insulation, surfacing, and typical base and counter flashings specified in Section [________]; at location designated.

Mockup may [not] remain as part of the Work.

PRE-INSTALLATION CONFERENCE

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

Review installation procedures and coordination 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, seals and labels intact.

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

Stand roll materials on end.

ENVIRONMENTAL REQUIREMENTS

Do not apply roofing membrane during [inclement weather] [ambient temperatures below [____] degrees F ([____] degrees C) or above [____] degrees F ([____] degrees C)].

Do not apply roofing membrane to damp or frozen deck surface.

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

COORDINATION

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

Coordinate the work with installing associated metal flashings as the work of this Section proceeds.

WARRANTY

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

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

PART 2 PRODUCTS

MANUFACTURERS - MEMBRANE MATERIALS

[__________________________________] System [_________].

Other acceptable manufacturers offering equivalent products:

[______________________________] System [_________].

[______________________________] System [_________].

[______________________________] System [_________].

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

MEMBRANE MATERIALS

Membrane: Asphalt and polymer modifiers of [styrene-butadiene-styrene (SBS)] [atactic polypropylene (APP)] type, reinforced with nonwoven [polyester] [fiber glass] [polyethylene] [polypropylene]; [smooth] surfaced [with aluminum coating] [mineral granule] [________________]; [torch] [________] applied.

Thickness	[____] mils ([____] mm)

Average Weight	[____] lb/sq ft ([____] kg/sq m)

Sheet Width	[____] inch ([____] mm)

Tensile Strength	[______] psi ([____] MPa) when tested

to [________]

Elongation to Break [____] percent when tested to

[________]

Aging	[None] [________] when tested to

[________]

Elasticity	[____] percent with full recovery

without set when tested to	[________].

SHEET MATERIALS

Glass Fiber Felts:	ANSI/ASTM D2178, Type IV.

Base Sheet: [Type required by membrane manufacturer] [[vented] asphalt saturated and coated inorganic base sheet].

Dry Sheathing Paper:	[Clean, white-cellulose] [Red rosin] paper, unsaturated.

Gypsum Sheathing: [ANSI/ASTM C707;] [1/2] [____] inch ([13] [____] mm) thick; uncoated face, fire rated.

Fire Resistant Sheet Vapor Retardant: Conform to [UL] [FM] requirements; [reinforced asphalt/kraft paper laminate] [non-bituminous foil and fibrous mesh type] [plastic sheet]; including compatible fire retardant adhesive; [________] manufactured by [________________]

BITUMINOUS MATERIALS

Asphalt Bitumen: ANSI/ASTM D312, Type [____].

Asphalt Primer: ANSI/ASTM D41.

MANUFACTURERS - INSULATION

[___________________________________] Product [_________].

[___________________________________] Product [_________].

[___________________________________] Product [_________].

Substitutions: Under provisions of Section [01600]

[________].

INSULATION

Insulation: [FS LLL-I-535, Class C;] cellulose fiber board; with the following characteristics:

Board Density [____] lb/cu ft ([____] kg/cu m)	Board Size [__ x __] inch ([__ x __] mm)	Board Thickness [____] inches ([____] mm)

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

factor of [0.62] [____])

Board Edges	[Square] [Ship lapped].

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

Insulation: [FS HH-I-526;] 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 Density [____] lb/cu ft ([____] kg/cu m)	Board Size [__ x __] inch ([__ x __] mm)	Board Thickness [____] inches ([____] mm)

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

factor of [0.62] [____])

Board Edges	[Square] [Shipped lapped].

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

Insulation: [FS HH-I-530, Type [I] [II], Class 2;] urethane rigid board, both faces finished with polyethylene treated kraft paper; with the following characteristics:

Board Density [____] lb/cu ft ([____] kg/cu m)	Board Size [__ x __] inch ([__ x __] mm)	Board Thickness [____] inches ([____] mm)

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

factor of [0.62] [____])

Board Edges	[Square] [Shipped lapped].

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

Insulation: [FS HH-I-529;] expanded perlite mineral aggregate board; with the following characteristics:

Board Density [____] lb/cu ft ([____] kg/cu m)	Board Size [__ x __] inch ([__ x __] mm)	Board Thickness [____] inches ([____] mm)

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

factor of [0.62] [____])

Board Edges	[Square] [Shipped lapped].

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

Insulation: [FS HH-I-551;] cellular glass board; with the following characteristics:

Board Density [____] lb/cu ft ([____] kg/cu m)	Board Size [__ x __] inch ([__ x __] mm)	Board Thickness [____] inches ([____] mm)

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

factor of [0.62] [____])

Board Edges	[Square] [Shipped lapped].

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

Insulation: Composite manufacturer 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 [____] inches ([____] mm)

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

factor of [0.62] [____])

Board Edges	[Square] [Shipped lapped].

BASE FLASHINGS

Base Flashing: Flexible sheet flashing, [modified bitumen] [butyl] [________________], [aggregate surfaced,] type to suit membrane sheeting.

CANTS

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

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

Wood Cants: Specified in Section [06114] [________].

SURFACING

Aggregate: Washed, [crushed stone] [gravel], [3/8] [____] inch ([9] [____] mm) minimum to [5/8] [____] inch ([15] [____] mm) maximum size. Fines, dirt, or organic material is not acceptable.

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

Mineral Surfacing: Fine mineral granules, [shop] [field] applied, [________] color [as selected].

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

Aluminum Coating: Aluminized coating, [shop] [field]

applied.

ACCESSORIES

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

Sheathing Joint Tape: [Paper] [Heat resistant] [________] type.

Roofing Nails: Galvanized or non-ferrous type, size as required to suit application.

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

Prefabricated Control or Expansion Joint Flashing: Sheet butyl reinforced with closed cell urethane foam backing, seamed into metal flashing flanges, including sheet butyl counter flashing each side; [________] manufactured by [________________].

PART 3 EXECUTION

EXAMINATION

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

Verify deck is supported and secured.

Verify deck is clean and smooth, free of depressions, waves, or projections, properly sloped to [drains,] [valleys,] [or] [eaves].

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

Verify deck surfaces are dry and free of snow or ice. [Verify flutes of metal deck are clean and dry.] Confirm dry deck by moisture meter with [12] [____] percent moisture maximum.

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

PREPARATION - WOOD DECK

Verify flatness and tight joints of wood decking.

Seal joints of plywood with tape.

Fill knot holes with latex filler.

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

PREPARATION - CONCRETE DECK

Fill surface honeycomb and variations with latex filler.

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

PREPARATION - METAL DECK

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

VAPOR RETARDANT APPLICATION - WOOD DECK

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

Lay 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 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 felt; lap plies 19 inches (480 mm), full mop each ply. Apply bitumen at [20] [____] lb/square ([198] [____] mm/sq m).

Extend vapor retardant under cant strips and blocking.Lap [flexible flashings] over vapor [and air] barrier of wall construction to provide continuity of vapor [and air] barrier envelope.

[Glaze top surface of vapor retardant if insulation is not placed immediately.]

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

VAPOR RETARDANT APPLICATION - CONCRETE DECK

Apply primer at one gal/square (48 L/100 sq m) and allow to dry.

[Lay a two ply strip of dry applied felt 18 inches (450 mm) wide over precast concrete deck joints.]

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 [20] [____] lb/square ([98] [____] kg/100 sq m).

Extend vapor retardant under cant strips and blocking.Lap [flexible flashings] over vapor [and air] barrier of wall construction to provide continuity of vapor [and air] barrier envelope.

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

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

VAPOR RETARDANT APPLICATION - METAL DECK WITHOUT SHEATHING

Apply fire resistant vapor retardant 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 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).

Extend vapor retardant under cant strips and blocking.Lap [flexible flashings] over vapor [and air] barrier of wall construction to provide continuity of vapor [and air] barrier envelope.

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

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

VAPOR RETARDANT APPLICATION - METAL DECK WITH SHEATHING

Install gypsum sheathing on metal deck [using continuous mopping of adhesive on each flute] [________________].

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 [perimeter] [full roof area] of roof deck, to a distance of [4] [____] ft ([1.5] [____] m) in from edges using [6] [8] [____] fasteners

with washers per board.

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

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

Apply coat of primer by roller. Allow to dry.

Apply mop coating of bitumen; 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 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).

Extend vapor retardant under cant strips and blocking.Lap [flexible flashings] over vapor [and air] barrier of wall construction to provide continuity of vapor [and air] barrier envelope.

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

INSULATION APPLICATION

[Ensure vapor retardant is clean and dry.]

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

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

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

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

Place tapered insulation in accordance with manufacturer's instructions.

Minimum Total Insulation Thickness: [[____] inch ([____] mm)] [As required to achieve an insulation R value of [____] (RSI value of [____])] [To an average R value of [____] (RSI value of [____]) for tapered insulation of [____]].

Lay insulation 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.

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

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

Place insulation [parallel] [perpendicular] to deck flutes with edges over flute surface for bearing support. Place [____] fasteners per [insulation board] [[____] sq ft ([____] sq m)].

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

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

MEMBRANE APPLICATION

[Lay one ply base sheet, coated side down. [Lap sides two inches (50 mm); lap ends 6 inches (150 mm)] [Lap sides and ends in accordance with membrane manufacturer's instructions].]

Equiviscous Temperature of Bitumen at Point of Application: Within 25 degrees F (14 degrees C) of bitumen rating labelled on bitumen container.

Apply membrane; seal seams and ends permanently waterproof.

Apply membrane smooth, free from air pockets, wrinkles, or tears.

Extend membrane up cant strips and minimum of [4] [____] inches ([100] [____] mm) onto vertical surfaces.

Install waterproof cut-off to membrane at end of day's operation. Remove cut-off before resuming roofing.

Mop and seal membrane around roof penetrations.

FLASHINGS AND ACCESSORIES

Apply [[________] surfaced] membrane base flashings to seal membrane to vertical elements.

Secure to [nailing strips at 4 inches (100 mm) oc] [and] [reglets].

Install prefabricated roofing [control] [expansion] joints in accordance with manufacturer's instructions.

Coordinate installation of roof [drains] [sumps] [________] and related flashings.

Seal flashings and flanges of items penetrating membrane.

SURFACING

Apply aluminized coating to 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 [granule] [________] surfacing to top surface at the rate of [____] gal/100 sq ft ([____] kg/sq m).

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

Evenly distribute aggregate over membrane at rate of [400] [300] [____] lb/square ([1 957] [1 467] [____] kg/100 sq m).

FIELD QUALITY CONTROL

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

Correct identified defects or irregularities.

Request site attendance of roofing [and insulation] materials manufacturers during installation of the Work.

CLEANING

Remove bituminous markings from finished surfaces.

In areas where finished surfaces are soiled 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

Protect building surfaces against damage from roofing work.

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

END OF SECTION