SECTION 075713
SPRAYED POLYURETHANE FOAM ROOFING
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PART 1
1.1
1.2
SUMMARY
A.
Section Includes:
1.
Fluid-applied roofing system.
2.
Integral flashings.
3.
Elastomeric coating.
B.
Related Sections:
1.
Division 01: Administrative, procedural, and temporary work requirements.
REFERENCES
A.
1.1
GENERAL
ASTM International (ASTM)
1.
C208 - Standard Specification for Cellulosic Fiber Insulating Board.
2.
C518 - Standard Test Method for Steady-State Thermal Transmission Properties by Means of
the Heat Flow Meter Apparatus.
3.
C1549 - Standard Test Method for Determination of Solar Reflectance Near Ambient
Temperature Using a Portable Solar Reflectometer.
4.
D1621 - Standard Test Method for Compressive Properties of Rigid Cellular Plastics.
5.
D1622 - Standard Test Method for Apparent Density of Rigid Cellular Plastics.
6.
D6083 - Standard Specification for Liquid Applied Acrylic Coating Used in Roofing.
7.
D6226 - Standard Test Method for Open Cell Content of Rigid Cellular Plastics.
8.
E84 - Standard Test Method for Surface Burning Characteristics of Building Materials.
9.
E96/E96M - Standard Test Methods for Water Vapor Transmission of Materials.
10. E108 - Standard Test Methods for Fire Tests of Roof Coverings.
11. E1980 - Standard Practice for Calculating Solar Reflectance Index of Horizontal and LowSloped Opaque Surfaces.
SUBMITTALS
A.
Submittals for Review:
1.
Product Data: Manufacturer's specifications and application instructions.
2.
Samples: 3 x 3 inch roofing samples [in [specified] [selected] color] [showing available colors],
on representative backing.
B.
Sustainable Design Submittals:
1.
Solar Reflectance Index.
2.
Regional Materials.
C.
Quality Control Submittals:
1.
Copy of applicator's current license certificate issued by roofing manufacturer
© 2016, SpexPlus, Inc.
1Q 2016
075713-1
Sprayed Polyurethane Foam Roofing
1.2
1.3
QUALITY ASSURANCE
A.
Applicator Qualifications:
1.
Licensed by manufacturer to apply specified products.
2.
Minimum [2] [__] years [documented] experience in work of this Section.
B.
Pre-Installation Conference:
1.
Convene [2] [__] weeks prior to commencing work of this Section.
2.
Attendance: Architect, [Contractor,] [Construction Manager,] roofing applicator, roofing
manufacturer's representative, and related trades that may affect roofing installation prior to,
during, or following installation.
3.
Review and discuss Contract Documents, roofing system manufacturer's literature, job
conditions, scheduling, and other matters affecting application as appropriate.
4.
If possible, tour representative areas of roofing substrates, and discuss substrate construction,
related items, work conditions, and materials compatibility.
C.
Mockup:
1.
Provide mockup of roofing at specified thickness.
2.
Size: Minimum [100] [__] square feet.
3.
Demonstrate visual and physical characteristics and application procedures.
4.
Locate [____.] [where directed.]
5.
Approved mockup may remain as part of Work.
D.
Roofing System: Minimum Solar Reflectance Index of 78, tested to ASTM C1549 and calculated in
accordance with ASTM E1980.
DELIVERY, STORAGE, AND HANDLING
A.
1.4
1.5
DELIVERY, STORAGE AND HANDLING
A.
Store materials at temperatures between 40 and 100 degrees F.
B.
Do not store at high temperatures in direct sunlight.
PROJECT CONDITIONS
A.
1.6
1.7
Do not apply roofing:
1.
When ambient temperature is below [45] [__] degrees F.
2.
When winds exceed [15] [__] MPH unless windscreens are used.
SCHEDULING
A.
Allow concrete substrate to cure minimum 28 days prior to applying roofing.
B.
Apply foam to permit [first coat of] overcoat application [on same day.] [within 24 hours.] Prepare
foam skin surface in accordance with manufacturer's instructions if this time limit is exceeded.
WARRANTY
A.
PART 2
2.1
Store materials at minimum 75 degrees F; prevent damage to containers. Do not store for long
periods in direct sunlight.
Provide manufacturer’s [5] [__] year warranty providing coverage against water leakage through
roofing system.
PRODUCTS
MANUFACTURERS
Sprayed Polyurethane Foam Roofing
075713-2
© 2016, SpexPlus, Inc.
1Q 2016
2.2
2.3
A.
Acceptable Manufacturers:
1.
Gaco Western, Inc. (www.gaco.com)
2.
NCFI Polyurethanes. (http://www.ncfi.com.www.enduratechroofing.com)
3.
Neogard, Division of Jones Blair Company. (www.neogard.com)
B.
Substitutions: [Under provisions of Division 01.] [Not permitted.]
MATERIALS
A.
Polyurethane Foam:
1.
Type: Two component, plastic resin and catalyst, cold setting foam using EPA-approved, nonozone-depleting blowing agent.
2.
Nominal core density: Minimum [2.7] [__] PCF, tested to ASTM D1622.
3.
Fire hazard classification: Maximum flame spread rating of [75,] [__,] tested to ASTM E84.
4.
Compressive strength parallel to rise: Minimum [40] [__] PSI, tested to ASTM D1621.
5.
Closed cell content: Minimum [90] [__] percent.
6.
R-value: Minimum R-values of [5.5] [__] per inch of thickness, tested to ASTM C518 at 75
degrees F.
B.
Elastomeric Coating:
1.
Description: Ultraviolet-resistant [acrylic] [silicone] [polyurethane] type, resistant to ponding
water, free from plasticizers and migrating fire-retardants.
2.
Class A fire rating over foam on noncombustible deck, tested to ASTM E108.
3.
Physical properties; tested to ASTM D6083:
a.
Tensile strength: Minimum [250] [__] PSI at 73 degrees F.
b.
Elongation at break: Minimum [250] [__] percent at 73 degrees F.
4.
Moisture vapor permeance: Maximum [3.0] [__] perms, tested to ASTM E96/E96M.
ACCESSORIES
A.
Flashings, Primers. Tapes, Adhesives, Thinners, Sealants, and Other Components: Approved by
roofing system manufacturer.
B.
Underlayment Board: ASTM C208, high-density rigid cellulose fiber, [1/2] [__] inch thick.
C.
Underlayment Attachment: [Polyurethanes spray adhesive.] [Hot-dip galvanized or fluoropolymer
coated steel fasteners, approved by roofing system manufacturer, type and length suited to project
conditions, with galvanized steel plates.
PART 3
3.1
3.2
EXECUTION
PREPARATION - GENERAL
A.
Clean surfaces to receive roofing; remove dirt, dust, contaminants, and debris.
B.
Prime surfaces when required by roofing manufacturer.
C.
Protect adjacent and underlying surfaces from accidental application.
PREPARATION - EXISTING BUILT-UP ROOFING
A.
Remove loose gravel by brooming, power sweeping, or vacuuming.
B.
Mechanically fasten loose seams and openings.
C.
Split blisters and mechanically fasten.
D.
Repair or replace loose, damaged, and deteriorated flashings.
© 2016, SpexPlus, Inc.
1Q 2016
075713-3
Sprayed Polyurethane Foam Roofing
3.3
PREPARATION - EXISTING METAL ROOFING
A.
Secure underlayment board to deck with [full adhesive bed.] [fasteners spaced at rate of 11 fasteners
per 4 x 8 foot board.]
**** OR ****
3.4
3.5
3.6
B.
Fill flutes with sprayed insulation, flush with top of deck flutes. Avoid spraying insulation onto top of
deck flutes.
C.
Remove insulation applied higher than top of deck flutes.
PREPARATION - EXISTING SPRAYED FOAM ROOFING
A.
Scarify existing sprayed foam down to adhered foam. Allow foam to dry, then apply primer.
B.
Wire brush degraded surfaces.
C.
Fill cracks, holes, and imperfections with joint sealer.
APPLICATION OF INSULATION
A.
Apply foam insulation in accordance with manufacturer's instructions.
B.
Apply foam in minimum 1/2 inch lifts to [minimum 1 inch thickness.] [minimum [__] inch thickness.]
[thickness required to achieve an average thermal resistance R value of [__].]
C.
Fill low spots to prevent water ponding.
D.
Extend foam minimum [2] [__] inches up vertical intersections, fillet insulation and feather out. Form a
cant of foam at perpendicular interruptions.
E.
Slope foam to drain at minimum [1/8] [1/4] [__] inch per foot.
F.
Develop finish skin surface to smooth and unbroken rough orange peel texture free from voids,
pinholes, and crevices.
G.
Seal flashings and flanges of items penetrating membrane.
H.
Tolerances:
1.
Surface Flatness: [1/4] [__] inch per 10 foot measured with straight edge.
APPLICATION OF ELASTOMERIC COATING
A.
Apply elastomeric coating in accordance with manufacturer's instructions.
B.
Allow spray foam roofing to cure minimum 2 hours before applying base coat.
C.
Apply [one base coat] [two base coats] and one top coat to minimum overall [30] [__] mils dry film
thickness.
D.
Apply first base coat the same day insulation is applied.
E.
Spray or roller apply base coat in crosshatch pattern.
F.
Allow each coat to dry before applying subsequent coats.
Sprayed Polyurethane Foam Roofing
075713-4
© 2016, SpexPlus, Inc.
1Q 2016
G.
3.7
CLEANING
A.
3.8
3.9
Extend elastomeric coating to cover foam insulation and extend [2] [__] inches above foam
termination on protrusions, to self terminating, water tight seal.
Remove excess insulation and topcoat from adjacent surfaces.
ADJUSTING
A.
Patch damaged areas by scarifying, priming, and applying topcoat.
B.
Check completed roofs for ponding water. If present cut drainage channels using rotary wire brush,
then reapply topcoat.
PROTECTION
A.
Do not allow traffic on coated surfaces for period of at least 48 hours, or until completely cured.
END OF SECTION
© 2016, SpexPlus, Inc.
1Q 2016
075713-5
Sprayed Polyurethane Foam Roofing