SECTION 07553

PROTECTED MEMBRANE - ELASTOMERIC SHEET ROOFING

PART 1 GENERAL

SECTION INCLUDES

[Sheathing over metal deck surface.]

Membrane roofing, base and counter flashings, roof membrane expansion joints, roof insulation.

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

PRODUCTS FURNISHED BUT NOT INSTALLED UNDER THIS SECTION

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

PRODUCTS INSTALLED BUT NOT FURNISHED IN THIS SECTION

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

Section [______-____________]: [In-situ flashing devices] [Special coated metal counterflashings].

RELATED SECTIONS

Section [______-____________]:	Roof deck substrate.

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

[Section 07565 - Preparation for Re-Roofing.]

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

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

Section 07724 - Roof Hatches: Counterflashing and [________].

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

Section [08952 - Translucent Panel System] [08960 - Sloped Glazing]: Counterflashing 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 D412 - Rubber Properties in Tension.

ANSI/ASTM D746 - Brittleness Temperature of Plastics and Elastomeric by Impact.

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

ASTM C578 - Preformed, Cellular Polystyrene Thermal Insulation.

ASTM D448 - Standard Sizes of Coarse Aggregate for Highway Construction.

ASTM D624 - Rubber Property - Tear Resistance.

ASTM D822 - Practice for Operating Light and Water-Exposure Apparatus (Carbon-Arc) Type for Testing Paint, Varnish, Lacquer, and Related Products.

ASTM D1004 - Initial Tear Resistance of Plastic Film and Sheeting.

ASTM D2240 - Rubber Property - Durometer Hardness.

ASTM E96 - Water Vapor Transmission of Materials.

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

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

SPRI - Wind Design Guide for Ballasted Single Ply Roofing Systems.

Underwriters Laboratories (UL) - Fire Hazard Classifications.

SYSTEM DESCRIPTION

Elastomeric Sheet Membrane Conventional Roofing System: One ply protected membrane system with loose laid insulation cover [, water pervious fabric] and [gravel] [paver] [concrete] ballast finish.

NRCA Specification Plate: [________________].

Criteria for Ballasting Membrane System:	SPRI - Wind Design Guide for Ballasted Single Ply Roofing Systems System [1] [2] [3], Exposure [E.] [P.]

SUBMITTALS

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

Shop Drawings: Indicate [joint or termination detail conditions,] [conditions of interface with other materials] [paver ballast cover pattern].

Product Data: Provide characteristics on membrane materials, flashing materials, insulation [, pavers] and [________].

Samples:	Submit [two] [_______], [____x____] inch ([____x____] mm) in size illustrating [insulation] [paver] [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, humidity, 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 membrane, insulation, ballast, and typical base and counter flashings; 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. Protect foam insulation from direct sunlight exposure.

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 the installation of 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 AND ASSOCIATED MATERIALS

Membrane: [EPDM] [PVC] [Neoprene] [CPE] [CSPE] [PIB] [Composite lamination of [________] and [________] materials]; [____] inch ([____] mm) thick, [____] inch ([____] mm) wide roll; [________] color [as selected]; conforming to the following criteria:

Properties_________	Test_________	Results

Tensile Strength:	ANSI/ASTM D412	[________]

Elongation:	ANSI/ASTM D412	[________]

Hardness - Shore A:	ASTM D2240	[________]

Tear Strength:	ASTM [D624][D1004]	[________]

Water Absorption:	[________]	[________]

Moisture Vapor Perms:	ASTM E96	[________]

Exposure:	ASTM D822	[________]

Low Temperature Brittleness: ANSI/ASTM D746	[________]

Seaming Materials: [As recommended by membrane manufacturer] [________].

SUBSTRATE COVERING MATERIALS

Gypsum Sheathing: [ANSI/ASTM C707;] [1/2] [____] inch ([12.7] [____] mm) thick; uncoated face, fire rated.

MANUFACTURERS - INSULATION

[________________________________] Product [_________].

[________________________________] Product [_________].

[________________________________] Product [_________].

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

INSULATION

Insulation: [ASTM C578 Type VI,] extruded polystyrene board with natural skin surfaces; drainage channels 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] [____]) as determined by ASTM C177.

Board Edges:	square.

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

Concrete Clad Insulation: [ASTM C578 Type VI,] extruded polystyrene board, factory bonded to a Portland cement concrete layer 3/8 inch (9 mm) thick on one face, drainage channels opposite 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:	K factor of [0.20] [____]

(KSI factor of [0.35] [____]) as

determined by ASTM C177.

Board Edges:	square.

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

BALLAST

Aggregate: [ASTM D448, Gradation # [57] [____]] 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 is not acceptable.

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

Pavers: Precast concrete units, [4,000] [________] psi ([28] [____] MPa) air entrained mix; [24 x 24 x 2] [________] inch ([600 x 600 x 50] [________] mm) size, [smooth] [broom] [________] finish.

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

Paver System: [________] manufactured by [________________].

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

Pavers: [________] units, [________] inch ([________] mm) size, [________] finish.

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

Water Pervious Fabric: Black, open to moisture movement, [woven polyethylene] [non-woven polyester] [non-woven polyethylene] [________________], U.V. stabilized; [________] manufactured by [________________].

Cushion Sheet:	[_______________]

FLASHINGS

Flexible Flashings: [Same material as membrane] [EPDM] [Butyl] [Neoprene] [________]; [black] [white] color; [________] manufactured by [________________].

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

Flexible Flashings: [Same material as membrane] [EPDM] [Butyl] [Neoprene] [________]; 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] [________].

Counterflashings: [____] metal, as specified in Section [07620.] [________.]

Prefabricated 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 counterflashings flashings and [wood] [________] materials, as detailed.

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

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

ACCESSORIES

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

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

Wood Cant Strips: Specified in Section [06114.] [________.]

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

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

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

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

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

Sealants: [As recommended by membrane manufacturer] [________________].

Strip Reglet Devices: [Galvanized steel] [Extruded plastic] [________________]; maximum possible lengths per location, with attachment flanges.

PART 3 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, free of depressions, waves, or projections, properly sloped to [drains]

[valleys,] [or] [eaves].

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.]

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 decking 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.]

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 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] [________].

MEMBRANE APPLICATION

Apply membrane in accordance with manufacturer's instructions.

Roll out membrane, free from wrinkles or tears. Place sheet into place without stretching.

Overlap edges and ends and seal by [solvent] welding] [heat welding] [contact tape] [contact adhesive], minimum [3] [____] inches ([75] [____] mm). Seal permanently waterproof. [Apply uniform bead of sealant to joint edge.]

[Shingle joints on sloped substrate in direction of drainage] [Apply joint tape and seal].

Extend membrane up cant strips and minimum of [6] [____] inches ([150] [____] mm) onto vertical surfaces.

Seal membrane around roof penetrations.

FLASHINGS AND ACCESSORIES

Apply flexible flashings to seal membrane to vertical elements.

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

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.

Seal flashings and flanges of items penetrating membrane.

INSTALLATION - UNCLAD INSULATION

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

Place insulation boards; butt in close contact.

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

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

INSTALLATION - CONCRETE CLAD INSULATION

Place channel cut face down.	Bevel insulation to allow snug fit at cant strips. 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

[Place cushion sheet over sheet membrane prior to placing ballast.]

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

Evenly distribute aggregate cover.

Paver Ballast: Place pavers [at roof areas indicated] [________________].

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.

Paver System: [________] manufactured by [________________].

Install concrete topping specified under Section [03001] [03300].

FIELD QUALITY CONTROL

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

Correct identified defects or irregularities.

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

CLEANING

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