MASTER CONTRACT SPECIFICATIONS
COATED FOAMED ROOFING 07 57 00
PART 1 - GENERAL
1.01
SUMMARY:
A. RELATED DOCUMENTS: General provisions of contract, plans, details and scope of work as supplied by
roofing system manufacturer.
B. DESCRIPTION OF WORK:
1. This specification covers the silicone roofing system which consists of a seamless sprayed-in-place
urethane foam insulation covered with a silicone coating and a layer of ceramic granules for use as an
insulated roofing system for both new construction and retrofit roofing.
2. The roofing system shall be installed in accordance with the roofing system manufacturer's
requirements, local building codes, and FMGlobal's requirements for a Class 1 roof as though they were
a part of this specification.
C. OTHER WORK THIS SECTION INCLUDES:
1. Preparation of Substrate.
2. Sprayed-in-place Polyurethane Foam (SPF) Insulation.
3. Silicone Roof Coating.
4. Roofing Granules.
5. Walkways.
1.02
SUBMITTALS:
A. Specification Development - The owner/specifier shall supply to the roofing system manufacturer’s
representative:
1. A draft copy of the project specification, including the roofing section, roofing warranty
requirements, and roofing drawings. This shall be completed before project goes out to bid.
2. This draft specification shall be reviewed for general technical acceptance and eligibility for
issuance of a warranty. A letter confirming an appropriate application, drawings and specification,
based on the current available information, will be delivered to the owner’s representative at their
request.
B. Any alternate products shall be submitted to the owner and/or owner’s representative 10 days before
bid date to allow time for product review. Submittals shall include: all appropriate technical data sheets,
manufacturer’s references, warranty, follow-up inspection policy and outline, material safety data sheets,
and a typical, physical sample (3' x 3') to be used as a standard of quality. Manufacturer shall supply list
of geographically appropriate work and list of work of similar size and scope to substantiate their period of
performance, see 2:02A.1.
C. Applicator shall submit to owner’s representative at or before time of bid:
1. Reference projects with contacts, substantiating years of experience and completion of minimum
prior work submitted by applicator.
2. Provide specimen copy of warranty.
3. Submit Underwriters Laboratory, UL 790 Class A, FMGlobal, and local building code approvals as
required.
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MASTER CONTRACT SPECIFICATIONS
1.03
COATED FOAMED ROOFING 07 57 00
QUALITY ASSURANCE:
A. APPLICATOR QUALIFICATIONS: Must be a current Approved Applicator for the selected roofing
system manufacturer. The Applicator must exhibit 5 years and a minimum of 500,000 sq. ft. experience
with the roofing system and projects of a similar scope and nature. If requested, the Qualified Applicator
must furnish the roofing system manufacturer’s Qualified Applicator’s Certificate or other evidence
showing him/her to be a Qualified Applicator. The roofing applicator shall perform all the work of this
section. Subcontracting installation of the silicone coating/polyurethane foam is not allowed.
B. INSPECTIONS: It is the Qualified Applicator’s responsibility to inspect the roof prior to the start of the
application to determine what preparation steps are necessary. The preparation steps may include, but are
not limited to the following:
1. Removal of wet insulation or felts,
2. Removal of loose gravel,
3. Sand blasting, priming, and repair of flashing,
4. Expansion joints and drain details, and
5. The general condition of the roof and the steps required to prepare the roof prior to the start of the
application. The roofing system manufacturer will review the Job Approval form.
C. A PRE-BID CONFERENCE: Shall be conducted one week before bid date. Its purpose shall be to
discuss any details of the project not adequately covered within the specification; to allow bidding
applicators a period of access to the roof areas; and to review the normal flow of activities at the facility.
There will be no other access to the roof area without the consent of the owner's representative. All
bidding applicators must attend this Pre-Bid Conference. A list of those companies present will be
recorded.
D. INSURANCE CERTIFICATION: Assist Owner in preparation and submittal of whatever roof installation
acceptance certification may be necessary in connection with fire and extended coverage insurance on
roofing and associated work. Installation must comply with FMGlobal Class 1 requirements and 1-60 or 1-90
requirements as applicable.
E. PRE-ROOFING CONFERENCE: Prior to installation of roofing and associated work, meet at project site
with general contractor; installer and his project foreman and safety representative; roofing system
manufacturer; installers of related work; Architect; and JCPenney representative. Record discussions and
agreements and furnish copy to each participant.
F. EQUIPMENT: The equipment for the application of the foam shall be as recommended and approved
by the polyurethane foam component manufacturer. The equipment for the application of the silicone
coating shall consist of an airless spray unit recommended or approved by the silicone coating
manufacturer or rollers or power rollers which may be used for one component product.
G. COMPLETED INSPECTIONS: Completed roofing application will be inspected by an independent
inspection firm designated by the warranty provider on a periodic basis.
1.04
PROJECT / ENVIRONMENTAL CONDITIONS:
A. Proceed with roofing work only when existing and forecasted weather conditions will permit work to be
performed in accordance with manufacturer's recommendations and warranty requirements.
B. The following minimum weather conditions must be present at the beginning of the application. If
weather conditions change during the application and the stated conditions are not met the application
must be stopped until such time as all the specified conditions are met. No application may proceed
during inclement weather (rain, snow, fog, mist).
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MASTER CONTRACT SPECIFICATIONS
COATED FOAMED ROOFING 07 57 00
1. For Foam Application
a. The substrate must be free of ice, frost, surface moisture or visible dampness.
b. The substrate and ambient air temperatures must be 50°F or higher.
c. The relative humidity must be low enough to permit the production of foam with good cell
structure. A relative humidity of 80% or lower is preferred. The ambient temperature must not be
within 6 degrees of the dew point at time of SPF application.
d. When wind speeds exceed 10 miles per hour or adversely affects the quality of the SPF,
windscreens shall be used during the application of the polyurethane foam to prevent overspray
onto surfaces not intended to receive foam. Under no circumstances shall the polyurethane foam
be applied when wind speeds exceed 25 miles per hour.
2. For Silicone Coating Application
a. The foam must be free of ice, frost, surface moisture or visible dampness.
b. The air temperature must be 50°F or higher.
c.
The wind velocity must be 15 mph or lower unless a suitable windscreen is used.
d. When wind speeds exceed 10 miles per hour or adversely affects the quality of the SPF,
windscreens shall be used during the application of the silicone coating to prevent overspray onto
surfaces not intended to receive coating. Under no circumstances shall the silicone coating be
applied when wind speeds exceed 25 miles per hour.
1.05
DELIVERY, STORAGE AND HANDLING:
A. Deliver materials to the site in their original, tightly sealed containers, all clearly labeled with
manufacturer's name, product identification, safety information, and batch or lot numbers where
applicable. Provide labeled materials which have been tested and listed by UL for application indicated, for
"Class A" rated material/system, for non-combustible decks.
B. Safely store materials in their original containers out of the weather and where the temperatures are
within the limits specified by the manufacturer.
C. All materials shall be stored in compliance with applicable fire and safety requirements.
D. Protect materials from damage during transit, handling, storage and installation. Applicator shall
provide secure site storage trailers.
1.06
WARRANTY:
A. The SPF Roof System manufacturer's 15-Year Full System Warranty shall be issued upon
completion, inspection and acceptance of the project. Any repairs covered by the warranty are without
cost to the Owner throughout the term. The warranty shall be comprehensive with no proration and no cap
for repairs.
B. The warranty agreement must be presented to the owner or his/her authorized representative for
review and signature prior to the start of any work. The signed warranty agreement should then be
forwarded to and approved by the roofing system manufacturer prior to the start of the application.
1.07
SEQUENCING AND SCHEDULING:
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COATED FOAMED ROOFING 07 57 00
A. All preparation work such as gravel removal, and blasting, priming, vacuuming, etc., must be
completed in the areas adjacent to and within 100 feet of the planned foaming and coating application.
B. The spray polyurethane foam shall be installed when the deck, parapet walls, rough openings, and
curbs are completed. The type of skylights used will determine when skylights should be installed.
Plumbing vents, drains, and electrical penetrations should all be in place.
C. There should not be any trades-people working on the roof when the spray polyurethane foam and
silicone coating are being installed.
D. The work should be planned in order to adhere to the following maximum and minimum time intervals
between application steps.
APPLICATION STEP
MIN. INTERVAL
MAX. INTERVAL
Between foam & Silicone Base Coat
Between Silicone Base & Top Coat
Between Silicone Top Coat &
Granules
1 hour
1hour
-
24 hours
48 hours
5 minutes
SUGGESTED
INTERVAL
Same day
Same or next day
Immediately
PART 2 - PRODUCTS
2.01
GENERAL: Subject to product compliance, provide one of the following seamless roofing
systems.
A. BASF: BASF Elastospray 81305 Series Sprayed-in-place Polyurethane Foam (SPF) Insulation / BASF
S-5000 Silicone Roof Coating
B. General Electric Company/Resin Technology Company: Resin Technology Company Sprayed-in-place
Polyurethane Foam (SPF) Insulation / GE Silicones SCM-3400 Silicone Roof Coating.
C. BASF/Foam Enterprises, Inc. / Premium Foam PF-241 Series or FE–303 Series Sprayed-in-place
Polyurethane Foam (SPF) Insulation / FE- Coat 3000 Series Silicone Roof Coating.
2.02
SUBSTRATE PRIMER:
A. Gypsum board – if kept clean, with little dust, will not require a primer.
B. For B.U.R., concrete, wood, brick, metal (ferrous, not rusted) - option - to be selected by Specifier.
The primer must be as approved by the roofing system manufacturer.
C. For non-ferrous metals (cleaned aluminum, galvanized copper, etc) - a primer shall be required, as
approved by the roofing system manufacturer.
D. Cut-back asphalt primers are not to be used.
2.03
POLYURETHANE FOAM INSULATION:
A. Insulation: The choice of foam to be used shall be based on application conditions (deck and air
temperature), the type of substrate, and must be approved for use in a warranted roof system by the
warranty provider.
B. Actual thickness of insulation shall be such that the coefficient of transmission of the insulation only,
excluding roofing and ceiling construction, shall be as shown in the table below. The aged "R" value shall be
determined in accordance with ASTM 1289-02. The number of degree days shall be as listed in the latest
edition of the National Climatic Data. If location is not listed, use closest listed location.
07 57 00 - 4 Rev. 04/13/12
MASTER CONTRACT SPECIFICATIONS
Greater than 6000 degree days
u=.05 (6 month conditioned R=20)
16.6 LTTR
COATED FOAMED ROOFING 07 57 00
6000 degree days or less
u=.07 (6 month conditioned R=14.3)
12.1 LTTR
C. The cured sprayed-in-place polyurethane foam shall have the following properties:
PROPERTY
Density, pcf, min
Compressive strength, psi
Closed-cell content, percent, min
K-factor, aged, max
Dimensional Stability, 28 days,
158°F, 100% R.H., percent volume change, max
Flame spread, max
2.04
VALUE
3.0
50
95
0.16
+8%
TEST METHOD
ASTM D-1622
ASTM D-1621
ASTM D-2856
ASTM C-518
ASTM D-2126
75
ASTM E-84
SILICONE COATINGS:
A. The silicone roofing membrane shall consist of a minimum two coats of an elastomeric, liquid applied
material, domestically engineered and produced. The two coats shall be of contrasting colors. The
minimum two-coat thickness shall be 25 dry mils. Membrane shall be manufacturer's white color, unless
noted otherwise in the contract documents.
1. The silicone coating will be a product proven through actual roof performance for a period of time
equal to, or longer, than the term of the requested warranty.
2. The manufacturer shall have an established program to rapidly respond to any required warranty
repair, if the original applicator is unable to perform standard repairs.
3. The coating shall have the following minimum properties:
PROPERTY
AS SUPPLIED:
Solids Content
by weight, percent
by volume, percent
Specific Gravity at 77°F (25°C)
Flash Point, Pensky-Martin, closed cup, °F °C, min.
Tack-Free Time, hours
Dry Time, hours
Volatile Organic Content (VOC, g/l)
AS CURED:
Durometer Hardness, Shore A, points
Tensile Strength, die C, psi
Elongation, percent
Permeability1, perms
Water Absorption, percent
Temperature Stability Range, °F(C°)
VALUE
TEST METHOD
77
62
1.23
100 (37.8)
1
3.5
290
ASTM D-2697
ASTM D-2697
ASTM D-1293
45
400
150
3.7
0.5
-35 to 302°
(-37 to 150)
ASTM D-2240
ASTM D-412
ASTM D-412
ASTM E-96
ASTM D-471
Weatherometer,
Carbon-Arc, 4,000 hours
Not observable
QUV, 10,000 hours
degradation
20 mils at 100°F (37.8°C) and 90 percent relative humidity.
07 57 00 - 5
Rev. 04/13/12
ASTM D-115
ASTM D-3960/EPA Method 24
MASTER CONTRACT SPECIFICATIONS
2.05
COATED FOAMED ROOFING 07 57 00
GRANULES:
A. Granules shall be number 11 screen size, ceramic-coated roofing granules, as approved by roofing
system manufacturer. Color to best match topcoat. Quartz or silica aggregate such as #2 unground silica
may be used as an acceptable alternative. This product will have natural color variations, color should be
selected to match topcoat.
B. The use of granules is required for all applications unless an exemption is approved by the roofing
system manufacturer.
2.06
SEALANT: If silicone sealants or caulking are required for detail work or to seal the surface after
samples are taken, shall be as approved by the roofing system manufacturer. The color of this sealant, if
exposed, shall closely match that of the topcoat.
2.07
PROTECTIVE COVERING / WALKWAYS: Weather-resistant, breathable, resilient pad
composed of synthetic rubber strands shall be installed to create additionally protected roof areas. This
product shall be as approved by the roofing system manufacturer.
2.08
ACCESSORIES AND MISCELLANEOUS MATERIALS:
A. All accessories and miscellaneous materials, such as but not limited to, flashings, drain flashings,
flashing accessories, primers, sealants, etc must be compatible with the silicone and foam materials and
shall be as approved by the roofing system manufacturer. Accessories made of polyethylene and
polypropylene should not be used.
B. For products requiring the use of a primer for maximum bonding, consult the roofing system
manufacturer for recommendation regarding compatibility.
C. BOARD STOCK: Only types of boardstock approved by the roofing system manufacturer shall be
used. When boardstock is used, it may be necessary to install an asphalt base sheet before application of
the foam. See the roofing system manufacturer for requirements.
D. When required, asphaltic base sheets shall be 43-pound asphalt saturated and coated organic base
sheet. Lighter base sheets must not be used.
D. ISO BOARD: Shall be a closed-cell, polyisocyanurate foam core integrally laminated to heavy, black
(non-asphaltic) glass fiber reinforced felt facers, as approved by the roofing system manufacturer.
Expanded polystyrene boardstock should not be used under any circumstances.
E. MEMBRANE FASTENERS: STEEL DECK: Corrosion-resistant, self-tapping, self-drilling screw with low
profile head and corrosion-resistant, factory-made plate as approved by roofing system manufacturer.
1. Screw and plate type fastener to be FMGlobal approved.
2. Fasteners to be of sufficient length to penetrate top flange of deck by 3/4".
F. NAILERS: Nailers are to be #2, or better, and pressure treated with a salt preservative. Wolmanized
treatment is approved. Asphaltic or creosote preservatives not permitted.
PART 3 – EXECUTION
3.01
INSPECTION:
A. Verify all surfaces to receive polyurethane foam insulation are clean, dry and free of dust, dirt, debris,
oil, solvents and all materials that may adversely affect the adhesion of the polyurethane foam.
B. Verify all roof penetrations and flashings are properly installed and secured. The metal roof deck shall
be securely fastened. The existing fasteners may need to be tightened and/or new fasteners shall be
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COATED FOAMED ROOFING 07 57 00
required.
C. Do not begin applying polyurethane foam insulation until substrate and environmental conditions are
satisfactory.
3.02
SURFACE PREPARATION:
A. Built-Up Roof Membrane
1. Remove all loose and poorly imbedded aggregate surfacing material, if present, by use of a wet
vacuum, power broom, hand broom, power vacuum, and/or other suitable means. Do not accumulate
large amounts of aggregate surfacing material in one location that may overload the roof deck
structure.
2. Remove all wet insulation under existing built-up roof membrane. Clean and dry the area and
install new similar compatible insulation, or apply polyurethane foam insulation to the level of the
adjacent existing membrane.
3. Repair all built-up roof membrane defects, such as blisters, ridges, splits, punctures and felt
delaminations, by cutting, removing, nailing or properly adhering to form a solid substrate. BUR
repairs shall be made using hot process BUR or modified bitumen products, cut-back products shall
not be used. Make sure the adjoining roof materials around these defects are dry.
4. Remove all loose stones, dust, dirt, debris and other contaminants from the built-up roof
membrane that may impair the adhesion of the polyurethane foam.
5. Primer: Install primer per roofing system manufacturer's recommendations. Make sure all
surfaces are clean and dry prior to primer and/or polyurethane foam application.
B. Metal Decks
1. The metal roof deck should be a minimum of 22-gauge and be securely installed to conform to
local building code requirements. Deflections shall not exceed 1/240 of the span.
2. Remove any loose scale, rust and weathered or chalking paint using a wire brush, scraper, sand
blasting or other suitable means. Prime if necessary and as recommended.
3. Remove all dust, dirt and debris using air, a hand or power broom and/or a power washer. Other
contaminants such as oil and grease must be removed with appropriate cleaning solution, and rinsed
with clean water. (New metal will have a thin film of milling oil on it, which must be removed.)
4. Fluted metal roof decks should be covered with a polyester tape securely adhered to the metal
deck over the flutes, or by mechanically fastened gypsum, urethane, perlite or fiberglass board per
FMGlobal recommendations for local wind uplift resistance. The boards shall be firmly butted together
along all edges. Any joints greater than ¼ inch shall be taped prior to foam application.
5. Factory painted metal surfaces will not normally require an additional application of primer.
6. Make sure all surfaces are clean and dry prior to foam application.
C. Concrete Surfaces
1. The concrete shall be cured a minimum of 28 days at temperatures above 50°F and must be free
of any laitance.
2. Remove all loose dirt, dust and debris using air pressure, a hand or power broom and/or a
vacuum. Oil, grease, release agents and other contaminants must be removed using the appropriate
cleaning solution.
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COATED FOAMED ROOFING 07 57 00
3. All joints or cracks greater than ¼ inch shall be caulked or grouted prior to polyurethane foam
application.
4. Make sure all surfaces are clean and dry prior to application of an approved primer and
polyurethane foam application.
5. Lightweight concrete insulating, fill material: If present in the existing roof assembly,
recommendations will be made on a per job basis, contact the roofing system manufacturer for
specific requirements.
D. Wood Surfaces
1. Plywood shall be exterior grade not less than ½ inch thick, nailed firmly in place. Attachment must
meet building code requirements for resistance to wind uplift. Deflections should not exceed 1/240 of
the span.
2. The plywood shall contain no more than 18 percent moisture by weight, as measured in
accordance with ASTM D-2016.
3. All untreated and unpainted surfaces shall be primed with an appropriate, approved primer to
minimize moisture absorption and aid in the polyurethane foam adhesion.
4. Tongue-and-groove sheathing and planking decks shall be overlaid with a minimum of ¼-inch
exterior grade plywood, insulation board or a base sheet securely attached to meet building code
requirements.
5. Any joints greater than ¼ inch shall be caulked or taped prior to the polyurethane foam
application.
6. Remove all loose dirt, dust and debris using air, a hand or power broom and/or a vacuum. Power
washing is not recommended as it may introduce water into the substrate. Oil, grease and other
contaminants must be removed using appropriate cleaning solution. Severely contaminated wood
substrates shall be removed and replaced.
7. Ensure all surfaces are clean and dry prior to polyurethane foam application.
E. Metal Decks / New Construction:
1. The metal roof deck should be a minimum of 22-gauge and be securely installed to conform to
local building code requirements.
2. Insulation to be loosely laid to deck with all joints staggered and tightly butted. Insulation to fit tightly
around projections.
3. Securely fasten the gypsum board and 1½", 25 psi minimum ISO board over the metal deck with
screw and plate type fasteners at spacing recommended by roofing system manufacturer but in no
instance shall spacing of fasteners be less than FMGlobal, UL or building code requirements. Provide
double layer insulation when requirements of roofing system and roofing system manufacturer dictate.
4. Ensure that fasteners do not penetrate conduit or miscellaneous piping which may be located in the
deck.
5. Do not install more insulation each day than can be covered and sealed against moisture penetration
before end of day and before start of inclement weather.
6. Nailers:
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COATED FOAMED ROOFING 07 57 00
a. Perimeter nailer: Install a wooden nailer at the perimeter of each roof level, curb flashing,
skylights, expansion joints and similar penetrations if required by the roofing system manufacturer.
b. Wood nailers shall be firmly anchored to resist a force of 175 pounds per lineal foot in any
direction. The thickness of the nailer shall be such that the top of the nailer is flush with the surface
to which the membrane is attached at the horizontal plane, or as shown on manufacturer's approved
details. Nailers must be at least 1/2" wider than the metal flanges installed over them.
c. Fasteners to be spaced a maximum of 24" o.c. for nailers with a minimum thickness of 2"
nominal and 12" o.c for nailers with less than 2" nominal thickness. Fasteners to be staggered 6”
o.c. within 8’ of the outside corner.
d. Nailers are to be installed with joints true and tight. Allow 1/4" gap between board for expansion.
7. Flashings:
a. Install flashings and similar accessory items as required by manufacturer even though not
shown.
b. Install flashings in strict accordance with roofing system
recommendations and details.
manufacturers
published
8. Expansion Joints: Install expansion joints as shown on drawings and in accordance with
manufacturer's recommendations.
9. COPING SYSTEM, ROOF HATCH: Except as otherwise indicated, comply with manufacturer's
installation instructions and recommendations, and with SMACNA "Architectural Sheet Metal Manual."
Anchor units of work securely in place by methods indicated, providing for thermal expansion of metal
units; conceal fasteners where possible, and set units true to line and level as indicated. Install work with
joints and seams which will be permanently watertight and weatherproof.
10. UNDERLAYMENT: Install accessory slip sheet and underlayment in strict accordance with roofing
system manufacturers published recommendations and details.
11. Unusual Penetrations: Clusters of pipes and unusual shaped penetrations shall be sealed as
recommended by manufacturer.
12. Make sure all surfaces are clean and dry prior to primer/foam application.
F. Other Surfaces: Contact roofing system manufacturer for recommendations on surface preparations
on other surfaces.
3.03
POLYURETHANE FOAM APPLICATION:
A. Inspection:
1. Prior to polyurethane foam application, inspect the substrate surface to ensure preparations
required in Section 3.02 have been met.
2. Polyurethane foam shall not be applied unless the environmental requirements of Section 1.07
are met.
B. Application:
1. All objects that require protection from overspray shall be protected all mobile objects shall be
moved to an acceptable area. All intake air vents shall be turned off and covered.
2. Apply the polyurethane foam in strict accordance with the polyurethane foam manufacturer's
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COATED FOAMED ROOFING 07 57 00
specifications and application instructions using spray equipment recommended by the SPF
manufacturer. The field of the roof shall be applied, as practical, by a robotic SPF application device.
The robotic method shall improve consistency, slope-to-drain, and visual appearance.
3. Polyurethane foam shall be applied in a minimum of ½-inch thick passes. The total thickness of
the polyurethane foam shall be a minimum of 1½ inches, except where tapering is required to facilitate
drainage.
4. Apply the full thickness of polyurethane foam in any area on the same day.
5. Polyurethane foam shall be applied to ensure positive drainage, resulting in no ponding water.
Ponding water is defined as "an area of 100 square feet or more, which holds in excess of ½ inch of
water as measured 24 hours after rainfall."
6. The polyurethane foam shall be terminated neatly a minimum of 4 inches above the finished roof
surface at roof penetrations. Sprayed-in-place cants shall be applied to allow a smooth transition from
the horizontal to vertical surface.
7. The finished polyurethane foam surface texture shall be "smooth to orange-peel", free of voids,
pinholes and depressions. "Verge of popcorn" texture is acceptable if it can be thoroughly and completely
coated. Popcorn and tree bark textures are not acceptable. Unacceptable SPF textures shall be
removed and re-sprayed prior to the coating application.
3.04
SILICONE ROOF COATING APPLICATION:
A. Inspection:
1. Prior to the application of silicone coating, inspect the polyurethane foam surface to ensure the
conditions of Section 3.03 have been met.
2. The polyurethane foam surface shall be free of moisture, dust, dirt, debris and other contaminants
that would impair the adhesion of the silicone coating.
3. If more than 24 hours elapse between the polyurethane foam application and the start of the
silicone coating application, thoroughly inspect the polyurethane foam surface for UV degradation and
oxidation. Call the roofing system manufacturer’s technical department for procedures to proceed, if
UV degradation has affected the SPF.
4. Make sure all environmental conditions of Section 1.06 are met prior to silicone coating
application.
B. Application
1. Apply the silicone roof coating in strict accordance with the manufacturer's specifications and
application instructions. Manufacturer’s dark gray shall be used as the basecoat color on the
polyurethane foam.
2. The silicone basecoat shall be applied on the same day as the polyurethane foam application,
after the polyurethane foam has been allowed to cure a minimum of one hour.
3. Apply the basecoat in a uniform application to achieve a finished dry film thickness of
approximately ½ the total thickness required for the roof.
4. The basecoat shall not be subjected to foot traffic or otherwise disturbed until it is tack-free.
5. After it has cured, inspect the coating for pinholes, cracks, thin areas or other defects. All defects
observed shall be caulked with silicone sealant and/or roller coated with additional basecoat prior to
applying subsequent coats of silicone.
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6. The basecoat and sealant must be cured, clean and free of all moisture prior to application of
topcoat.
7. Apply the topcoat in a contrasting color to the basecoat within 72 hours of the basecoat
application. The topcoat application shall be made at right angles to the basecoat application. Surface
texture and conditions may require additional quantities of silicone to insure proper thickness. It is the
applicator's responsibility to properly coat the insulation regardless of the quantity of silicone coating
necessary.
8. Apply the topcoat in a uniform application to achieve a minimum total finished dry film thickness of
the basecoat and topcoat of 25 mils.
9. The silicone roof coating shall be applied a minimum of 2 inches beyond all the terminated edges
of the polyurethane foam. These terminations should be masked to provide a straight edge, neat,
finished appearance.
10. Allow the topcoat to cure and inspect the finished coating surface for pinholes, cracks, thin areas,
or other defects. Repair any defects observed with silicone sealant and/or additional silicone coating
material.
11. It is the applicator's responsibility to ensure the minimum total dry film thickness specified is
achieved throughout the entire roof area regardless of the quantity of silicone coating required.
3.05
GRANULE APPLICATION:
A. Apply roofing granules in a wet finish coat of silicone coating. A minimum of 10 dry mils of silicone
coating is required to hold the granules.
B. Apply the roofing granules, using suitable compressed air equipment, uniformly at a rate of
approximately 40 pounds per 100 square feet of roof area.
C. Apply the roofing granules immediately after the additional coating application to obtain maximum wetout and imbedment.
D. After the coating has fully cured, all loose granules shall be removed using a soft-bristled broom to
prevent blocking drains and scuppers.
E. Bare spots in the granulated surface shall be filled in, by applying additional coating and granules in
these areas.
3.06
WALKWAYS: Factory-formed walkway pads may be used at rooftop equipment to provide a
working surface. Spot adhere the pads or rolls to the finished roof surface with generous buttons of
sealant. Refer to contract documents for placement.
3.07
FIELD QUALITY CONTROL:
A. INSPECTION: In progress visits including written reports (initial visit at start of installation and final
inspection upon completion of the installation) shall be made by a representative of the roofing system
manufacturer to ascertain that the roofing system is being installed according to manufacturer's published
specification and details.
B. The applicator shall submit to the owner's representative a listing of any deficient roof areas, such as:
ponding, wet insulation, deck problems, required new drains, etc.
C. Core samples of the silicone roof system will be secured at completion by an independent licensed
inspection firm at a rate of one core per 10,000 square feet with a minimum of 2 cores per roof to test for
SPF thickness, compressive strength, density and adhesion. Additionally, slit samples will be taken at a
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MASTER CONTRACT SPECIFICATIONS
COATED FOAMED ROOFING 07 57 00
rate of 3 per 10,000 square feet, with a minimum of 6 per roof, to test the coating thickness and coating
adhesion. Sampled areas will be repaired using silicone sealant and replacement SPF cores.
D. Applicator's quality control during application shall consist of the following, as a minimum:
1. If specified, the primer application rate shall be verified by a wet mil gauge test onto a metal test
panel.
2. Insulation thickness shall be verified with a probe at frequent and random locations.
3. Thickness and adhesion of the insulation shall be examined by removing cores at a rate of 1
every 10,000 feet.
4. After and during coating application, the applicator shall remove slits to examine adhesion of the
coating to the insulation and the dry millage of applied silicone coating.
3.08
SAFETY REQUIREMENTS:
A. Proper safety precautions shall be followed throughout the entire roofing operation. OSHA and local
regulations shall be strictly followed. Manufacturer’s Material Safety Data Sheets must be available on
site, for specific safety information on handling and working with all materials. Spray Polyurethane Foam
Alliance of the American Plastics Council’s Recommendations for the Safe Handling and Use of Sprayed
Urethane Foam and Coating Materials shall be strictly adhered to. Dispose of all trash, debris and empty
containers in accordance with local regulations.
B. On roof and at all work sites, a fire extinguisher will always be available.
3.09
FOLLOW-UP INSPECTIONS: The system manufacturer shall have a standard warranty
inspection program, employing an independent testing firm to perform periodic inspections throughout the
term of the warranty.
3.10
CLEANUP: All debris shall be removed from the premises promptly and the construction area left
clean daily.
END OF SECTION
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