SECTION 07556

RUBBERIZED ASPHALT ROOFING - PROTECTED MEMBRANE

PART 1 GENERAL

SECTION INCLUDES

[Sheathing over metal deck surface.]

Membrane roofing and base flashings and roof insulation.

[Aggregate] [Paver] [Concrete] ballast [over water pervious filter fabric].

PRODUCTS INSTALLED BUT NOT FURNISHED IN THIS SECTION

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

[Section [_____-__________]:	Precast concrete pavers for ballast over insulation.]

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.

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

FS HH-I-524 - Insulation Board, Thermal (Polystyrene).

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

Underwriters Laboratories (UL) - Fire Hazard Classifications.

SYSTEM DESCRIPTION

Protected Rubberized Asphalt Bitumen Roofing System:	One ply membrane system with loose laid insulation cover and [gravel] [paver] [concrete] ballast finish.

NRCA Specification Plate: [________________].

SUBMITTALS

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

Product Data: Provide membrane materials, base flashing materials, insulation, and [________].

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

Samples:	Submit [two] [____] sample [5 lb (2.2 Kg) containers of roofing aggregate] [pavers].

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, 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, [water pervious fabric,] ballast, 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, with seals and labels intact.

Store products in weather protected environment, clear of ground and moisture. Protect foam insulation from direct sunlight exposure.

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 MATERIAL

[__________________________________] System [_________].

Other acceptable manufacturers offering equivalent products:

[______________________________] System [_________].

[______________________________] System [_________].

[______________________________] System [_________].

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

MEMBRANE MATERIAL

Membrane: Rubberized asphalt bonded to sheet polyethylene; [60] [____] mil ([1.52] [____] mm) thick; [smooth] [________] surfaced; cold applied.

SHEATHING

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

INSULATION

Insulation: [FS HH-I-524, Type 2, Class B,] extruded polystyrene board with skin surface on one face; [channel cut grooves, one face;] [________] manufactured by [________________], 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 [0.20] [____] (KSI

factor of [0.35] [____])

Board Edges	Square.

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

Concrete Clad Insulation: [FS HH-I-524, Type 2, Class B;] extruded polystyrene board, factory bonded to a Portland cement concrete layer 3/8 inch (9 mm) thick on one face; [________] manufactured by [________________], with the following characteristics:

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

Thermal Conductivity	C factor of [____] (CSI factor of

[____])

Board Edges	Square.

BASE FLASHINGS

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

BALLAST

Aggregate: Sound, hard, washed, [crushed gravel,] [stone,] [3/4] [____] inch ([19] [____] mm) minimum to [1.5] [____] inch ([38] [____] mm) maximum size. Fines (aggregate not less than 1/2 inch (13 mm)), dirt, or organic material are not acceptable.

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

Pavers: [Precast concrete units, 4000 psi (28 MPa) air entrained mix; [24 x 24 x 2] [________] inch ([600 x 600 x 50] [________] mm) size, [smooth] [broom] [________] finish] [________________].

Levelling Pads: [Injection molded plastic, weathering grade, cruciform shape, configured to permit adjustment to height] [________________]; [________] manufactured by [________________].

CANTS

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

ACCESSORIES

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

type.

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

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 [________________].

Water Pervious Filter Fabric: Black, open weave [polyolefin] [polyester] [________________]; [________] manufactured by [________________].

Protective Paint: [White] [________] color latex, residential quality.

Insulation Perimeter Restraint: Metal edge device configured to restrain insulation boards in position and provide top flashing over ballast to system.

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 [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.

[Lay a single ply strip of felt 18 inches (450 mm) wide over precast concrete deck joints. Secure with adhesive.]

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

PREPARATION - METAL DECK WITH SHEATHING

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

Install gypsum sheathing on metal deck. Lay with long side at right angle to flutes; stagger end joints; provide support at ends.

Mechanically fasten sheathing with [12] [____] fasteners with washers per board and at perimeter of roof deck, to a distance of [4] [____] ft ([1.5] [____] m) in from edges using [6] [8] [____] fasteners with washers per board.

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

Tape sheathing joints.

MEMBRANE APPLICATION

Apply membrane primer in accordance with membrane manufacturer's instructions.

Apply membrane; lap and seal edges and ends permanently waterproof.

Apply membrane smooth, free from air pockets, wrinkles, or tears. Ensure full bond of membrane to substrate.

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

Seal membrane around roof penetrations.

FLASHINGS AND ACCESSORIES

Apply 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.

INSTALLATION - INSULATION

[Place channel cut face down. Bevel insulation to allow snug fit at cants. Cut neatly around protrusions through roof.

Place insulation boards; butt in close contact.

[Place water pervious filter fabric over insulation boards in accordance with insulation manufacturer's instructions.]

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

INSTALLATION - CONCRETE CLAD INSULATION [AND BALLAST]

Place channel cut face down.	Bevel insulation to allow snug fit at cants. Cut neatly around protrusions through roof.

Place concrete clad insulation boards; butt in close contact.

Place and fit perimeter restraint to minimize movement of insulation boards.

BALLAST INSTALLATION

Apply dry aggregate ballast at the rate of [1,000] [____] lb/square ([4 900] [____] kg/100 sq m).

Evenly distribute aggregate cover.

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

Install precast concrete pavers [provided under Section [03450] [____]].

Install pavers [directly on insulation] [on leveling pads]. Provide approximately [1/4] [3/8] [____] inch ([6] [9] [____] mm) space between pavers to permit surface water drainage.

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

Install concrete topping specified under Section [03300] [_____].

Set roof drain to achieve weep drainage at membrane level and top grating of drain at finish deck level.

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 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

Protect building surfaces against damage from roofing work.

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

END OF SECTION