The Hydro-Stop PremiumCoat system has been tested and greatly exceeds the requirements of the Department of Energy for being a cool roof system.* Over the past decade the Department of Energy has done extensive research on the advantages of cool roof systems and have positively concluded that by using a cool roof system one can:

• Reduce Cooling Energy Cost by 20% to 70%
• Reduce Air Pollution
• Extend Equipment Life
• Reduce the need for re-roofing
  

Hydro-Stop’s cool roof system does this by using these two principles.

• High Albedo-Hydro-Stop reflects or scatters over 78% of the amount of sunlight energy that is radiated on it. The DOE considers anything over 50% good and Hydro-Stop has one of the highest in the industry.
  
• Emissivity-Hydro-Stop radiates over 90% of its stored heat energy away from itself keeping which is equally important for having a cool roof. Hydro-Stop’s cool roof system can save you money on your cooling energy and can extend the life of your roof. By example...

This is a typical Hot Roof where summertime temperatures can exceed 180 degrees F!

The actual temperature of the roof at time of the inspection is 178 degrees F!

An installation of the Hydro-Stop PremiumCoat system at same time of the above inspection showing a completed PremiumCoat system on adjacent wing of roof. The temperature of the completed PremiumCoat “cool roof" is 85 Degrees cooler!

Cool Roof Testing (ASTM E-903; ASTM E-408)

To qualify as a cool roof system a roofing material must demonstrate at least an Albedo (total solar reflectance) of 50 percent and maintain at least an emissivity of at least 90 %. If either of these levels are not maintained the system is not truly a cool roof system. The newest testing standard qualifying for a cool roof system is the Hemispherical Spectral Reflectance (ASTM E-903) and Emittance Test (ASTM E-408)

The test report concluded that Hydro-Stop’s PremiumCoat system has one of the highest “cool roof” ratings available in the industry. PremiumCoat white FinishCoat achieved a rating of better than 78% Spectral Reflectance while maintaining an emittance of greater than 94%.