Title 24 Cool Roof Information for Homeowners
Information on California Title 24 Cool Roofing
Here you will find valuable information and links regarding Title 24 roofing.
How cool is a cool roof?
During the summer, a typical dark roof is 150 to 190 degrees Fahrenheit at peak, while cool roofs peak at 100 to 120 degrees Fahrenheit.
Where do I find cool roofs in California’s Title 24 Building Energy Efficiency Standards?
Cool roofs are included as a performance option in Title 24. Refer to Section 10-113 for information on certification and labeling requirements for reflectance and emittance of cool roof products. For the prescriptive compliance approach in the energy efficiency standards, view section 118 of Title 24. Sections 141, 142, and 151(b) outline the performance approach. For the latest applicable Standard see: www.energy.ca.gov/title24/
For updates and general information on Title 24 and to download the new Residential Manual (available August 2001), visit www.energy.ca.gov/title24/
What specifications does a roof need to meet to be considered for credit under the Title 24 Standards?
Commercial and residential products must meet the following specifications according to the ASTM standards outlined below:
| ASTM | Tiles | Multiply or Liquid | |
| Solar Reflectivity | E903 or E1918 | 0.40+ | 0.70+ |
| Emittance Factor | E408 | 0.75+ | 0.75+ |
Are rebates available for cool roofs?
In addition to energy and life cycle savings, rebates are available from some local utility companies for cool roofing in California. For more information on cool roof rebates, visit the Flex Your Power website at: www.fypower.org
**You will also need to check with your city, as some offer additional rebates.
Do cool roofs cost more than conventional roofs?
Initial material costs are comparable with traditional roofing materials – some cool products cost less than traditional materials, some cost up to 20% more. Cool protective coatings can be reapplied repeatedly every 10 to 15 years and reduce, if not eliminate the need for expensive roof tear-offs. Combining these maintenance savings with an average 20 percent savings on air conditioning costs make cool roofing a better bargain over the long term.
Where can I download the complete Title 24 standards manual?
Download the complete Title 24 standards manual here.
**This manual was re-certified by the state of California on January 1st, 2010