A radiant barrier is installed in the attic meeting the radiant barrier requirements of section 152(f) 2 of the Title-24 Standards, or. Of 24 climate zones defined in the Sunset Western Garden Book and the 20 zones defined by the United States Department of Agriculture (USDA), California has 20 and 16, respectively. Refer to the requirements for each building envelope area, based on your project’s Climate Zone IECC 2015 Requirements by Climate Zone 3. The Title 24 prescriptive compliance approach requires a radiant barrier in climate zones with significant cooling loads (zones 2-15). The 2016 Building Energy Efficiency Standards apply to new construction of, and additions and alterations to, residential and nonresidential buildings. 3. Title 24 is the section of the California Code of Regulations which sets the Building Standards Code for the State of California. Call (888)828-9488 for a free consultation. Each zone has a different energy efficiency requirement shown as a “U-factor”. The cool roof requirements vary depending on the climate zone. There you will select your roofing slope type and roofing weight per sq. Additionally, roofing products used for meeting the Title 24, Part 6 requirements must be rated and labeled by the CRRC (see section 10-113 of Title 24, Part 6). Latitude: 33.95 N . In our example we are using tile roofing with a weight greater than 5 lb/sq. HVAC Prescriptive Threshold for Economizers The economizer requirements for the 2019 BEES … Then go down along the left hand column until you come to “Roofing Products”. The ages solar reflectance and thermal emittance requirements will vary, depending on the slope of the roof, climate zone, and the density of the roofing product. Manual describes each climate zone boundaries and list most California cities with its associated climate zone number. Climate Zones 1-5 and 8-16 Wall assemblies must not exceed a maximum U-factor† of 0.051 Climate Zones 6 & 7 Wall assemblies must not exceed a maximum U-factor† of 0.065 Mineral Wool Performance Attic Options Any attic insulation not listed under “Prescriptive” must use Performance options (e.g., unvented attics, or attics ft.  Then simply move to the right in the table until you see the Cool Roof requirements for your climate zone. The USDA plant hardiness map divides North America into 11 hardiness zones. If the three year aged solar reflectance value is not available from the CRRC, then you can input the initial solar reflectance value from the CRRC into the calculation listed below which will assume an aged solar reflectance for the cool roof material. As of January 1, 2010, the California Energy Commission’s updated Title-24 Building Energy Efficiency Standards for residential and non-residential roofing are now in force, otherwise know as “Cool-Roof”. The new Cool Roof requirements affect new construction, significant repairs of existing roofs, re-roofing, plus additions and alterations of existing buildings and homes. to adjust the Title 24 climate zone weather data to match the ASHRAE design day conditions for a specific city. The California Energy Commission updates the standards every three years. Insulation with a thermal resistance of at least 0.85hr ft2 degree F/btu or at least 3/4 inch air-space is added to the roof deck over an attic, or, 7. The Title-24 prescriptive requirements divide roofs into two categories, Low Slope (less than 2:12 pitch) and Steep Slope (greater than 2:12 pitch). Cool roofing materials now come in a wide variety of materials and colors. Cities may occasionally straddle two climate zones. The 2016 Standards took effect January 1, 2017. Efficiency Program. Basic Climate Conditions Careers. Sacramento, CA 95814. These requirements apply to nonresidential, high-rise residential, and low-rise residential buildings across California’s 16 climate zones. ft. or greater than 5 lb/sq. If the building can show compliance using the performance approach (Title-24 calculation), The new 2008 Title-24 Manual and the separate Standards and Appendix all refer to the Cool Roof requirements but these references and tables are spread out in all three documents making it difficult to locate specific facts and figures. In recent years roofing manufacturers have incorporated NIR-reflecting pigments in coatings applied to a variety of nonwhite roofing products, such as metal panels and clay tiles. Title 24 Walls: U-factor reduced to 0.048 2×6 @ 16″ OC framing – R21 cavity insulation AND R-5 continuous (in most Climate Zones). (Excerpted from the CEC Title 24 website) HVAC Sizing Though there are no limits to the actual size of the heating and cooling equipment of your next project, Title 24 does require that you properly calculate the heating and cooling load of your project. That is your Cool Roof specification for your roofing product. With the old 2005 Title-24 energy code a residential cool roof was an optional energy efficiency measure, however on January 1, 2010, cool roofs are now required for most residential buildings in many of California’s 16 climate zones. TITLE 24, PART 6, AND ASSOCIATED ADMINISTRATIVE REGULATIONS IN PART 1. The California Energy Commission updates the Building Energy Efficiency Standards every three years. The most common way of installing a radiant barrier is to use roof sheathing that has a radiant barrier bonded to it in the factory. We’ve posted a helpful compilation in pdf format of all the relevant Cool Roof Title-24 code references including Table 151-D. Cities and Buildings with at least R-30 ceiling insulation or, 4. Climate zone boundaries have changed . The state is divided into 16 different climate zones. 75 in all climate zones. There are 16 climate zones in the state. Title 24 calculations for all California projects, energy calculations, title 24 energy compliance forms, CEPE certified Title 24 energy consultants, experienced, low rates, fast turnaround. Climate Zone Assignments by Zip Code Building Energy Efficiency Standards - Title 24 Three year aged solar reflectance not available fro the CRRC. Email title24@energy.ca.gov or call Toll-free in California: 800-772-3300 or Outside California: 916-654-5106 for any 2019 worksheets, Building Energy Efficiency Standards - Title 24, Toll-free in California: 800-772-3300 California Energy Commission 1516 Ninth Street Sacramento, CA 95814. The climate zones are based on energy use, temperature, weather and other factors.This is explained in the Title 24 energy efficiency standards glossary section:"The Energy Commission established 16 climate zones that represent a geographic area for which an energy budget is established. Alternatively you can search for your zone by county through energy.gov’s here. The California Energy Commission adopted building standards that require solar photovoltaic systems starting in 2020. For climate zones 11 and 12 simply look across the table and then follow each column down the list for the minimum required energy feature.
2020 title 24 climate zones