Low-Slope Roofs: Surfaces with a slope of 2:12 inches or less. (As defined in ASTM Standard E 1918-97). Steep-Slope Roofs: Surfaces with a slope greater than 2:12 inches. Solar Spectrum: Radiation originating from the sun, including ultraviolet, visible, and near-infrared radiation. Approximately 99% of solar energy lies between wavelengths of 0.3 to 3.5 micrometers. Solar Flux: The direct and diffuse radiation from the sun received at ground level over the solar spectrum expressed in Watts per square meter. Solar Reflectance: The fraction of solar flux reflected by a surface expressed as a percent or within the range of 0.00 and 1.00. Emissivity: The emittance of a material refers to its ability to release absorbed heat. Scientists use a number between 0 and 1, or 0% and 100%, to express emittance. With the exception of a metallic surface, most roofing materials can have emittance values above 0.85 (85%). One example is a metal wrench left in the sun, which is hot to the touch because it has a low emissivity value. While many other Berridge colors meet or exceed Energy Star’s requirements, the following Berridge colors are Energy Star Certified.
Model Number | Product | Initial Solar Reflectance | SR after 3 years | Initial Emissivity | Low Slope | Steep Slope | Roof Cleaned Prior to 3rd Year Test | Warranty Term |
Aged Bronze | Metal | .25 | .25 | .83 | No | Yes | Yes | 40 YR |
Charcoal | Metal | .25 | .25 | .83 | No | Yes | Yes | 40 YR |
Copper Brown | Metal | .25 | .25 | .83 | No | Yes | Yes | 40 YR |
Dark Bronze | Metal | .25 | .25 | .83 | No | Yes | Yes | 40 YR |
Matte Black | Metal | .25 | .25 | .83 | No | Yes | Yes | 40 YR |
Medium Bronze | Metal | .25 | .25 | .83 | No | Yes | Yes | 40 YR |
Natural White | Metal | 0.77 | 0.71 | 0.82 | Yes | Yes | Yes | 40 YR |
Pre-Weathered Galvalume | Metal | .35 | .35 | .75 | No | Yes | Yes | 40 YR |
Sierra Tan | Metal | .32 | .32 | .83 | No | Yes | Yes | 40 YR |
Zinc Cote | Metal | .35 | .35 | .75 | No | Yes | Yes | 40 YR |
Zinc Grey | Metal | .35 | .35 | .83 | No | Yes | Yes | 40 YR |