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 American WeatherStar Coatings reflective roof coatings for the purpose of DensDeck/SecuRock surfaces. These suggested specifications describe materials, methods and conditions necessary for the proper application of American 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 American WeatherStar Coatings products shall be applied by a single, experienced and competent Approved Applicator or applicator approved by American WeatherStar Coatings.

B.   Contractor shall be an Approved Applicator of American 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 American 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

BUTYL 310
Type: Solar reflective coating
Viscosity: 2000-2500 CPS
Elongation: 900% (ASTM D-412)
Tensile Strength: 1000 psi (ASTM D-412)
Density: 7.0 ± .1 lbs. /gal.
Weight Solids: 40%
Color: White

SILICONE 410
Type: UV Resistant Elastomeric
Elongation: 150%
Viscosity: 9,000 cps
Density: 9.2 lbs. /gal
Tensile Strength: 500 ± 50 psi
Volume Solids: 68% ± 1%
Color: White or Gray

URETHANE 520
Type: Single Component Moisture Cure Urethane
Elongation: 350%
Viscosity: 2,000 cps
Density: 9.2 lbs. /gal.
Tensile Strength: 975 psi
Volume Solids: 70% ± 1%
Color: Silver

FABRIC BOND 930
Type: Primer / Surface conditioner
Viscosity: 600-800 cps
Density: 8.3 ± .1 lbs. /gal.
Volume Solids: 38 % ± 1% by weight
Color: Blue

POLYESTER FABRIC
Type: Spun bound polyester
Tensile: 57 lbs.
Elongation: 61%

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 lot 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.

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.   HVAC condensate drains shall be properly routed to roof drains or plumbed off the roof.

3.   Wet roof insulation and damaged membranes are to be removed and replaced as necessary to match existing specified material.

4.   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 DENSDECK/SECUROCK INSTALLATION

A.   Adhere DensDeck/Securock with adhesive or fasteners as recommended by manufacturers installation instructions to meet minimum uplift requirement of I‑90. Verify the proper wind uplift requirements with local building code authority.

B.   Stagger all board joints.

C.   Install all boards snug to one another without damage. Cut accordingly for perimeter areas and all roof penetrations.

D.  All DensDeck/Securock installed in one day is to be covered with waterproofing the same day.

E.   Install metal drip edge on perimeter and cant strips at all corners.

F.   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.

3.03 FABRIC SYSTEM APPLICATION

A.   Weatherstar Coating's fabric should be installed using Fabric Bond 930 and 36" – 40" rolls of our polyester stitch bonded Fabric. Lay the fabric out on the dry roof and pour the Fabric Bond 930 out onto the fabric and use rollers and roof brooms to push the Fabric Bond 930 into the fabric making sure there are no fish-mouths and the fabric lays as flat as possible. The Fabric Bond 930 will penetrate the fabric and adhere to the roof substrate. Coverage rate for the Fabric Bond 930 is approximately two to two and one half gallons per 100 square feet.

B.   Seal Flashing penetrations and parapet walls in the same manner using 4"-40" Fabric depending on the area of need. Use the Fabric Bond 930 to adhere the fabric to the roof. Allow 24-72 hours for coating to dry underneath the fabric before proceeding with top coats.

3.04 COATING APPLICATION RATES

A.   ACRYLIC

1.   BASE COAT: Apply a base coat of Acrylic 211 at a rate of 1.5 gallons per one hundred square feet. Allow 24 hours to dry.

2.   TOP COAT: Apply a top coat of Acrylic 211 at a rate of 1.5 gallons per one hundred square feet. Allow 24 hours to dry.

B.   BUTYL

1.   BASE COAT: Apply a base coat of Butyl 310 at a rate of 1.75 gallons per one hundred square feet. Allow 24 hours to dry.

2.   TOP COAT: Apply a top coat of Butyl 310 at a rate of 1.75 gallons per one hundred square feet. Allow 24 hours to dry.

C.   SILICONE

1.   BASE COAT: Apply a base coat of Silicone 410 at a rate of 1.25 gallon per one hundred square feet. Allow 24 hours to dry.

2.   TOP COAT: Apply a top coat of Silicone 410 at a rate of 1.25 gallon per one hundred square feet. Allow 24 hours to dry.

D.  URETHANE

1.   BASE COAT: Apply a base coat of Urethane 520 at a rate of 1.25 gallon per one hundred square feet. Allow 24 hours to dry.

2.   TOP COAT: Apply a top coat of Urethane 520 at a rate of 1.25 gallon per one hundred square feet. Allow 24 hours to dry.

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.

3.05 PONDING

A.   Known ponding water areas are to be repaired using commonly acceptable roofing practices so as to allow proper drainage of roof area.

B.   Ponding water areas are a sign of possible mechanical failure in the roof. Water is to be intentionally diverted from ponding areas using accepted roofing practices. Ponded areas which evaporate within 7 days (under 1/2" deep) can be top coated with appropriate coating to increase water resistance. Contact American Weatherstar for details.

3.06 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. American WeatherStar Coatings must be completely dry before exposing to water or foot traffic. Keep American 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.

 

DensDeck^® is a registered trademark of Georgia-Pacific.

Securock^® is a registered trademark of USG.