Roof Tile Title 24 Aged Solar Reflectance Zone 9

To see which climate zone your project is in and the requirements associated with your building structure visit the cec s website.

Roof tile title 24 aged solar reflectance zone 9.

All rated roofing products will have a crrc label with the efficiency values listed. The roofing material s ability to reflect solar energy back into the atmosphere. The solar reflectance and thermal emittance values of roofing products. The below resources are not official title 24 documents.

Environmental protection agency s epa s energy star program california s title 24 and the leadership in energy and environmental design leed rating system qualify a cool roof in terms of solar reflectance sr and thermal emittance te or solar reflective index sri. A comparison between the way u s. Title 24 also rates sr after 3 years a value known as aged solar reflectance. The crrc rates roofing products and systems by measuring two important thermal properties.

In our example we are using tile roofing with a weight greater than 5 lb sq. One of the biggest factors in energy efficiency in bryan roofing is the ability of the roofing material to reflect solar energy. Located in climate zones 1 9 and 16. Aged solar reflectance index of 20 or a minimum sri a sri of 16 requirements vary by zone depending on the building and the climate method.

Overview of the ca title 24 standards. If your project meets one of the following conditions you can use any profile in any color on the roof. The los angeles green building code reflectivity requirement for a residential asphalt shingle is a minimum 3 year aged solar reflectance of 0 20 a minimum thermal emittance of 0 75 or a sri solar reflectance index of 16. Please refer to the actual code pdf for the requirements.

That is your cool roof specification for your roofing product. You can also contact the california energy commission by phone 800 772 3300 toll free in california or 916 654 5106 outside california or email title24 energy ca gov. As temperatures warm around the brazos valley many home owners take the opportunity to reroof their old roof for a roofing system that is more energy efficient. Cool roof shingles roofing products with high solar reflectance and thermal emittance are referred to as cool roof which is the outer layer or exterior surface of a roof.

This is also tied to thermal resistance of a roof as well. In a study by shiao and kalkanoglu during the. A cool color is defined as any product with an aged solar reflective index sri of 16 or greater actual or calculated.