SILICONE ROOF COATING RESTORATION (RCR) SYSTEM OVER SILICONE COATED ROOF

Part 1. General Conditions
1.01 Description
A. Scope of Work
Provide all materials, labor and equipment required for the installation of the RCR System over the
existing silicone coated roof including all ancillary products.
B. Related Work
1. Perform Moisture Survey
2. Replace Wet Insulation
3. Repair All Sheet Metal Defects
4. Repair All Flashing Defects
5. Surface Preparation
6. Perform Adhesion Tests
7. Install Silicone RCR Membrane
8. Install Walkway Systems
1.02 Performance Requirements
A. Conform to applicable code for fire resistance ratings of roof system.
B. Underwriters Laboratories, Inc. - UL 790: Class A Fire Hazard Classification.
C. Factory Mutual (FM) – FM Standard 4470 approval
D. All silicone products must be domestically produced. Products produced outside of the US will not
be accepted.
E. Coating manufacturer must produce its own product. Private labeled silicone coating products will
not be accepted.
1.03 Submittals
A. Product Data: Product data on silicone coating, physical and chemical properties, preparation of
substrate required, product limitations, and cautionary requirements.
B. Safety Data Sheets (SDS)
C. Shop Drawings: Roof plan and details showing extent of roofing, intersections with adjacent
surfaces, and details of expansion joints, counterflashing, and other items for a complete roofing
system.
D. Manufacturer's Installation Instructions: Indicate installation requirements and procedures.
E. Certificates:
1. Product certificates signed by the manufacturer certifying material is in compliance with the
specified performance characteristics and criteria, and physical requirements.
Recommended Design Specification
RCR ROOFING SYSTEM - OVER SILICONE COATED ROOF 07545-2
F. Sample copy of PM warranty
G. Maintenance Data: For RCR System to include in maintenance manuals.
H. Final Inspection Report: Copy of roofing system manufacturer’s inspection report of completed
roofing installation.
1.04 Quality Assurance
A. Manufacturer:
1. Company specializing in the manufacturing of the system specified in this Section.
2. A minimum of 10,000,000 square feet of a similar system installed.
B. Installer:
1. Installer must be a Certified Licensed Applicator (CLA) by the Manufacturer providing the
warranty, and is capable of receiving the specified warranty.
2. CLA to ensure all personnel are properly trained and have a full understanding of all OSHA
safety requirements.
C. Manufacturer Field Representative: Provide a qualified representative of the Manufacturer
providing the warranty to monitor and periodically inspect the installation.
1.05 Delivery, Storage, and Handling
A. Deliver and store liquid materials and other products in their original unopened containers or
packaging until ready for installation.
B. Materials shall be clearly labeled with the manufacturer’s name, product identification, safety
information, and lot numbers.
C. Store materials indoors whenever possible.
D. Protect stored products from freezing.
E. Comply with the manufacturer’s instructions for handling and safety procedures.
F. Store and dispose of solvent-based materials, and materials used with solvent-based materials, in
accordance with requirements of local authorities having jurisdiction.
1.06 Environmental Requirements
A. Maintain logs of environmental conditions (temperature, humidity, and wind speed) within limits
recommended by manufacturer for optimum results. Do not install products under environmental
conditions outside of manufacturer’s limits.
B. Weather Limitations: Proceed with installation only when existing and forecasted weather
conditions permit roofing system to be installed according to manufacturer’s written instructions
and warranty requirements.
C. Do not install silicone coating under the following conditions:
1. When ambient temperature is below 35° F.
2. At temperatures less than 5° F above dew point.
1.07 Warranty
A. Provide Manufacturer’s (5, 10, 15 or 20 year) labor & material warranty covering leaks due to
silicone material failure.
Recommended Design Specification
RCR ROOFING SYSTEM - OVER SILICONE COATED ROOF 07545-3
Part 2. Products
2.01 Acceptable Products
A. Insulation Board
1. Match existing material
B. Butyl Fleece Tape
1. Progressive Materials: FT 500 Butyl Fleece Tape
C. Cleaners and Primers
1. Progressive Materials: P-100 General Purpose Primer
D. Silicone Caulk Sealant
1. Progressive Materials: SS 300 Series Silicone Sealant
E. Flashing Grade Sealant
1. Progressive Materials: FG 400 Silicone Flashing Grade Sealant
F. Reinforcing Fabric
1. Progressive Materials: PF 200 Polyester Fabric
a. PF 206 – 6”
b. PF 212 – 12”
G. Moisture Relief Vents
1. Progressive Materials: MRV 600 One-Way Roof Vent
H. Walkway System
1. Progressive Materials: Pro-Grip Walkway System
a. PG 700 Pro-Grip Yellow Walkway Coating
b. PG 750 Pro-Grip Yellow Walkway Granules
I. Skylight Sealer
1. Progressive Materials: HS 3220 Clear Silicone Skylight Coating
J. Silicone Coating
1. Progressive Materials: Pro-EcoSil HS 3200 Series
2.02 Silicone Coating Materials
A. Silicone base and top coat to be Pro-EcoSil HS 3200 Series Silicone Coating by Progressive Materials,
LLC and complying with the following minimum properties:
1. Tensile Strength: ASTM D412, 247.
2. Elongation: ASTM D412, 237 percent minimum at break at 75° F.
3. Water Vapor Permeance: ASTM D-96, 10.7 at 20 mils.
4. Fire resistance: ASTM E108, UL 790 Class A.
5. Color: Owner to select standard topcoat color.
6. Solids Content: 92% ±3%
7. VOC Content: < 50 grams/liter
8. Initial Solar Reflectivity: .89
9. Initial Thermal Emissivity: .90
10. SRI Value: 113
Recommended Design Specification
RCR ROOFING SYSTEM - OVER SILICONE COATED ROOF 07545-1
Part 3. Execution
3.01 Examination
A. Verify roof slope prior to beginning installation. There is to be no single area of standing water on
the roof 24 hours after a rain, greater than 100 sq. ft. and more than ½” deep.
B. Perform infra-red thermal scan of roof to identify any wet insulation.
C. Identify all seam failures, flashings failures and inadequate sheet metal details.
D. Inspect all roof drains to ensure proper performance.
E. Inspect all roof system fasteners for back out.
3.02 Preparation
A. Existing Coating Cleaning:
1. Thoroughly powerwash roof surface and all other areas to receive new coating with a minimum
of 2,000 psi water pressure. Be sure not to damage existing coating during this process.
2. After the surface has dried, perform an adhesion test. If the coating does not properly adhere to
the surface, consult manufacture for recommendations.
3. Any areas of grease contamination are to be cleaned with an industrial strength detergent.
B. Existing Wet Insulation Areas:
1. Roof areas containing moisture below the roof surface shall either be replaced, or for areas less
than 500 sq. ft. with moderate moisture content, a moisture relief vent shall be installed.
a. Wet Insulation Replacement (wet area is greater than 500 sq. ft.)
1) Cut existing coating on four sides and remove.
2) Remove underlying roof substrate to expose wet insulation.
a) Ensure that the area of substrate removed is less than the area of coating
removed.
b) If substrate is a membrane system, cut three sides of membrane and fold back to
expose wet insulation.
3) Remove and replace insulation with identical insulation materials. Fasten new
insulation at a rate of 1 fastener per 2 square feet.
4) For membrane substrates, fold original membrane back over top of the new insulation.
a) Membrane cuts are to be fastened with barbed membrane seam fasteners
staggered 6” o.c.
b) Install 20 mils of HS 3200 coating approximately 16” wide centered over
membrane cuts.
c) Install 12” wide PF 212 Polyester Fabric into the wet coating. Smooth out fabric
and ensure there are no wrinkles or fishmouths.
d) Install another coat of HS 3200 at a rate of approximately 20 mils over new
fabric.
5) Apply 20 mils of HS 3200 over the exposed substrate.
b. Moisture Relief Vent Installation (wet area is less than 500 sq. ft.)
1) Locate center of moisture-containing insulation.
Recommended Design Specification
RCR ROOFING SYSTEM - OVER SILICONE COATED ROOF 07545-2
2) Cut a 4” diameter opening through the coating, membrane and insulation material;
remove material to vapor barrier or deck.
3) Lay the MRV 600 Roof Vent on top of roof membrane and attach vent to the roof deck
with the appropriate fastener. Install 4 fasteners per vent, evenly spaced.
4) Clean area of vent that is to receive flashing material with clean rag and solvent to
remove oil film from vent.
5) Flash in vent with one of the two following procedures:
a) Apply a 3 course coating and fabric utilizing the PF 200 Polyester Fabric and HS
3200 Silicone Coating.
(1) Apply 12 to 15 mils of silicone coating over surface to receive fabric.
(2) Embed fabric into silicone coating while still wet. Fabric should extend at
least 2” on to the flange of the vent and at least 4” on to the roof surface.
(3) After the base coating has cured, apply a generous coat of silicone coating
over the fabric to ensure complete saturation.
C. Flashings Details: Ensure all existing flashings provide a watertight condition. If necessary, re-flash
any areas required utilizing a 3-course fabric-coating-fabric method.
D. Coating Failures: Repair all existing coating failures by cleaning the area around the failure and
installing 25 mils of HS 3200 Silicone Coating over failure.
E. Sheet Metal: Ensure all sheet metal is in good condition and will provide a watertight condition. If
necessary, replace or repair any sheet metal required.
3.03 Silicone Coating Installation
A. Ensure surface is completely dry.
B. Ensure subsequent coats of primer or silicone coating is completely cured.
C. Ensure adhesion tests have been completed and results are satisfactory with the manufacturer’s
requirements.
D. Install silicone coating in one pass over entire roof surface at a rate of:
1. 20 mils minimum for a 5 year warranty
2. 25 mils minimum for a 10 year warranty
3. 30 mils minimum for a 15 year warranty
4. 35 mils minimum for a 20 year warranty
E. While spraying the silicone coating, special effort should be made to have pass lines overlap on
membrane seams as to provide additional coating thickness on the seams.
F. It is strongly recommended that the coating should be applied with a roller at all edges and
penetrations to prevent overspray and provide a clean straight edge.
G. NOTE
1. Any subsequent membrane repairs after the coating installation should be done only with
silicone products. If needed, repairs should be completed with a three course coating and
fabric.
3.04 Walkway System
A. Install the Pro-Grip Walkway System at heavy traffic areas and at high impact areas as directed by
the owner.
Recommended Design Specification
RCR ROOFING SYSTEM - OVER SILICONE COATED ROOF 07545-3
1. Walkway Areas
a. Walkways should be a minimum of 30” wide.
b. Mask off area to receive walkway system to ensure clean, straight edges.
c. Install PG 700 Pro-Grip Yellow Walkway Coating at a thickness of 25 mils.
d. Immediately after the application of the PG 700, broadcast PG 750 Pro-Grip Walkway
Granules into the coating at a rate of 40 lbs. per 100 square feet. The granules will settle
into the coating. Apply the granules generously, inspect the surface within a few minutes
and reapply as needed to obtain a continuous film of granules.
2. High Impact Areas (around mechanical equipment, etc)
a. Mask off area to receive walkway system to ensure clean straight edges. Area should be
30” wide around all identified equipment.
b. Install PG 700 Pro-Grip Yellow Walkway Coating at a thickness of 40 mils.
c. Immediately after the application of the PG 700, broadcast PG 750 Pro-Grip Walkway
Granules into the coating at a rate of 60 lbs. per 100 square feet. The granules will settle
into the coating. Apply the granules generously, inspect the surface within a few minutes
and reapply as needed to obtain a continuous film of granules.
B. After the coating has completely cured, remove all loose granules with a small hand blower and a
soft bristle broom.
3.05 Field Quality Control
A. Final Roof Inspection: Arrange for roofing system manufacturer’s technical personnel to inspect
roofing installation upon completion and submit report to Owner/Architect. There shall be no
items on the roof that could inhibit the inspection process, such as, solar panels, decking systems,
etc.
1. Notify Owner 48 hours in advance of date and time of inspection.
a. Repair or remove and replace components of roofing system where inspection results
indicate that they do not comply with specified requirements.
3.06 Cleaning
A. Remove overspray from adjacent surfaces using cleaning agents and procedures recommended by
manufacturer of affected construction.
B. In areas where finished surfaces are soiled by work of this section, consult manufacturer of surfaces
for cleaning advice and conform to their instructions.
C. Repair or replace defaced or disfigured finishes caused by work of this section.
3.07 Protection of Finished Work
A. Ensure roof surface is free of traffic for minimum of 12 hours after silicone coating application or
until coating is completely cured.
B. Ensure any subsequent work does not cause damage to finished roof system. If necessary, install
protection over finished roof area.