Understanding Energy Efficiency and the Cool Roof
Energy Efficiency and the Cool Roof
What is a Cool Roof?
Simply stated, a cool roof reflects and emits the suns heat energy back into the sky instead of transferring that heat energy into the building below. There are two basic characteristics that determine the “coolness” of a roof: Solar Reflectance and Thermal Emittance.
Both properties are measured on a scale from 0 to 1, with 1 being 100% reflective or emissive.
What is a Cool Roof?
Simply stated, a cool roof reflects and emits the suns heat energy back into the sky instead of transferring that heat energy into the building below. There are two basic characteristics that determine the “coolness” of a roof: Solar Reflectance and Thermal Emittance.
Both properties are measured on a scale from 0 to 1, with 1 being 100% reflective or emissive.
Cool Roof Rating Council Notification of Product Rating
Product Brand:
Product Model:
Solar Reflectance:
Thermal Emittance:
SRI:
AguaSeal
MonoTop White/2003-15
Initial: 0.86 Weathered: 0.83*
Initial: 0.91 Weathered: 0.90*
Initial: 109 3-Year: 105*
The Cool Roof Rating Council (CRRC), an ISO 17065 accredited organization, has reviewed the test results data provided by a CRRC-approved ISO 17025 testing laboratory and has determined this roofing product meets the requirements described in the ANSI/CRRC S100 Standard and the CRRC-1 Program Manual. This Notification of Rating is subject to all terms and conditions of the Licensee Agreement and the documents incorporated therein by reference. This document must be reproduced in its entirety.
The Notification of Rating certificate for the approved initial ratings is valid until an updated certificate is issued by the CRRC that includes the approved three-year aged ratings. The certificate with the approved three-year aged ratings is valid until either the CRRC or Licensee removes the product from the CRRC Rated Products Directory.
*CRRC Rapid Ratings: These are interim laboratory-aged values that simulate weathered values. These values will be replaced with the measured three-year aged values upon completion of the weathering process. SRI values calculated using Rapid Ratings may change once the aged rating replaces the interim rating.
Product Brand:
Product Model:
Solar Reflectance:
Thermal Emittance:
SRI:
Cool Roof Rating Council Notification of Product Rating
AguaSeal
MonoTop White/2003-15
Initial: 0.86 Weathered: 0.83*
Initial: 0.91 Weathered: 0.90*
Initial: 109 3-Year: 105*
Cool Roof Rating Council Notification of Product Rating
Product Brand: AguaSeal
Product Model: MonoTop White/2003-15
Solar Reflectance: Initial: 0.86 Weathered: 0.83*
Thermal Emittance: Initial: 0.91 Weathered: 0.90*
The Cool Roof Rating Council (CRRC), an ISO 17065 accredited organization, has reviewed the test results data provided by a CRRC-approved ISO 17025 testing laboratory and has determined this roofing product meets the requirements described in the ANSI/CRRC S100 Standard and the CRRC-1 Program Manual. This Notification of Rating is subject to all terms and conditions of the Licensee Agreement and the documents incorporated therein by reference. This document must be reproduced in its entirety.
The Notification of Rating certificate for the approved initial ratings is valid until an updated certificate is issued by the CRRC that includes the approved three-year aged ratings. The certificate with the approved three-year aged ratings is valid until either the CRRC or Licensee removes the product from the CRRC Rated Products Directory.
*CRRC Rapid Ratings: These are interim laboratory-aged values that simulate weathered values. These values will be replaced with the measured three-year aged values upon completion of the weathering process. SRI values calculated using Rapid Ratings may change once the aged rating replaces the interim rating.
Energy Efficiency
- Energy costs are, on average, nearly 30% of a typical facility operating expense.
- Every dollar spent on energy costs is a dollar lost.
- Although often overlooked, the roof is an ideal place to start reducing energy costs.
Light vs. Dark Roofs
- Light roofs offer a number of advantages over dark roofs.
- White roofs reflect the sun’s energy much more than dark roofs.
- White roofs absorb a lot more of the sun’s energy, ultimately keeping it from being transferred down into the building below.
The Benefits a Cool Roof?
- Lower internal building temperatures make for a more comfortable environment for employees and guests during the hot summer months.
- Energy costs are cut down by reducing the need for air conditioning as well as extending the life of cooling equipment that doesn’t have to work as hard to cool your facility.
- Reduction in the amount of air pollution by lowering CO2 and other emissions associated with fossil fuel-generated electricity used for air conditioning.
- Reduces the “urban heat island effect” by reflecting heat back into the atmosphere.
The Benefits a Cool Roof?
01
Lower internal building temperatures make for a more comfortable environment for employees and guests during the hot summer months.
02
Energy costs are cut down by reducing the need for air conditioning as well as extending the life of cooling equipment that doesn’t have to work as hard to cool your facility.
03
Reduction in the amount of air pollution by lowering CO2 and other emissions associated with fossil fuel-generated electricity used for air conditioning.
04
Reduces the “urban heat island effect” by reflecting heat back into the atmosphere.
Real World Cost Saving Examples
A Junior High School’s 165,000 square foot roof is a testimony to energy efficiency. A highly reflective white liquid-applied roof was installed over the existing roof substrate. A recent energy study conducted by an Environmental Services Director for the school system revealed that the school is saving 20-24% on their electricity
bills per year.
- Base Year – 1st year of application
- Year 01: $197,855
- Year 02: $150,545
- 1st year of savings – $47,310 (24% Reduction)
- Year 03: $157,482
- 2nd year of savings – $40,373 (20% Reduction)
Real World Cost Saving Examples
A Junior High School’s 165,000 square foot roof is a testimony to energy efficiency. A highly reflective white liquid-applied roof was installed over the existing roof substrate. A recent energy study conducted by an Environmental Services Director for the school system revealed that the school is saving 20-24% on their electricity
bills per year.
- Base Year – 1st year of application
- Year 01: $197,855
- Year 02: 150,545
- 1st year of savings – $47,310 (24% Reduction)
- Year 03: 157,482
- 2nd year of savings – $40,373 (20% Reduction)
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