Each job must be approved by American WeatherStar before the project begins to be eligible for a warranty.

PART 1 — GENERAL

1.01 DESCRIPTION

A.   The intention of this specification is to outline the procedures for the application of WeatherStar Coatings reflective roof coatings for the purpose of coating Metal Roof surfaces. These suggested specifications describe materials, methods and conditions necessary for the proper application of WeatherStar Coatings. Actual application requirements may vary and are the responsibility of the contractor.

B.   This specification may not outline all procedures for preparation and finishing of penetrations, drains, flashings, etc. This work should be outlined separately by the contractor before the work commences and shall be performed observing good trade practices.

1.02 APPROVED APPLICATOR

A.   All WeatherStar Coatings products shall be applied by a single, experienced and competent Approved Applicator or applicator approved by WeatherStar Coatings.

B.   Contractor shall be an Approved Applicator of WeatherStar Coatings and doing business under the same company name. Financial stability shall include no filing of bankruptcy during the past seven years.

Part 2 — PRODUCTS

2.01 Coatings and Related Materials

All Materials used shall be manufactured by and or approved by WeatherStar Coatings and shall meet the following specifications.

2.02 Elastomeric Coating System

Acrylic 211
Type: Solar reflective coating
Viscosity: 4500 cps
Elongation: 225%
Tensile Strength: 225 psi
Density: 1 0.6 ± 2 lbs./gal.
Volume Solids: 58% ± 2% by weight
Color: White

Pure Polyurea 550
Type: Two component pure polyuria
Volume Solids: 100%
Color: Light Gray

Epoxy Primer 9500
Type: Two Component Water-Based Epoxy Primer
Viscosity: 30-50 cps
Volume Solids: 44%
Color: Light Tan

2.03 Delivery and Storage

A.   Materials shall be delivered in their original, tightly sealed containers or unopened packages, all clearly labeled with the manufacturer's name, file number, and batch numbers.

B.   Materials shall be stored out of the weather in their original tightly sealed containers or unopened containers as recommended by the manufacturer.

2.04 WARRANTY

A.   American WeatherStar warrants that the material supplied will meet or exceed physical properties as published. The contractor guarantees that workmanship will be free of defects in coating application. Since performance of existing roof substrate or previously applied coatings are beyond the control of American WeatherStar or the contractor, requests for additional warranty coverage shall be subject to prior approval by American WeatherStar.

B.   Comply with manufacturer's warranty application procedures. A Pre-Project Inspection Report should be submitted and approved prior to job commencement.

C.   Protection of building and occupants: All surfaces not to receive system specified shall be protected from overspray hazard, i.e. windows, doors, exterior and vehicles. Protective coverings shall be secured against wind and shall be vented if used in conjunction with applications preventing collection and moisture.

part 3 — installation

3.01 SURFACE PREPARATION

A.   Preparation shall include all requirements specified by American WeatherStar to ensure proper adhesion of the American WeatherStar products to the substrate. (An adhesion test may be necessary.) New galvanized metal surfaces must be allowed to cure a minimum of 90 days prior to application or treated with approved surface conditioners by the manufacturer.

B.   Preparation shall include, but not be limited to the following:

1.   All unnecessary and non-functional equipment and debris shall be removed from the roof.

2.   Substrate must be pressure-washed (TSP is recommended). A minimum working pressure of 3,000 psi shall be used to remove all dirt, dust, previous paints and coatings which are delaminating and waste products (oil, oil‑based roof cements, solvents, grease, animal fats, etc.). Roto-spray tip is recommended to expedite metal panel cleaning. Power vacuuming, brooming, high-pressure air or water washing or any combination that assures a clean surface may be used. Any scaly rust must be mechanically removed.

3.   HVAC condensate drains shall be properly routed to roof drains to allow roof membrane and coatings to properly drain and dry.

4.   All roof penetrations, curbs, vent stacks and related roof penetrations are to be flashed in accordance with roof manufacturer's specifications. All laps and wall flashings are to be repaired in accordance with roof manufacturer's specifications.

5.   Contractor shall make every effort to mechanically eliminate all ponding water areas on the roof surface prior to application of any roof coating product.

3.02 PRIMER APPLICATION

A.   Examine substrate to receive roof coating. Do not proceed with installation of the WeatherStar Coatings roof coating until all problem areas have been corrected in a manner acceptable to the manufacturer.

B.   Treatment of Residual Asphalt: Installer shall make every effort to remove all loosely adhered asphaltic roofing elements. Removal efforts must include the use of pressure-washers, scrapers, wire brushes, wire-wheels, or other similar tools.

C.   All areas with rust, previously coated, or factory painted must be prime coated with Epoxy Primer 9500 at an approximate rate of 1 gallon per 200 square feet.

3.03 system APPLICATION

A.   Curb Flashings: All curb flashings, including cricket details, must be flashed with at least a 6" – 12" layer of Polyurea 550 at a minimum of 64 dry mils

B.   Fasteners & Gutter Straps: All fasteners must be re-tightened, all stripped fasteners must be replaced with larger diameter fasteners, and the area re-secured by adding a new fastener next to the one that was stripped. All missing fasteners must be replaced. All fasteners must be totally encapsulated with Polyurea 550. Gutter straps that are fastened above roof panels must be totally encapsulated with Polyurea 550 including the fasteners.

C.   Gaps: All large or excessive gaps existing between roof panels must be closed or made flush with self-drilling fasteners.

D.  Horizontal Seams: Apply a 6" – 12" wide layer of Polyurea 550 at 64 dry mills to completely seal the seam to where it is not visible.

E.   Vertical Seams: Apply a 6" – 12" wide layer of Polyurea 550 at 64 dry mills to completely seal the seam to where it is not visible.

F.   Penetrations: All penetrations must be flashed with at least a 6" – 12" layer of Polyurea 550 at a minimum of 64 dry mils.

G.  Rakes: All fixed rake details for the roof must be secured and sealed . Rakes must be flashed with at least a 6" – 12" layer of Polyurea 550 at a minimum of 64 dry mils. Extra fasteners may need to be added before detail is applied to ensure a water-tight rake.

H.   Ridge Caps: must be flashed with at least a 6" – 12" layer of Polyurea 550 at a minimum of 64 dry mils. Extra fasteners may need to be added before detail is applied to ensure a water-tight rake.

3.04 COATING APPLICATION:

A.   POLYUREA 550

Apply one coat of Polyurea 550 at 2 gallons per 100 sq. ft. Dry film thickness shall be approximately 28-30 mils. A stretch factor of 15% should be used as an average to determine actual metal square footage.

B.   ACRYLIC 211

1.   BASE COAT: Apply base coat of Acrylic 211 metal roof coating at a rate of 100 square feet per gallon. Base coat shall be applied perpendicular to the ribs of the metal roofing. Dry film thickness shall be approximately 9 mils. A stretch factor of 15% should be used as an average to determine actual metal square footage.

2.   TOP COAT: Apply final coat of Acrylic 211 metal roof coating at a rate of 100 square feet per gallon. Finish coat shall be applied parallel to the ribs of the metal roofing. Dry film thickness shall be approximately 9 mils per coat. Total thickness of Acrylic 211 is to be approximately 18 dry mils.

C.   Each coat must be allowed to dry for 24-48 hours depending on humidity and temperature. The roof is to be inspected for defects, flaws or holidays and repaired if necessary.

NOTE: Acrylic 211 can be substituted with AWS Acrylic 211 HT or Ceramic Acrylic 212.

3.05 RESTRICTIONS / LIMITATIONS

This system is to be used only in conjunction with commonly accepted roofing standards but not limited to the following:

A.   No application of materials shall commence during inclement weather or when precipitation is imminent.

B.   No materials are to be applied to wet, dirty, or frozen surfaces.

C.   In conjunction with the final inspection, all debris, containers, materials and equipment are to be properly removed from the job site. Grounds are to be cleaned, undamaged, and acceptable to the owner.

D.  Reflectivity of coatings may be reduced if roof surface is not cleaned on a regularly scheduled basis.

CAUTION: Do not apply within two hours of sunset, rain, fog or freezing temperatures. WeatherStar Coatings must be completely dry before exposing to water or foot traffic. Keep WeatherStar Coatings containers covered when not in use. Dispose of all containers in accordance with state and local environmental regulations. Keep away from children. If ingested, DO NOT induce vomiting. Call Physician immediately.