SECTION 07545

COATED FOAMED ROOFING

PART 1 GENERAL

SECTION INCLUDES

Foamed-in-place insulation.

Protective overcoat.

RELATED SECTIONS

Section [______-____________]:	Roof substrate.

Section 07190 - Vapor and Air Barriers.

[Section 07212 - Board Insulation: Supplementary rigid insulation boards.]

Section 07214 - Foamed-In-Place Insulation: Interior applications.

Section 07620 - Sheet Metal Flashing and Trim: Perimeter flashings; counter flashings to roof penetrations.

REFERENCES

ANSI/ASTM C177 - Steady-State Thermal Transmission Properties by Means of the Guarded Hot-Plate.

ANSI/ASTM C273 - Shear Test in Flatwise Plane of Flat Sandwich Constructions or Sandwich Cores.

ANSI/ASTM D1621 - Compressive Properties of Rigid Cellular Plastics.

ANSI/ASTM D1622 - Apparent Density of Rigid Cellular Plastics.

ASTM C518 - Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus.

ASTM D412 - Test Method for Rubber Properties in Tension.

ASTM D1623 - Test Method for Tensile Strength and Tensile Adhesion Properties of Rigid Cellular Plastics.

ASTM D2126 - Test Method for Response of Rigid Cellular Plastics to Thermal and Humid Aging.

ASTM D2482 - Wax Pick Test for Surface Strength of Paper.

ASTM D2856 - Test Method for Open Cell Content of Rigid Cellular Plastics by the Air Pycnometer.

ASTM E84 - Surface Burning Characteristics of Building Materials.

ASTM E96 - Water Vapor Transmission of Materials.

ASTM E398 - Test Method for Water Vapor Transmission Rate of Sheet Materials Using a Rapid Technique for Dynamic Measurement.

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

UL 790 - Tests for Fire Resistance of Roof Covering Materials.

SUBMITTALS

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

Product Data: Provide data on [foam insulation] [and] [overcoat], physical and chemical properties, preparation of substrate required, product limitations, and cautionary requirements.

Samples:	Submit [two] [_______] samples of roof finish covering, [____x____] inch ([____x____] mm) in size illustrating color and texture.

Test Reports: Provide test reports indicating that specified requirements are achieved by the Products being supplied.

Manufacturer's Installation Instructions: Indicate installation requirements and procedures.

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

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 minimum [three] [_______] years [documented] experience.

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

Work of this section to conform to [manufacturer's instructions.] [________.]

REGULATORY REQUIREMENTS

Conform to [applicable] [________] code for [fire resistance ratings] [________] of [overcoat] [roof system].

Underwriters Laboratories, Inc. UL 790: Class [____] Fire Hazard Classification.

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

MOCKUP

Provide mockup of roof system under provisions of Section [01400.] [________.]

Mockup Size:	[10 x 10] [________] feet ([3 x 3] [________] m), including insulation, overcoat, and typical counter flashings specified in Section [07620] [________]; 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.] [________.]

Protect stored products from ambient temperatures below [75] [____] degrees F ([24] [____] degrees C).

ENVIRONMENTAL REQUIREMENTS

Do not install foam insulation under the following conditions:

When ambient temperature is below [50] [____] degrees F ([10] [____] degrees C) or above [110] [____] degrees F ([43] [____] degrees C).

When relative humidity is above [80] [____] percent.

When wind velocity is above [10] [____] mph ([16] [____] km/h).

Do not install overcoat under the following conditions:

When ambient temperature is below [____] degrees F ([____] degrees C).

When wind velocity is above [____] mph ([____] km/h).

Not in rain.

SCHEDULING

Schedule work under the provisions of Section [01300.] [________.]

Schedule work after all penetrations through roof are complete and perimeter conditions are ready to receive roof system.

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

Warranty: Include coverage of [roofing system] [overcoat] for [delamination of bond] [discoloration or fading] [water tightness] [and] [________].

PART 2 PRODUCTS

MANUFACTURERS

[__________________________________] Product [_________].

[__________________________________] Product [_________].

[__________________________________] Product [_________].

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

FOAM INSULATION MATERIALS

Foam Insulation: Polyurethane type, as follows:

Thermal Conductivity: [ANSI/ASTM C177] [ASTM C518] as follows:

K value of [____] initial at 32 degrees F (ksi value of [____] initial at 0 degrees C).

K value of [____] initial at 75 degrees F (ksi value of [____] initial at 24 degrees C).

Water Vapor Permeability: ASTM E96; [____] perms ([____] perms).

Water Absorption: ASTM D2482; [____] lb/sq ft at 96 hours, 2 inch immersion.

Closed Cell Content: ASTM D2856, [____] percent.

Compressive Strength: ANSI/ASTM D1621; [____] psi ([____] kPa).

Tensile Strength: ASTM D1623, [____] psi ([____] kPa).

Shear Strength: ANSI/ASTM C273, [____] psi ([____] kPa).

Dimensional Stability: ASTM D2126, [____] percent volume change at 28 days, 150 degrees F, 100 percent relative humidity.

Density:	ANSI/ASTM D1622; [2.5] [3] [____] lb/cu ft ([40] [48] [____] kg/cu m).

Surface Burning Characteristics: ASTM E84, [____/____] rating.

Substrate Primer: [As required by insulation manufacturer.] [________.]

OVERCOAT MATERIALS

Overcoat: [Acrylic] [Butyl] [Hypalon] [Neoprene] [Polyurethane] [Silicone] [Vinyl] [________] base and cover coats, [________] color [as selected], with the following properties:

Property________________Value___________Test Method

Tensile Strength	[____]	ASTM D412

Elongation	[____]	ASTM D412

Water Vapor Permeance	[____]	ASTM E398

Walkway Reinforcement: [Open weave glass fiber cloth.] [________.]

Granule Cover: [Ceramic coated roofing granules] [________], [____] size, [________] color [as selected].

ACCESSORIES

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

Cant Strip: [Wood, as specified in Section [06114] [________], preformed to [45 degree angle.] [configuration as detailed.]

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

Cant: Spray applied foam insulation, filleted to interruptions and penetrations through roof surface.

[Fire Resistant] Sheet Vapor Retardant: Conform to [UL 790] [FM] requirements; [non-bituminous foil and fibrous mesh type] [plastic sheet]; including compatible fire retardant adhesive, [________] manufactured by [________________]

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

Sheet Vapor Retardant:	[________].

Sealant:	[[Single] [Multi-component] [silicone] [urethane]] [Type recommended by roofing manufacturer], [________] color [as selected].

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

PART 3 EXECUTION

EXAMINATION

Verify deck substrate under provisions of Section [01039.] [________.]

Verify that deck surface is smooth and dry and deck joints do not exceed [1/16] [____] inch ([1.5] [____] mm).

Verify that concrete substrate is cured with moisture content not exceeding [12] [____] percent.

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

Verify that wood substrate moisture content does not exceed [12] [____] percent; no depressions or splinters exist. Verify flatness and tight joints of wood decking.

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

Verify that metal deck has no gaps and laps are closed.

PREPARATION - WOOD DECK

Seal joints of plywood with tape.

Fill knot holes with latex filler.

Remove materials or substances that will interfere with total adhesion of foam insulation to substrate.

Mask off adjacent surfaces that are not scheduled to receive foam.

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

PREPARATION - CONCRETE DECK

Fill surface honeycomb and variations with latex filler.

Remove materials or substances that will interfere with total adhesion of foam insulation to substrate.

Mask off adjacent surfaces that are not scheduled to receive foam.

****** [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.]

Remove materials or substances that will interfere with total adhesion of foam insulation to substrate.

Mask off adjacent surfaces that are not scheduled to receive foam.

PREPARATION - TO EXISTING ROOF SYSTEM

Prepare [existing] roofing surface by [installing deck

sheathing] [________________].

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

Prepare existing roofing surface in accordance with Section 07565 - Preparation for Re-Roofing.

Install vapor retardant to [________].

Utilize materials or substances that will not interfere with total adhesion of foam insulation.

Mask off adjacent surfaces that are not scheduled to receive foam.

INSULATION INSTALLATION

Apply primer and foam insulation in accordance with manufacturer's instructions.

Place insulation to [____] inch ([____] mm) thickness; plus [1/4] inch ([6] [____] mm), minus zero.

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

Place insulation to a thickness to achieve an average thermal resistance R value of [____] (RSI value of [____]).

Extend foam [2] [____] inches ([50] [____] mm) up vertical intersections, fillet insulation and feather out. Form a cant of foam at perpendicular interruptions.

Apply foam to slope to drains minimum [1/8] [____] inch per foot ([1] [____] mm per m).

[Surface Flatness: [1/4] [____] inch per 10 foot ([6] [____] mm per 3 m) measured with a straight edge.]

Apply foam to permit [first coat of] overcoat application [on same day.] [within [24] [____] hours.] If this time limit is exceeded, prepare foam skin surface in accordance with manufacturer's instructions.

Develop finish skin surface to smooth and unbroken "rough orange peel" texture. Uneven surfaces are not acceptable.

FLASHINGS AND ACCESSORIES

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.

OVERCOAT INSTALLATION

Install overcoat in accordance with manufacturer's instructions.

Prepare and seal penetrations through roof with sealant.

Apply overcoat in [two] [____] coats [with dissimilar colors for each coat] to a total dry film thickness of [20] [____] mils ([0.5] [____] mm) minimum.

Extend overcoat to cover foam insulation and extend [2] [____] inches ([50] [____] mm) above foam termination on protrusions to a self terminating, water tight seal.

Install walkway reinforcement in un-cured [base] [________] overcoat. Apply additional overcoat over reinforcement to achieve complete cover.

Apply roof surface granules [at a rate of [____] ([____])] in accordance with manufacturer's instructions.

FIELD QUALITY CONTROL

Field [inspection and] testing will be performed under provisions of Section [01400.] [________.]

Testing will include verification of insulation properties, [thickness] [R value], coverage of overcoat, number of coats, and color.

CLEANING

Clean work under provisions of [01700.] [________.]

Remove excess insulation or overcoat 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 OF FINISHED WORK

Protect finished Work under provisions of Section [01500.] [________.]

Ensure roof surface is free of traffic for minimum [three] [____] days after overcoat application.

SCHEDULES

New Main Roof: Insulation to R value of 20, overcoat of white hypalon.

Existing Building Roof: New vapor retardant of sealed sheet plastic, insulation to 2 inch thickness, overcoat of polyurethane, Slate Gray granular cover.

END OF SECTION